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1#ifndef __ASM_ARM_CP15_H
2#define __ASM_ARM_CP15_H
3
4#include <asm/barrier.h>
5
6/*
7 * CR1 bits (CP#15 CR1)
8 */
9#define CR_M (1 << 0) /* MMU enable */
10#define CR_A (1 << 1) /* Alignment abort enable */
11#define CR_C (1 << 2) /* Dcache enable */
12#define CR_W (1 << 3) /* Write buffer enable */
13#define CR_P (1 << 4) /* 32-bit exception handler */
14#define CR_D (1 << 5) /* 32-bit data address range */
15#define CR_L (1 << 6) /* Implementation defined */
16#define CR_B (1 << 7) /* Big endian */
17#define CR_S (1 << 8) /* System MMU protection */
18#define CR_R (1 << 9) /* ROM MMU protection */
19#define CR_F (1 << 10) /* Implementation defined */
20#define CR_Z (1 << 11) /* Implementation defined */
21#define CR_I (1 << 12) /* Icache enable */
22#define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */
23#define CR_RR (1 << 14) /* Round Robin cache replacement */
24#define CR_L4 (1 << 15) /* LDR pc can set T bit */
25#define CR_DT (1 << 16)
26#ifdef CONFIG_MMU
27#define CR_HA (1 << 17) /* Hardware management of Access Flag */
28#else
29#define CR_BR (1 << 17) /* MPU Background region enable (PMSA) */
30#endif
31#define CR_IT (1 << 18)
32#define CR_ST (1 << 19)
33#define CR_FI (1 << 21) /* Fast interrupt (lower latency mode) */
34#define CR_U (1 << 22) /* Unaligned access operation */
35#define CR_XP (1 << 23) /* Extended page tables */
36#define CR_VE (1 << 24) /* Vectored interrupts */
37#define CR_EE (1 << 25) /* Exception (Big) Endian */
38#define CR_TRE (1 << 28) /* TEX remap enable */
39#define CR_AFE (1 << 29) /* Access flag enable */
40#define CR_TE (1 << 30) /* Thumb exception enable */
41
42#ifndef __ASSEMBLY__
43
44#if __LINUX_ARM_ARCH__ >= 4
45#define vectors_high() (cr_alignment & CR_V)
46#else
47#define vectors_high() (0)
48#endif
49
50#ifdef CONFIG_CPU_CP15
51
52extern unsigned long cr_no_alignment; /* defined in entry-armv.S */
53extern unsigned long cr_alignment; /* defined in entry-armv.S */
54
55static inline unsigned int get_cr(void)
56{
57 unsigned int val;
58 asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
59 return val;
60}
61
62static inline void set_cr(unsigned int val)
63{
64 asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR"
65 : : "r" (val) : "cc");
66 isb();
67}
68
69static inline unsigned int get_auxcr(void)
70{
71 unsigned int val;
72 asm("mrc p15, 0, %0, c1, c0, 1 @ get AUXCR" : "=r" (val));
73 return val;
74}
75
76static inline void set_auxcr(unsigned int val)
77{
78 asm volatile("mcr p15, 0, %0, c1, c0, 1 @ set AUXCR"
79 : : "r" (val));
80 isb();
81}
82
83#ifndef CONFIG_SMP
84extern void adjust_cr(unsigned long mask, unsigned long set);
85#endif
86
87#define CPACC_FULL(n) (3 << (n * 2))
88#define CPACC_SVC(n) (1 << (n * 2))
89#define CPACC_DISABLE(n) (0 << (n * 2))
90
91static inline unsigned int get_copro_access(void)
92{
93 unsigned int val;
94 asm("mrc p15, 0, %0, c1, c0, 2 @ get copro access"
95 : "=r" (val) : : "cc");
96 return val;
97}
98
99static inline void set_copro_access(unsigned int val)
100{
101 asm volatile("mcr p15, 0, %0, c1, c0, 2 @ set copro access"
102 : : "r" (val) : "cc");
103 isb();
104}
105
106#else /* ifdef CONFIG_CPU_CP15 */
107
108/*
109 * cr_alignment and cr_no_alignment are tightly coupled to cp15 (at least in the
110 * minds of the developers). Yielding 0 for machines without a cp15 (and making
111 * it read-only) is fine for most cases and saves quite some #ifdeffery.
112 */
113#define cr_no_alignment UL(0)
114#define cr_alignment UL(0)
115
116#endif /* ifdef CONFIG_CPU_CP15 / else */
117
118#endif /* ifndef __ASSEMBLY__ */
119
120#endif