[158] | 1 | ////////////////////////////////////////////////////////////////////////////////// |
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| 2 | // File : boot_handler.c |
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| 3 | // Date : 01/04/2012 |
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| 4 | // Author : alain greiner |
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| 5 | // Copyright (c) UPMC-LIP6 |
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| 6 | /////////////////////////////////////////////////////////////////////////////////// |
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| 7 | // The boot_handler.h and boot_handler.c files are part of the GIET nano-kernel. |
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| 8 | // This code can be used in the boot phase to launch one or several multi-tasks |
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| 9 | // applications on a many_cores hardware architecture. |
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| 10 | // It uses the SoCLib generic MMU (paged virtual memory) to provide two services: |
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| 11 | // |
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| 12 | // 1) classical memory protection, when several independant applications compiled |
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| 13 | // in different virtual spaces are executing on the same hardware platform. |
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| 14 | // 2) data placement in NUMA architectures, when we want to control the placement |
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| 15 | // of the software objects (virtual segments) on the physical memory banks. |
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| 16 | // |
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| 17 | // It uses the MAPPING_INFO binary data structures, that must be pre-loaded in the |
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| 18 | // boot ROM in the seg_boot_mapping segment (at address seg_boot_mapping_base). |
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| 19 | // This MAPPING_INFO data structure defines both the hardware architecture, |
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| 20 | // and the mapping: |
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| 21 | // - number of clusters, |
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| 22 | // - number of processors in each cluster, |
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| 23 | // - physical segmentation of the physical address space, |
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| 24 | // - number of virtual spaces (one multi-task application per vspace), |
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| 25 | // - number of tasks per vspace, |
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| 26 | // - number of mwmr channels per vspace, |
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| 27 | // - number of virtual segments per vspace, |
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| 28 | // - static placement of tasks on the processors, |
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| 29 | // - static placement of virtual segments (vseg) in the physical segments (pseg). |
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| 30 | // |
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| 31 | // The page table are statically constructed in the boot phase, and they do not |
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| 32 | // change during execution. The GIET uses only 4 Kbytes pages. |
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| 33 | // As most applications use only a limited number of segments, the number of PT2s |
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| 34 | // actually used by a given virtual space is generally smaller than 2048, and is |
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| 35 | // defined at compile time (GIET_NB_PT2_MAX configuration parameter). |
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| 36 | // For alignment constraints, GIET_NB_PT2_MAX must be an even number. |
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| 37 | // The max number of virtual spaces (GIET_NB_VSPACE_MAX) is a configuration parameter. |
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| 38 | // |
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| 39 | // Each page table (one page table per virtual space) is monolithic: |
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| 40 | // - a first 8K aligned PT1[2148] array, indexed by the (ix1) field of VPN. |
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| 41 | // The PT1 contains 2048 PTD of 4 bytes => 8K bytes. |
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| 42 | // - an aray of array PT2[1024][GIET_NB_PT2_MAX], indexed by |
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| 43 | // the (ix2) field of the VPN, and by the PT2 index (pt2_id). |
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| 44 | // Each PT2 contains 512 PTE2 of 8bytes => 4Kbytes * GIET_NB_PT2_MAX |
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| 45 | // The size of each page table is 8K + (GIET_NB_PT2_MAX)*4K bytes. |
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| 46 | // All page tables must be stored in the seg_kernel_pt segment (at address |
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| 47 | // seg_kernel_pt_base) |
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| 48 | //////////////////////////////////////////////////////////////////////////////////// |
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| 49 | |
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| 50 | #include <mips32_registers.h> |
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| 51 | #include <boot_handler.h> |
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| 52 | #include <mapping_info.h> |
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| 53 | #include <giet_config.h> |
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| 54 | #include <common.h> |
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| 55 | #include <ctx_handler.h> |
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| 56 | #include <irq_handler.h> |
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| 57 | #include <hwr_mapping.h> |
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| 58 | #include <mwmr.h> |
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| 59 | |
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| 60 | #define in_ptab __attribute__((section (".ptab"))) |
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| 61 | #define in_boot __attribute__((section (".boot"))) |
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| 62 | |
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| 63 | #if !defined(GIET_NB_VSPACE_MAX) |
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| 64 | # error The GIET_NB_VSPACE_MAX value must be defined in the 'giet_config.h' file ! |
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| 65 | #endif |
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| 66 | |
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| 67 | #if !defined(GIET_NB_PT2_MAX) |
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| 68 | # error The GIET_NB_PT2_MAX value must be defined in the 'giet_config.h' file ! |
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| 69 | #endif |
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| 70 | |
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| 71 | //////////////////////////////////////////////////////////////////////////// |
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| 72 | // Global variables |
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| 73 | //////////////////////////////////////////////////////////////////////////// |
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| 74 | |
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| 75 | // Page Tables (each one takes PT1_SIZE + (GIET_NB_PT2_MAX)*PT2_SIZE bytes |
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| 76 | // It will be stored in seg_kernel_pt segment |
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| 77 | in_ptab page_table_t _ptab_array[GIET_NB_VSPACE_MAX]; |
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| 78 | |
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| 79 | // PT2 allocator : next free PT2 index |
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| 80 | // will be stored in seg_kernel_data segment |
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| 81 | unsigned int _next_free_pt2[GIET_NB_VSPACE_MAX] = |
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| 82 | { [0 ... GIET_NB_VSPACE_MAX-1] = 0 }; |
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| 83 | |
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| 84 | |
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| 85 | ////////////////////////////////////////////////////////////////////////////// |
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| 86 | // boot_procid() |
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| 87 | ////////////////////////////////////////////////////////////////////////////// |
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| 88 | in_boot unsigned int boot_procid() |
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| 89 | { |
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| 90 | unsigned int ret; |
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| 91 | asm volatile("mfc0 %0, $15, 1" : "=r"(ret)); |
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| 92 | return (ret & 0x3FF); |
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| 93 | } |
