diff options
| author | ardafu <[email protected]> | 2015-04-16 14:13:43 +0800 |
|---|---|---|
| committer | ardafu <[email protected]> | 2015-04-16 14:13:43 +0800 |
| commit | 175e357acecdbe86200fdc8a0866716d822ca516 (patch) | |
| tree | 27492c4bd0b6ab52d8c51be3de4a5cf84bd3c63d /libcpu/arm/arm926/stack.c | |
| parent | f4555bf71189ee76c41a4ad2398ad54da4b1d7bf (diff) | |
[libcpu][arm926] Remove unused SPSR register PUSH/POP when os switch thread.
Diffstat (limited to 'libcpu/arm/arm926/stack.c')
| -rw-r--r-- | libcpu/arm/arm926/stack.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libcpu/arm/arm926/stack.c b/libcpu/arm/arm926/stack.c index ba3a11d208..53508e5acf 100644 --- a/libcpu/arm/arm926/stack.c +++ b/libcpu/arm/arm926/stack.c @@ -66,8 +66,11 @@ rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, *(--stk) = 0; /* r2 */ *(--stk) = 0; /* r1 */ *(--stk) = (rt_uint32_t)parameter; /* r0 : argument */ - *(--stk) = SVCMODE; /* cpsr */ - *(--stk) = SVCMODE; /* spsr */ + /* cpsr */ + if ((rt_uint32_t)tentry & 0x01) + *(--stk) = SVCMODE | 0x20; /* thumb mode */ + else + *(--stk) = SVCMODE; /* arm mode */ /* return task's current stack address */ return (rt_uint8_t *)stk; |