[158] | 1 | ////////////////////////////////////////////////////////////////////////////////// |
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| 2 | // File : stdio.c |
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| 3 | // Date : 01/04/2010 |
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| 4 | // Author : alain greiner & Joel Porquet |
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| 5 | // Copyright (c) UPMC-LIP6 |
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| 6 | /////////////////////////////////////////////////////////////////////////////////// |
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[203] | 7 | // The stdio.c and stdio.h files are part of the GIET_VM nano-kernel. |
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[158] | 8 | // This library contains all user-level functions that contain a system call |
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| 9 | // to access protected or shared ressources. |
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| 10 | /////////////////////////////////////////////////////////////////////////////////// |
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| 11 | |
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| 12 | #include <stdarg.h> |
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| 13 | #include <stdio.h> |
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| 14 | |
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| 15 | #define SYSCALL_PROCID 0x00 |
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| 16 | #define SYSCALL_PROCTIME 0x01 |
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| 17 | #define SYSCALL_TTY_WRITE 0x02 |
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| 18 | #define SYSCALL_TTY_READ 0x03 |
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[203] | 19 | #define SYSCALL_TIMER_START 0x04 |
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| 20 | #define SYSCALL_TIMER_STOP 0x05 |
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[158] | 21 | #define SYSCALL_GCD_WRITE 0x06 |
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| 22 | #define SYSCALL_GCD_READ 0x07 |
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[232] | 23 | #define SYSCALL_HEAP_INFO 0x08 |
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| 24 | #define SYSCALL_PROC_TASK_ID 0x09 |
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| 25 | #define SYSCALL_GLOBAL_TASK_ID 0x0A |
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[158] | 26 | #define SYSCALL_CTX_SWITCH 0x0D |
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| 27 | #define SYSCALL_EXIT 0x0E |
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| 28 | #define SYSCALL_PROC_NUMBER 0x0F |
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| 29 | #define SYSCALL_FB_SYNC_WRITE 0x10 |
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| 30 | #define SYSCALL_FB_SYNC_READ 0x11 |
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| 31 | #define SYSCALL_FB_WRITE 0x12 |
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| 32 | #define SYSCALL_FB_READ 0x13 |
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| 33 | #define SYSCALL_FB_COMPLETED 0x14 |
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| 34 | #define SYSCALL_IOC_WRITE 0x15 |
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| 35 | #define SYSCALL_IOC_READ 0x16 |
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| 36 | #define SYSCALL_IOC_COMPLETED 0x17 |
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[228] | 37 | #define SYSCALL_VOBJ_GET_VBASE 0x1A |
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[218] | 38 | #define SYSCALL_NIC_WRITE 0x1B |
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| 39 | #define SYSCALL_NIC_READ 0x1C |
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| 40 | #define SYSCALL_NIC_COMPLETED 0x1D |
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[158] | 41 | |
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| 42 | ////////////////////////////////////////////////////////////////////////////////// |
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[165] | 43 | // sys_call() |
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[158] | 44 | // This generic C function is used to implement all system calls. |
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[165] | 45 | // It writes the system call arguments in the proper registers, |
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| 46 | // and tells GCC what has been modified by system call execution. |
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[158] | 47 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 48 | static inline unsigned int sys_call(unsigned int call_no, |
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| 49 | unsigned int arg_0, |
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| 50 | unsigned int arg_1, |
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| 51 | unsigned int arg_2, |
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| 52 | unsigned int arg_3) { |
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[158] | 53 | register unsigned int reg_no_and_output asm("v0") = call_no; |
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[228] | 54 | register unsigned int reg_a0 asm("a0") = arg_0; |
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| 55 | register unsigned int reg_a1 asm("a1") = arg_1; |
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| 56 | register unsigned int reg_a2 asm("a2") = arg_2; |
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| 57 | register unsigned int reg_a3 asm("a3") = arg_3; |
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[158] | 58 | |
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| 59 | asm volatile( |
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| 60 | "syscall" |
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| 61 | : "=r" (reg_no_and_output) /* output argument */ |
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| 62 | : "r" (reg_a0), /* input arguments */ |
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[228] | 63 | "r" (reg_a1), |
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| 64 | "r" (reg_a2), |
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| 65 | "r" (reg_a3), |
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| 66 | "r" (reg_no_and_output) |
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[158] | 67 | : "memory", |
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| 68 | /* These persistant registers will be saved on the stack by the |
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| 69 | * compiler only if they contain relevant data. */ |
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| 70 | "at", |
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| 71 | "v1", |
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| 72 | "ra", |
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| 73 | "t0", |
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| 74 | "t1", |
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| 75 | "t2", |
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| 76 | "t3", |
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| 77 | "t4", |
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| 78 | "t5", |
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| 79 | "t6", |
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| 80 | "t7", |
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| 81 | "t8", |
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| 82 | "t9" |
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| 83 | ); |
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| 84 | return reg_no_and_output; |
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| 85 | } |
