arm/mm/proc-arm926.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  *  linux/arch/arm/mm/proc-arm926.S: MMU functions for ARM926EJ-S
5  *  Copyright (C) 1999-2001 ARM Limited
7  *  hacked for non-paged-MM by Hyok S. Choi, 2003.
12  *  CONFIG_CPU_ARM926_CPU_IDLE -> nohlt
20 #include <asm/pgtable-hwdef.h>
23 #include "proc-macros.S"
27  * using the single invalidate entry instructions.  Anything larger
121  *	address space.
150  *	specified address range.
152  *	- start	- start address (inclusive)
153  *	- end	- end address (exclusive)
154  *	- flags	- vm_flags describing address space
163 	mcr	p15, 0, r0, c7, c6, 1		@ invalidate D entry
164 	mcrne	p15, 0, r0, c7, c5, 1		@ invalidate I entry
166 	mcr	p15, 0, r0, c7, c6, 1		@ invalidate D entry
167 	mcrne	p15, 0, r0, c7, c5, 1		@ invalidate I entry
170 	mcr	p15, 0, r0, c7, c14, 1		@ clean and invalidate D entry
171 	mcrne	p15, 0, r0, c7, c5, 1		@ invalidate I entry
173 	mcr	p15, 0, r0, c7, c14, 1		@ clean and invalidate D entry
174 	mcrne	p15, 0, r0, c7, c5, 1		@ invalidate I entry
188  *	region described by start, end.  If you have non-snooping
191  *	- start	- virtual start address
192  *	- end	- virtual end address
204  *	region described by start, end.  If you have non-snooping
207  *	- start	- virtual start address
208  *	- end	- virtual end address
211 	bic	r0, r0, #CACHE_DLINESIZE - 1
212 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
213 	mcr	p15, 0, r0, c7, c5, 1		@ invalidate I entry
228  *	- addr	- kernel address
229  *	- size	- region size
233 1:	mcr	p15, 0, r0, c7, c14, 1		@ clean+invalidate D entry
246  *	Invalidate (discard) the specified virtual address range.
251  *	- start	- virtual start address
252  *	- end	- virtual end address
258 	tst	r0, #CACHE_DLINESIZE - 1
259 	mcrne	p15, 0, r0, c7, c10, 1		@ clean D entry
260 	tst	r1, #CACHE_DLINESIZE - 1
261 	mcrne	p15, 0, r1, c7, c10, 1		@ clean D entry
263 	bic	r0, r0, #CACHE_DLINESIZE - 1
264 1:	mcr	p15, 0, r0, c7, c6, 1		@ invalidate D entry
274  *	Clean the specified virtual address range.
276  *	- start	- virtual start address
277  *	- end	- virtual end address
283 	bic	r0, r0, #CACHE_DLINESIZE - 1
284 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
295  *	Clean and invalidate the specified virtual address range.
297  *	- start	- virtual start address
298  *	- end	- virtual end address
301 	bic	r0, r0, #CACHE_DLINESIZE - 1
304 	mcr	p15, 0, r0, c7, c14, 1		@ clean+invalidate D entry
306 	mcr	p15, 0, r0, c7, c6, 1		@ invalidate D entry
317  *	- start	- kernel virtual start address
318  *	- size	- size of region
319  *	- dir	- DMA direction
331  *	- start	- kernel virtual start address
332  *	- size	- size of region
333  *	- dir	- DMA direction
341 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
390 	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
397 /* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */
402 	stmfd	sp!, {r4 - r6, lr}
406 	stmia	r0, {r4 - r6}
407 	ldmfd	sp!, {r4 - r6, pc}
414 	ldmia	r0, {r4 - r6}
417 	mcr	p15, 0, r1, c2, c0, 0	@ TTB address
434 	mov	r0, #4				@ disable write-back on caches explicitly
447 	.size	__arm926_setup, . - __arm926_setup
461 	@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
468 	string	cpu_arm926_name, "ARM926EJ-S"
476 	.long	0x41069260			@ ARM926EJ-S (v5TEJ)
497 	.size	__arm926_proc_info, . - __arm926_proc_info