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| author | bhgv <bhgv.empire@gmail.com> | 2018-03-01 16:54:45 +0200 |
|---|---|---|
| committer | bhgv <bhgv.empire@gmail.com> | 2018-03-01 16:54:45 +0200 |
| commit | b786f20bbab5a59046aa78a2c6c2a11536497202 (patch) | |
| tree | 0851ecdec889eb9b7ba3751cc04d4f0b474e4a9e /emu/Linux/arm-tas-v7.S | |
inferno-os tree was separated from the inferno-os-android (separated from the Android driver)
Diffstat (limited to 'emu/Linux/arm-tas-v7.S')
| -rw-r--r-- | emu/Linux/arm-tas-v7.S | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/emu/Linux/arm-tas-v7.S b/emu/Linux/arm-tas-v7.S new file mode 100644 index 0000000..584b31f --- /dev/null +++ b/emu/Linux/arm-tas-v7.S @@ -0,0 +1,30 @@ + .file "arm-tas-v7.S" +#ifndef ARMv7 +#define DMB mcr p15, 0, r0, c7, c10, 5 +#else +#define DMB dmb +#endif +.align 2 +.global _tas +.type _tas, %function +_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 +tas1: + ldrex r0, [r1] + cmp r0, #0 + bne lockbusy + strex r3, r2, [r1] + cmp r3, #0 + bne tas1 + DMB + bx lr +lockbusy: + clrex + bx lr + .size _tas, .-_tas |