arm/mm/proc-arm922.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  *  linux/arch/arm/mm/proc-arm922.S: MMU functions for ARM922
8  *  hacked for non-paged-MM by Hyok S. Choi, 2003.
13  *  CONFIG_CPU_ARM922_CPU_IDLE -> nohlt
21 #include <asm/pgtable-hwdef.h>
24 #include "proc-macros.S"
72  * Perform a soft reset of the system.  Put the CPU into the
76  * loc: location to jump to for soft reset
81 	mov	ip, #0
82 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
83 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
85 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
87 	mrc	p15, 0, ip, c1, c0, 0		@ ctrl register
88 	bic	ip, ip, #0x000f			@ ............wcam
89 	bic	ip, ip, #0x1100			@ ...i...s........
90 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
132 	mov	ip, #0
134 	mov	r1, #(CACHE_DSEGMENTS - 1) << 5	@ 8 segments
135 1:	orr	r3, r1, #(CACHE_DENTRIES - 1) << 26 @ 64 entries
142 	mcrne	p15, 0, ip, c7, c5, 0		@ invalidate I cache
143 	mcrne	p15, 0, ip, c7, c10, 4		@ drain WB
153  *	- start	- start address (inclusive)
154  *	- end	- end address (exclusive)
155  *	- flags	- vm_flags describing address space
158 	mov	ip, #0
170 	mcrne	p15, 0, ip, c7, c10, 4		@ drain WB
178  *	region described by start, end.  If you have non-snooping
181  *	- start	- virtual start address
182  *	- end	- virtual end address
194  *	region described by start, end.  If you have non-snooping
197  *	- start	- virtual start address
198  *	- end	- virtual end address
201 	bic	r0, r0, #CACHE_DLINESIZE - 1
218  *	- addr	- kernel address
219  *	- size	- region size
241  *	- start	- virtual start address
242  *	- end	- virtual end address
247 	tst	r0, #CACHE_DLINESIZE - 1
248 	bic	r0, r0, #CACHE_DLINESIZE - 1
250 	tst	r1, #CACHE_DLINESIZE - 1
264  *	- start	- virtual start address
265  *	- end	- virtual end address
270 	bic	r0, r0, #CACHE_DLINESIZE - 1
283  *	- start	- virtual start address
284  *	- end	- virtual end address
287 	bic	r0, r0, #CACHE_DLINESIZE - 1
298  *	- start	- kernel virtual start address
299  *	- size	- size of region
300  *	- dir	- DMA direction
312  *	- start	- kernel virtual start address
313  *	- size	- size of region
314  *	- dir	- DMA direction
344 	mov	ip, #0
346 	mcr	p15, 0, ip, c7, c6, 0		@ invalidate D cache
349 @ && Re-written to use Index Ops.
350 @ && Uses registers r1, r3 and ip
352 	mov	r1, #(CACHE_DSEGMENTS - 1) << 5	@ 4 segments
353 1:	orr	r3, r1, #(CACHE_DENTRIES - 1) << 26 @ 64 entries
360 	mcr	p15, 0, ip, c7, c5, 0		@ invalidate I cache
361 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
363 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
398 	.size	__arm922_setup, . - __arm922_setup
411 	@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
451 	.size	__arm922_proc_info, . - __arm922_proc_info