| 1 | /////////////////////////////////////////////////////////////////////////// |
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| 2 | // File : irq_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 | |
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| 8 | #include <giet_config.h> |
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| 9 | #include <irq_handler.h> |
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| 10 | #include <sys_handler.h> |
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| 11 | #include <ctx_handler.h> |
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| 12 | #include <tim_driver.h> |
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| 13 | #include <xcu_driver.h> |
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| 14 | #include <pic_driver.h> |
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| 15 | #include <tty_driver.h> |
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| 16 | #include <nic_driver.h> |
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| 17 | #include <cma_driver.h> |
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| 18 | #include <mmc_driver.h> |
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| 19 | #include <bdv_driver.h> |
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| 20 | #include <hba_driver.h> |
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| 21 | #include <dma_driver.h> |
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| 22 | #include <sdc_driver.h> |
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| 23 | #include <mwr_driver.h> |
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| 24 | #include <mapping_info.h> |
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| 25 | #include <utils.h> |
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| 26 | #include <tty0.h> |
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| 27 | |
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| 28 | ///////////////////////////////////////////////////////////////////////// |
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| 29 | // Global variables |
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| 30 | ///////////////////////////////////////////////////////////////////////// |
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| 31 | |
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| 32 | // array of external IRQ indexes for each (isr/channel) couple |
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| 33 | __attribute__((section(".kdata"))) |
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| 34 | unsigned char _ext_irq_index[GIET_ISR_TYPE_MAX][GIET_ISR_CHANNEL_MAX]; |
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| 35 | |
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| 36 | // WTI mailbox allocators for external IRQ routing (3 allocators per proc) |
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| 37 | __attribute__((section(".kdata"))) |
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| 38 | unsigned char _wti_alloc_one[X_SIZE][Y_SIZE][NB_PROCS_MAX]; |
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| 39 | __attribute__((section(".kdata"))) |
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| 40 | unsigned char _wti_alloc_two[X_SIZE][Y_SIZE][NB_PROCS_MAX]; |
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| 41 | __attribute__((section(".kdata"))) |
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| 42 | unsigned char _wti_alloc_ter[X_SIZE][Y_SIZE][NB_PROCS_MAX]; |
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| 43 | |
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| 44 | ///////////////////////////////////////////////////////////////////////// |
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| 45 | // this array is allocated in the boot.c or kernel_init.c |
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| 46 | ///////////////////////////////////////////////////////////////////////// |
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| 47 | |
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| 48 | extern static_scheduler_t* _schedulers[X_SIZE][Y_SIZE][NB_PROCS_MAX]; |
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| 49 | |
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| 50 | ///////////////////////////////////////////////////////////////////////// |
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| 51 | // These ISR_TYPE names for display must be consistent with values in |
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| 52 | // irq_handler.h / mapping.py / xml_driver.c |
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| 53 | ///////////////////////////////////////////////////////////////////////// |
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| 54 | |
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| 55 | __attribute__((section(".kdata"))) |
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| 56 | char* _isr_type_str[] = { "DEFAULT", |
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| 57 | "TICK" , |
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| 58 | "TTY_RX" , |
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| 59 | "TTY_TX" , |
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| 60 | "BDV" , |
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| 61 | "TIMER" , |
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| 62 | "WAKUP" , |
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| 63 | "NIC_RX" , |
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| 64 | "NIC_TX" , |
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| 65 | "CMA" , |
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| 66 | "MMC" , |
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| 67 | "DMA" , |
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| 68 | "SPI" , |
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| 69 | "MWR" , |
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| 70 | "HBA" }; |
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| 71 | |
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| 72 | __attribute__((section(".kdata"))) |
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| 73 | char* _irq_type_str[] = { "HWI", |
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| 74 | "WTI", |
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| 75 | "PTI" }; |
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| 76 | |