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| 86 | |
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[228] | 87 | ///// MIPS32 related system calls ///// |
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[158] | 88 | |
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| 89 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 90 | // giet_procid() |
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| 91 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 92 | // This function returns the processor identifier. |
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| 93 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 94 | unsigned int giet_procid() { |
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| 95 | return sys_call(SYSCALL_PROCID, 0, 0, 0, 0); |
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[158] | 96 | } |
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[228] | 97 | |
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| 98 | |
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[158] | 99 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 100 | // giet_proctime() |
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| 101 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 102 | // This function returns the local processor time (clock cycles since boot) |
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| 103 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 104 | unsigned int giet_proctime() { |
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| 105 | return sys_call(SYSCALL_PROCTIME, 0, 0, 0, 0); |
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[158] | 106 | } |
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| 107 | |
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| 108 | |
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[228] | 109 | ////// TTY device related system calls ///// |
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| 110 | |
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[158] | 111 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 112 | // giet_tty_putc() |
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| 113 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 114 | // This function displays a single ascii character on a terminal. |
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| 115 | // The terminal index must be defined in the task context in the boot phase. |
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| 116 | // It doesn't use the TTY_PUT_IRQ interrupt, and the associated kernel buffer. |
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| 117 | // - Returns 1 if the character has been written, 0 otherwise. |
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| 118 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 119 | unsigned int giet_tty_putc(char byte) { |
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| 120 | return sys_call(SYSCALL_TTY_WRITE, (unsigned int) (&byte), 1, 0, 0); |
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[158] | 121 | } |
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[228] | 122 | |
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| 123 | |
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[158] | 124 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 125 | // giet_tty_puts() |
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| 126 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 127 | // This function displays a string on a terminal. |
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| 128 | // The terminal index must be defined in the task context in the boot phase. |
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| 129 | // The string must be terminated by a NUL character. |
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| 130 | // It doesn't use the TTY_PUT_IRQ interrupt, and the associated kernel buffer. |
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| 131 | // - Returns the number of written characters. |
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| 132 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 133 | unsigned int giet_tty_puts(char * buf) { |
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[158] | 134 | unsigned int length = 0; |
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[228] | 135 | while (buf[length] != 0) { |
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[158] | 136 | length++; |
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| 137 | } |
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[228] | 138 | return sys_call(SYSCALL_TTY_WRITE, (unsigned int) buf, length, 0, 0); |
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[158] | 139 | } |
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[228] | 140 | |
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| 141 | |
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[158] | 142 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 143 | // giet_tty_putw() |
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| 144 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 145 | // This function displays the value of a 32-bit word with decimal characters. |
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| 146 | // The terminal index must be defined in the task context in the boot phase. |
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| 147 | // It doesn't use the TTY_PUT_IRQ interrupt, and the associated kernel buffer. |
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| 148 | // Returns the number of written characters (should be equal to ten). |
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| 149 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 150 | unsigned int giet_tty_putw(unsigned int val) { |
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[158] | 151 | char buf[10]; |
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| 152 | unsigned int i; |
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[228] | 153 | for (i = 0; i < 10; i++) { |
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| 154 | buf[9 - i] = (val % 10) + 0x30; |
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[158] | 155 | val = val / 10; |
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| 156 | } |
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[228] | 157 | return sys_call(SYSCALL_TTY_WRITE, (unsigned int) buf, 10, 0, 0); |
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[158] | 158 | } |
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[228] | 159 | |
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| 160 | |
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[158] | 161 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 162 | // giet_tty_getc() |
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| 163 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 164 | // This blocking function fetches a single ascii character from a terminal. |
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| 165 | // The terminal index must be defined in the task context in the boot phase. |
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| 166 | // It uses the IRQ_GET interrupt, and the associated kernel buffer. |
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| 167 | // - Returns 0 when completed. |
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| 168 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 169 | unsigned int giet_tty_getc(char * byte) { |
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[158] | 170 | unsigned int ret = 0; |
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[228] | 171 | while (ret == 0) { |
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| 172 | ret = sys_call(SYSCALL_TTY_READ, (unsigned int)byte, 1, 0, 0); |
