GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)
This commit is contained in:
@@ -0,0 +1,292 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0+ */
|
||||
/*
|
||||
* vectors - Generic ARM exception table code
|
||||
*
|
||||
* Copyright (c) 1998 Dan Malek <dmalek@jlc.net>
|
||||
* Copyright (c) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
|
||||
* Copyright (c) 2000 Wolfgang Denk <wd@denx.de>
|
||||
* Copyright (c) 2001 Alex Züpke <azu@sysgo.de>
|
||||
* Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
|
||||
* Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
|
||||
* Copyright (c) 2002 Gary Jennejohn <garyj@denx.de>
|
||||
* Copyright (c) 2002 Kyle Harris <kharris@nexus-tech.net>
|
||||
*/
|
||||
|
||||
#include <config.h>
|
||||
|
||||
/*
|
||||
* A macro to allow insertion of an ARM exception vector either
|
||||
* for the non-boot0 case or by a boot0-header.
|
||||
*/
|
||||
.macro ARM_VECTORS
|
||||
#ifdef CONFIG_ARCH_K3
|
||||
ldr pc, _reset
|
||||
#else
|
||||
b reset
|
||||
#endif
|
||||
ldr pc, _undefined_instruction
|
||||
ldr pc, _software_interrupt
|
||||
ldr pc, _prefetch_abort
|
||||
ldr pc, _data_abort
|
||||
ldr pc, _not_used
|
||||
ldr pc, _irq
|
||||
ldr pc, _fiq
|
||||
.endm
|
||||
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* Symbol _start is referenced elsewhere, so make it global
|
||||
*
|
||||
*************************************************************************
|
||||
*/
|
||||
|
||||
.globl _start
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* Vectors have their own section so linker script can map them easily
|
||||
*
|
||||
*************************************************************************
|
||||
*/
|
||||
|
||||
.section ".vectors", "ax"
|
||||
|
||||
#if defined(CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK)
|
||||
/*
|
||||
* Various SoCs need something special and SoC-specific up front in
|
||||
* order to boot, allow them to set that in their boot0.h file and then
|
||||
* use it here.
|
||||
*
|
||||
* To allow a boot0 hook to insert a 'special' sequence after the vector
|
||||
* table (e.g. for the socfpga), the presence of a boot0 hook supresses
|
||||
* the below vector table and assumes that the vector table is filled in
|
||||
* by the boot0 hook. The requirements for a boot0 hook thus are:
|
||||
* (1) defines '_start:' as appropriate
|
||||
* (2) inserts the vector table using ARM_VECTORS as appropriate
|
||||
*/
|
||||
#include <asm/arch/boot0.h>
|
||||
#else
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* Exception vectors as described in ARM reference manuals
|
||||
*
|
||||
* Uses indirect branch to allow reaching handlers anywhere in memory.
|
||||
*
|
||||
*************************************************************************
|
||||
*/
|
||||
|
||||
_start:
|
||||
#ifdef CONFIG_SYS_DV_NOR_BOOT_CFG
|
||||
.word CONFIG_SYS_DV_NOR_BOOT_CFG
|
||||
#endif
|
||||
ARM_VECTORS
|
||||
#endif /* !defined(CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK) */
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* Indirect vectors table
|
||||
*
|
||||
* Symbols referenced here must be defined somewhere else
|
||||
*
|
||||
*************************************************************************
|
||||
*/
|
||||
|
||||
.globl _reset
|
||||
.globl _undefined_instruction
|
||||
.globl _software_interrupt
|
||||
.globl _prefetch_abort
|
||||
.globl _data_abort
|
||||
.globl _not_used
|
||||
.globl _irq
|
||||
.globl _fiq
|
||||
|
||||
#ifdef CONFIG_ARCH_K3
|
||||
_reset: .word reset
|
||||
#endif
|
||||
_undefined_instruction: .word undefined_instruction
|
||||
_software_interrupt: .word software_interrupt
|
||||
_prefetch_abort: .word prefetch_abort
|
||||
_data_abort: .word data_abort
|
||||
_not_used: .word not_used
|
||||
_irq: .word irq
|
||||
_fiq: .word fiq
|
||||
|
||||
.balignl 16,0xdeadbeef
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* Interrupt handling
|
||||
*
|
||||
*************************************************************************
|
||||
*/
|
||||
|
||||
/* SPL interrupt handling: just hang */
|
||||
|
||||
#ifdef CONFIG_SPL_BUILD
|
||||
|
||||
.align 5
|
||||
undefined_instruction:
|
||||
software_interrupt:
|
||||
prefetch_abort:
|
||||
data_abort:
|
||||
not_used:
|
||||
irq:
|
||||
fiq:
|
||||
1:
|
||||
b 1b /* hang and never return */
|
||||
|
||||
#else /* !CONFIG_SPL_BUILD */
|
||||
|
||||
/* IRQ stack memory (calculated at run-time) + 8 bytes */
|
||||
.globl IRQ_STACK_START_IN
|
||||
IRQ_STACK_START_IN:
|
||||
#ifdef IRAM_BASE_ADDR
|
||||
.word IRAM_BASE_ADDR + 0x20
|
||||
#else
|
||||
.word 0x0badc0de
|
||||
#endif
|
||||
|
||||
@
|
||||
@ IRQ stack frame.
