linux/arch/arm/mm/abort-ev7.S

#include <linux/linkage.h>
#include <asm/assembler.h>
/*
 * Function: v7_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.
 */
	.align	5
ENTRY(v7_early_abort)
	/*
	 * The effect of data aborts on on the exclusive access monitor are
	 * UNPREDICTABLE. Do a CLREX to clear the state
	 */
	clrex

	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
	mrc	p15, 0, r0, c6, c0, 0		@ get FAR

	/*
	 * V6 code adjusts the returned DFSR.
	 * New designs should not need to patch up faults.
	 */

#if defined(CONFIG_VERIFY_PERMISSION_FAULT)
	/*
	 * Detect erroneous permission failures and fix
	 */
	ldr	r3, =0x40d			@ On permission fault
	and	r3, r1, r3
	cmp	r3, #0x0d
	bne	do_DataAbort

	mcr	p15, 0, r0, c7, c8, 0   	@ Retranslate FAR
	isb
	mrc	p15, 0, ip, c7, c4, 0   	@ Read the PAR
	and	r3, ip, #0x7b   		@ On translation fault
	cmp	r3, #0x0b
	bne	do_DataAbort
	bic	r1, r1, #0xf			@ Fix up FSR FS[5:0]
	and	ip, ip, #0x7e
	orr	r1, r1, ip, LSR #1
#endif

	b	do_DataAbort
ENDPROC(v7_early_abort)
[ARM] armv7: add support for ARMv7 cores. This patch adds support for the ARMv7 cores. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-05-09 01:27:46 +04:00			`#include <linux/linkage.h>`
			`#include <asm/assembler.h>`
			`/*`
			`* Function: v7_early_abort`
			`*`
ARM: entry: data abort: tail-call the main data abort handler Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 19:01:26 +04:00			`* Params : r2 = pt_regs`
			`* : r4 = aborted context pc`
ARM: entry: data abort: arrange for CPU abort helpers to take pc/psr in r4/r5 Re-jig the CPU abort helpers to take the PC/PSR in r4/r5 rather than r2/r3. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 17:35:07 +04:00			`* : r5 = aborted context psr`
[ARM] armv7: add support for ARMv7 cores. This patch adds support for the ARMv7 cores. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-05-09 01:27:46 +04:00			`*`
ARM: entry: data abort: tail-call the main data abort handler Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 19:01:26 +04:00			`* Returns : r4 - r11, r13 preserved`
[ARM] armv7: add support for ARMv7 cores. This patch adds support for the ARMv7 cores. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-05-09 01:27:46 +04:00			`*`
			`* Purpose : obtain information about current aborted instruction.`
			`*/`
			`.align 5`
			`ENTRY(v7_early_abort)`
			`/*`
			`* The effect of data aborts on on the exclusive access monitor are`
			`* UNPREDICTABLE. Do a CLREX to clear the state`
			`*/`
			`clrex`

			`mrc p15, 0, r1, c5, c0, 0 @ get FSR`
			`mrc p15, 0, r0, c6, c0, 0 @ get FAR`

			`/*`
			`* V6 code adjusts the returned DFSR.`
			`* New designs should not need to patch up faults.`
			`*/`
arm: mm: qsd8x50: Fix incorrect permission faults Handle incorrectly reported permission faults for qsd8650. On permission faults, retry MVA to PA conversion. If retry detects translation fault. Report as translation fault. Cc: Jamie Lokier <jamie@shareable.org> Signed-off-by: Dave Estes <cestes@quicinc.com> 2009-08-12 01:58:49 +04:00
			`#if defined(CONFIG_VERIFY_PERMISSION_FAULT)`
			`/*`
			`* Detect erroneous permission failures and fix`
			`*/`
			`ldr r3, =0x40d @ On permission fault`
			`and r3, r1, r3`
			`cmp r3, #0x0d`
ARM: entry: data abort: tail-call the main data abort handler Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 19:01:26 +04:00			`bne do_DataAbort`
arm: mm: qsd8x50: Fix incorrect permission faults Handle incorrectly reported permission faults for qsd8650. On permission faults, retry MVA to PA conversion. If retry detects translation fault. Report as translation fault. Cc: Jamie Lokier <jamie@shareable.org> Signed-off-by: Dave Estes <cestes@quicinc.com> 2009-08-12 01:58:49 +04:00
			`mcr p15, 0, r0, c7, c8, 0 @ Retranslate FAR`
			`isb`
ARM: entry: data abort: avoid using r2 in abort helpers This allows us to pass the pt_regs pointer in to these functions ready for tail-calling the abort handler. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 17:42:02 +04:00			`mrc p15, 0, ip, c7, c4, 0 @ Read the PAR`
			`and r3, ip, #0x7b @ On translation fault`
arm: mm: qsd8x50: Fix incorrect permission faults Handle incorrectly reported permission faults for qsd8650. On permission faults, retry MVA to PA conversion. If retry detects translation fault. Report as translation fault. Cc: Jamie Lokier <jamie@shareable.org> Signed-off-by: Dave Estes <cestes@quicinc.com> 2009-08-12 01:58:49 +04:00			`cmp r3, #0x0b`
ARM: entry: data abort: tail-call the main data abort handler Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 19:01:26 +04:00			`bne do_DataAbort`
arm: mm: qsd8x50: Fix incorrect permission faults Handle incorrectly reported permission faults for qsd8650. On permission faults, retry MVA to PA conversion. If retry detects translation fault. Report as translation fault. Cc: Jamie Lokier <jamie@shareable.org> Signed-off-by: Dave Estes <cestes@quicinc.com> 2009-08-12 01:58:49 +04:00			`bic r1, r1, #0xf @ Fix up FSR FS[5:0]`
ARM: entry: data abort: avoid using r2 in abort helpers This allows us to pass the pt_regs pointer in to these functions ready for tail-calling the abort handler. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 17:42:02 +04:00			`and ip, ip, #0x7e`
			`orr r1, r1, ip, LSR #1`
arm: mm: qsd8x50: Fix incorrect permission faults Handle incorrectly reported permission faults for qsd8650. On permission faults, retry MVA to PA conversion. If retry detects translation fault. Report as translation fault. Cc: Jamie Lokier <jamie@shareable.org> Signed-off-by: Dave Estes <cestes@quicinc.com> 2009-08-12 01:58:49 +04:00			`#endif`

ARM: entry: data abort: tail-call the main data abort handler Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 19:01:26 +04:00			`b do_DataAbort`
[ARM] 5227/1: Add the ENDPROC declarations to the .S files This declaration specifies the "function" type and size for various assembly functions, mainly needed for generating the correct branch instructions in Thumb-2. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2008-08-28 14:22:32 +04:00			`ENDPROC(v7_early_abort)`