[mirror_ubuntu-artful-kernel.git] / arch / unicore32 / mm / tlb-ucv2.S

/*
 * linux/arch/unicore32/mm/tlb-ucv2.S
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 * Copyright (C) 2001-2010 GUAN Xue-tao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/page.h>
#include <asm/tlbflush.h>
#include "proc-macros.S"

/*
 *	__cpu_flush_user_tlb_range(start, end, vma)
 *
 *	Invalidate a range of TLB entries in the specified address space.
 *
 *	- start - start address (may not be aligned)
 *	- end   - end address (exclusive, may not be aligned)
 *	- vma   - vma_struct describing address range
 */
ENTRY(__cpu_flush_user_tlb_range)
#ifndef	CONFIG_CPU_TLB_SINGLE_ENTRY_DISABLE
	mov	r0, r0 >> #PAGE_SHIFT		@ align address
	mov	r0, r0 << #PAGE_SHIFT
	vma_vm_flags r2, r2			@ get vma->vm_flags
1:
	movc	p0.c6, r0, #3
	nop8

	cand.a	r2, #VM_EXEC			@ Executable area ?
	beq	2f

	movc	p0.c6, r0, #5
	nop8
2:
	add	r0, r0, #PAGE_SZ
	csub.a	r0, r1
	beb	1b
#else
	movc	p0.c6, r0, #2
	nop8

	cand.a	r2, #VM_EXEC			@ Executable area ?
	beq	2f

	movc	p0.c6, r0, #4
	nop8
2:
#endif
	mov	pc, lr

/*
 *	__cpu_flush_kern_tlb_range(start,end)
 *
 *	Invalidate a range of kernel TLB entries
 *
 *	- start - start address (may not be aligned)
 *	- end   - end address (exclusive, may not be aligned)
 */
ENTRY(__cpu_flush_kern_tlb_range)
#ifndef	CONFIG_CPU_TLB_SINGLE_ENTRY_DISABLE
	mov	r0, r0 >> #PAGE_SHIFT		@ align address
	mov	r0, r0 << #PAGE_SHIFT
1:
	movc	p0.c6, r0, #3
	nop8

	movc	p0.c6, r0, #5
	nop8

	add	r0, r0, #PAGE_SZ
	csub.a	r0, r1
	beb	1b
#else
	movc	p0.c6, r0, #2
	nop8

	movc	p0.c6, r0, #4
	nop8
#endif
	mov	pc, lr
Commit	Line	Data
10c9c10c G	1	/*
	2	* linux/arch/unicore32/mm/tlb-ucv2.S
	3	*
	4	* Code specific to PKUnity SoC and UniCore ISA
	5	*
	6	* Copyright (C) 2001-2010 GUAN Xue-tao
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12	#include <linux/init.h>
	13	#include <linux/linkage.h>
	14	#include <asm/assembler.h>
	15	#include <asm/page.h>
	16	#include <asm/tlbflush.h>
	17	#include "proc-macros.S"
	18
	19	/*
	20	* __cpu_flush_user_tlb_range(start, end, vma)
	21	*
	22	* Invalidate a range of TLB entries in the specified address space.
	23	*
	24	* - start - start address (may not be aligned)
	25	* - end - end address (exclusive, may not be aligned)
	26	* - vma - vma_struct describing address range
	27	*/
	28	ENTRY(__cpu_flush_user_tlb_range)
	29	#ifndef CONFIG_CPU_TLB_SINGLE_ENTRY_DISABLE
	30	mov r0, r0 >> #PAGE_SHIFT @ align address
	31	mov r0, r0 << #PAGE_SHIFT
	32	vma_vm_flags r2, r2 @ get vma->vm_flags
	33	1:
	34	movc p0.c6, r0, #3
	35	nop8
	36
	37	cand.a r2, #VM_EXEC @ Executable area ?
	38	beq 2f
	39
	40	movc p0.c6, r0, #5
	41	nop8
	42	2:
	43	add r0, r0, #PAGE_SZ
	44	csub.a r0, r1
	45	beb 1b
	46	#else
	47	movc p0.c6, r0, #2
	48	nop8
	49
	50	cand.a r2, #VM_EXEC @ Executable area ?
	51	beq 2f
	52
	53	movc p0.c6, r0, #4
	54	nop8
	55	2:
	56	#endif
	57	mov pc, lr
	58
	59	/*
	60	* __cpu_flush_kern_tlb_range(start,end)
	61	*
	62	* Invalidate a range of kernel TLB entries
	63	*
	64	* - start - start address (may not be aligned)
65	* - end - end address (exclusive, may not be aligned)
66	*/
67	ENTRY(__cpu_flush_kern_tlb_range)
68	#ifndef CONFIG_CPU_TLB_SINGLE_ENTRY_DISABLE
69	mov r0, r0 >> #PAGE_SHIFT @ align address
70	mov r0, r0 << #PAGE_SHIFT
71	1:
72	movc p0.c6, r0, #3
73	nop8
74
75	movc p0.c6, r0, #5
76	nop8
77
78	add r0, r0, #PAGE_SZ
79	csub.a r0, r1
80	beb 1b
81	#else
82	movc p0.c6, r0, #2
83	nop8
84
85	movc p0.c6, r0, #4
86	nop8
87	#endif
88	mov pc, lr
89