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 */
28ENTRY(__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
331:
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
422:
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
552:
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 */
67ENTRY(__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
711:
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
90