diff options
Diffstat (limited to 'emu/NetBSD/asm-arm.S')
| -rw-r--r-- | emu/NetBSD/asm-arm.S | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/emu/NetBSD/asm-arm.S b/emu/NetBSD/asm-arm.S new file mode 100644 index 00000000..afaa5479 --- /dev/null +++ b/emu/NetBSD/asm-arm.S @@ -0,0 +1,78 @@ +#include <machine/asm.h> + +/* + * ulong _tas(ulong*); + */ +#if __ARM_ARCH >= 6 + +#if __ARM_ARCH >= 7 +#define DMB dmb +#else +#define DMB mcr p15, 0, r0, c7, c10, 5 +#endif + +ENTRY(_tas) + @ args = 0, pretend = 0, frame = 0 + @ frame_needed = 0, uses_anonymous_args = 0 + @ link register save eliminated. + @ lr needed for prologue + DMB + mov r1, r0 + mov r2, #0xaa +.Loop: + ldrex r0, [r1] + cmp r0, #0 + bne .Lockbusy + strex r3, r2, [r1] + cmp r3, #0 + bne .Loop + DMB + bx lr +.Lockbusy: + clrex + bx lr + END(_tas) + +#else /* __ARM_ARCH <= 5*/ + +ENTRY(_tas) + @ args = 0, pretend = 0, frame = 0 + @ frame_needed = 0, uses_anonymous_args = 0 + @ link register save eliminated. + @ lr needed for prologue + mov r3, #1 + mov r1, r0 + swp r0, r3, [r1] + bx lr + END(_tas) + +#endif /* __ARM_ARCH <= 5*/ + + +/* + * void FPsave(void *); + */ +ENTRY(FPsave) + @ args = 0, pretend = 0, frame = 4 + @ frame_needed = 1, uses_anonymous_args = 0 + mov ip, sp + stmfd sp!, {fp, ip, lr, pc} + sub fp, ip, #4 + sub sp, sp, #4 + str r0, [fp, #-16] + ldmea fp, {fp, sp, pc} + END(FPsave) + +/* + * void FPrestore(void *); + */ +ENTRY(FPrestore) + @ args = 0, pretend = 0, frame = 4 + @ frame_needed = 1, uses_anonymous_args = 0 + mov ip, sp + stmfd sp!, {fp, ip, lr, pc} + sub fp, ip, #4 + sub sp, sp, #4 + str r0, [fp, #-16] + ldmea fp, {fp, sp, pc} + END(FPrestore) |