diff options
Diffstat (limited to 'src/sys')
| -rw-r--r-- | src/sys/core.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/sys/core.h b/src/sys/core.h index 2ba2f16..fa9e1b5 100644 --- a/src/sys/core.h +++ b/src/sys/core.h @@ -19,6 +19,28 @@ static inline void delay(unsigned long cycles) : "=r"(cycles): [cycles]"0"(cycles) : "cc"); } +static inline void preserveregs(void) +{ + asm volatile("push {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11}"); +} + +static inline void restoreregs(void) +{ + asm volatile("pop {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11}"); +} + +static inline void* getsp(void) +{ + void* out; + asm volatile ("mov %0, sp" : "=r"(out)); + return out; +} + +static inline void setsp(void* in) +{ + asm volatile ("mov sp, %0" :: "r"(in)); +} + enum { // The offset for the MMIO area |