| 1 | @ vim:filetype=armasm |
| 2 | #include <sys/syscall.h> |
| 3 | |
| 4 | |
| 5 | .global sys_cacheflush @ void *start_addr, void *end_addr |
| 6 | |
| 7 | sys_cacheflush: |
| 8 | mov r2, #0 |
| 9 | #ifdef __ARM_EABI__ |
| 10 | /* EABI version */ |
| 11 | str r7, [sp, #-4]! |
| 12 | mov r7, #(__ARM_NR_cacheflush & 0xff) |
| 13 | orr r7, r7, #(__ARM_NR_cacheflush & 0x00ff00) |
| 14 | orr r7, r7, #(__ARM_NR_cacheflush & 0xff0000) |
| 15 | swi 0 |
| 16 | ldr r7, [sp], #4 |
| 17 | #else |
| 18 | /* OABI */ |
| 19 | swi __ARM_NR_cacheflush |
| 20 | #endif |
| 21 | bx lr |
| 22 | |
| 23 | .global spend_cycles |
| 24 | spend_cycles: |
| 25 | mov r0,r0,lsr #2 |
| 26 | 0:subs r0, r0, #1 |
| 27 | bne 0b |
| 28 | bx lr |
| 29 | |