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| 94 | |
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| 95 | ////////////////////////////////////////////////////////////////////////////// |
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| 96 | // boot_time() |
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| 97 | ////////////////////////////////////////////////////////////////////////////// |
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| 98 | in_boot unsigned int boot_time() |
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| 99 | { |
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| 100 | unsigned int ret; |
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| 101 | asm volatile("mfc0 %0, $9" : "=r"(ret)); |
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| 102 | return ret; |
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| 103 | } |
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| 104 | |
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| 105 | ////////////////////////////////////////////////////////////////////////////// |
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| 106 | // boot_exit() |
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| 107 | ////////////////////////////////////////////////////////////////////////////// |
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| 108 | in_boot void boot_exit() |
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| 109 | { |
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| 110 | while(1) asm volatile("nop"); |
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| 111 | } |
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| 112 | |
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| 113 | //////////////////////////////////////////////////////////////////////////// |
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| 114 | // boot_eret() |
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| 115 | //////////////////////////////////////////////////////////////////////////// |
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| 116 | in_boot void boot_eret() |
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| 117 | { |
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| 118 | asm volatile("eret"); |
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| 119 | } |
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| 120 | |
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| 121 | //////////////////////////////////////////////////////////////////////////// |
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| 122 | // boot_strncmp() |
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| 123 | //////////////////////////////////////////////////////////////////////////// |
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| 124 | in_boot int boot_strncmp( const char* s1, |
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| 125 | const char* s2, |
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| 126 | unsigned int n ) |
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| 127 | { |
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| 128 | unsigned int i; |
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| 129 | for ( i=0 ; i<n ; i++) |
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| 130 | { |
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| 131 | if ( s1[i] != s2[i] ) return 1; |
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| 132 | if ( s1[i] == 0 ) break; |
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| 133 | } |
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| 134 | return 0; |
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| 135 | } |
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| 136 | |
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| 137 | //////////////////////////////////////////////////////////////////////////// |
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| 138 | // boot_tty_puts() |
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| 139 | // (it uses TTY0) |
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| 140 | //////////////////////////////////////////////////////////////////////////// |
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| 141 | in_boot void boot_tty_puts(const char *buffer) |
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| 142 | { |
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| 143 | unsigned int* tty_address = (unsigned int*)&seg_tty_base; |
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| 144 | unsigned int n; |
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| 145 | |
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| 146 | for ( n=0; n<100; n++) |
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| 147 | { |
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| 148 | if (buffer[n] == 0) break; |
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| 149 | tty_address[0] = (unsigned int)buffer[n]; |
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| 150 | } |
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| 151 | } |
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| 152 | |
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| 153 | //////////////////////////////////////////////////////////////////////////// |
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| 154 | // boot_tty_putw() |
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| 155 | // (it uses TTY0) |
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| 156 | //////////////////////////////////////////////////////////////////////////// |
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| 157 | in_boot void boot_tty_putw(unsigned int val) |
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| 158 | { |
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| 159 | static const char HexaTab[] = "0123456789ABCDEF"; |
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| 160 | char buf[11]; |
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| 161 | unsigned int c; |
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| 162 | |
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| 163 | buf[0] = '0'; |
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| 164 | buf[1] = 'x'; |
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| 165 | buf[10] = 0; |
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| 166 | |
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| 167 | for ( c = 0 ; c < 8 ; c++ ) |
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| 168 | { |
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| 169 | buf[9-c] = HexaTab[val&0xF]; |
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| 170 | val = val >> 4; |
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| 171 | } |
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| 172 | boot_tty_puts(buf); |
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| 173 | } |
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| 174 | |
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| 175 | ///////////////////////////////////////////////////////////////////////////// |
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| 176 | // various mapping_info data structure access functions |
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| 177 | ///////////////////////////////////////////////////////////////////////////// |
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| 178 | in_boot mapping_cluster_t* boot_get_cluster_base( mapping_header_t* header ) |
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| 179 | { |
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| 180 | return (mapping_cluster_t*) ((char*)header + |
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| 181 | MAPPING_HEADER_SIZE); |
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| 182 | } |
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| 183 | ///////////////////////////////////////////////////////////////////////////// |
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| 184 | in_boot mapping_pseg_t* boot_get_pseg_base( mapping_header_t* header ) |
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| 185 | { |
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| 186 | return (mapping_pseg_t*) ((char*)header + |
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| 187 | MAPPING_HEADER_SIZE + |
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| 188 | MAPPING_CLUSTER_SIZE*header->clusters); |
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| 189 | } |
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| 190 | ///////////////////////////////////////////////////////////////////////////// |
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| 191 | in_boot mapping_vspace_t* boot_get_vspace_base( mapping_header_t* header ) |
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| 192 | { |
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| 193 | return (mapping_vspace_t*) ((char*)header + |
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| 194 | MAPPING_HEADER_SIZE + |
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| 195 | MAPPING_CLUSTER_SIZE*header->clusters + |
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| 196 | MAPPING_PSEG_SIZE*header->psegs); |
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| 197 | } |
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| 198 | ///////////////////////////////////////////////////////////////////////////// |
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| 199 | in_boot mapping_vseg_t* boot_get_vseg_base( mapping_header_t* header ) |
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| 200 | { |
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| 201 | return (mapping_vseg_t*) ((char*)header + |
