|
Last change
on this file since 565 was
536,
checked in by meunier, 11 years ago
|
|
Added a tool which generates tests for the LL/SC table, in the soft/ directory.
|
|
File size:
749 bytes
|
| Line | |
|---|
| 1 | |
|---|
| 2 | #include "functions.h" |
|---|
| 3 | |
|---|
| 4 | void take_lock(volatile int * plock) { |
|---|
| 5 | volatile int * _plock = plock; |
|---|
| 6 | __asm__ __volatile__ ( |
|---|
| 7 | "move $16, %0 \n" |
|---|
| 8 | "giet_lock_try : \n" |
|---|
| 9 | "ll $2, 0($16) \n" |
|---|
| 10 | "bnez $2, giet_lock_try \n" |
|---|
| 11 | "li $3, 1 \n" |
|---|
| 12 | "sc $3, 0($16) \n" |
|---|
| 13 | "beqz $3, giet_lock_try \n" |
|---|
| 14 | "nop \n" |
|---|
| 15 | "giet_lock_ok: \n" |
|---|
| 16 | "nop \n" |
|---|
| 17 | : |
|---|
| 18 | :"r" (_plock) |
|---|
| 19 | :"$2", "$3", "$4", "$16"); |
|---|
| 20 | } |
|---|
| 21 | |
|---|
| 22 | |
|---|
| 23 | void release_lock(volatile int * plock) { |
|---|
| 24 | asm volatile("\tsync\n"); |
|---|
| 25 | *plock = 0; |
|---|
| 26 | } |
|---|
| 27 | |
|---|
| 28 | |
|---|
Note: See
TracBrowser
for help on using the repository browser.