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| 77 | //////////////////// |
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| 78 | void _ext_irq_init() |
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| 79 | { |
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| 80 | mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE; |
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| 81 | mapping_cluster_t* cluster = _get_cluster_base(header); |
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| 82 | mapping_periph_t* periph = _get_periph_base(header); |
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| 83 | mapping_irq_t* irq = _get_irq_base(header); |
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| 84 | unsigned int periph_id; // peripheral index in mapping_info |
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| 85 | unsigned int irq_id; // irq index in mapping_info |
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| 86 | |
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| 87 | // get cluster_io index in mapping |
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| 88 | unsigned int x_io = header->x_io; |
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| 89 | unsigned int y_io = header->y_io; |
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| 90 | unsigned int cluster_io = (x_io * Y_SIZE) + y_io; |
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| 91 | mapping_periph_t* pic = NULL; |
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| 92 | |
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| 93 | // scan external peripherals to find PIC |
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| 94 | unsigned int min = cluster[cluster_io].periph_offset ; |
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| 95 | unsigned int max = min + cluster[cluster_io].periphs ; |
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| 96 | |
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| 97 | for ( periph_id = min ; periph_id < max ; periph_id++ ) |
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| 98 | { |
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| 99 | if ( periph[periph_id].type == PERIPH_TYPE_PIC ) |
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| 100 | { |
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| 101 | pic = &periph[periph_id]; |
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| 102 | break; |
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| 103 | } |
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| 104 | } |
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| 105 | |
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| 106 | if ( pic == NULL ) |
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| 107 | { |
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| 108 | _printf("\n[GIET ERROR] in _ext_irq_init() : No PIC component found\n"); |
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| 109 | _exit(); |
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| 110 | } |
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| 111 | |
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| 112 | // scan PIC IRQS defined in mapping |
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| 113 | for ( irq_id = pic->irq_offset ; |
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| 114 | irq_id < pic->irq_offset + pic->irqs ; |
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| 115 | irq_id++ ) |
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| 116 | { |
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| 117 | unsigned int type = irq[irq_id].srctype; |
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| 118 | unsigned int srcid = irq[irq_id].srcid; |
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| 119 | unsigned int isr = irq[irq_id].isr; |
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| 120 | unsigned int channel = irq[irq_id].channel; |
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| 121 | |
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| 122 | if ( (type != IRQ_TYPE_HWI) || |
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| 123 | (srcid > 31) || |
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| 124 | (isr >= GIET_ISR_TYPE_MAX) || |
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| 125 | (channel >= GIET_ISR_CHANNEL_MAX) ) |
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| 126 | { |
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| 127 | _printf("\n[GIET ERROR] in _ext_irq_init() : Bad PIC IRQ\n" |
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| 128 | " type = %d / srcid = %d / isr = %d / channel = %d\n", |
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| 129 | type , srcid , isr , channel ); |
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| 130 | _exit(); |
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| 131 | } |
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| 132 | _ext_irq_index[isr][channel] = srcid; |
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| 133 | } |
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| 134 | } // end _ext_irq_init() |
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| 135 | |
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| 136 | //////////////////////////////////////////// |
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| 137 | void _ext_irq_alloc( unsigned int isr_type, |
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| 138 | unsigned int isr_channel, |
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| 139 | unsigned int* wti_index ) |
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| 140 | { |
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| 141 | unsigned int wti_id; // allocated WTI mailbox index in XCU |
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| 142 | unsigned int irq_id; // external IRQ index in PIC (input) |
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| 143 | unsigned int wti_addr; // WTI mailbox physical address (32 lsb bits) |
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| 144 | |
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| 145 | // check arguments |
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| 146 | if ( isr_type >= GIET_ISR_TYPE_MAX ) |
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| 147 | { |
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| 148 | _printf("\n[GIET ERROR] in _ext_irq_alloc() : illegal ISR type\n"); |