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[158] | 173 | } |
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| 174 | return 0; |
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| 175 | } |
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[228] | 176 | |
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| 177 | |
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[158] | 178 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 179 | // giet_tty_gets() |
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| 180 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 181 | // This blocking function fetches a string from a terminal to a fixed length buffer. |
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| 182 | // The terminal index must be defined in the task context in the boot phase. |
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| 183 | // It uses the TTY_GET_IRQ interrupt, anf the associated kernel buffer. |
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| 184 | // - Returns 0 when completed. |
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| 185 | // - Up to (bufsize - 1) characters (including the non printable characters) |
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| 186 | // will be copied into buffer, and the string is always completed by a NUL |
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| 187 | // character. |
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| 188 | // - The <LF> character is interpreted, as the function close the string with a |
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| 189 | // NUL character if <LF> is read. |
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| 190 | // - The <DEL> character is interpreted, and the corresponding character(s) are |
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| 191 | // removed from the target buffer. |
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| 192 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 193 | unsigned int giet_tty_gets(char * buf, unsigned int bufsize) { |
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[158] | 194 | unsigned int ret; |
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| 195 | unsigned char byte; |
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| 196 | unsigned int index = 0; |
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| 197 | |
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[228] | 198 | while (index < (bufsize - 1)) { |
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[158] | 199 | do { |
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[228] | 200 | ret = sys_call(SYSCALL_TTY_READ, (unsigned int) (&byte), 1, 0, 0); |
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[158] | 201 | } while (ret != 1); |
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| 202 | |
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[228] | 203 | if (byte == 0x0A) { |
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[158] | 204 | break; /* LF */ |
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[228] | 205 | } |
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| 206 | else if ((byte == 0x7F) && (index > 0)) { |
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[158] | 207 | index--; /* DEL */ |
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[228] | 208 | } |
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| 209 | else { |
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[158] | 210 | buf[index] = byte; |
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| 211 | index++; |
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| 212 | } |
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| 213 | } |
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| 214 | buf[index] = 0; |
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| 215 | return 0; |
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| 216 | } |
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[228] | 217 | |
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| 218 | |
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[158] | 219 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 220 | // giet_tty_getw() |
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| 221 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 222 | // This blocking function fetches a string of decimal characters (most |
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| 223 | // significant digit first) to build a 32-bit unsigned integer. |
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| 224 | // The terminal index must be defined in the task context in the boot phase. |
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| 225 | // It uses the TTY_GET_IRQ interrupt, anf the associated kernel buffer. |
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| 226 | // - Returns necessarily 0 when completed. |
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| 227 | // |
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| 228 | // - The non-blocking system function _tty_read_irq is called several times, |
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| 229 | // and the decimal characters are written in a 32 characters buffer until a |
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| 230 | // <LF> character is read. |
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| 231 | // - The <DEL> character is interpreted, and previous characters can be |
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| 232 | // cancelled. All others characters are ignored. |
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| 233 | // - When the <LF> character is received, the string is converted to an |
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| 234 | // unsigned int value. If the number of decimal digit is too large for the 32 |
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| 235 | // bits range, the zero value is returned. |
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| 236 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 237 | unsigned int giet_tty_getw(unsigned int * val) { |
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[158] | 238 | unsigned char buf[32]; |
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| 239 | unsigned char byte; |
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| 240 | unsigned int save = 0; |
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| 241 | unsigned int dec = 0; |
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| 242 | unsigned int done = 0; |
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| 243 | unsigned int overflow = 0; |
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| 244 | unsigned int max = 0; |
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| 245 | unsigned int i; |
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| 246 | unsigned int ret; |
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| 247 | |
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[228] | 248 | while (done == 0) { |
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[158] | 249 | do { |
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[228] | 250 | ret = sys_call(SYSCALL_TTY_READ, (unsigned int) (&byte), 1, 0, 0); |
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[158] | 251 | } while (ret != 1); |
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| 252 | |
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[228] | 253 | if ((byte > 0x2F) && (byte < 0x3A)) { |
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| 254 | /* decimal character */ |
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[158] | 255 | buf[max] = byte; |