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| 202 | MAPPING_HEADER_SIZE + |
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| 203 | MAPPING_CLUSTER_SIZE*header->clusters + |
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| 204 | MAPPING_PSEG_SIZE*header->psegs + |
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| 205 | MAPPING_VSPACE_SIZE*header->vspaces); |
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| 206 | } |
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| 207 | ///////////////////////////////////////////////////////////////////////////// |
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| 208 | in_boot mapping_task_t* boot_get_task_base( mapping_header_t* header ) |
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| 209 | { |
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| 210 | return (mapping_task_t*) ((char*)header + |
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| 211 | MAPPING_HEADER_SIZE + |
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| 212 | MAPPING_CLUSTER_SIZE*header->clusters + |
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| 213 | MAPPING_PSEG_SIZE*header->psegs + |
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| 214 | MAPPING_VSPACE_SIZE*header->vspaces + |
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| 215 | MAPPING_VSEG_SIZE*header->vsegs); |
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| 216 | } |
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| 217 | |
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| 218 | ///////////////////////////////////////////////////////////////////////////// |
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| 219 | // print the content of the mapping_info data structure |
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| 220 | //////////////////////////////////////////////////////////////////////// |
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| 221 | in_boot void boot_print_mapping_info() |
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| 222 | { |
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| 223 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
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| 224 | |
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| 225 | unsigned int vspace_id; |
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| 226 | unsigned int cluster_id; |
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| 227 | unsigned int pseg_id; |
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| 228 | unsigned int vseg_id; |
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| 229 | unsigned int task_id; |
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| 230 | |
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| 231 | mapping_cluster_t* cluster = boot_get_cluster_base( header ); |
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| 232 | mapping_pseg_t* pseg = boot_get_pseg_base( header );; |
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| 233 | mapping_vspace_t* vspace = boot_get_vspace_base ( header );; |
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| 234 | mapping_vseg_t* vseg = boot_get_vseg_base ( header ); |
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| 235 | mapping_task_t* task = boot_get_task_base ( header );; |
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| 236 | |
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| 237 | // header |
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| 238 | boot_tty_puts("mapping_info"); |
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| 239 | |
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| 240 | boot_tty_puts("\n - signature = "); |
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| 241 | boot_tty_putw(header->signature); |
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| 242 | boot_tty_puts("\n - name = "); |
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| 243 | boot_tty_puts(header->name); |
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| 244 | boot_tty_puts("\n - clusters = "); |
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| 245 | boot_tty_putw(header->clusters); |
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| 246 | boot_tty_puts("\n - psegs = "); |
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| 247 | boot_tty_putw(header->psegs); |
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| 248 | boot_tty_puts("\n - ttys = "); |
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| 249 | boot_tty_putw(header->ttys); |
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| 250 | boot_tty_puts("\n - vspaces = "); |
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| 251 | boot_tty_putw(header->vspaces); |
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| 252 | boot_tty_puts("\n - globals = "); |
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| 253 | boot_tty_putw(header->globals); |
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| 254 | boot_tty_puts("\n - vsegs = "); |
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| 255 | boot_tty_putw(header->vsegs); |
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| 256 | boot_tty_puts("\n - tasks = "); |
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| 257 | boot_tty_putw(header->tasks); |
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| 258 | boot_tty_puts("\n - syspath = "); |
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| 259 | boot_tty_puts(header->syspath); |
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| 260 | boot_tty_puts("\n\n"); |
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| 261 | |
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| 262 | // clusters |
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| 263 | for ( cluster_id = 0 ; cluster_id < header->clusters ; cluster_id++ ) |
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| 264 | { |
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| 265 | boot_tty_puts("cluster "); |
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| 266 | boot_tty_putw(cluster_id); |
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| 267 | |
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| 268 | boot_tty_puts("\n - procs = "); |
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| 269 | boot_tty_putw(cluster[cluster_id].procs); |
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| 270 | boot_tty_puts("\n - timers = "); |
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| 271 | boot_tty_putw(cluster[cluster_id].timers); |
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| 272 | boot_tty_puts("\n - dmas = "); |
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| 273 | boot_tty_putw(cluster[cluster_id].dmas); |
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| 274 | boot_tty_puts("\n\n"); |
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| 275 | } |
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| 276 | |
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| 277 | // psegs |
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| 278 | for ( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ ) |
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| 279 | { |
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| 280 | boot_tty_puts("pseg "); |
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| 281 | boot_tty_putw(pseg_id); |
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| 282 | |
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| 283 | boot_tty_puts("\n - name = "); |
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| 284 | boot_tty_puts( pseg[pseg_id].name ); |
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| 285 | boot_tty_puts("\n - base = "); |
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| 286 | boot_tty_putw( pseg[pseg_id].base ); |
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| 287 | boot_tty_puts("\n - length = "); |
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| 288 | boot_tty_putw( pseg[pseg_id].length ); |
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| 289 | boot_tty_puts("\n\n"); |
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| 290 | } |
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| 291 | |
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| 292 | // globals |
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| 293 | for ( vseg_id = 0 ; vseg_id < header->globals ; vseg_id++ ) |
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| 294 | { |
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| 295 | boot_tty_puts("global vseg "); |
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| 296 | boot_tty_putw(vseg_id); |
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| 297 | |
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| 298 | boot_tty_puts("\n - name = "); |
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| 299 | boot_tty_puts( vseg[vseg_id].name ); |
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| 300 | boot_tty_puts("\n - vbase = "); |
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| 301 | boot_tty_putw( vseg[vseg_id].vbase ); |
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| 302 | boot_tty_puts("\n - length = "); |
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| 303 | boot_tty_putw( vseg[vseg_id].length ); |
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| 304 | boot_tty_puts("\n - mode = "); |
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| 305 | boot_tty_putw( vseg[vseg_id].mode ); |
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| 306 | boot_tty_puts("\n - ident = "); |
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| 307 | boot_tty_putw( vseg[vseg_id].ident ); |
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| 308 | boot_tty_puts("\n - psegname = "); |
