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65cc0e2a65
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
299 lines
6.6 KiB
ArmAsm
299 lines
6.6 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* vectors - Generic ARM exception table code
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*
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* Copyright (c) 1998 Dan Malek <dmalek@jlc.net>
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* Copyright (c) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
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* Copyright (c) 2000 Wolfgang Denk <wd@denx.de>
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* Copyright (c) 2001 Alex Züpke <azu@sysgo.de>
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* Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
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* Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
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* Copyright (c) 2002 Gary Jennejohn <garyj@denx.de>
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* Copyright (c) 2002 Kyle Harris <kharris@nexus-tech.net>
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*/
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#include <config.h>
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/*
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* A macro to allow insertion of an ARM exception vector either
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* for the non-boot0 case or by a boot0-header.
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*/
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.macro ARM_VECTORS
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#ifdef CONFIG_ARCH_K3
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ldr pc, _reset
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#else
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b reset
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#endif
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#if !CONFIG_IS_ENABLED(SYS_NO_VECTOR_TABLE)
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ldr pc, _undefined_instruction
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ldr pc, _software_interrupt
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ldr pc, _prefetch_abort
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ldr pc, _data_abort
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ldr pc, _not_used
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ldr pc, _irq
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ldr pc, _fiq
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#endif
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.endm
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/*
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*************************************************************************
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*
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* Symbol _start is referenced elsewhere, so make it global
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*
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*************************************************************************
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*/
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.globl _start
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/*
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*************************************************************************
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*
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* Vectors have their own section so linker script can map them easily
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*
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*************************************************************************
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*/
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.section ".vectors", "ax"
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#if defined(CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK)
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/*
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* Various SoCs need something special and SoC-specific up front in
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* order to boot, allow them to set that in their boot0.h file and then
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* use it here.
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*
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* To allow a boot0 hook to insert a 'special' sequence after the vector
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* table (e.g. for the socfpga), the presence of a boot0 hook supresses
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* the below vector table and assumes that the vector table is filled in
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* by the boot0 hook. The requirements for a boot0 hook thus are:
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* (1) defines '_start:' as appropriate
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* (2) inserts the vector table using ARM_VECTORS as appropriate
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*/
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#include <asm/arch/boot0.h>
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#else
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/*
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*************************************************************************
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*
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* Exception vectors as described in ARM reference manuals
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*
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* Uses indirect branch to allow reaching handlers anywhere in memory.
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*
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*************************************************************************
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*/
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_start:
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#ifdef CFG_SYS_DV_NOR_BOOT_CFG
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.word CFG_SYS_DV_NOR_BOOT_CFG
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#endif
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ARM_VECTORS
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#endif /* !defined(CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK) */
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#if !CONFIG_IS_ENABLED(SYS_NO_VECTOR_TABLE)
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/*
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*************************************************************************
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*
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* Indirect vectors table
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*
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* Symbols referenced here must be defined somewhere else
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*
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*************************************************************************
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*/
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.globl _reset
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.globl _undefined_instruction
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.globl _software_interrupt
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.globl _prefetch_abort
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.globl _data_abort
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.globl _not_used
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.globl _irq
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.globl _fiq
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#ifdef CONFIG_ARCH_K3
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_reset: .word reset
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#endif
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_undefined_instruction: .word undefined_instruction
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_software_interrupt: .word software_interrupt
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_prefetch_abort: .word prefetch_abort
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_data_abort: .word data_abort
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_not_used: .word not_used
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_irq: .word irq
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_fiq: .word fiq
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.balignl 16,0xdeadbeef
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#endif
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/*
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*************************************************************************
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*
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* Interrupt handling
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*
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*************************************************************************
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*/
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/* SPL interrupt handling: just hang */
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#ifdef CONFIG_SPL_BUILD
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#if !CONFIG_IS_ENABLED(SYS_NO_VECTOR_TABLE)
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.align 5
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undefined_instruction:
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software_interrupt:
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prefetch_abort:
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data_abort:
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not_used:
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irq:
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fiq:
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1:
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b 1b /* hang and never return */
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#endif
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#else /* !CONFIG_SPL_BUILD */
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/* IRQ stack memory (calculated at run-time) + 8 bytes */
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.globl IRQ_STACK_START_IN
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IRQ_STACK_START_IN:
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#ifdef IRAM_BASE_ADDR
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.word IRAM_BASE_ADDR + 0x20
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#else
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.word 0x0badc0de
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#endif
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@
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@ IRQ stack frame.