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| 256 | max++; |
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[165] | 257 | giet_tty_putc(byte); |
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[158] | 258 | } |
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[228] | 259 | else if ((byte == 0x0A) || (byte == 0x0D)) { |
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| 260 | /* LF or CR character */ |
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[158] | 261 | done = 1; |
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| 262 | } |
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[228] | 263 | else if (byte == 0x7F) { |
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| 264 | /* DEL character */ |
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| 265 | if (max > 0) { |
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[158] | 266 | max--; /* cancel the character */ |
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[165] | 267 | giet_tty_putc(0x08); |
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| 268 | giet_tty_putc(0x20); |
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| 269 | giet_tty_putc(0x08); |
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[158] | 270 | } |
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| 271 | } |
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[228] | 272 | if (max == 32) { |
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| 273 | /* decimal string overflow */ |
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| 274 | for (i = 0; i < max; i++) { |
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| 275 | /* cancel the string */ |
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[165] | 276 | giet_tty_putc(0x08); |
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| 277 | giet_tty_putc(0x20); |
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| 278 | giet_tty_putc(0x08); |
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[158] | 279 | } |
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[165] | 280 | giet_tty_putc(0x30); |
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[158] | 281 | *val = 0; /* return 0 value */ |
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| 282 | return 0; |
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| 283 | } |
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| 284 | } |
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| 285 | |
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| 286 | /* string conversion */ |
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[228] | 287 | for (i = 0; i < max; i++) { |
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[158] | 288 | dec = dec * 10 + (buf[i] - 0x30); |
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[228] | 289 | if (dec < save) { |
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[158] | 290 | overflow = 1; |
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[228] | 291 | } |
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[158] | 292 | save = dec; |
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| 293 | } |
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| 294 | |
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| 295 | /* check overflow */ |
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[228] | 296 | if (overflow == 0) { |
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[158] | 297 | *val = dec; /* return decimal value */ |
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| 298 | } |
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[228] | 299 | else { |
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| 300 | for (i = 0; i < max; i++) { |
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| 301 | /* cancel the string */ |
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[165] | 302 | giet_tty_putc(0x08); |
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| 303 | giet_tty_putc(0x20); |
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| 304 | giet_tty_putc(0x08); |
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[158] | 305 | } |
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[165] | 306 | giet_tty_putc(0x30); |
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[158] | 307 | *val = 0; /* return 0 value */ |
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| 308 | } |
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| 309 | return 0; |
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| 310 | } |
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[228] | 311 | |
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| 312 | |
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[158] | 313 | //////////////////////////////////////////////////////////////////////////////////// |
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[165] | 314 | // giet_tty_printf() |
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| 315 | //////////////////////////////////////////////////////////////////////////////////// |
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[158] | 316 | // This function is a simplified version of the mutek_printf() function. |
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| 317 | // The terminal index must be defined in the calling task context. |
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| 318 | // It doesn't use the IRQ_PUT interrupt, and the associated kernel buffer. |
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| 319 | // Only a limited number of formats are supported: |
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| 320 | // - %d : signed decimal |
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| 321 | // - %u : unsigned decimal |
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| 322 | // - %x : hexadecimal |
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| 323 | // - %c : char |
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| 324 | // - %s : string |
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| 325 | // - Returns 0 if success, > 0 if error. |
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| 326 | //////////////////////////////////////////////////////////////////////////////////// |
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[228] | 327 | unsigned int giet_tty_printf(char * format, ...) { |
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[158] | 328 | va_list ap; |
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| 329 | va_start(ap, format); |
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| 330 | unsigned int ret; |
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| 331 | |
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| 332 | printf_text: |
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| 333 | |
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| 334 | while (*format) { |
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| 335 | unsigned int i; |
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[228] | 336 | for (i = 0; format[i] && format[i] != '%'; i++); |
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[158] | 337 | if (i) { |
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[228] | 338 | ret = sys_call(SYSCALL_TTY_WRITE, (unsigned int) format, i, 0, 0); |
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| 339 | if (ret != i) { |
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[158] | 340 | return 1; /* return error */ |
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[228] | 341 | } |
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[158] | 342 | format += i; |
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| 343 | } |
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| 344 | if (*format == '%') { |