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| 149 | _exit(); |
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| 150 | } |
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| 151 | if ( isr_channel >= GIET_ISR_CHANNEL_MAX ) |
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| 152 | { |
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| 153 | _printf("\n[GIET ERROR] in _ext_irq_alloc() : illegal ISR channel\n"); |
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| 154 | _exit(); |
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| 155 | } |
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| 156 | |
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| 157 | // get processor coordinates [x,y,p] |
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| 158 | unsigned int gpid = _get_procid(); |
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| 159 | unsigned int cluster_xy = gpid >> P_WIDTH; |
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| 160 | unsigned int x = cluster_xy >> Y_WIDTH; |
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| 161 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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| 162 | unsigned int p = gpid & ((1<<P_WIDTH)-1); |
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| 163 | |
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| 164 | // allocate a WTI mailbox to proc[x,y,p] (blocking until success) |
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| 165 | while ( 1 ) |
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| 166 | { |
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| 167 | if ( _wti_alloc_one[x][y][p] == 0 ) |
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| 168 | { |
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| 169 | _wti_alloc_one[x][y][p] = 1; |
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| 170 | wti_id = p + NB_PROCS_MAX; |
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| 171 | break; |
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| 172 | } |
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| 173 | if ( _wti_alloc_two[x][y][p] == 0 ) |
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| 174 | { |
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| 175 | _wti_alloc_two[x][y][p] = 1; |
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| 176 | wti_id = p + 2*NB_PROCS_MAX; |
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| 177 | break; |
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| 178 | } |
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| 179 | if ( _wti_alloc_ter[x][y][p] == 0 ) |
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| 180 | { |
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| 181 | _wti_alloc_ter[x][y][p] = 1; |
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| 182 | wti_id = p + 3*NB_PROCS_MAX; |
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| 183 | break; |
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| 184 | } |
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| 185 | } |
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| 186 | *wti_index = wti_id; |
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| 187 | |
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| 188 | // register the mailbox physical address in IOPIC |
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| 189 | irq_id = _ext_irq_index[isr_type][isr_channel]; |
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| 190 | _xcu_get_wti_address( wti_id , &wti_addr ); |
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| 191 | _pic_init( irq_id , wti_addr, cluster_xy ); |
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| 192 | |
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| 193 | // initializes the WTI interrupt vector entry for target XCU |
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| 194 | static_scheduler_t* psched = (static_scheduler_t*)_get_sched(); |
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| 195 | psched->wti_vector[wti_id] = isr_channel<<16 | isr_type; |
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| 196 | |
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| 197 | #if GIET_DEBUG_IRQS |
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| 198 | _printf("\n[DEBUG IRQS] _ext_irq_alloc() for P[%d,%d,%d] at cycle %d\n" |
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| 199 | " wti_id = %d / isr_type = %s / channel = %d / pic_input = %d\n", |
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| 200 | x , y , p , _get_proctime() , |
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| 201 | wti_id , _isr_type_str[isr_type] , isr_channel , irq_id ); |
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| 202 | #endif |
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| 203 | |
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| 204 | } // end ext_irq_alloc() |
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| 205 | |
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| 206 | //////////////////////////////////////////// |
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| 207 | void _ext_irq_release( unsigned int isr_type, |
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| 208 | unsigned int isr_channel, |
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| 209 | unsigned int wti_index ) |
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| 210 | { |
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| 211 | unsigned int irq_id; // external IRQ index in PIC (input) |
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| 212 | |
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| 213 | // get processor coordinates [x,y,p] |
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| 214 | unsigned int gpid = _get_procid(); |
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| 215 | unsigned int cluster_xy = gpid >> P_WIDTH; |
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| 216 | unsigned int x = cluster_xy >> Y_WIDTH; |
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| 217 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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| 218 | unsigned int p = gpid & ((1<<P_WIDTH)-1); |
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| 219 | |
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| 220 | // check arguments |
