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| author | Kevin | 2014-11-15 09:58:27 +0800 |
|---|---|---|
| committer | Kevin | 2014-11-15 09:58:27 +0800 |
| commit | 392e8802486cb573b916e746010e141a75f507e6 (patch) | |
| tree | 50029aca02c81f087b90336e670b44e510782330 /ANDROID_3.4.5/arch/arm/mm/abort-ev4t.S | |
| download | FOSSEE-netbook-kernel-source-392e8802486cb573b916e746010e141a75f507e6.tar.gz FOSSEE-netbook-kernel-source-392e8802486cb573b916e746010e141a75f507e6.tar.bz2 FOSSEE-netbook-kernel-source-392e8802486cb573b916e746010e141a75f507e6.zip | |
init android origin source code
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mm/abort-ev4t.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mm/abort-ev4t.S | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mm/abort-ev4t.S b/ANDROID_3.4.5/arch/arm/mm/abort-ev4t.S new file mode 100644 index 00000000..9da704e7 --- /dev/null +++ b/ANDROID_3.4.5/arch/arm/mm/abort-ev4t.S @@ -0,0 +1,27 @@ +#include <linux/linkage.h> +#include <asm/assembler.h> +#include "abort-macro.S" +/* + * Function: v4t_early_abort + * + * Params : r2 = pt_regs + * : r4 = aborted context pc + * : r5 = aborted context psr + * + * Returns : r4 - r11, r13 preserved + * + * Purpose : obtain information about current aborted instruction. + * Note: we read user space. This means we might cause a data + * abort here if the I-TLB and D-TLB aren't seeing the same + * picture. Unfortunately, this does happen. We live with it. + */ + .align 5 +ENTRY(v4t_early_abort) + mrc p15, 0, r1, c5, c0, 0 @ get FSR + mrc p15, 0, r0, c6, c0, 0 @ get FAR + do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3 + ldreq r3, [r4] @ read aborted ARM instruction + bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR + tst r3, #1 << 20 @ check write + orreq r1, r1, #1 << 11 + b do_DataAbort |