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| 345 | format++; |
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| 346 | goto printf_arguments; |
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| 347 | } |
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| 348 | } |
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| 349 | |
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| 350 | va_end(ap); |
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| 351 | return 0; |
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| 352 | |
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| 353 | printf_arguments: |
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| 354 | |
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| 355 | { |
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[228] | 356 | int val = va_arg(ap, long); |
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| 357 | char buf[20]; |
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| 358 | char * pbuf; |
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| 359 | unsigned int len = 0; |
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| 360 | static const char HexaTab[] = "0123456789ABCDEF"; |
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| 361 | unsigned int i; |
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[158] | 362 | |
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| 363 | switch (*format++) { |
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| 364 | case ('c'): /* char conversion */ |
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| 365 | len = 1; |
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| 366 | buf[0] = val; |
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| 367 | pbuf = buf; |
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| 368 | break; |
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| 369 | case ('d'): /* decimal signed integer */ |
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| 370 | if (val < 0) { |
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| 371 | val = -val; |
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[228] | 372 | ret = sys_call(SYSCALL_TTY_WRITE, (unsigned int)"-", 1, 0, 0); |
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| 373 | if (ret != 1) { |
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[158] | 374 | return 1; /* return error */ |
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[228] | 375 | } |
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[158] | 376 | } |
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| 377 | case ('u'): /* decimal unsigned integer */ |
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[228] | 378 | for(i = 0; i < 10; i++) { |
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| 379 | buf[9 - i] = HexaTab[val % 10]; |
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| 380 | if (!(val /= 10)) { |
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| 381 | break; |
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| 382 | } |
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[158] | 383 | } |
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[228] | 384 | len = i + 1; |
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| 385 | pbuf = &buf[9 - i]; |
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[158] | 386 | break; |
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| 387 | case ('x'): /* hexadecimal integer */ |
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[228] | 388 | ret = sys_call(SYSCALL_TTY_WRITE, (unsigned int) "0x", 2, 0, 0); |
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| 389 | if (ret != 2) { |
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[158] | 390 | return 1; /* return error */ |
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| 391 | } |
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[228] | 392 | for(i = 0; i < 8; i++) { |
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| 393 | buf[7 - i] = HexaTab[val % 16U]; |
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| 394 | if (!(val /= 16U)) { |
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| 395 | break; |
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| 396 | } |
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| 397 | } |
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| 398 | len = i + 1; |
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| 399 | pbuf = &buf[7 - i]; |
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[158] | 400 | break; |
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| 401 | case ('s'): /* string */ |
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| 402 | { |
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[228] | 403 | char * str = (char *) val; |
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| 404 | while (str[len]) { |
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| 405 | len++; |
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| 406 | } |
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| 407 | pbuf = (char *) val; |
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[158] | 408 | } |
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| 409 | break; |
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| 410 | default: |
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| 411 | goto printf_text; |
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| 412 | } |
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| 413 | |
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[228] | 414 | ret = sys_call(SYSCALL_TTY_WRITE, (unsigned int) pbuf, len, 0, 0); |
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| 415 | if (ret != len) { |
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[158] | 416 | return 1; |
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[228] | 417 | } |
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[158] | 418 | goto printf_text; |
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| 419 | } |
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| 420 | } |
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| 421 | |
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[203] | 422 | |
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| 423 | ///// TIMER related system calls ////// |
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| 424 | |
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| 425 | ////////////////////////////////////////////////////////////////////////////////// |
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| 426 | // giet_timer_start() |
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| 427 | ////////////////////////////////////////////////////////////////////////////////// |
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| 428 | // This function activates the private user timer allocated to the calling task |
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| 429 | // in the boot phase. |
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| 430 | // - Returns 0 if success, > 0 if error. |
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| 431 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 432 | unsigned int giet_timer_start() { |
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| 433 | return sys_call(SYSCALL_TIMER_START, 0, 0, 0, 0); |
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[203] | 434 | } |
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[228] | 435 | |
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| 436 | |
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[203] | 437 | ////////////////////////////////////////////////////////////////////////////////// |
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| 438 | // giet_timer_stop() |