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| 221 | if ( isr_type >= GIET_ISR_TYPE_MAX ) |
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| 222 | { |
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| 223 | _printf("\n[GIET ERROR] in _ext_irq_release() illegal ISR type\n"); |
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| 224 | _exit(); |
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| 225 | } |
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| 226 | if ( isr_channel >= GIET_ISR_CHANNEL_MAX ) |
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| 227 | { |
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| 228 | _printf("\n[GIET ERROR] in _ext_irq_release() : illegal ISR channel\n"); |
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| 229 | _exit(); |
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| 230 | } |
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| 231 | |
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| 232 | // desactivates dynamically allocated PIC entry |
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| 233 | irq_id = _ext_irq_index[isr_type][isr_channel]; |
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| 234 | _pic_set_register( irq_id , IOPIC_MASK , 0 ); |
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| 235 | |
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| 236 | // releases dynamically allocated WTI mailbox |
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| 237 | if ( wti_index == p + NB_PROCS_MAX ) _wti_alloc_one[x][y][p] = 0; |
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| 238 | else if ( wti_index == p + 2*NB_PROCS_MAX ) _wti_alloc_two[x][y][p] = 0; |
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| 239 | else if ( wti_index == p + 3*NB_PROCS_MAX ) _wti_alloc_ter[x][y][p] = 0; |
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| 240 | else |
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| 241 | { |
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| 242 | _printf("\n[GIET ERROR] in _ext_irq_release() : illegal WTI index\n"); |
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| 243 | _exit(); |
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| 244 | } |
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| 245 | } // end ext_irq_release() |
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| 246 | |
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| 247 | ///////////////// |
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| 248 | void _irq_demux() |
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| 249 | { |
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| 250 | unsigned int gpid = _get_procid(); |
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| 251 | unsigned int cluster_xy = gpid >> P_WIDTH; |
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| 252 | unsigned int x = cluster_xy >> Y_WIDTH; |
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| 253 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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| 254 | unsigned int p = gpid & ((1<<P_WIDTH)-1); |
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| 255 | unsigned int irq_id; |
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| 256 | unsigned int irq_type; |
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| 257 | |
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| 258 | // get the highest priority active IRQ index |
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| 259 | unsigned int icu_out_index = p * IRQ_PER_PROCESSOR; |
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| 260 | |
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| 261 | _xcu_get_index( cluster_xy, icu_out_index, &irq_id, &irq_type ); |
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| 262 | |
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| 263 | if (irq_id < 32) |
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| 264 | { |
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| 265 | static_scheduler_t* psched = (static_scheduler_t*)_get_sched(); |
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| 266 | unsigned int entry = 0; |
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| 267 | unsigned int isr_type; |
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| 268 | unsigned int channel; |
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| 269 | |
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| 270 | if (irq_type == IRQ_TYPE_HWI) entry = psched->hwi_vector[irq_id]; |
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| 271 | else if (irq_type == IRQ_TYPE_PTI) entry = psched->pti_vector[irq_id]; |
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| 272 | else if (irq_type == IRQ_TYPE_WTI) entry = psched->wti_vector[irq_id]; |
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| 273 | else |
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| 274 | { |
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| 275 | _printf("\n[GIET ERROR] illegal irq_type in irq_demux()\n"); |
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| 276 | _exit(); |
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| 277 | } |
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| 278 | |
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| 279 | isr_type = (entry ) & 0x0000FFFF; |
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| 280 | channel = (entry>>16) & 0x00007FFF; |
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| 281 | |
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| 282 | #if GIET_DEBUG_IRQS // we don't take the TTY lock to avoid deadlocks |
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| 283 | _nolock_printf("\n[DEBUG IRQS] _irq_demux() Processor[%d,%d,%d] enters at cycle %d\n" |
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| 284 | " irq_type = %s / irq_id = %d / isr_type = %s / channel = %d\n", |
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| 285 | x , y , p , _get_proctime() , |
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| 286 | _irq_type_str[irq_type] , irq_id , _isr_type_str[isr_type] , channel ); |
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| 287 | #endif |
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| 288 | |
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| 289 | // ISR call |
