]>
Commit | Line | Data |
---|---|---|
15d07dc9 RK |
1 | #ifndef __ASM_ARM_CP15_H |
2 | #define __ASM_ARM_CP15_H | |
3 | ||
9f97da78 | 4 | #include <asm/barrier.h> |
15d07dc9 RK |
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) | |
aca7e592 JA |
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 | |
15d07dc9 RK |
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 | |
4585eaff | 45 | #define vectors_high() (get_cr() & CR_V) |
15d07dc9 RK |
46 | #else |
47 | #define vectors_high() (0) | |
48 | #endif | |
49 | ||
b849a60e UKK |
50 | #ifdef CONFIG_CPU_CP15 |
51 | ||
15d07dc9 RK |
52 | extern unsigned long cr_alignment; /* defined in entry-armv.S */ |
53 | ||
7668fd57 | 54 | static inline unsigned long get_cr(void) |
15d07dc9 | 55 | { |
7668fd57 | 56 | unsigned long val; |
15d07dc9 RK |
57 | asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc"); |
58 | return val; | |
59 | } | |
60 | ||
7668fd57 | 61 | static inline void set_cr(unsigned long val) |
15d07dc9 RK |
62 | { |
63 | asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR" | |
64 | : : "r" (val) : "cc"); | |
65 | isb(); | |
66 | } | |
67 | ||
bbc8d77d RH |
68 | static inline unsigned int get_auxcr(void) |
69 | { | |
70 | unsigned int val; | |
71 | asm("mrc p15, 0, %0, c1, c0, 1 @ get AUXCR" : "=r" (val)); | |
72 | return val; | |
73 | } | |
74 | ||
75 | static inline void set_auxcr(unsigned int val) | |
76 | { | |
77 | asm volatile("mcr p15, 0, %0, c1, c0, 1 @ set AUXCR" | |
78 | : : "r" (val)); | |
79 | isb(); | |
80 | } | |
81 | ||
15d07dc9 RK |
82 | #define CPACC_FULL(n) (3 << (n * 2)) |
83 | #define CPACC_SVC(n) (1 << (n * 2)) | |
84 | #define CPACC_DISABLE(n) (0 << (n * 2)) | |
85 | ||
86 | static inline unsigned int get_copro_access(void) | |
87 | { | |
88 | unsigned int val; | |
89 | asm("mrc p15, 0, %0, c1, c0, 2 @ get copro access" | |
90 | : "=r" (val) : : "cc"); | |
91 | return val; | |
92 | } | |
93 | ||
94 | static inline void set_copro_access(unsigned int val) | |
95 | { | |
96 | asm volatile("mcr p15, 0, %0, c1, c0, 2 @ set copro access" | |
97 | : : "r" (val) : "cc"); | |
98 | isb(); | |
99 | } | |
100 | ||
b849a60e UKK |
101 | #else /* ifdef CONFIG_CPU_CP15 */ |
102 | ||
103 | /* | |
0aeb3408 RK |
104 | * cr_alignment is tightly coupled to cp15 (at least in the minds of the |
105 | * developers). Yielding 0 for machines without a cp15 (and making it | |
106 | * read-only) is fine for most cases and saves quite some #ifdeffery. | |
b849a60e | 107 | */ |
b849a60e UKK |
108 | #define cr_alignment UL(0) |
109 | ||
4585eaff RK |
110 | static inline unsigned long get_cr(void) |
111 | { | |
112 | return 0; | |
113 | } | |
114 | ||
b849a60e UKK |
115 | #endif /* ifdef CONFIG_CPU_CP15 / else */ |
116 | ||
117 | #endif /* ifndef __ASSEMBLY__ */ | |
15d07dc9 RK |
118 | |
119 | #endif |