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| 309 | boot_tty_puts( pseg[vseg[vseg_id].psegid].name ); |
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| 310 | boot_tty_puts("\n\n"); |
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| 311 | } |
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| 312 | |
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| 313 | // vspaces |
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| 314 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
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| 315 | { |
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| 316 | boot_tty_puts("vspace "); |
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| 317 | boot_tty_putw(vspace_id); |
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| 318 | |
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| 319 | boot_tty_puts("\n - name = "); |
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| 320 | boot_tty_puts( vspace[vspace_id].name ); |
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| 321 | boot_tty_puts("\n - binpath = "); |
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| 322 | boot_tty_puts( vspace[vspace_id].binpath ); |
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| 323 | boot_tty_puts("\n - vsegs = "); |
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| 324 | boot_tty_putw( vspace[vspace_id].vsegs ); |
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| 325 | boot_tty_puts("\n - tasks = "); |
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| 326 | boot_tty_putw( vspace[vspace_id].tasks ); |
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| 327 | boot_tty_puts("\n - mwmrs = "); |
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| 328 | boot_tty_putw( vspace[vspace_id].mwmrs ); |
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| 329 | boot_tty_puts("\n - ttys = "); |
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| 330 | boot_tty_putw( vspace[vspace_id].ttys ); |
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| 331 | boot_tty_puts("\n\n"); |
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| 332 | |
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| 333 | for ( vseg_id = vspace[vspace_id].vseg_offset ; |
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| 334 | vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs) ; |
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| 335 | vseg_id++ ) |
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| 336 | { |
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| 337 | boot_tty_puts(" private vseg "); |
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| 338 | boot_tty_putw( vseg_id ); |
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| 339 | |
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| 340 | boot_tty_puts("\n - name = "); |
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| 341 | boot_tty_puts( vseg[vseg_id].name ); |
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| 342 | boot_tty_puts("\n - vbase = "); |
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| 343 | boot_tty_putw( vseg[vseg_id].vbase ); |
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| 344 | boot_tty_puts("\n - length = "); |
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| 345 | boot_tty_putw( vseg[vseg_id].length ); |
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| 346 | boot_tty_puts("\n - mode = "); |
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| 347 | boot_tty_putw( vseg[vseg_id].mode ); |
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| 348 | boot_tty_puts("\n - ident = "); |
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| 349 | boot_tty_putw( vseg[vseg_id].ident ); |
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| 350 | boot_tty_puts("\n - psegname = "); |
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| 351 | boot_tty_puts( pseg[vseg[vseg_id].psegid].name ); |
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| 352 | boot_tty_puts("\n\n"); |
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| 353 | } |
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| 354 | |
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| 355 | for ( task_id = vspace[vspace_id].vseg_offset ; |
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| 356 | task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks) ; |
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| 357 | task_id++ ) |
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| 358 | { |
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| 359 | boot_tty_puts(" task"); |
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| 360 | boot_tty_putw( task_id ); |
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| 361 | |
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| 362 | boot_tty_puts("\n - name = "); |
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| 363 | boot_tty_puts( task[task_id].name ); |
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| 364 | boot_tty_puts("\n - clusterid = "); |
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| 365 | boot_tty_putw( task[task_id].clusterid ); |
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| 366 | boot_tty_puts("\n - proclocid = "); |
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| 367 | boot_tty_putw( task[task_id].proclocid ); |
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| 368 | boot_tty_puts("\n - vseglocid = "); |
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| 369 | boot_tty_putw( task[task_id].vseglocid ); |
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| 370 | boot_tty_puts("\n - startid = "); |
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| 371 | boot_tty_putw( task[task_id].startid ); |
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| 372 | boot_tty_puts("\n - ttylocid = "); |
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| 373 | boot_tty_putw( task[task_id].ttylocid ); |
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| 374 | boot_tty_puts("\n\n"); |
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| 375 | } |
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| 376 | } |
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| 377 | } // end boot_print_mapping_info() |
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| 378 | |
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| 379 | ////////////////////////////////////////////////////////////////////////////// |
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| 380 | // boot_pseg_get() |
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| 381 | // This function returns the pointer on a physical segment |
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| 382 | // identified by the segment index. |
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| 383 | ////////////////////////////////////////////////////////////////////////////// |
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| 384 | in_boot mapping_pseg_t* boot_pseg_get( unsigned int seg_id) |
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| 385 | { |
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| 386 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
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| 387 | mapping_pseg_t* pseg = boot_get_pseg_base( header ); |
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| 388 | |
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| 389 | // checking argument |
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| 390 | if ( seg_id >= header->psegs ) |
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| 391 | { |
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| 392 | boot_tty_puts("\n[BOOT ERROR] : seg_id argument too large\n"); |
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| 393 | boot_tty_puts(" in function boot_pseg_get()\n"); |
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| 394 | boot_exit(); |
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| 395 | } |
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| 396 | |
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| 397 | return &pseg[seg_id]; |
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| 398 | } // end boot_pseg_get() |
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| 399 | |
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| 400 | ////////////////////////////////////////////////////////////////////////////// |
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| 401 | // boot_add_pte() |
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| 402 | // This function registers a new PTE in the page table pointed |
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| 403 | // by the vspace_id argument, and updates both PT1 and PT2. |
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| 404 | // A new PT2 is used when required. |
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| 405 | // As the set of PT2s is implemented as a fixed size array (no dynamic |
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| 406 | // allocation), this function checks a possible overflow of the PT2 array. |
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| 407 | ////////////////////////////////////////////////////////////////////////////// |
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| 408 | in_boot void boot_add_pte( unsigned int vspace_id, |
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| 409 | unsigned int vpn, |
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| 410 | unsigned int flags, |
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| 411 | unsigned int ppn ) |
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| 412 | { |
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| 413 | unsigned int ix1; |