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| 439 | ////////////////////////////////////////////////////////////////////////////////// |
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| 440 | // This function activates the user timer allocated to the calling task. |
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| 441 | // - Returns 0 if success, > 0 if error. |
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| 442 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 443 | unsigned int giet_timer_stop() { |
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| 444 | return sys_call(SYSCALL_TIMER_STOP, 0, 0, 0, 0); |
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[203] | 445 | } |
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| 446 | |
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[228] | 447 | |
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[165] | 448 | ///// GCD (Greatest Common Divider) related system calls |
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[158] | 449 | |
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| 450 | #define GCD_OPA 0 |
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| 451 | #define GCD_OPB 1 |
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| 452 | #define GCD_START 2 |
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| 453 | #define GCD_STATUS 3 |
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| 454 | |
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| 455 | ////////////////////////////////////////////////////////////////////////////////// |
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[165] | 456 | // giet_gcd_set_opa() |
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| 457 | ////////////////////////////////////////////////////////////////////////////////// |
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[158] | 458 | // This function sets the operand A in the GCD coprocessor. |
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| 459 | // - Returns 0 if success, > 0 if error. |
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| 460 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 461 | unsigned int giet_gcd_set_opa(unsigned int val) { |
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| 462 | return sys_call(SYSCALL_GCD_WRITE, GCD_OPA, val, 0, 0); |
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[158] | 463 | } |
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[228] | 464 | |
---|
| 465 | |
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[158] | 466 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 467 | // giet_gcd_set_opb() |
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[165] | 468 | ////////////////////////////////////////////////////////////////////////////////// |
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[158] | 469 | // This function sets operand B in the GCD coprocessor. |
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| 470 | // - Returns 0 if success, > 0 if error. |
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| 471 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 472 | unsigned int giet_gcd_set_opb(unsigned int val) { |
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| 473 | return sys_call(SYSCALL_GCD_WRITE, GCD_OPB, val, 0, 0); |
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[158] | 474 | } |
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[228] | 475 | |
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| 476 | |
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[158] | 477 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 478 | // giet_gcd_start() |
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[165] | 479 | ////////////////////////////////////////////////////////////////////////////////// |
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[158] | 480 | // This function starts the computation in the GCD coprocessor. |
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| 481 | // - Returns 0 if success, > 0 if error. |
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| 482 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 483 | unsigned int giet_gcd_start() { |
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| 484 | return sys_call(SYSCALL_GCD_WRITE, GCD_START, 0, 0, 0); |
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[158] | 485 | } |
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[228] | 486 | |
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| 487 | |
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[158] | 488 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 489 | // giet_gcd_get_status() |
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[165] | 490 | ////////////////////////////////////////////////////////////////////////////////// |
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[158] | 491 | // This function gets the status fromn the GCD coprocessor. |
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| 492 | // - The value is 0 when the coprocessor is idle (computation completed). |
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| 493 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 494 | unsigned int giet_gcd_get_status(unsigned int * val) { |
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| 495 | return sys_call(SYSCALL_GCD_READ, GCD_STATUS, (unsigned int) val, 0, 0); |
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[158] | 496 | } |
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[228] | 497 | |
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| 498 | |
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[158] | 499 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 500 | // giet_gcd_get_result() |
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[165] | 501 | ////////////////////////////////////////////////////////////////////////////////// |
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[158] | 502 | // This function gets the result of the computation from the GCD coprocessor. |
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| 503 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 504 | unsigned int giet_gcd_get_result(unsigned int * val) { |
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| 505 | return sys_call(SYSCALL_GCD_READ, GCD_OPA, (unsigned int) val, 0, 0); |
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[158] | 506 | } |
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| 507 | |
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[228] | 508 | |
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[158] | 509 | ///// Block device related system calls ///// |
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| 510 | |
---|
| 511 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 512 | // giet_ioc_write() |
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[165] | 513 | ////////////////////////////////////////////////////////////////////////////////// |
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[158] | 514 | // Transfer data from a memory buffer to a file on the block_device. |
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| 515 | // lba : Logical Block Address (first block index) |
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| 516 | // buffer : base address of the memory buffer |
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| 517 | // count : number of blocks to be transfered |
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| 518 | // - Returns 0 if success, > 0 if error (e.g. memory buffer not in user space). |
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| 519 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 520 | unsigned int giet_ioc_write( unsigned int lba, void * buffer, unsigned int count) { |
