[linux-block.git] / arch / arm / mm / tlb-v4wb.S

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 *  linux/arch/arm/mm/tlbv4wb.S
 *
 *  Copyright (C) 1997-2002 Russell King
 *
 *  ARM architecture version 4 TLB handling functions.
 *  These assume a split I/D TLBs w/o I TLB entry, with a write buffer.
 *
 *  Processors: SA110 SA1100 SA1110
 */
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/cfi_types.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/tlbflush.h>
#include "proc-macros.S"

	.align	5
/*
 *	v4wb_flush_user_tlb_range(start, end, mm)
 *
 *	Invalidate a range of TLB entries in the specified address space.
 *
 *	- start - range start address
 *	- end   - range end address
 *	- mm    - mm_struct describing address space
 */
	.align	5
SYM_TYPED_FUNC_START(v4wb_flush_user_tlb_range)
	vma_vm_mm ip, r2
	act_mm	r3				@ get current->active_mm
	eors	r3, ip, r3				@ == mm ?
	retne	lr				@ no, we dont do anything
	vma_vm_flags r2, r2
	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
	tst	r2, #VM_EXEC
	mcrne	p15, 0, r3, c8, c5, 0		@ invalidate I TLB
	bic	r0, r0, #0x0ff
	bic	r0, r0, #0xf00
1:	mcr	p15, 0, r0, c8, c6, 1		@ invalidate D TLB entry
	add	r0, r0, #PAGE_SZ
	cmp	r0, r1
	blo	1b
	ret	lr
SYM_FUNC_END(v4wb_flush_user_tlb_range)

/*
 *	v4_flush_kern_tlb_range(start, end)
 *
 *	Invalidate a range of TLB entries in the specified kernel
 *	address range.
 *
 *	- start - virtual address (may not be aligned)
 *	- end   - virtual address (may not be aligned)
 */
SYM_TYPED_FUNC_START(v4wb_flush_kern_tlb_range)
	mov	r3, #0
	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
	bic	r0, r0, #0x0ff
	bic	r0, r0, #0xf00
	mcr	p15, 0, r3, c8, c5, 0		@ invalidate I TLB
1:	mcr	p15, 0, r0, c8, c6, 1		@ invalidate D TLB entry
	add	r0, r0, #PAGE_SZ
	cmp	r0, r1
	blo	1b
	ret	lr
SYM_FUNC_END(v4wb_flush_kern_tlb_range)
Commit	Line	Data
d2912cb1	1	/* SPDX-License-Identifier: GPL-2.0-only */
1da177e4 LT	2	/*
	3	* linux/arch/arm/mm/tlbv4wb.S
	4	*
	5	* Copyright (C) 1997-2002 Russell King
	6	*
1da177e4 LT	7	* ARM architecture version 4 TLB handling functions.
	8	* These assume a split I/D TLBs w/o I TLB entry, with a write buffer.
	9	*
	10	* Processors: SA110 SA1100 SA1110
	11	*/
	12	#include <linux/linkage.h>
	13	#include <linux/init.h>
6b0ef279	14	#include <linux/cfi_types.h>
6ebbf2ce	15	#include <asm/assembler.h>
e6ae744d	16	#include <asm/asm-offsets.h>
1da177e4 LT	17	#include <asm/tlbflush.h>
	18	#include "proc-macros.S"
	19
	20	.align 5
	21	/*
	22	* v4wb_flush_user_tlb_range(start, end, mm)
	23	*
	24	* Invalidate a range of TLB entries in the specified address space.
	25	*
	26	* - start - range start address
	27	* - end - range end address
	28	* - mm - mm_struct describing address space
	29	*/
	30	.align 5
6b0ef279	31	SYM_TYPED_FUNC_START(v4wb_flush_user_tlb_range)
1da177e4 LT	32	vma_vm_mm ip, r2
	33	act_mm r3 @ get current->active_mm
	34	eors r3, ip, r3 @ == mm ?
6ebbf2ce	35	retne lr @ no, we dont do anything
1da177e4 LT	36	vma_vm_flags r2, r2
	37	mcr p15, 0, r3, c7, c10, 4 @ drain WB
	38	tst r2, #VM_EXEC
	39	mcrne p15, 0, r3, c8, c5, 0 @ invalidate I TLB
	40	bic r0, r0, #0x0ff
	41	bic r0, r0, #0xf00
	42	1: mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
	43	add r0, r0, #PAGE_SZ
	44	cmp r0, r1
	45	blo 1b
6ebbf2ce	46	ret lr
6b0ef279	47	SYM_FUNC_END(v4wb_flush_user_tlb_range)
1da177e4 LT	48
	49	/*
	50	* v4_flush_kern_tlb_range(start, end)
	51	*
	52	* Invalidate a range of TLB entries in the specified kernel
	53	* address range.
	54	*
	55	* - start - virtual address (may not be aligned)
	56	* - end - virtual address (may not be aligned)
	57	*/
6b0ef279	58	SYM_TYPED_FUNC_START(v4wb_flush_kern_tlb_range)
1da177e4 LT	59	mov r3, #0
	60	mcr p15, 0, r3, c7, c10, 4 @ drain WB
	61	bic r0, r0, #0x0ff
	62	bic r0, r0, #0xf00
	63	mcr p15, 0, r3, c8, c5, 0 @ invalidate I TLB
	64	1: mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
	65	add r0, r0, #PAGE_SZ
	66	cmp r0, r1
	67	blo 1b
6ebbf2ce	68	ret lr
6b0ef279	69	SYM_FUNC_END(v4wb_flush_kern_tlb_range)