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() (get_cr() & CR_V) 46 #else 47 #define vectors_high() (0) 48 #endif 49 50 #ifdef CONFIG_CPU_CP15 51 52 extern unsigned long cr_alignment; /* defined in entry-armv.S */ 53 54 static inline unsigned long get_cr(void) 55 { 56 unsigned long val; 57 asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc"); 58 return val; 59 } 60 61 static inline void set_cr(unsigned long val) 62 { 63 asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR" 64 : : "r" (val) : "cc"); 65 isb(); 66 } 67 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 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 } 100 101 #else /* ifdef CONFIG_CPU_CP15 */ 102 103 /* 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. 107 */ 108 #define cr_alignment UL(0) 109 110 static inline unsigned long get_cr(void) 111 { 112 return 0; 113 } 114 115 #endif /* ifdef CONFIG_CPU_CP15 / else */ 116 117 #endif /* ifndef __ASSEMBLY__ */ 118 119 #endif 120