diff options
Diffstat (limited to 'gp2x/sys_cacheflush.S')
| -rw-r--r-- | gp2x/sys_cacheflush.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gp2x/sys_cacheflush.S b/gp2x/sys_cacheflush.S new file mode 100644 index 0000000..d26f81a --- /dev/null +++ b/gp2x/sys_cacheflush.S @@ -0,0 +1,29 @@ +@ vim:filetype=armasm +#include <sys/syscall.h> + + +.global sys_cacheflush @ void *start_addr, void *end_addr + +sys_cacheflush: + mov r2, #0 +#ifdef __ARM_EABI__ + /* EABI version */ + str r7, [sp, #-4]! + mov r7, #(__ARM_NR_cacheflush & 0xff) + orr r7, r7, #(__ARM_NR_cacheflush & 0x00ff00) + orr r7, r7, #(__ARM_NR_cacheflush & 0xff0000) + swi 0 + ldr r7, [sp], #4 +#else + /* OABI */ + swi __ARM_NR_cacheflush +#endif + bx lr + +.global spend_cycles +spend_cycles: + mov r0,r0,lsr #2 + 0:subs r0, r0, #1 + bne 0b + bx lr + |