| /branches/arm/uspace/libc/arch/arm32/include/psthread.h |
|---|
| 37,13 → 37,27 |
| #define LIBC_arm32_PSTHREAD_H_ |
| #include <types.h> |
| #define STACK_ITEM_SIZE 4 |
| #define SP_DELTA 0 /* TODO */ |
| /** see <a href="http://www.arm.com/support/faqdev/14269.html">ABI</a> for details */ |
| #define STACK_ALIGNMENT 8 |
| #define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)) |
| //TODO: check if correct |
| typedef struct { |
| uint32_t sp; |
| uint32_t pc; |
| uint32_t tls; |
| uint32_t tls; //? where will be stored? |
| // registers that called subrutine cannot change |
| uint32_t r4; |
| uint32_t r5; |
| uint32_t r6; |
| uint32_t r7; |
| uint32_t r8; |
| uint32_t r10; |
| uint32_t r11; |
| // not shure if not to be changed r9, IP, |
| } context_t; |
| #endif |
| /branches/arm/uspace/libc/arch/arm32/include/atomic.h |
|---|
| 1,5 → 1,5 |
| /* |
| * Copyright (c) 2005 Jakub Jermar |
| * Copyright (c) 2007 Michal Kebrt |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 38,14 → 38,30 |
| /** Atomic addition. |
| * |
| * @param val Atomic value. |
| * @param imm Value to add. |
| * @param i Value to add. |
| * |
| * @return Value after addition. |
| */ |
| static inline long atomic_add(atomic_t *val, int imm) |
| static inline long atomic_add(atomic_t *val, int i) |
| { |
| /* TODO */ |
| return (val->count += imm); |
| int ret; |
| volatile long * mem = &(val->count); |
| asm volatile ( |
| "1: \n" |
| "ldr r2, [%1] \n" |
| "add r3, r2, %2 \n" |
| "str r3, %0 \n" |
| "swp r3, r3, [%1] \n" |
| "cmp r3, r2 \n" |
| "bne 1b \n" |
| : "=m" (ret) |
| : "r" (mem), "r" (i) |
| : "r3", "r2" |
| ); |
| return ret; |
| } |
| static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |
| /branches/arm/uspace/libc/arch/arm32/src/psthread.S |
|---|
| 32,7 → 32,18 |
| .global context_restore |
| context_save: |
| /* TODO */ |
| stmia r0!, {sp, lr} |
| stmia r0!, {r4-r8, r10-r11} |
| # return 1 |
| mov r0, #1 |
| mov pc, lr |
| context_restore: |
| /* TODO */ |
| ldmia r0!, {sp, lr} |
| ldmia r0!, {r4-r8, r10-r11} |
| #return 0 |
| mov r0, #0 |
| mov pc, lr |