arm/mm/cache-fa.S

1 /* SPDX-License-Identifier: GPL-2.0-only */
3  *  linux/arch/arm/mm/cache-fa.S
6  *  Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
8  * Based on cache-v4wb.S:
9  *  Copyright (C) 1997-2002 Russell king
18 #include "proc-macros.S"
69 	mcrne	p15, 0, ip, c7, c10, 4		@ drain write buffer
79  *	- start - start address (inclusive, page aligned)
80  *	- end	- end address (exclusive, page aligned)
81  *	- flags	- vma_area_struct flags describing address space
97 	mcrne	p15, 0, ip, c7, c10, 4		@ data write barrier
105  *	region described by start.  If you have non-snooping
108  *	- start  - virtual start address
109  *	- end	 - virtual end address
118  *	region described by start.  If you have non-snooping
121  *	- start  - virtual start address
122  *	- end	 - virtual end address
125 	bic	r0, r0, #CACHE_DLINESIZE - 1
133 	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer
140  *	Ensure that the data held in the page kaddr is written back
143  *	- addr	- kernel address
144  *	- size	- size of region
154 	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer
161  *	May not write back any entries.  If 'start' or 'end'
163  *	back.
165  *	- start  - virtual start address
166  *	- end	 - virtual end address
169 	tst	r0, #CACHE_DLINESIZE - 1
170 	bic	r0, r0, #CACHE_DLINESIZE - 1
172 	tst	r1, #CACHE_DLINESIZE - 1
173 	bic	r1, r1, #CACHE_DLINESIZE - 1
180 	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer
186  *	Clean (write back) the specified virtual address range.
188  *	- start  - virtual start address
189  *	- end	 - virtual end address
192 	bic	r0, r0, #CACHE_DLINESIZE - 1
198 	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer
203  *	- start   - virtual start address of region
204  *	- end     - virtual end address of region
207 	bic	r0, r0, #CACHE_DLINESIZE - 1
213 	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer
218  *	- start	- kernel virtual start address
219  *	- size	- size of region
220  *	- dir	- DMA direction
232  *	- start	- kernel virtual start address
233  *	- size	- size of region
234  *	- dir	- DMA direction
245 	@ define struct cpu_cache_fns (see <asm/cacheflush.h> and proc-macros.S)