#include <linux/linkage.h> #include <asm/assembler.h> #include "abort-macro.S" /* * Function: v6_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(v6_early_abort) mrc p15, 0, r1, c5, c0, 0 @ get FSR mrc p15, 0, r0, c6, c0, 0 @ get FAR /* * Faulty SWP instruction on 1136 doesn't set bit 11 in DFSR. */ #ifdef [31mCONFIG_ARM_ERRATA_326103[0m ldr ip, =0x4107b36 mrc p15, 0, r3, c0, c0, 0 @ get processor id teq ip, r3, lsr #4 @ r0 ARM1136? bne 1f tst r5, #PSR_J_BIT @ Java? tsteq r5, #PSR_T_BIT @ Thumb? bne 1f bic r1, r1, #1 << 11 @ clear bit 11 of FSR ldr r3, [r4] @ read aborted ARM instruction ARM_BE8(rev r3, r3) teq_ldrd tmp=ip, insn=r3 @ insn was LDRD? beq 1f @ yes tst r3, #1 << 20 @ L = 0 -> write orreq r1, r1, #1 << 11 @ yes. #endif 1: uaccess_disable ip @ disable userspace access b do_DataAbort |