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| 414 | unsigned int ix2; |
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| 415 | unsigned int ptba; // PT2 base address |
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| 416 | unsigned int pt2_id; // PT2 index |
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| 417 | unsigned int* pt_flags; // pointer on the pte_flags = &PT2[2*ix2] |
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| 418 | unsigned int* pt_ppn; // pointer on the pte_ppn = &PT2[2*ix2+1] |
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| 419 | |
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| 420 | ix1 = vpn >> 9; // 11 bits |
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| 421 | ix2 = vpn & 0x1FF; // 9 bits |
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| 422 | |
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| 423 | // get the page table base address |
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| 424 | page_table_t* pt = (page_table_t *)(&_ptab_array[vspace_id]); |
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| 425 | |
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| 426 | if ( (pt->pt1[ix1] & PTE_V) == 0 ) // set a new PTD in PT1 |
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| 427 | { |
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| 428 | pt2_id = _next_free_pt2[vspace_id]; |
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| 429 | if ( pt2_id == GIET_NB_PT2_MAX ) |
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| 430 | { |
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| 431 | boot_tty_puts("\n[BOOT ERROR] in boot_add_pte() function\n"); |
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| 432 | boot_tty_puts("the GIET_NB_PT2_MAX parameter is too small\n"); |
---|
| 433 | boot_exit(); |
---|
| 434 | } |
---|
| 435 | else |
---|
| 436 | { |
---|
| 437 | ptba = (unsigned int)pt + PT1_SIZE + PT2_SIZE*pt2_id; |
---|
| 438 | pt->pt1[ix1] = PTE_V | PTE_T | (ptba >> 12); |
---|
| 439 | _next_free_pt2[vspace_id] = pt2_id + 1; |
---|
| 440 | } |
---|
| 441 | } |
---|
| 442 | else |
---|
| 443 | { |
---|
| 444 | ptba = pt->pt1[ix1] << 12; |
---|
| 445 | } |
---|
| 446 | |
---|
| 447 | // set PTE2 after checking double mapping error |
---|
| 448 | pt_flags = (unsigned int*)(ptba + 8*ix2); |
---|
| 449 | pt_ppn = (unsigned int*)(ptba + 8*ix2 + 4); |
---|
| 450 | |
---|
| 451 | if ( ( *pt_flags & PTE_V) != 0 ) // page already mapped |
---|
| 452 | { |
---|
| 453 | boot_tty_puts("\n[BOOT ERROR] in boot_add_pte() function\n"); |
---|
| 454 | boot_tty_puts("page already mapped\n"); |
---|
| 455 | boot_exit(); |
---|
| 456 | } |
---|
| 457 | else // set PTE2 |
---|
| 458 | { |
---|
| 459 | *pt_flags = flags; |
---|
| 460 | *pt_ppn = ppn; |
---|
| 461 | } |
---|
| 462 | } // end boot_add_pte() |
---|
| 463 | |
---|
| 464 | ///////////////////////////////////////////////////////////////////// |
---|
| 465 | // This function build the page table for a given vspace. |
---|
| 466 | // The physical base addresses for all vsegs (global and private) |
---|
| 467 | // must have been previously computed. |
---|
| 468 | // It initializes the MWMR channels. |
---|
| 469 | ///////////////////////////////////////////////////////////////////// |
---|
| 470 | in_boot void boot_vspace_pt_build( unsigned int vspace_id ) |
---|
| 471 | { |
---|
| 472 | unsigned int vseg_id; |
---|
| 473 | unsigned int npages; |
---|
| 474 | unsigned int ppn; |
---|
| 475 | unsigned int vpn; |
---|
| 476 | unsigned int flags; |
---|
| 477 | unsigned int page_id; |
---|
| 478 | |
---|
| 479 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
| 480 | mapping_vspace_t* vspace = boot_get_vspace_base( header ); |
---|
| 481 | mapping_vseg_t* vseg = boot_get_vseg_base( header ); |
---|
| 482 | |
---|
| 483 | // global segments |
---|
| 484 | for ( vseg_id = 0 ; vseg_id < header->globals ; vseg_id++ ) |
---|
| 485 | { |
---|
| 486 | vpn = vseg[vseg_id].vbase >> 12; |
---|
| 487 | ppn = vseg[vseg_id].pbase >> 12; |
---|
| 488 | npages = vseg[vseg_id].length >> 12; |
---|
| 489 | if ( (vseg[vseg_id].length & 0xFFF) != 0 ) npages++; |
---|
| 490 | |
---|
| 491 | flags = PTE_V; |
---|
| 492 | if ( vseg[vseg_id].mode & C_MODE_MASK ) flags = flags | PTE_C; |
---|
| 493 | if ( vseg[vseg_id].mode & X_MODE_MASK ) flags = flags | PTE_X; |
---|
| 494 | if ( vseg[vseg_id].mode & W_MODE_MASK ) flags = flags | PTE_W; |
---|
| 495 | if ( vseg[vseg_id].mode & U_MODE_MASK ) flags = flags | PTE_U; |
---|
| 496 | |
---|
| 497 | #if BOOT_DEBUG_PT |
---|
| 498 | boot_tty_puts("- vseg "); |
---|
| 499 | boot_tty_puts( vseg[vseg_id].name ); |
---|
| 500 | boot_tty_puts(" / flags = "); |
---|
| 501 | boot_tty_putw( flags ); |
---|
| 502 | boot_tty_puts(" / npages = "); |
---|
| 503 | boot_tty_putw( npages ); |
---|
| 504 | boot_tty_puts("\n"); |
---|
| 505 | #endif |
---|
| 506 | // loop on 4K pages |
---|
| 507 | for ( page_id = 0 ; page_id < npages ; page_id++ ) |
---|
| 508 | { |
---|
| 509 | boot_add_pte( vspace_id, |
---|
| 510 | vpn, |
---|
| 511 | flags, |
---|
| 512 | ppn ); |
---|
| 513 | vpn++; |
---|
| 514 | ppn++; |
---|
| 515 | } |
---|
| 516 | } |
---|
| 517 | |
---|
| 518 | // private segments |
---|
| 519 | for ( vseg_id = vspace[vspace_id].vseg_offset ; |
---|
| 520 | vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs) ; |
---|
| 521 | vseg_id++ ) |
---|
| 522 | { |
---|
| 523 | vpn = vseg[vseg_id].vbase >> 12; |
---|
| 524 | ppn = vseg[vseg_id].pbase >> 12; |
---|
| 525 | npages = vseg[vseg_id].length >> 12; |
---|
| 526 | if ( (vseg[vseg_id].length & 0xFFF) != 0 ) npages++; |
---|
| 527 | |
---|
| 528 | flags = PTE_V; |
---|
| 529 | if ( vseg[vseg_id].mode & C_MODE_MASK ) flags = flags | PTE_C; |
---|
| 530 | if ( vseg[vseg_id].mode & X_MODE_MASK ) flags = flags | PTE_X; |
---|
| 531 | if ( vseg[vseg_id].mode & W_MODE_MASK ) flags = flags | PTE_W; |
---|
| 532 | if ( vseg[vseg_id].mode & U_MODE_MASK ) flags = flags | PTE_U; |
---|
| 533 | |
---|
| 534 | #if BOOT_DEBUG_PT |
---|
| 535 | boot_tty_puts("- vseg "); |
---|
| 536 | boot_tty_puts( vseg[vseg_id].name ); |
---|
| 537 | boot_tty_puts(" / flags = "); |
---|
| 538 | boot_tty_putw( flags ); |
---|
| 539 | boot_tty_puts("\n"); |
---|
| 540 | #endif |
---|
| 541 | // loop on 4K pages |
---|
| 542 | for ( page_id = 0 ; page_id < npages ; page_id++ ) |
---|
| 543 | { |
---|
| 544 | boot_add_pte( vspace_id, |
---|
| 545 | vpn, |
---|
| 546 | flags, |
---|
| 547 | ppn ); |
---|
| 548 | vpn++; |
---|
| 549 | ppn++; |
---|
| 550 | } |
---|
| 551 | |
---|
| 552 | // initializes MWMR channel if vseg is a MWMR |
---|
| 553 | // the channel storage capacity is (vseg.legth/4 - 5) words |
---|
| 554 | if ( vseg[vseg_id].mwmr ) |
---|
| 555 | { |
---|
| 556 | mwmr_channel_t* mwmr = (mwmr_channel_t*)(vseg[vseg_id].pbase); |
---|
| 557 | mwmr->ptw = 0; |
---|
| 558 | mwmr->ptr = 0; |
---|
| 559 | mwmr->sts = 0; |
---|
| 560 | mwmr->depth = (vseg[vseg_id].length>>2) - 5; |
---|
| 561 | mwmr->lock = 0; |
---|
| 562 | |
---|
| 563 | #if BOOT_DEBUG_PT |
---|
| 564 | boot_tty_puts(" MWMR channel depth = "); |
---|
| 565 | boot_tty_putw( mwmr->depth ); |
---|
| 566 | boot_tty_puts("\n"); |
---|
| 567 | #endif |
---|
| 568 | |
---|
| 569 | } |
---|
| 570 | } |
---|
| 571 | } // end boot_vspace_pt_build() |
---|
| 572 | |
---|
| 573 | ////////////////////////////////////////////////////////////////////// |
---|
| 574 | // This function uses the page tables to translate a virtual address |
---|
| 575 | // to a physical address, depending on the vspace index. |
---|
| 576 | ////////////////////////////////////////////////////////////////////// |
---|
| 577 | in_boot unsigned int boot_translate( unsigned int vaddr, |
---|
| 578 | unsigned int vspace_id ) |
---|
| 579 | { |
---|
| 580 | page_table_t* ptp; |
---|
| 581 | unsigned int* ptba; |
---|
| 582 | unsigned int paddr; |
---|
| 583 | |
---|
| 584 | // compute indexes |
---|
| 585 | unsigned int ix1 = (vaddr >> 21) & 0x7FF; |
---|
| 586 | unsigned int ix2 = (vaddr >> 12) & 0x1FF; |
---|
| 587 | unsigned int offset = vaddr & 0xFFF; |
---|
| 588 | |
---|
| 589 | // get the page table base address |
---|
| 590 | ptp = (page_table_t*)((char*)&seg_kernel_pt_base + vspace_id*sizeof(page_table_t)); |
---|
| 591 | |
---|
| 592 | // compute PTBA |
---|
| 593 | ptba = (unsigned int*)(ptp->pt1[ix1] << 12); |
---|
| 594 | |
---|
| 595 | // compute paddr |
---|
| 596 | paddr = (ptba[2*ix2 + 1] << 12) + offset; |
---|
| 597 | |
---|
| 598 | #if BOOT_DEBUG_TRANSLATE |
---|
| 599 | boot_tty_puts("\nAddress Translation\n"); |
---|
| 600 | boot_tty_puts("- vaddr = "); |
---|
| 601 | boot_tty_putw( vaddr ); |
---|
| 602 | boot_tty_puts("\n"); |
---|
| 603 | boot_tty_puts("- ix1 = "); |
---|
| 604 | boot_tty_putw( ix1 ); |
---|
| 605 | boot_tty_puts("\n"); |
---|
| 606 | boot_tty_puts("- ix2 = "); |
---|
| 607 | boot_tty_putw( ix2 ); |
---|
| 608 | boot_tty_puts("\n"); |
---|
| 609 | boot_tty_puts("- ptp = "); |
---|
| 610 | boot_tty_putw( (unsigned int)ptp ); |
---|
| 611 | boot_tty_puts("\n"); |
---|
| 612 | boot_tty_puts("- ptba = "); |
---|
| 613 | boot_tty_putw( (unsigned int)ptba ); |
---|
| 614 | boot_tty_puts("\n"); |
---|
| 615 | boot_tty_puts("- paddr = "); |
---|
| 616 | boot_tty_putw( paddr ); |
---|
| 617 | boot_tty_puts("\n"); |
---|
| 618 | #endif |
---|
| 619 | |
---|
| 620 | return paddr; |
---|
| 621 | } // end boot_translate() |
---|
| 622 | |
---|
| 623 | /////////////////////////////////////////////////////////////////////////////// |
---|
| 624 | // This function initialises the task context for a given vspace. |
---|
| 625 | // There is a private context array for each vspace, indexed by the |
---|
| 626 | // (task_id, proc_id) composite index. |
---|