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| 290 | if ( isr_type == ISR_TICK ) _isr_tick ( irq_type, irq_id, channel ); |
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| 291 | else if ( isr_type == ISR_TTY_RX ) _tty_rx_isr ( irq_type, irq_id, channel ); |
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| 292 | else if ( isr_type == ISR_TTY_TX ) _tty_tx_isr ( irq_type, irq_id, channel ); |
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| 293 | else if ( isr_type == ISR_BDV ) _bdv_isr ( irq_type, irq_id, channel ); |
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| 294 | else if ( isr_type == ISR_TIMER ) _timer_isr ( irq_type, irq_id, channel ); |
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| 295 | else if ( isr_type == ISR_WAKUP ) _isr_wakup ( irq_type, irq_id, channel ); |
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| 296 | else if ( isr_type == ISR_NIC_RX ) _nic_rx_isr ( irq_type, irq_id, channel ); |
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| 297 | else if ( isr_type == ISR_NIC_TX ) _nic_tx_isr ( irq_type, irq_id, channel ); |
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| 298 | else if ( isr_type == ISR_CMA ) _cma_isr ( irq_type, irq_id, channel ); |
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| 299 | else if ( isr_type == ISR_MMC ) _mmc_isr ( irq_type, irq_id, channel ); |
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| 300 | else if ( isr_type == ISR_DMA ) _dma_isr ( irq_type, irq_id, channel ); |
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| 301 | else if ( isr_type == ISR_SDC ) _sdc_isr ( irq_type, irq_id, channel ); |
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| 302 | else if ( isr_type == ISR_MWR ) _mwr_isr ( irq_type, irq_id, channel ); |
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| 303 | else if ( isr_type == ISR_HBA ) _hba_isr ( irq_type, irq_id, channel ); |
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| 304 | else |
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| 305 | { |
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| 306 | _printf("\n[GIET ERROR] in _irq_demux() :" |
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| 307 | " illegal ISR type on processor[%d,%d,%d] at cycle %d\n" |
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| 308 | " - irq_type = %s\n" |
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| 309 | " - irq_id = %d\n" |
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| 310 | " - isr_type = %s\n", |
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| 311 | x, y, p, _get_proctime(), |
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| 312 | _irq_type_str[irq_type] , irq_id , _isr_type_str[isr_type] ); |
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| 313 | _exit(); |
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| 314 | } |
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| 315 | } |
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| 316 | else // no interrupt active |
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| 317 | { |
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| 318 | _isr_default(); |
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| 319 | } |
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| 320 | } |
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| 321 | |
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| 322 | /////////////////// |
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| 323 | void _isr_default() |
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| 324 | { |
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| 325 | unsigned int gpid = _get_procid(); |
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| 326 | unsigned int cluster_xy = gpid >> P_WIDTH; |
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| 327 | unsigned int x = cluster_xy >> Y_WIDTH; |
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| 328 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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| 329 | unsigned int p = gpid & ((1<<P_WIDTH)-1); |
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| 330 | |
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| 331 | _printf("\n[GIET WARNING] IRQ handler called but no active IRQ " |
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| 332 | "on processor[%d,%d,%d] at cycle %d\n", |
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| 333 | x, y, p, _get_proctime() ); |
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| 334 | } |
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| 335 | |
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| 336 | |
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| 337 | //////////////////////////////////////////////////////////// |
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| 338 | void _isr_wakup( unsigned int irq_type, // HWI / WTI / PTI |
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| 339 | unsigned int irq_id, // index returned by ICU |
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| 340 | unsigned int channel ) // unused |
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| 341 | { |
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| 342 | unsigned int gpid = _get_procid(); |
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| 343 | unsigned int cluster_xy = gpid >> P_WIDTH; |
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| 344 | unsigned int x = cluster_xy >> Y_WIDTH; |
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| 345 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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| 346 | unsigned int p = gpid & ((1<<P_WIDTH)-1); |
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| 347 | |
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| 348 | unsigned int value; // WTI mailbox value |
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| 349 | unsigned int save_sr; // save SR value in pre-empted task stack |
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| 350 | |
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| 351 | unsigned int ltid = _get_current_task_id(); |
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| 352 | |
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| 353 | if ( irq_type != IRQ_TYPE_WTI ) |
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| 354 | { |
