Russell King | 15d07dc | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 1 | #ifndef __ASM_ARM_CP15_H |
| 2 | #define __ASM_ARM_CP15_H |
| 3 | |
David Howells | 9f97da7 | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 4 | #include <asm/barrier.h> |
Russell King | 15d07dc | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 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) |
Jonathan Austin | aca7e59 | 2013-02-21 15:21:34 +0000 | [diff] [blame] | 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 |
Russell King | 15d07dc | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 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 | |
Uwe Kleine-König | b849a60 | 2012-01-16 10:34:31 +0100 | [diff] [blame] | 50 | #ifdef CONFIG_CPU_CP15 |
| 51 | |
Russell King | 15d07dc | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 52 | extern unsigned long cr_no_alignment; /* defined in entry-armv.S */ |
| 53 | extern unsigned long cr_alignment; /* defined in entry-armv.S */ |
| 54 | |
| 55 | static 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 | |
| 62 | static 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 | |
Rob Herring | bbc8d77 | 2013-01-16 17:57:33 -0600 | [diff] [blame] | 69 | static 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 | |
| 76 | static 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 | |
Russell King | 15d07dc | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 83 | #ifndef CONFIG_SMP |
| 84 | extern 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 | |
| 91 | static 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 | |
| 99 | static 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 | |
Uwe Kleine-König | b849a60 | 2012-01-16 10:34:31 +0100 | [diff] [blame] | 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__ */ |
Russell King | 15d07dc | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 119 | |
| 120 | #endif |