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/*
* (C) Copyright 2013
* David Feng <fenghua@phytium.com.cn>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <asm/ptrace.h>
#include <asm/assembler64.h>
#include <linux/linkage.h>
/*
* Enter Exception.
* This will save the processor state that is ELR/X0~X30
* to the stack frame.
*/
.macro exception_entry
stp x29, x30, [sp, #-16]!
stp x27, x28, [sp, #-16]!
stp x25, x26, [sp, #-16]!
stp x23, x24, [sp, #-16]!
stp x21, x22, [sp, #-16]!
stp x19, x20, [sp, #-16]!
stp x17, x18, [sp, #-16]!
stp x15, x16, [sp, #-16]!
stp x13, x14, [sp, #-16]!
stp x11, x12, [sp, #-16]!
stp x9, x10, [sp, #-16]!
stp x7, x8, [sp, #-16]!
stp x5, x6, [sp, #-16]!
stp x3, x4, [sp, #-16]!
stp x1, x2, [sp, #-16]!
switch_el x11, 3f, 2f, 1f
3: mrs x1, esr_el3
mrs x2, elr_el3
mrs x3, far_el3
b 0f
2: mrs x1, esr_el2
mrs x2, elr_el2
mrs x3, far_el2
b 0f
1: mrs x1, esr_el1
mrs x2, elr_el1
mrs x3, far_el1
0:
stp x2, x0, [sp, #-16]!
mov x0, sp
.endm
/*
* Exception vectors.
*/
.align 11
.globl vectors
vectors:
.align 7
b _do_bad_sync /* Current EL Synchronous Thread */
.align 7
b _do_bad_irq /* Current EL IRQ Thread */
.align 7
b _do_bad_fiq /* Current EL FIQ Thread */
.align 7
b _do_bad_error /* Current EL Error Thread */
.align 7
b _do_sync /* Current EL Synchronous Handler */
.align 7
b _do_irq /* Current EL IRQ Handler */
.align 7
b _do_fiq /* Current EL FIQ Handler */
.align 7
b _do_error /* Current EL Error Handler */
_do_bad_sync:
exception_entry
bl do_bad_sync
b exception_exit
_do_bad_irq:
exception_entry
bl do_bad_irq
b exception_exit
_do_bad_fiq:
exception_entry
bl do_bad_fiq
b exception_exit
_do_bad_error:
exception_entry
bl do_bad_error
b exception_exit
_do_sync:
exception_entry
mov x2, x3
bl do_sync
b exception_exit
_do_irq:
exception_entry
bl do_irq
b exception_exit
_do_fiq:
exception_entry
bl do_fiq
b exception_exit
_do_error:
exception_entry
bl do_error
b exception_exit
exception_exit:
ldp x2, x0, [sp],#16
switch_el x11, 3f, 2f, 1f
3: msr elr_el3, x2
b 0f
2: msr elr_el2, x2
b 0f
1: msr elr_el1, x2
0:
ldp x1, x2, [sp],#16
ldp x3, x4, [sp],#16
ldp x5, x6, [sp],#16
ldp x7, x8, [sp],#16
ldp x9, x10, [sp],#16
ldp x11, x12, [sp],#16
ldp x13, x14, [sp],#16
ldp x15, x16, [sp],#16
ldp x17, x18, [sp],#16
ldp x19, x20, [sp],#16
ldp x21, x22, [sp],#16
ldp x23, x24, [sp],#16
ldp x25, x26, [sp],#16
ldp x27, x28, [sp],#16
ldp x29, x30, [sp],#16
eret
.section .data
.align 4
.global arm_ignore_data_abort
arm_ignore_data_abort:
.word 0 /* When != 0 data aborts are ignored */
.global arm_data_abort_occurred
arm_data_abort_occurred:
.word 0 /* set != 0 by the data abort handler */
abort_stack:
.space 8
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