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@
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#define S_FRAME_SIZE 72
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#define S_OLD_R0 68
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#define S_PSR 64
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#define S_PC 60
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#define S_LR 56
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#define S_SP 52
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#define S_IP 48
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#define S_FP 44
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#define S_R10 40
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#define S_R9 36
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#define S_R8 32
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#define S_R7 28
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#define S_R6 24
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#define S_R5 20
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#define S_R4 16
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#define S_R3 12
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#define S_R2 8
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#define S_R1 4
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#define S_R0 0
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#define MODE_SVC 0x13
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#define I_BIT 0x80
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/*
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* use bad_save_user_regs for abort/prefetch/undef/swi ...
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* use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
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*/
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.macro bad_save_user_regs
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@ carve out a frame on current user stack
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sub sp, sp, #S_FRAME_SIZE
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stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12
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ldr r2, IRQ_STACK_START_IN
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@ get values for "aborted" pc and cpsr (into parm regs)
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ldmia r2, {r2 - r3}
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add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack
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add r5, sp, #S_SP
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mov r1, lr
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stmia r5, {r0 - r3} @ save sp_SVC, lr_SVC, pc, cpsr
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mov r0, sp @ save current stack into r0 (param register)
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.endm
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.macro irq_save_user_regs
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sub sp, sp, #S_FRAME_SIZE
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stmia sp, {r0 - r12} @ Calling r0-r12
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@ !!!! R8 NEEDS to be saved !!!! a reserved stack spot would be good.
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add r8, sp, #S_PC
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stmdb r8, {sp, lr}^ @ Calling SP, LR
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str lr, [r8, #0] @ Save calling PC
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mrs r6, spsr
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str r6, [r8, #4] @ Save CPSR
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str r0, [r8, #8] @ Save OLD_R0
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mov r0, sp
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.endm
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.macro irq_restore_user_regs
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ldmia sp, {r0 - lr}^ @ Calling r0 - lr
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mov r0, r0
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ldr lr, [sp, #S_PC] @ Get PC
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add sp, sp, #S_FRAME_SIZE
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subs pc, lr, #4 @ return & move spsr_svc into cpsr
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.endm
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.macro get_bad_stack
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ldr r13, IRQ_STACK_START_IN @ setup our mode stack
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str lr, [r13] @ save caller lr in position 0 of saved stack
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mrs lr, spsr @ get the spsr
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str lr, [r13, #4] @ save spsr in position 1 of saved stack
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mov r13, #MODE_SVC @ prepare SVC-Mode
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@ msr spsr_c, r13
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msr spsr, r13 @ switch modes, make sure moves will execute
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mov lr, pc @ capture return pc
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movs pc, lr @ jump to next instruction & switch modes.
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.endm
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.macro get_irq_stack @ setup IRQ stack
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ldr sp, IRQ_STACK_START
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.endm
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.macro get_fiq_stack @ setup FIQ stack
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ldr sp, FIQ_STACK_START
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.endm
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/*
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* exception handlers
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*/
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.align 5
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undefined_instruction:
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get_bad_stack
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bad_save_user_regs
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bl do_undefined_instruction
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.align 5
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software_interrupt:
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get_bad_stack
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bad_save_user_regs
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bl do_software_interrupt
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.align 5
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prefetch_abort:
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get_bad_stack
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bad_save_user_regs
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bl do_prefetch_abort
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.align 5
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data_abort:
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get_bad_stack
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bad_save_user_regs
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bl do_data_abort
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.align 5
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not_used:
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get_bad_stack
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bad_save_user_regs
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bl do_not_used
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.align 5
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irq:
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get_bad_stack
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bad_save_user_regs
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bl do_irq
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.align 5
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fiq:
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get_bad_stack
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bad_save_user_regs
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bl do_fiq
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#endif /* CONFIG_SPL_BUILD */
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