61 lines
1.2 KiB
ArmAsm
61 lines
1.2 KiB
ArmAsm
/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <arch/cpu.h>
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#include <offsets_short.h>
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_ASM_FILE_PROLOGUE
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GDATA(z_interrupt_stacks)
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GTEXT(z_do_software_reboot)
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SECTION_FUNC(TEXT,z_do_software_reboot)
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eors r0, r0
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/* move exception table back to 0 */
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ldr r1, =0xe000e000
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str r0, [r1, #0xd08] /* VTOR */
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ldr r0, [r0, #4]
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bx r0
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GTEXT(z_force_exit_one_nested_irq)
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SECTION_FUNC(TEXT,z_force_exit_one_nested_irq)
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ldr r0, =_SCS_ICSR_RETTOBASE
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ldr r1, =_SCS_ICSR
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ldr r1, [r1]
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ands.w r0, r1
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/*
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* If Z flag is set, we are nested, so un-nest one level and get
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* back to this function to unwind the next level; else, exit the
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* last interrupt by jumping to reboot code.
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*/
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ittee eq
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ldreq lr, =0xfffffff1
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ldreq r2, =z_force_exit_one_nested_irq
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ldrne lr, =0xfffffffd
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ldrne r2, =z_do_software_reboot
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ldr ip, =z_interrupt_stacks
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add.w ip, ip, #(___esf_t_SIZEOF * 2) /* enough for a stack frame */
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ldr r1, =0xfffffffe
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and.w r2, r1
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str r2, [ip, #(6 * 4)]
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ldr r2, =0x01000000
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str r2, [ip, #(7 * 4)]
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ite eq
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moveq sp, ip
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msrne PSP, ip
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bx lr
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