| 627 | // The following values are written in the task context: |
---|
| 628 | // - SP stack pointer = stack_base + stack_length |
---|
| 629 | // - RA return address = &boot_eret |
---|
| 630 | // - EPC start address = start_vector[task->startid] |
---|
| 631 | // - SR status register = OxFF13 |
---|
| 632 | // - TTY TTY index = base_tty_id + tty_local_id |
---|
| 633 | // - PTPR page table base address / 8K |
---|
| 634 | // - MODE mmu_mode = 0xF (TLBs and caches activated) |
---|
| 635 | // It statically allocates the task to the proper scheduler |
---|
| 636 | // (one scheduler per processor). |
---|
| 637 | //////////////////////////////////////////////////////////////////////////////// |
---|
| 638 | in_boot void boot_task_map( unsigned int task_id, // global index |
---|
| 639 | unsigned int vspace_id, // global index |
---|
| 640 | unsigned int base_tty_id, |
---|
| 641 | unsigned int* start_vector ) |
---|
| 642 | { |
---|
| 643 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
| 644 | |
---|
| 645 | mapping_vseg_t* vseg = boot_get_vseg_base(header); |
---|
| 646 | mapping_task_t* task = boot_get_task_base(header); |
---|
| 647 | mapping_vspace_t* vspace = boot_get_vspace_base(header); |
---|
| 648 | |
---|
| 649 | unsigned int vseg_id; |
---|
| 650 | unsigned int loc_id; |
---|
| 651 | unsigned int proc_id; |
---|
| 652 | |
---|
| 653 | unsigned int sp; |
---|
| 654 | unsigned int ra = (unsigned int)&boot_eret; |
---|
| 655 | unsigned int epc = start_vector[task[task_id].startid]; |
---|
| 656 | unsigned int tty = base_tty_id + task[task_id].ttylocid; |
---|
| 657 | unsigned int sr = 0x0000FF13; |
---|
| 658 | unsigned int ptpr = ((unsigned int)&_ptab_array[vspace_id]) >> 13; |
---|
| 659 | unsigned int mode = 0xF; |
---|
| 660 | |
---|
| 661 | // check values |
---|
| 662 | if ( task[task_id].proclocid >= NB_PROCS ) |
---|
| 663 | { |
---|
| 664 | boot_tty_puts("\n[BOOT ERROR] : processor index too large for task "); |
---|
| 665 | boot_tty_puts( task[task_id].name ); |
---|
| 666 | boot_tty_puts(" in vspace "); |
---|
| 667 | boot_tty_puts( vspace[vspace_id].name ); |
---|
| 668 | boot_tty_puts("\n"); |
---|
| 669 | boot_exit(); |
---|
| 670 | } |
---|
| 671 | if ( task[task_id].clusterid >= NB_CLUSTERS ) |
---|
| 672 | { |
---|
| 673 | boot_tty_puts("\n[BOOT ERROR] : cluster index too large for task "); |
---|
| 674 | boot_tty_puts( task[task_id].name ); |
---|
| 675 | boot_tty_puts(" in vspace "); |
---|
| 676 | boot_tty_puts( vspace[vspace_id].name ); |
---|
| 677 | boot_tty_puts("\n"); |
---|
| 678 | boot_exit(); |
---|
| 679 | } |
---|
| 680 | if ( task[task_id].vseglocid >= vspace->vsegs ) |
---|
| 681 | { |
---|
| 682 | boot_tty_puts("\n[BOOT ERROR] : vseg index too large for task "); |
---|
| 683 | boot_tty_puts( task[task_id].name ); |
---|
| 684 | boot_tty_puts(" in vspace "); |
---|
| 685 | boot_tty_puts( vspace[vspace_id].name ); |
---|
| 686 | boot_tty_puts("\n"); |
---|
| 687 | boot_exit(); |
---|
| 688 | } |
---|
| 689 | if ( task[task_id].startid >= vspace->tasks ) |
---|
| 690 | { |
---|
| 691 | boot_tty_puts("\n[BOOT ERROR] : start index too large for task "); |
---|
| 692 | boot_tty_puts( task[task_id].name ); |
---|
| 693 | boot_tty_puts(" in vspace "); |
---|
| 694 | boot_tty_puts( vspace[vspace_id].name ); |
---|
| 695 | boot_tty_puts("\n"); |
---|
| 696 | boot_exit(); |
---|
| 697 | } |
---|
| 698 | if ( tty >= NB_TTYS ) |
---|
| 699 | { |
---|
| 700 | boot_tty_puts("\n[BOOT ERROR] : TTY index too large for task "); |
---|
| 701 | boot_tty_puts( task[task_id].name ); |
---|
| 702 | boot_tty_puts(" in vspace "); |
---|
| 703 | boot_tty_puts( vspace[vspace_id].name ); |
---|
| 704 | boot_tty_puts("\n"); |
---|
| 705 | boot_exit(); |
---|
| 706 | } |
---|
| 707 | |
---|
| 708 | // get stack pointer value |
---|
| 709 | vseg_id = task[task_id].vseglocid + vspace[vspace_id].vseg_offset; |
---|
| 710 | sp = vseg[vseg_id].vbase + vseg[vseg_id].length; |
---|
| 711 | |
---|
| 712 | // compute global processor index |
---|
| 713 | proc_id = task[task_id].clusterid * NB_PROCS + task[task_id].proclocid; |
---|
| 714 | |
---|
| 715 | // check local task index |
---|
| 716 | loc_id = _scheduler[proc_id].tasks; |
---|
| 717 | if ( loc_id >= GIET_NB_TASKS_MAX ) |
---|
| 718 | { |
---|
| 719 | boot_tty_puts("\n[BOOT ERROR] : too much tasks allocated to processor "); |
---|
| 720 | boot_tty_putw( proc_id ); |
---|
| 721 | boot_tty_puts("\n"); |
---|
| 722 | boot_exit(); |
---|
| 723 | } |
---|
| 724 | |
---|
| 725 | // update number of tasks allocated to scheduler |
---|
| 726 | _scheduler[proc_id].tasks = loc_id + 1; |
---|
| 727 | |
---|
| 728 | // initializes the task context |
---|
| 729 | _scheduler[proc_id].context[loc_id][CTX_SR_ID] = sr; |
---|
| 730 | _scheduler[proc_id].context[loc_id][CTX_SP_ID] = sp; |
---|
| 731 | _scheduler[proc_id].context[loc_id][CTX_RA_ID] = ra; |
---|
| 732 | _scheduler[proc_id].context[loc_id][CTX_EPC_ID] = epc; |
---|
| 733 | _scheduler[proc_id].context[loc_id][CTX_TTY_ID] = tty; |
---|
| 734 | _scheduler[proc_id].context[loc_id][CTX_PTPR_ID] = ptpr; |
---|
| 735 | _scheduler[proc_id].context[loc_id][CTX_MODE_ID] = mode; |
---|
| 736 | |
---|
| 737 | #if BOOT_DEBUG_CTX |
---|
| 738 | boot_tty_puts("Task "); |
---|
| 739 | boot_tty_puts( task[task_id].name ); |
---|
| 740 | boot_tty_puts(" allocated to processor "); |
---|
| 741 | boot_tty_putw( proc_id ); |
---|
| 742 | boot_tty_puts(" / loc_id = "); |
---|
| 743 | boot_tty_putw( loc_id ); |
---|
| 744 | boot_tty_puts("\n"); |
---|
| 745 | |
---|
| 746 | boot_tty_puts(" - SR = "); |
---|
| 747 | boot_tty_putw( sr ); |
---|
| 748 | boot_tty_puts(" saved at "); |
---|
| 749 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_SR_ID] ); |
---|
| 750 | boot_tty_puts("\n"); |
---|
| 751 | |
---|
| 752 | boot_tty_puts(" - RA = "); |
---|
| 753 | boot_tty_putw( ra ); |
---|
| 754 | boot_tty_puts(" saved at "); |
---|
| 755 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_RA_ID] ); |
---|
| 756 | boot_tty_puts("\n"); |
---|
| 757 | |
---|
| 758 | boot_tty_puts(" - SP = "); |
---|
| 759 | boot_tty_putw( sp ); |
---|
| 760 | boot_tty_puts(" saved at "); |
---|
| 761 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_SP_ID] ); |
---|
| 762 | boot_tty_puts("\n"); |
---|
| 763 | |
---|
| 764 | boot_tty_puts(" - EPC = "); |
---|
| 765 | boot_tty_putw( epc ); |
---|
| 766 | boot_tty_puts(" saved at "); |
---|
| 767 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_EPC_ID] ); |
---|
| 768 | boot_tty_puts("\n"); |
---|
| 769 | |
---|
| 770 | boot_tty_puts(" - TTY = "); |
---|
| 771 | boot_tty_putw( tty ); |
---|
| 772 | boot_tty_puts(" saved at "); |
---|
| 773 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_TTY_ID] ); |
---|
| 774 | boot_tty_puts("\n"); |
---|
| 775 | |
---|
| 776 | boot_tty_puts(" - PTPR = "); |
---|
| 777 | boot_tty_putw( ptpr<<13 ); |
---|
| 778 | boot_tty_puts(" saved at "); |
---|
| 779 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_PTPR_ID] ); |
---|
| 780 | boot_tty_puts("\n"); |
---|
| 781 | |
---|
| 782 | boot_tty_puts(" - MODE = "); |
---|
| 783 | boot_tty_putw( mode ); |
---|
| 784 | boot_tty_puts(" saved at "); |
---|
| 785 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_MODE_ID] ); |
---|
| 786 | boot_tty_puts("\n"); |
---|
| 787 | #endif |
---|
| 788 | |
---|
| 789 | } // end boot_task_map() |
---|
| 790 | |
---|
| 791 | /////////////////////////////////////////////////////////////////////////// |
---|
| 792 | // This function compute the physical base address for a vseg |
---|
| 793 | // as specified in the mapping info data structure. |
---|
| 794 | // It updates the pbase field of the vseg. |
---|
| 795 | // It updates the page allocator (nextfreepage field of the pseg), |
---|
| 796 | // and checks a possible pseg overflow. |
---|
| 797 | /////////////////////////////////////////////////////////////////////////// |
---|
| 798 | in_boot void boot_vseg_map( mapping_vseg_t* vseg ) |
---|
| 799 | { |
---|
| 800 | unsigned int pages; |
---|
| 801 | |
---|
| 802 | // check vseg alignment on 4K pages |
---|
| 803 | if ( (vseg->vbase & 0xfff) != 0 ) |
---|
| 804 | { |
---|
| 805 | boot_tty_puts("\n[BOOT ERROR] in boot_vseg_map() function\n"); |
---|
| 806 | boot_tty_puts("virtual segment base address not aligned: "); |
---|
| 807 | boot_tty_puts( vseg->name ); |
---|
| 808 | boot_tty_puts("\n"); |
---|
| 809 | boot_exit(); |
---|
| 810 | } |
---|
| 811 | |
---|
| 812 | // computes number of pages |
---|
| 813 | pages = vseg->length >> 12; |
---|
| 814 | if ( (vseg->length & 0xFFF) != 0 ) pages++; |
---|
| 815 | |
---|
| 816 | // get physical segment pointer |
---|
| 817 | mapping_pseg_t* pseg = boot_pseg_get( vseg->psegid ); |
---|
| 818 | |
---|
| 819 | // compute physical base address |
---|
| 820 | if ( vseg->ident != 0 ) // identity mapping required |
---|
| 821 | { |
---|
| 822 | // check physical segment overflow |
---|
| 823 | if ( (vseg->vbase < pseg->base) || |
---|
| 824 | ((vseg->vbase + vseg->length) > (pseg->base + pseg->length)) ) |
---|
| 825 | { |
---|
| 826 | boot_tty_puts("\n[BOOT ERROR] in boot_vseg_map() function\n"); |
---|
| 827 | boot_tty_puts("impossible identity mapping for virtual segment: "); |
---|
| 828 | boot_tty_puts( vseg->name ); |
---|
| 829 | boot_tty_puts("\n"); |
---|
| 830 | boot_exit(); |
---|
| 831 | } |
---|
| 832 | vseg->pbase = vseg->vbase; |
---|
| 833 | } |
---|
| 834 | else // unconstrained mapping |
---|
| 835 | { |
---|
| 836 | // check physical segment overflow |
---|
| 837 | if ( (vseg->vbase + vseg->length) > (pseg->base + pseg->length) ) |
---|
| 838 | { |
---|
| 839 | boot_tty_puts("\n[BOOT ERROR] in boot_vseg_map() function\n"); |
---|
| 840 | boot_tty_puts("physical segment "); |
---|
| 841 | boot_tty_puts( pseg->name ); |
---|
| 842 | boot_tty_puts(" is too small to map virtual segment"); |
---|
