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 #define CR_IT (1 << 18) 27 #define CR_ST (1 << 19) 28 #define CR_FI (1 << 21) /* Fast interrupt (lower latency mode) */ 29 #define CR_U (1 << 22) /* Unaligned access operation */ 30 #define CR_XP (1 << 23) /* Extended page tables */ 31 #define CR_VE (1 << 24) /* Vectored interrupts */ 32 #define CR_EE (1 << 25) /* Exception (Big) Endian */ 33 #define CR_TRE (1 << 28) /* TEX remap enable */ 34 #define CR_AFE (1 << 29) /* Access flag enable */ 35 #define CR_TE (1 << 30) /* Thumb exception enable */ 36 37 #ifndef __ASSEMBLY__ 38 39 #if __LINUX_ARM_ARCH__ >= 4 40 #define vectors_high() (cr_alignment & CR_V) 41 #else 42 #define vectors_high() (0) 43 #endif 44 45 #ifdef CONFIG_CPU_CP15 46 47 extern unsigned long cr_no_alignment; /* defined in entry-armv.S */ 48 extern unsigned long cr_alignment; /* defined in entry-armv.S */ 49 50 static inline unsigned int get_cr(void) 51 { 52 unsigned int val; 53 asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc"); 54 return val; 55 } 56 57 static inline void set_cr(unsigned int val) 58 { 59 asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR" 60 : : "r" (val) : "cc"); 61 isb(); 62 } 63 64 #ifndef CONFIG_SMP 65 extern void adjust_cr(unsigned long mask, unsigned long set); 66 #endif 67 68 #define CPACC_FULL(n) (3 << (n * 2)) 69 #define CPACC_SVC(n) (1 << (n * 2)) 70 #define CPACC_DISABLE(n) (0 << (n * 2)) 71 72 static inline unsigned int get_copro_access(void) 73 { 74 unsigned int val; 75 asm("mrc p15, 0, %0, c1, c0, 2 @ get copro access" 76 : "=r" (val) : : "cc"); 77 return val; 78 } 79 80 static inline void set_copro_access(unsigned int val) 81 { 82 asm volatile("mcr p15, 0, %0, c1, c0, 2 @ set copro access" 83 : : "r" (val) : "cc"); 84 isb(); 85 } 86 87 #else /* ifdef CONFIG_CPU_CP15 */ 88 89 /* 90 * cr_alignment and cr_no_alignment are tightly coupled to cp15 (at least in the 91 * minds of the developers). Yielding 0 for machines without a cp15 (and making 92 * it read-only) is fine for most cases and saves quite some #ifdeffery. 93 */ 94 #define cr_no_alignment UL(0) 95 #define cr_alignment UL(0) 96 97 #endif /* ifdef CONFIG_CPU_CP15 / else */ 98 99 #endif /* ifndef __ASSEMBLY__ */ 100 101 #endif 102