arm/kernel/entry-v7m.S

1 /* SPDX-License-Identifier: GPL-2.0-only */
3  * linux/arch/arm/kernel/entry-v7m.S
7  * Low-level vector interface routines for the ARMv7-M architecture
14 #include "entry-header.S"
17 #error "CONFIG_TRACE_IRQFLAGS not supported on the current ARMv7M implementation"
77 	@ registers r0-r3 and r12 are automatically restored on exception
78 	@ return. r4-r7 were not clobbered in v7m_exception_entry so for
79 	@ correctness they don't need to be restored. So only r8-r11 must be
80 	@ restored here. The easiest way to do so is to restore r0-r7, too.
81 	ldmia	sp!, {r0-r11}
82 	add	sp, #PT_REGS_SIZE-S_IP
101  * Register switch for ARMv7-M processors.
109 	stmia	ip!, {r4 - r11}		@ Store most regs on stack
120 	ldmia	r4, {r4 - r12, lr}	@ Load all regs saved previously
138 	.long	0			@ 0 - Reset stack pointer
139 	.long	__invalid_entry		@ 1 - Reset
140 	.long	__invalid_entry		@ 2 - NMI
141 	.long	__invalid_entry		@ 3 - HardFault
142 	.long	__invalid_entry		@ 4 - MemManage
143 	.long	__invalid_entry		@ 5 - BusFault
144 	.long	__invalid_entry		@ 6 - UsageFault
145 	.long	__invalid_entry		@ 7 - Reserved
146 	.long	__invalid_entry		@ 8 - Reserved
147 	.long	__invalid_entry		@ 9 - Reserved
148 	.long	__invalid_entry		@ 10 - Reserved
149 	.long	vector_swi		@ 11 - SVCall
150 	.long	__invalid_entry		@ 12 - Debug Monitor
151 	.long	__invalid_entry		@ 13 - Reserved
152 	.long	__pendsv_entry		@ 14 - PendSV
153 	.long	__invalid_entry		@ 15 - SysTick