| 843 | boot_tty_puts( vseg->name ); |
---|
| 844 | boot_tty_puts("\n"); |
---|
| 845 | boot_exit(); |
---|
| 846 | } |
---|
| 847 | vseg->pbase = pseg->base + (pseg->next_free_page<<12); |
---|
| 848 | pseg->next_free_page = pseg->next_free_page + pages; |
---|
| 849 | } |
---|
| 850 | |
---|
| 851 | #if BOOT_DEBUG_PT |
---|
| 852 | boot_tty_puts("- vseg "); |
---|
| 853 | boot_tty_puts( vseg->name ); |
---|
| 854 | boot_tty_puts(" : vbase = "); |
---|
| 855 | boot_tty_putw( vseg->vbase ); |
---|
| 856 | boot_tty_puts(" / pbase = "); |
---|
| 857 | boot_tty_putw( vseg->pbase ); |
---|
| 858 | boot_tty_puts("\n"); |
---|
| 859 | #endif |
---|
| 860 | |
---|
| 861 | } // end boot_vseg_map() |
---|
| 862 | |
---|
| 863 | ///////////////////////////////////////////////////////////////////// |
---|
| 864 | // This function cheks the mapping_info data structure |
---|
| 865 | ///////////////////////////////////////////////////////////////////// |
---|
| 866 | in_boot void boot_check_mapping() |
---|
| 867 | { |
---|
| 868 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
| 869 | |
---|
| 870 | // checking mapping availability |
---|
| 871 | if ( header->signature != IN_MAPPING_SIGNATURE ) |
---|
| 872 | { |
---|
| 873 | boot_tty_puts("\n[BOOT ERROR] Illegal mapping signature: "); |
---|
| 874 | boot_tty_putw(header->signature); |
---|
| 875 | boot_tty_puts("\n"); |
---|
| 876 | boot_exit(); |
---|
| 877 | } |
---|
| 878 | |
---|
| 879 | #if BOOT_DEBUG_VIEW |
---|
| 880 | boot_print_mapping_info(); |
---|
| 881 | #endif |
---|
| 882 | |
---|
| 883 | // checking double definition of NB_CLUSTERS |
---|
| 884 | if ( header->clusters != NB_CLUSTERS ) |
---|
| 885 | { |
---|
| 886 | boot_tty_puts("\n[BOOT ERROR] Incoherent NB_CLUSTERS"); |
---|
| 887 | boot_tty_puts("\n - In giet_config, value = "); |
---|
| 888 | boot_tty_putw ( NB_CLUSTERS ); |
---|
| 889 | boot_tty_puts("\n - In mapping_info, value = "); |
---|
| 890 | boot_tty_putw ( header->clusters ); |
---|
| 891 | boot_tty_puts("\n"); |
---|
| 892 | boot_exit(); |
---|
| 893 | } |
---|
| 894 | |
---|
| 895 | // checking double definition of NB_TTYS |
---|
| 896 | if ( header->ttys != NB_TTYS ) |
---|
| 897 | { |
---|
| 898 | boot_tty_puts("\n[BOOT ERROR] Incoherent NB_TTYS"); |
---|
| 899 | boot_tty_puts("\n - In giet_config, value = "); |
---|
| 900 | boot_tty_putw ( NB_TTYS ); |
---|
| 901 | boot_tty_puts("\n - In mapping_info, value = "); |
---|
| 902 | boot_tty_putw ( header->ttys ); |
---|
| 903 | boot_tty_puts("\n"); |
---|
| 904 | boot_exit(); |
---|
| 905 | } |
---|
| 906 | |
---|
| 907 | // GIET_NB_PT2_MAX must be even |
---|
| 908 | if ( (GIET_NB_PT2_MAX & 0x1) != 0 ) |
---|
| 909 | { |
---|
| 910 | boot_tty_puts("\n[BOOT ERROR] : GIET_NB_PT2_MAX must be an even numver\n"); |
---|
| 911 | boot_tty_puts("\n"); |
---|
| 912 | boot_exit(); |
---|
| 913 | } |
---|
| 914 | |
---|
| 915 | // number of virtual spaces no larger than GIET_NB_VSPACE_MAX |
---|
| 916 | if ( header->vspaces > GIET_NB_VSPACE_MAX ) |
---|
| 917 | { |
---|
| 918 | boot_tty_puts("\n[BOOT ERROR] : number of vspaces > GIET_NB_VSPACE_MAX\n"); |
---|
| 919 | boot_tty_puts("\n"); |
---|
| 920 | boot_exit(); |
---|
| 921 | } |
---|
| 922 | } // end boot_check_mapping() |
---|
| 923 | |
---|
| 924 | ///////////////////////////////////////////////////////////////////// |
---|
| 925 | // This function builds the page tables for all virtual spaces |
---|
| 926 | // defined in the mapping_info data structure. |
---|
| 927 | // For each virtual space, it maps both the global virtual segments |
---|
| 928 | // (replicated in all vspaces), and the private virtuals segments. |
---|
| 929 | ///////////////////////////////////////////////////////////////////// |
---|
| 930 | in_boot void boot_pt_init() |
---|
| 931 | { |
---|
| 932 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
| 933 | |
---|
| 934 | mapping_vspace_t* vspace = boot_get_vspace_base( header ); |
---|
| 935 | mapping_pseg_t* pseg = boot_get_pseg_base( header ); |
---|
| 936 | mapping_vseg_t* vseg = boot_get_vseg_base( header ); |
---|
| 937 | |
---|
| 938 | unsigned int vspace_id; |
---|
| 939 | unsigned int vseg_id; |
---|
| 940 | unsigned int pseg_id; |
---|
| 941 | |
---|
| 942 | // first loop on virtual spaces to map global vsegs |
---|
| 943 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
---|
| 944 | { |
---|
| 945 | |
---|
| 946 | #if BOOT_DEBUG_PT |
---|
| 947 | boot_tty_puts("\n******* mapping global vsegs in vspace "); |
---|
| 948 | boot_tty_puts(vspace[vspace_id].name); |
---|
| 949 | boot_tty_puts(" ********\n"); |
---|
| 950 | #endif |
---|
| 951 | |
---|
| 952 | // physical page allocators must be re-initialised for each vspace |
---|
| 953 | for ( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ ) |
---|
| 954 | { |
---|
| 955 | pseg[pseg_id].next_free_page = 0; |
---|
| 956 | } |
---|
| 957 | |
---|
| 958 | for ( vseg_id = 0 ; vseg_id < header->globals ; vseg_id++ ) |
---|
| 959 | { |
---|
| 960 | boot_vseg_map( &vseg[vseg_id] ); |
---|
| 961 | } |
---|
| 962 | } |
---|
| 963 | |
---|
| 964 | // second loop on virtual spaces to map private vsegs |
---|
| 965 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
---|
| 966 | { |
---|
| 967 | |
---|
| 968 | #if BOOT_DEBUG_PT |
---|
| 969 | boot_tty_puts("\n******* mapping private vsegs in vspace "); |
---|
| 970 | boot_tty_puts(vspace[vspace_id].name); |
---|
| 971 | boot_tty_puts(" ********\n"); |
---|
| 972 | #endif |
---|
| 973 | |
---|
| 974 | for ( vseg_id = vspace[vspace_id].vseg_offset ; |
---|
| 975 | vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs) ; |
---|
| 976 | vseg_id++ ) |
---|
| 977 | { |
---|
| 978 | boot_vseg_map( &vseg[vseg_id] ); |
---|
| 979 | } |
---|
| 980 | } |
---|
| 981 | |
---|
| 982 | // third loop on the vspaces to build the page tables |
---|
| 983 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
---|
| 984 | { |
---|
| 985 | |
---|
| 986 | #if BOOT_DEBUG_PT |
---|
| 987 | boot_tty_puts("\n******* building page table for vspace "); |
---|
| 988 | boot_tty_puts(vspace[vspace_id].name); |
---|
| 989 | boot_tty_puts(" ********\n"); |
---|
| 990 | #endif |
---|
| 991 | |
---|
| 992 | boot_vspace_pt_build( vspace_id ); |
---|
| 993 | } |
---|
| 994 | } // end boot_pt_init() |
---|
| 995 | |
---|
| 996 | /////////////////////////////////////////////////////////////////////////////// |
---|
| 997 | // This function sets the schedulers default values for all processors |
---|
| 998 | // (tasks <= 0, and current <= 0). |
---|
| 999 | // Then it scan all tasks (in all vspaces) to initialise the schedulers, |
---|
| 1000 | // the tasks contexts, as defined in the mapping_info data structure. |
---|
| 1001 | // A global TTY index is allocated to each task, as specified in the mapping. |
---|
| 1002 | // TTY0 is reserved for the kernel. |
---|
| 1003 | /////////////////////////////////////////////////////////////////////////////// |
---|
| 1004 | in_boot void boot_tcg_init() |
---|
| 1005 | { |
---|
| 1006 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
| 1007 | |
---|
| 1008 | mapping_vspace_t* vspace = boot_get_vspace_base( header ); |
---|
| 1009 | mapping_vseg_t* vseg = boot_get_vseg_base( header ); |
---|
| 1010 | mapping_cluster_t* cluster = boot_get_cluster_base( header ); |
---|
| 1011 | |
---|
| 1012 | unsigned int* start_vector_base; |
---|
| 1013 | |
---|
| 1014 | unsigned int base_tty_id = 1; // TTY allocator |
---|
| 1015 | |
---|
| 1016 | unsigned int cluster_id; |
---|
| 1017 | unsigned int proc_id; |
---|
| 1018 | unsigned int vspace_id; |
---|
| 1019 | unsigned int task_id; |
---|
| 1020 | |
---|
| 1021 | // initialise the schedulers (not done by the compiler/loader) |
---|
| 1022 | for ( cluster_id = 0 ; cluster_id < header->clusters ; cluster_id++ ) |
---|
| 1023 | { |
---|
| 1024 | for ( proc_id = 0 ; proc_id < cluster[cluster_id].procs ; proc_id++ ) |
---|
| 1025 | { |
---|
| 1026 | if ( proc_id >= NB_PROCS ) |
---|
| 1027 | { |
---|
| 1028 | boot_tty_puts("\n[BOOT ERROR] The number of processors in cluster "); |
---|
| 1029 | boot_tty_putw( cluster_id ); |
---|
| 1030 | boot_tty_puts(" is larger than NB_PROCS \n"); |
---|
| 1031 | boot_exit(); |
---|
| 1032 | } |
---|
| 1033 | _scheduler[cluster_id*NB_PROCS+proc_id].tasks = 0; |
---|
| 1034 | _scheduler[cluster_id*NB_PROCS+proc_id].current = 0; |
---|
| 1035 | } |
---|
| 1036 | } |
---|
| 1037 | |
---|
| 1038 | // main loop on the virtual spaces |
---|
| 1039 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
---|
| 1040 | { |
---|
| 1041 | |
---|
| 1042 | #if BOOT_DEBUG_CTX |
---|
| 1043 | boot_tty_puts("\n******* mapping tasks and channels in vspace "); |
---|
| 1044 | boot_tty_puts(vspace[vspace_id].name); |
---|
| 1045 | boot_tty_puts(" ********\n"); |
---|
| 1046 | #endif |
---|
| 1047 | |
---|
| 1048 | // Get the physical address of the start_vector for the vspace. |
---|
| 1049 | // The start_vector is stored at the beginning of the seg_data segment, |
---|
| 1050 | // and contains the start addresses for all tasks defined in a vspace. |
---|
| 1051 | // The seg_data segment must be the first vseg defined in |
---|
| 1052 | // the mapping_info data structure. |
---|
| 1053 | mapping_vseg_t* vseg_data = &vseg[ vspace[vspace_id].vseg_offset]; |
---|
| 1054 | start_vector_base = (unsigned int*)boot_translate( vseg_data->vbase, |
---|
| 1055 | vspace_id ); |
---|
| 1056 | // map tasks |
---|
| 1057 | for ( task_id = vspace[vspace_id].task_offset ; |
---|
| 1058 | task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks) ; |
---|
| 1059 | task_id++ ) |
---|
| 1060 | { |
---|
| 1061 | boot_task_map( task_id, |
---|
| 1062 | vspace_id, |
---|
| 1063 | base_tty_id, |
---|
| 1064 | start_vector_base ); |
---|
| 1065 | } |
---|
| 1066 | |
---|
| 1067 | // increment TTY allocator |
---|