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| 355 | _printf("[GIET ERROR] P[%d,%d,%d] enters _isr_wakup() at cycle %d\n" |
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| 356 | " but not called by a WTI interrupt\n", |
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| 357 | x , y , p , _get_proctime() ); |
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| 358 | _exit(); |
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| 359 | } |
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| 360 | |
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| 361 | // get mailbox value and acknowledge WTI |
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| 362 | _xcu_get_wti_value( cluster_xy, irq_id, &value ); |
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| 363 | |
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| 364 | #if GIET_DEBUG_SWITCH |
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| 365 | _printf("\n[DEBUG SWITCH] P[%d,%d,%d] enters _isr_wakup() at cycle %d\n" |
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| 366 | " WTI index = %d / current ltid = %d / mailbox value = %x\n", |
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| 367 | x , y , p , _get_proctime() , irq_id , ltid , value ); |
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| 368 | #endif |
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| 369 | |
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| 370 | // enter critical section and swich context (if required) |
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| 371 | if ( (ltid == IDLE_TASK_INDEX) || (value != 0) ) |
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| 372 | { |
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| 373 | _it_disable( &save_sr ); |
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| 374 | _ctx_switch(); |
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| 375 | _it_restore( &save_sr ); |
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| 376 | } |
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| 377 | |
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| 378 | } // end _isr_wakup |
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| 379 | |
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| 380 | /////////////////////////////////////////////////////////// |
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| 381 | void _isr_tick( unsigned int irq_type, // HWI / WTI / PTI |
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| 382 | unsigned int irq_id, // index returned by ICU |
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| 383 | unsigned int channel ) // channel index if HWI |
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| 384 | { |
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| 385 | unsigned int gpid = _get_procid(); |
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| 386 | unsigned int cluster_xy = gpid >> P_WIDTH; |
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| 387 | unsigned int x = cluster_xy >> Y_WIDTH; |
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| 388 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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| 389 | unsigned int p = gpid & ((1<<P_WIDTH)-1); |
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| 390 | |
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| 391 | unsigned int save_sr; // save SR value in pre-empted task stack |
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| 392 | |
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| 393 | if ( irq_type != IRQ_TYPE_PTI ) |
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| 394 | { |
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| 395 | _printf("[GIET ERROR] P[%d,%d,%d] enters _isr_tick() at cycle %d\n" |
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| 396 | " but not called by a PTI interrupt\n", |
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| 397 | x , y , p , _get_proctime() ); |
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| 398 | _exit(); |
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| 399 | } |
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| 400 | |
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| 401 | // acknowledge PTI |
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| 402 | _xcu_timer_reset_irq( cluster_xy, irq_id ); |
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| 403 | |
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| 404 | #if GIET_DEBUG_SWITCH |
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| 405 | unsigned int ltid = _get_current_task_id(); |
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| 406 | _printf("\n[DEBUG SWITCH] P[%d,%d,%d] enters _isr_tick() at cycle %d\n" |
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| 407 | " WTI index = %d / current ltid = %d\n", |
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| 408 | x , y , p , _get_proctime() , irq_id , ltid ); |
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| 409 | #endif |
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| 410 | |
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| 411 | // enter critical section and switch context |
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| 412 | _it_disable( &save_sr ); |
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| 413 | _ctx_switch(); |
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| 414 | _it_restore( &save_sr ); |
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| 415 | |
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| 416 | } // end _isr_tick |
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| 417 | |
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| 418 | |
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| 419 | // Local Variables: |
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| 420 | // tab-width: 4 |
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| 421 | // c-basic-offset: 4 |
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| 422 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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| 423 | // indent-tabs-mode: nil |
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| 424 | // End: |
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| 425 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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| 426 | |
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