|
||||
@
|
||||
#define S_FRAME_SIZE 72
|
||||
|
||||
#define S_OLD_R0 68
|
||||
#define S_PSR 64
|
||||
#define S_PC 60
|
||||
#define S_LR 56
|
||||
#define S_SP 52
|
||||
|
||||
#define S_IP 48
|
||||
#define S_FP 44
|
||||
#define S_R10 40
|
||||
#define S_R9 36
|
||||
#define S_R8 32
|
||||
#define S_R7 28
|
||||
#define S_R6 24
|
||||
#define S_R5 20
|
||||
#define S_R4 16
|
||||
#define S_R3 12
|
||||
#define S_R2 8
|
||||
#define S_R1 4
|
||||
#define S_R0 0
|
||||
|
||||
#define MODE_SVC 0x13
|
||||
#define I_BIT 0x80
|
||||
|
||||
/*
|
||||
* use bad_save_user_regs for abort/prefetch/undef/swi ...
|
||||
* use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
|
||||
*/
|
||||
|
||||
.macro bad_save_user_regs
|
||||
@ carve out a frame on current user stack
|
||||
sub sp, sp, #S_FRAME_SIZE
|
||||
stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12
|
||||
ldr r2, IRQ_STACK_START_IN
|
||||
@ get values for "aborted" pc and cpsr (into parm regs)
|
||||
ldmia r2, {r2 - r3}
|
||||
add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack
|
||||
add r5, sp, #S_SP
|
||||
mov r1, lr
|
||||
stmia r5, {r0 - r3} @ save sp_SVC, lr_SVC, pc, cpsr
|
||||
mov r0, sp @ save current stack into r0 (param register)
|
||||
.endm
|
||||
|
||||
.macro irq_save_user_regs
|
||||
sub sp, sp, #S_FRAME_SIZE
|
||||
stmia sp, {r0 - r12} @ Calling r0-r12
|
||||
@ !!!! R8 NEEDS to be saved !!!! a reserved stack spot would be good.
|
||||
add r8, sp, #S_PC
|
||||
stmdb r8, {sp, lr}^ @ Calling SP, LR
|
||||
str lr, [r8, #0] @ Save calling PC
|
||||
mrs r6, spsr
|
||||
str r6, [r8, #4] @ Save CPSR
|
||||
str r0, [r8, #8] @ Save OLD_R0
|
||||
mov r0, sp
|
||||
.endm
|
||||
|
||||
.macro irq_restore_user_regs
|
||||
ldmia sp, {r0 - lr}^ @ Calling r0 - lr
|
||||
mov r0, r0
|
||||
ldr lr, [sp, #S_PC] @ Get PC
|
||||
add sp, sp, #S_FRAME_SIZE
|
||||
subs pc, lr, #4 @ return & move spsr_svc into cpsr
|
||||
.endm
|
||||
|
||||
.macro get_bad_stack
|
||||
ldr r13, IRQ_STACK_START_IN @ setup our mode stack
|
||||
|
||||
str lr, [r13] @ save caller lr in position 0 of saved stack
|
||||
mrs lr, spsr @ get the spsr
|
||||
str lr, [r13, #4] @ save spsr in position 1 of saved stack
|
||||
mov r13, #MODE_SVC @ prepare SVC-Mode
|
||||
@ msr spsr_c, r13
|
||||
msr spsr, r13 @ switch modes, make sure moves will execute
|
||||
mov lr, pc @ capture return pc
|
||||
movs pc, lr @ jump to next instruction & switch modes.
|
||||
.endm
|
||||
|
||||
.macro get_irq_stack @ setup IRQ stack
|
||||
ldr sp, IRQ_STACK_START
|
||||
.endm
|
||||
|
||||
.macro get_fiq_stack @ setup FIQ stack
|
||||
ldr sp, FIQ_STACK_START
|
||||
.endm
|
||||
|
||||
/*
|
||||
* exception handlers
|
||||
*/
|
||||
|
||||
.align 5
|
||||
undefined_instruction:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
bl do_undefined_instruction
|
||||
|
||||
.align 5
|
||||
software_interrupt:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
bl do_software_interrupt
|
||||
|
||||
.align 5
|
||||
prefetch_abort:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
bl do_prefetch_abort
|
||||
|
||||
.align 5
|
||||
data_abort:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
bl do_data_abort
|
||||
|
||||
.align 5
|
||||
not_used:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
bl do_not_used
|
||||
|
||||
|
||||
.align 5
|
||||
irq:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
bl do_irq
|
||||
|
||||
.align 5
|
||||
fiq:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
bl do_fiq
|
||||
|
||||
#endif /* CONFIG_SPL_BUILD */
|
||||
Reference in New Issue
Block a user