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| 521 | return sys_call(SYSCALL_IOC_WRITE, lba, (unsigned int) buffer, count, 0); |
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[158] | 522 | } |
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[228] | 523 | |
---|
| 524 | |
---|
[158] | 525 | ////////////////////////////////////////////////////////////////////////////////// |
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[165] | 526 | // giet_ioc_read() |
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| 527 | ////////////////////////////////////////////////////////////////////////////////// |
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[158] | 528 | // Transfer data from a file on the block_device to a memory buffer. |
---|
| 529 | // lba : Logical Block Address (first block index) |
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| 530 | // buffer : base address of the memory buffer |
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| 531 | // count : number of blocks to be transfered |
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| 532 | // - Returns 0 if success, > 0 if error (e.g. memory buffer not in user space). |
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| 533 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 534 | unsigned int giet_ioc_read(unsigned int lba, void * buffer, unsigned int count) { |
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| 535 | return sys_call(SYSCALL_IOC_READ, lba, (unsigned int) buffer, count, 0); |
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[158] | 536 | } |
---|
[228] | 537 | |
---|
| 538 | |
---|
[158] | 539 | ////////////////////////////////////////////////////////////////////////////////// |
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[165] | 540 | // giet_ioc_completed() |
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| 541 | ////////////////////////////////////////////////////////////////////////////////// |
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[158] | 542 | // This blocking function returns 0 when the I/O transfer is |
---|
| 543 | // successfully completed, and returns 1 if an address error has been detected. |
---|
| 544 | ////////////////////////////////////////////////////////////////////////////////// |
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[228] | 545 | unsigned int giet_ioc_completed() { |
---|
| 546 | return sys_call(SYSCALL_IOC_COMPLETED, 0, 0, 0, 0); |
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[158] | 547 | } |
---|
| 548 | |
---|
[228] | 549 | |
---|
[158] | 550 | ///// Frame buffer device related system calls ///// |
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| 551 | |
---|
| 552 | ////////////////////////////////////////////////////////////////////////////////// |
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[165] | 553 | // giet_fb_sync_write() |
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| 554 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[158] | 555 | // This blocking function use a memory copy strategy to transfer data from a |
---|
| 556 | // user buffer to the frame buffer device in kernel space. |
---|
| 557 | // offset : offset (in bytes) in the frame buffer |
---|
| 558 | // buffer : base address of the memory buffer |
---|
| 559 | // length : number of bytes to be transfered |
---|
| 560 | // - Returns 0 if success, > 0 if error (e.g. memory buffer not in user space). |
---|
| 561 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 562 | unsigned int giet_fb_sync_write(unsigned int offset, void * buffer, unsigned int length) { |
---|
| 563 | return sys_call(SYSCALL_FB_SYNC_WRITE, offset, (unsigned int) buffer, length, 0); |
---|
[158] | 564 | } |
---|
[228] | 565 | |
---|
| 566 | |
---|
[158] | 567 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 568 | // giet_fb_sync_read() |
---|
| 569 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[158] | 570 | // This blocking function use a memory copy strategy to transfer data from the |
---|
| 571 | // frame buffer device in kernel space to an user buffer. |
---|
| 572 | // offset : offset (in bytes) in the frame buffer |
---|
| 573 | // buffer : base address of the user buffer |
---|
| 574 | // length : number of bytes to be transfered |
---|
| 575 | // - Returns 0 if success, > 0 if error (e.g. memory buffer not in user space). |
---|
| 576 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 577 | unsigned int giet_fb_sync_read(unsigned int offset, void * buffer, unsigned int length) { |
---|
| 578 | return sys_call(SYSCALL_FB_SYNC_READ, offset, (unsigned int) buffer, length, 0); |
---|
[158] | 579 | } |
---|
[228] | 580 | |
---|
| 581 | |
---|
[158] | 582 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 583 | // giet_fb_write() |
---|
| 584 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[158] | 585 | // This non-blocking function use the DMA coprocessor to transfer data from a |
---|
| 586 | // user buffer to the frame buffer device in kernel space. |
---|
| 587 | // - offset : offset (in bytes) in the frame buffer |
---|
| 588 | // - buffer : base address of the user buffer |
---|
| 589 | // - length : number of bytes to be transfered |
---|
| 590 | // The transfer completion is signaled by an IRQ, and must be tested by the |
---|
| 591 | // fb_completed() function. |
---|
| 592 | // - Returns 0 if success, > 0 if error (e.g. memory buffer not in user space). |
---|
| 593 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 594 | unsigned int giet_fb_write(unsigned int offset, void * buffer, unsigned int length) { |
---|
| 595 | return sys_call(SYSCALL_FB_WRITE, offset, (unsigned int) buffer, length, 0); |
---|
[158] | 596 | } |
---|
[228] | 597 | |
---|
| 598 | |
---|
[158] | 599 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 600 | // giet_fb_read() |
---|
| 601 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[158] | 602 | // This non-blocking function use the DMA coprocessor to transfer data from the |
---|
| 603 | // frame buffer device in kernel space to an user buffer. |
---|
| 604 | // - offset : offset (in bytes) in the frame buffer |
---|
| 605 | // - buffer : base address of the memory buffer |
---|
| 606 | // - length : number of bytes to be transfered |
---|
| 607 | // The transfer completion is signaled by an IRQ, and must be tested by the |
---|
| 608 | // fb_completed() function. |
---|
| 609 | // - Returns 0 if success, > 0 if error (e.g. memory buffer not in user space). |
---|
| 610 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 611 | unsigned int giet_fb_read(unsigned int offset, void * buffer, unsigned int length) { |
---|
| 612 | return sys_call(SYSCALL_FB_READ, offset, (unsigned int) buffer, length, 0); |
---|
[158] | 613 | } |
---|
[228] | 614 | |
---|
| 615 | |
---|
[158] | 616 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 617 | // giet_fb_completed() |
---|
| 618 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[158] | 619 | // This blocking function returns when the transfer is completed. |
---|
| 620 | // - Returns 0 if success, > 0 if error. |
---|
| 621 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 622 | unsigned int giet_fb_completed() { |
---|
| 623 | return sys_call(SYSCALL_FB_COMPLETED, 0, 0, 0, 0); |
---|
[158] | 624 | } |
---|
| 625 | |
---|
[228] | 626 | |
---|
[218] | 627 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 628 | // giet_nic_write() |
---|
| 629 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 630 | // This non-blocking function use the DMA coprocessor to transfer data from the |
---|
| 631 | // NIC device to an user buffer. |
---|
| 632 | // - offset : offset (in bytes) in the NIC |
---|
