arm/mm/proc-v6.S

1 /* SPDX-License-Identifier: GPL-2.0-only */
3  *  linux/arch/arm/mm/proc-v6.S
8  *  This is the "shell" of the ARMv6 processor support.
14 #include <asm/asm-offsets.h>
16 #include <asm/pgtable-hwdef.h>
18 #include "proc-macros.S"
54  *	- loc   - location to jump to for soft reset
71  *	Idle the processor (eg, wait for interrupt).
77 	mcr	p15, 0, r1, c7, c10, 4		@ DWB - WFI may enter a low-power mode
93  *	- pgd_phys - physical address of new TTB
96  *	- we are not using split page tables
101 	mmid	r1, r1				@ get mm->context.id
122  *	- ptep  - pointer to level 2 translation table entry
123  *		  (hardware version is stored at -1024 bytes)
124  *	- pte   - PTE value to store
125  *	- ext	- value for extended PTE bits
135 /* Suspend/resume support: taken from arch/arm/mach-s3c64xx/sleep.S */
140 	stmfd	sp!, {r4 - r9, lr}
147 	mrc	p15, 0, r8, c1, c0, 2	@ co-processor access control
149 	stmia	r0, {r4 - r9}
150 	ldmfd	sp!, {r4- r9, pc}
160 	ldmia	r0, {r4 - r9}
171 	mcr	p15, 0, r8, c1, c0, 2	@ co-processor access control
178 	string	cpu_v6_name, "ARMv6-compatible processor"
195  *	- cache type register is implemented
223  ARM_BE8(orr	r6, r6, #1 << 25)		@ big-endian page tables
230 	 * corruption with hit-under-miss enabled). The conditional code below
232 	 * and the FI bit in the control register) disables hit-under-miss
233 	 * without putting the processor into full low interrupt latency mode.
236 	mrc	p15, 0, r5, c0, c0, 0		@ get processor id
257 	@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
269 	 * Match any ARMv6 processor core.
299 	.size	__v6_proc_info, . - __v6_proc_info