Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#include <linux/linkage.h>
#include <asm/assembler.h>
#include "abort-macro.S"
/*
 * Function: v5t_early_abort
 *
 * Params  : r2 = address of aborted instruction
 *         : r3 = saved SPSR
 *
 * Returns : r0 = address of abort
 *         : r1 = FSR, bit 11 = write
 *         : r2-r8 = corrupted
 *         : r9 = preserved
 *         : sp = pointer to registers
 *
 * 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(v5t_early_abort)
        mrc     p15, 0, r1, c5, c0, 0           @ get FSR
        mrc     p15, 0, r0, c6, c0, 0           @ get FAR
        do_thumb_abort
        ldreq   r3, [r2]                        @ read aborted ARM instruction
        bic     r1, r1, #1 << 11                @ clear bits 11 of FSR
        do_ldrd_abort
        tst     r3, #1 << 20                    @ check write
        orreq   r1, r1, #1 << 11
        mov     pc, lr