| 1068 | base_tty_id = base_tty_id + vspace[vspace_id].ttys; |
---|
| 1069 | } |
---|
| 1070 | } // end boot_tc_init() |
---|
| 1071 | |
---|
| 1072 | ///////////////////////////////////////////////////////////////////// |
---|
| 1073 | // This function signals the mapping completion by writing |
---|
| 1074 | // a new value in the mapping_info signature. |
---|
| 1075 | ///////////////////////////////////////////////////////////////////// |
---|
| 1076 | in_boot void boot_mapping_done() |
---|
| 1077 | { |
---|
| 1078 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
| 1079 | header->signature = OUT_MAPPING_SIGNATURE; |
---|
| 1080 | } // end boot_mapping_done() |
---|
| 1081 | |
---|
| 1082 | //////////////////////////////////////////////////////////////////////////////// |
---|
| 1083 | // boot_peri_init() |
---|
| 1084 | // This generic function initializes the interrupt vector, the ICU masks, |
---|
| 1085 | // and the timers for the context switch. |
---|
| 1086 | // The hardware parameters are NB_CLUSTERS, NB_PROCS, NB_TIMERS, NB_DMAS |
---|
| 1087 | // CLUSTER_SPAN, seg_icu_base, seg_timer_base. |
---|
| 1088 | // The number of processor per cluster cannot be larger than 8. |
---|
| 1089 | // The total number of TTYs cannot be larger than 15. |
---|
| 1090 | // The NB_TIMERS, NB_DMAS & NB_PROCS parameters must be equal. |
---|
| 1091 | //////////////////////////////////////////////////////////////////////////////// |
---|
| 1092 | in_boot void boot_peri_init() |
---|
| 1093 | { |
---|
| 1094 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
| 1095 | mapping_cluster_t* cluster = boot_get_cluster_base( header ); |
---|
| 1096 | |
---|
| 1097 | unsigned int cluster_id; |
---|
| 1098 | |
---|
| 1099 | if ( NB_TIMERS != NB_PROCS ) |
---|
| 1100 | { |
---|
| 1101 | boot_tty_puts("\n[BOOT ERROR] NB_TIMERS != NB_PROCS\n"); |
---|
| 1102 | boot_exit(); |
---|
| 1103 | } |
---|
| 1104 | if ( NB_DMAS != NB_PROCS ) |
---|
| 1105 | { |
---|
| 1106 | boot_tty_puts("\n[BOOT ERROR] NB_DMAS != NB_PROCS\n"); |
---|
| 1107 | boot_exit(); |
---|
| 1108 | } |
---|
| 1109 | |
---|
| 1110 | // interrupt vector initialisation |
---|
| 1111 | |
---|
| 1112 | _interrupt_vector[0] = &_isr_ioc; |
---|
| 1113 | |
---|
| 1114 | _interrupt_vector[1] = &_isr_tty_get_0; |
---|
| 1115 | _interrupt_vector[2] = &_isr_tty_get_1; |
---|
| 1116 | _interrupt_vector[3] = &_isr_tty_get_2; |
---|
| 1117 | _interrupt_vector[4] = &_isr_tty_get_3; |
---|
| 1118 | _interrupt_vector[5] = &_isr_tty_get_4; |
---|
| 1119 | _interrupt_vector[6] = &_isr_tty_get_5; |
---|
| 1120 | _interrupt_vector[7] = &_isr_tty_get_6; |
---|
| 1121 | _interrupt_vector[8] = &_isr_tty_get_7; |
---|
| 1122 | _interrupt_vector[9] = &_isr_tty_get_8; |
---|
| 1123 | _interrupt_vector[10] = &_isr_tty_get_9; |
---|
| 1124 | _interrupt_vector[11] = &_isr_tty_get_10; |
---|
| 1125 | _interrupt_vector[12] = &_isr_tty_get_11; |
---|
| 1126 | _interrupt_vector[13] = &_isr_tty_get_12; |
---|
| 1127 | _interrupt_vector[14] = &_isr_tty_get_13; |
---|
| 1128 | _interrupt_vector[14] = &_isr_tty_get_14; |
---|
| 1129 | |
---|
| 1130 | |
---|
| 1131 | _interrupt_vector[16] = &_isr_switch; |
---|
| 1132 | _interrupt_vector[17] = &_isr_dma; |
---|
| 1133 | _interrupt_vector[18] = &_isr_switch; |
---|
| 1134 | _interrupt_vector[19] = &_isr_dma; |
---|
| 1135 | _interrupt_vector[20] = &_isr_switch; |
---|
| 1136 | _interrupt_vector[21] = &_isr_dma; |
---|
| 1137 | _interrupt_vector[22] = &_isr_switch; |
---|
| 1138 | _interrupt_vector[23] = &_isr_dma; |
---|
| 1139 | _interrupt_vector[24] = &_isr_switch; |
---|
| 1140 | _interrupt_vector[25] = &_isr_dma; |
---|
| 1141 | _interrupt_vector[26] = &_isr_switch; |
---|
| 1142 | _interrupt_vector[27] = &_isr_dma; |
---|
| 1143 | _interrupt_vector[28] = &_isr_switch; |
---|
| 1144 | _interrupt_vector[29] = &_isr_dma; |
---|
| 1145 | _interrupt_vector[30] = &_isr_switch; |
---|
| 1146 | _interrupt_vector[31] = &_isr_dma; |
---|
| 1147 | |
---|
| 1148 | // ICU MASKs and TIMERS initialisation |
---|
| 1149 | |
---|
| 1150 | volatile unsigned int* icu = (unsigned int*)&seg_icu_base; |
---|
| 1151 | volatile unsigned int* timer = (unsigned int*)&seg_timer_base; |
---|
| 1152 | |
---|
| 1153 | for ( cluster_id = 0 ; cluster_id < header->clusters ; cluster_id++ ) |
---|
| 1154 | { |
---|
| 1155 | if ( cluster[cluster_id].procs == 0 ) break; |
---|
| 1156 | |
---|
| 1157 | icu[ICU_MASK_SET + 0*ICU_SPAN] = 0x000380FF; // ICU_MASK for proc 0 |
---|
| 1158 | if ( _scheduler[cluster_id*NB_PROCS + 0].tasks > 1 ) |
---|
| 1159 | { |
---|
| 1160 | timer[TIMER_PERIOD + 0*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
| 1161 | timer[TIMER_MODE + 0*TIMER_SPAN] = 0x3; |
---|
| 1162 | } |
---|
| 1163 | |
---|
| 1164 | if ( cluster[cluster_id].procs == 1 ) break; |
---|
| 1165 | |
---|
| 1166 | icu[ICU_MASK_SET + 1*ICU_SPAN] = 0x000C0000; // ICU_MASK for proc 1 |
---|
| 1167 | if ( _scheduler[cluster_id*NB_PROCS + 1].tasks > 1 ) |
---|
| 1168 | { |
---|
| 1169 | timer[TIMER_PERIOD + 1*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
| 1170 | timer[TIMER_MODE + 1*TIMER_SPAN] = 0x3; |
---|
| 1171 | } |
---|
| 1172 | |
---|
| 1173 | if ( cluster[cluster_id].procs == 2 ) break; |
---|
| 1174 | |
---|
| 1175 | icu[ICU_MASK_SET + 2*ICU_SPAN] = 0x00300000; // ICU_MASK for proc 2 |
---|
| 1176 | if ( _scheduler[cluster_id*NB_PROCS + 2].tasks > 1 ) |
---|
| 1177 | { |
---|
| 1178 | timer[TIMER_PERIOD + 2*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
| 1179 | timer[TIMER_MODE + 2*TIMER_SPAN] = 0x3; |
---|
| 1180 | } |
---|
| 1181 | |
---|
| 1182 | if ( cluster[cluster_id].procs == 3 ) break; |
---|
| 1183 | |
---|
| 1184 | icu[ICU_MASK_SET + 3*ICU_SPAN] = 0x00C00000; // ICU_MASK for proc 3 |
---|
| 1185 | if ( _scheduler[cluster_id*NB_PROCS + 3].tasks > 1 ) |
---|
| 1186 | { |
---|
| 1187 | timer[TIMER_PERIOD + 3*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
| 1188 | timer[TIMER_MODE + 3*TIMER_SPAN] = 0x3; |
---|
| 1189 | } |
---|
| 1190 | |
---|
| 1191 | if ( cluster[cluster_id].procs == 4 ) break; |
---|
| 1192 | icu[ICU_MASK_SET + 4*ICU_SPAN] = 0x03000000; // ICU_MASK for proc 4 |
---|
| 1193 | |
---|
| 1194 | if ( _scheduler[cluster_id*NB_PROCS + 4].tasks > 1 ) |
---|
| 1195 | { |
---|
| 1196 | timer[TIMER_PERIOD + 4*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
| 1197 | timer[TIMER_MODE + 4*TIMER_SPAN] = 0x3; |
---|
| 1198 | } |
---|
| 1199 | |
---|
| 1200 | if ( cluster[cluster_id].procs == 5 ) break; |
---|
| 1201 | |
---|
| 1202 | icu[ICU_MASK_SET + 5*ICU_SPAN] = 0x0C000000; // ICU_MASK for proc 5 |
---|
| 1203 | if ( _scheduler[cluster_id*NB_PROCS + 5].tasks > 1 ) |
---|
| 1204 | { |
---|
| 1205 | timer[TIMER_PERIOD + 5*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
| 1206 | timer[TIMER_MODE + 5*TIMER_SPAN] = 0x3; |
---|
| 1207 | } |
---|
| 1208 | |
---|
| 1209 | if ( cluster[cluster_id].procs == 6 ) break; |
---|
| 1210 | |
---|
| 1211 | icu[ICU_MASK_SET + 6*ICU_SPAN] = 0x30000000; // ICU_MASK for proc 6 |
---|
| 1212 | if ( _scheduler[cluster_id*NB_PROCS + 6].tasks > 1 ) |
---|
| 1213 | { |
---|
| 1214 | timer[TIMER_PERIOD + 6*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
| 1215 | timer[TIMER_MODE + 6*TIMER_SPAN] = 0x3; |
---|
| 1216 | } |
---|
| 1217 | |
---|
| 1218 | if ( cluster[cluster_id].procs == 7 ) break; |
---|
| 1219 | |
---|
| 1220 | icu[ICU_MASK_SET + 7*ICU_SPAN] = 0xC0000000; // ICU_MASK for proc 7 |
---|
| 1221 | if ( _scheduler[cluster_id*NB_PROCS + 7].tasks > 1 ) |
---|
| 1222 | { |
---|
| 1223 | timer[TIMER_PERIOD + 7*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
| 1224 | timer[TIMER_MODE + 7*TIMER_SPAN] = 0x3; |
---|
| 1225 | } |
---|
| 1226 | |
---|
| 1227 | if ( cluster[cluster_id].procs > 8 ) |
---|
| 1228 | { |
---|
| 1229 | boot_tty_puts("\n[BOOT ERROR] The number of processors per cluster\n"); |
---|
| 1230 | boot_tty_puts(" cannot be larger than 8\n"); |
---|
| 1231 | boot_exit(); |
---|
| 1232 | } |
---|
| 1233 | icu = icu + (CLUSTER_SPAN>>2); |
---|
| 1234 | timer = timer + (CLUSTER_SPAN>>2); |
---|
| 1235 | } |
---|
| 1236 | } // end boot_peri_init() |
---|
| 1237 | |
---|
| 1238 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1239 | // boot_init() |
---|
| 1240 | // This function is executed by one single processor to initialize the page |
---|
| 1241 | // tables, the tasks contexts and the peripherals, for all applications. |
---|
| 1242 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1243 | in_boot void boot_init() |
---|
| 1244 | { |
---|
| 1245 | // checking mapping_info |
---|
| 1246 | boot_check_mapping(); |
---|
| 1247 | |
---|
| 1248 | // building page tables |
---|
| 1249 | boot_pt_init(); |
---|
| 1250 | boot_tty_puts("\n[BOOT] Page Tables completed at cycle "); |
---|
| 1251 | boot_tty_putw( boot_time() ); |
---|
| 1252 | boot_tty_puts("\n"); |
---|
| 1253 | |
---|
| 1254 | // building tasks contexts |
---|
| 1255 | boot_tcg_init(); |
---|
| 1256 | boot_tty_puts("\n[BOOT] Task Contexts completed at cycle "); |
---|
| 1257 | boot_tty_putw( boot_time() ); |
---|
| 1258 | boot_tty_puts("\n"); |
---|
| 1259 | |
---|
| 1260 | // Initialize peripherals |
---|
| 1261 | boot_peri_init(); |
---|
| 1262 | boot_tty_puts("\n[BOOT] Peripherals completed at cycle "); |
---|
| 1263 | boot_tty_putw( boot_time() ); |
---|
| 1264 | boot_tty_puts("\n"); |
---|
| 1265 | |
---|
| 1266 | // signals completion to all processors |
---|
| 1267 | boot_mapping_done(); |
---|
| 1268 | |
---|
| 1269 | } // end boot_init() |
---|
| 1270 | |
---|
| 1271 | // Local Variables: |
---|
| 1272 | // tab-width: 4 |
---|
| 1273 | // c-basic-offset: 4 |
---|
| 1274 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
---|
| 1275 | // indent-tabs-mode: nil |
---|
| 1276 | // End: |
---|
| 1277 | |
---|
| 1278 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
---|
| 1279 | |
---|