| 633 | // - buffer : base address of the memory buffer |
---|
| 634 | // - length : number of bytes to be transfered |
---|
| 635 | // The transfer completion is signaled by an IRQ, and must be tested by the |
---|
| 636 | // nic_completed() function. |
---|
| 637 | // - Returns 0 if success, > 0 if error (e.g. memory buffer not in user space). |
---|
| 638 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 639 | |
---|
[228] | 640 | unsigned int giet_nic_write(unsigned int offset, void * buffer, unsigned int length) { |
---|
| 641 | return sys_call(SYSCALL_NIC_WRITE, offset, (unsigned int) buffer, length, 0); |
---|
[218] | 642 | } |
---|
| 643 | |
---|
[228] | 644 | |
---|
[218] | 645 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 646 | // giet_nic_read() |
---|
| 647 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 648 | // This non-blocking function use the DMA coprocessor to transfer data from the |
---|
| 649 | // NIC device to an user buffer. |
---|
| 650 | // - offset : offset (in bytes) in the NIC |
---|
| 651 | // - buffer : base address of the memory buffer |
---|
| 652 | // - length : number of bytes to be transfered |
---|
| 653 | // The transfer completion is signaled by an IRQ, and must be tested by the |
---|
| 654 | // nic_completed() function. |
---|
| 655 | // - Returns 0 if success, > 0 if error (e.g. memory buffer not in user space). |
---|
| 656 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 657 | |
---|
[228] | 658 | unsigned int giet_nic_read(unsigned int offset, void * buffer, unsigned int length) { |
---|
| 659 | return sys_call(SYSCALL_NIC_READ, offset, (unsigned int) buffer, length, 0); |
---|
[218] | 660 | } |
---|
| 661 | |
---|
[228] | 662 | |
---|
[218] | 663 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 664 | // giet_nic_completed() |
---|
| 665 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 666 | // This blocking function returns when the transfer is completed. |
---|
| 667 | // - Returns 0 if success, > 0 if error. |
---|
| 668 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 669 | unsigned int giet_nic_completed() { |
---|
| 670 | return sys_call(SYSCALL_NIC_COMPLETED, 0, 0, 0, 0); |
---|
[218] | 671 | } |
---|
| 672 | |
---|
[228] | 673 | |
---|
[165] | 674 | ///// Miscellaneous related system calls ///// |
---|
[158] | 675 | |
---|
| 676 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 677 | // giet_vobj_get_vbase() |
---|
[158] | 678 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 679 | // This function writes in argument (vobj_vaddr) the virtual base address |
---|
| 680 | // of a vobj (defined in the mapping_info data structure), identified by |
---|
| 681 | // the two arguments (vspace_name and vobj_name). |
---|
| 682 | // The (vobj_type) argument is redundant, and used for coherence checking. |
---|
| 683 | // - Returns the address if success, 0 if error ( not defined or wrong type ) |
---|
| 684 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 685 | unsigned int giet_vobj_get_vbase(char * vspace_name, char * vobj_name, unsigned int vobj_type, unsigned int * vobj_vaddr) { |
---|
[160] | 686 | return sys_call(SYSCALL_VOBJ_GET_VBASE, |
---|
[228] | 687 | (unsigned int) vspace_name, |
---|
| 688 | (unsigned int) vobj_name, |
---|
| 689 | (unsigned int) vobj_type, |
---|
| 690 | (unsigned int) vobj_vaddr); |
---|
[158] | 691 | } |
---|
[165] | 692 | |
---|
[228] | 693 | |
---|
[158] | 694 | //////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 695 | // giet_proc_number() |
---|
| 696 | //////////////////////////////////////////////////////////////////////////////////// |
---|
[158] | 697 | // This function returns in the buffer argument the number of processors |
---|
| 698 | // in the cluster specified by the cluster_id argument. |
---|
| 699 | // - Returns 0 if success, > 0 if error ( cluster index too large ) |
---|
| 700 | //////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 701 | unsigned int giet_proc_number(unsigned int cluster_id, unsigned int * buffer) { |
---|
| 702 | return sys_call(SYSCALL_PROC_NUMBER, cluster_id, (unsigned int) buffer, 0, 0); |
---|
[158] | 703 | } |
---|
| 704 | |
---|
[228] | 705 | |
---|
[158] | 706 | ///// Miscellaneous system calls ///// |
---|
| 707 | |
---|
| 708 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 709 | // giet_task_exit() |
---|
| 710 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[158] | 711 | // This function stops execution of the calling task with a TTY message, |
---|
| 712 | // and enter an infinite loop. |
---|
| 713 | // The task is blocked, but it still consume processor cycles ... |
---|
| 714 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 715 | void giet_exit() { |
---|
| 716 | sys_call(SYSCALL_EXIT, 0, 0, 0, 0); |
---|
[158] | 717 | } |
---|
[228] | 718 | |
---|
| 719 | |
---|
[158] | 720 | /////////////////////////////////////////////////////////////////////////////////// |
---|
[165] | 721 | // giet_rand() |
---|
[158] | 722 | // This function returns a pseudo-random value derived from the processor cycle |
---|
| 723 | // count. This value is comprised between 0 & 65535. |
---|
| 724 | /////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 725 | unsigned int giet_rand() { |
---|
| 726 | unsigned int x = sys_call(SYSCALL_PROCTIME, 0, 0, 0, 0); |
---|
| 727 | if ((x & 0xF) > 7) { |
---|
[158] | 728 | return (x*x & 0xFFFF); |
---|
[228] | 729 | } |
---|
| 730 | else { |
---|
[158] | 731 | return (x*x*x & 0xFFFF); |
---|
[228] | 732 | } |
---|
[158] | 733 | } |
---|
[228] | 734 | |
---|
| 735 | |
---|
[158] | 736 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 737 | // giet_context_switch() |
---|
[158] | 738 | // The user task calling this function is descheduled and |
---|
| 739 | // the processor is allocated to another task. |
---|
| 740 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[228] | 741 | unsigned int giet_context_switch() { |
---|
| 742 | return sys_call(SYSCALL_CTX_SWITCH, 0, 0, 0, 0); |
---|
[158] | 743 | } |
---|
| 744 | |
---|
[228] | 745 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[232] | 746 | // giet_proc_task_id() |
---|
| 747 | // This functions returns the local task id, i.e. the processor task id (ranging |
---|
| 748 | // from 0 to n-1(p) for each processor if p has n tasks) |
---|
[228] | 749 | ////////////////////////////////////////////////////////////////////////////////// |
---|
[232] | 750 | unsigned int giet_proc_task_id() { |
---|
| 751 | return sys_call(SYSCALL_PROC_TASK_ID, 0, 0, 0, 0); |
---|
[228] | 752 | } |
---|
[158] | 753 | |
---|
[232] | 754 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 755 | // giet_heap_info() |
---|
| 756 | // This function returns the base address and size of the current task's heap |
---|
| 757 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 758 | unsigned int giet_heap_info(unsigned int * vaddr, unsigned int * length) { |
---|
| 759 | return sys_call(SYSCALL_HEAP_INFO, (unsigned int) vaddr, (unsigned int) length, 0, 0); |
---|
| 760 | } |
---|
[228] | 761 | |
---|
[232] | 762 | |
---|
| 763 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 764 | // giet_global_task_id() |
---|
| 765 | // This functions returns the global task id, which is unique in all the giet |
---|
| 766 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 767 | unsigned int giet_global_task_id() { |
---|
| 768 | return sys_call(SYSCALL_GLOBAL_TASK_ID, 0, 0, 0, 0); |
---|
| 769 | } |
---|
| 770 | |
---|
[228] | 771 | // Local Variables: |
---|
| 772 | // tab-width: 4 |
---|
| 773 | // c-basic-offset: 4 |
---|
| 774 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
---|
| 775 | // indent-tabs-mode: nil |
---|
| 776 | // End: |
---|
| 777 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
---|
| 778 | |
---|