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"
42 ENTRY(fa_flush_icache_all)
51  *	Clean and invalidate all cache entries in a particular address
54 ENTRY(fa_flush_user_cache_all)
61 ENTRY(fa_flush_kern_cache_all)
77  *	address space.
79  *	- start - start address (inclusive, page aligned)
80  *	- end	- end address (exclusive, page aligned)
81  *	- flags	- vma_area_struct flags describing address space
83 ENTRY(fa_flush_user_cache_range)
91 	mcr	p15, 0, r0, c7, c14, 1		@ clean and invalidate D entry
105  *	region described by start.  If you have non-snooping
108  *	- start  - virtual start address
109  *	- end	 - virtual end address
111 ENTRY(fa_coherent_kern_range)
118  *	region described by start.  If you have non-snooping
121  *	- start  - virtual start address
122  *	- end	 - virtual end address
124 ENTRY(fa_coherent_user_range)
125 	bic	r0, r0, #CACHE_DLINESIZE - 1
126 1:	mcr	p15, 0, r0, c7, c14, 1		@ clean and invalidate D entry
127 	mcr	p15, 0, r0, c7, c5, 1		@ invalidate I entry
143  *	- addr	- kernel address
144  *	- size	- size of region
146 ENTRY(fa_flush_kern_dcache_area)
160  *	Invalidate (discard) the specified virtual address range.
165  *	- start  - virtual start address
166  *	- end	 - virtual end address
169 	tst	r0, #CACHE_DLINESIZE - 1
170 	bic	r0, r0, #CACHE_DLINESIZE - 1
171 	mcrne	p15, 0, r0, c7, c14, 1		@ clean & invalidate D entry
172 	tst	r1, #CACHE_DLINESIZE - 1
173 	bic	r1, r1, #CACHE_DLINESIZE - 1
174 	mcrne	p15, 0, r1, c7, c14, 1		@ clean & invalidate D entry
175 1:	mcr	p15, 0, r0, c7, c6, 1		@ invalidate D entry
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
193 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
203  *	- start   - virtual start address of region
204  *	- end     - virtual end address of region
206 ENTRY(fa_dma_flush_range)
207 	bic	r0, r0, #CACHE_DLINESIZE - 1
208 1:	mcr	p15, 0, r0, c7, c14, 1		@ clean & invalidate D entry
218  *	- start	- kernel virtual start address
219  *	- size	- size of region
220  *	- dir	- DMA direction
222 ENTRY(fa_dma_map_area)
232  *	- start	- kernel virtual start address
233  *	- size	- size of region
234  *	- dir	- DMA direction
236 ENTRY(fa_dma_unmap_area)
245 	@ define struct cpu_cache_fns (see <asm/cacheflush.h> and proc-macros.S)