1 /* 2 * (C) Copyright 2010 3 * Texas Instruments, <www.ti.com> 4 * Aneesh V <aneesh@ti.com> 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 #ifndef ARMV7_H 9 #define ARMV7_H 10 11 /* Cortex-A9 revisions */ 12 #define MIDR_CORTEX_A9_R0P1 0x410FC091 13 #define MIDR_CORTEX_A9_R1P2 0x411FC092 14 #define MIDR_CORTEX_A9_R1P3 0x411FC093 15 #define MIDR_CORTEX_A9_R2P10 0x412FC09A 16 17 /* Cortex-A15 revisions */ 18 #define MIDR_CORTEX_A15_R0P0 0x410FC0F0 19 #define MIDR_CORTEX_A15_R2P2 0x412FC0F2 20 21 /* Cortex-A7 revisions */ 22 #define MIDR_CORTEX_A7_R0P0 0x410FC070 23 24 #define MIDR_PRIMARY_PART_MASK 0xFF0FFFF0 25 26 /* ID_PFR1 feature fields */ 27 #define CPUID_ARM_SEC_SHIFT 4 28 #define CPUID_ARM_SEC_MASK (0xF << CPUID_ARM_SEC_SHIFT) 29 #define CPUID_ARM_VIRT_SHIFT 12 30 #define CPUID_ARM_VIRT_MASK (0xF << CPUID_ARM_VIRT_SHIFT) 31 #define CPUID_ARM_GENTIMER_SHIFT 16 32 #define CPUID_ARM_GENTIMER_MASK (0xF << CPUID_ARM_GENTIMER_SHIFT) 33 34 /* valid bits in CBAR register / PERIPHBASE value */ 35 #define CBAR_MASK 0xFFFF8000 36 37 /* CCSIDR */ 38 #define CCSIDR_LINE_SIZE_OFFSET 0 39 #define CCSIDR_LINE_SIZE_MASK 0x7 40 #define CCSIDR_ASSOCIATIVITY_OFFSET 3 41 #define CCSIDR_ASSOCIATIVITY_MASK (0x3FF << 3) 42 #define CCSIDR_NUM_SETS_OFFSET 13 43 #define CCSIDR_NUM_SETS_MASK (0x7FFF << 13) 44 45 /* 46 * Values for InD field in CSSELR 47 * Selects the type of cache 48 */ 49 #define ARMV7_CSSELR_IND_DATA_UNIFIED 0 50 #define ARMV7_CSSELR_IND_INSTRUCTION 1 51 52 /* Values for Ctype fields in CLIDR */ 53 #define ARMV7_CLIDR_CTYPE_NO_CACHE 0 54 #define ARMV7_CLIDR_CTYPE_INSTRUCTION_ONLY 1 55 #define ARMV7_CLIDR_CTYPE_DATA_ONLY 2 56 #define ARMV7_CLIDR_CTYPE_INSTRUCTION_DATA 3 57 #define ARMV7_CLIDR_CTYPE_UNIFIED 4 58 59 #ifndef __ASSEMBLY__ 60 #include <linux/types.h> 61 #include <asm/io.h> 62 63 /* 64 * CP15 Barrier instructions 65 * Please note that we have separate barrier instructions in ARMv7 66 * However, we use the CP15 based instructtions because we use 67 * -march=armv5 in U-Boot 68 */ 69 #define CP15ISB asm volatile ("mcr p15, 0, %0, c7, c5, 4" : : "r" (0)) 70 #define CP15DSB asm volatile ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)) 71 #define CP15DMB asm volatile ("mcr p15, 0, %0, c7, c10, 5" : : "r" (0)) 72 73 #ifdef __ARM_ARCH_7A__ 74 #define ISB asm volatile ("isb" : : : "memory") 75 #define DSB asm volatile ("dsb" : : : "memory") 76 #define DMB asm volatile ("dmb" : : : "memory") 77 #else 78 #define ISB CP15ISB 79 #define DSB CP15DSB 80 #define DMB CP15DMB 81 #endif 82 83 /* 84 * Workaround for ARM errata # 798870 85 * Set L2ACTLR[7] to reissue any memory transaction in the L2 that has been 86 * stalled for 1024 cycles to verify that its hazard condition still exists. 87 */ 88 static inline void v7_enable_l2_hazard_detect(void) 89 { 90 uint32_t val; 91 92 /* L2ACTLR[7]: Enable hazard detect timeout */ 93 asm volatile ("mrc p15, 1, %0, c15, c0, 0\n\t" : "=r"(val)); 94 val |= (1 << 7); 95 asm volatile ("mcr p15, 1, %0, c15, c0, 0\n\t" : : "r"(val)); 96 } 97 98 /* 99 * Workaround for ARM errata # 799270 100 * Ensure that the L2 logic has been used within the previous 256 cycles 101 * before modifying the ACTLR.SMP bit. This is required during boot before 102 * MMU has been enabled, or during a specified reset or power down sequence. 103 */ 104 static inline void v7_enable_smp(uint32_t address) 105 { 106 uint32_t temp, val; 107 108 /* Read auxiliary control register */ 109 asm volatile ("mrc p15, 0, %0, c1, c0, 1\n\t" : "=r"(val)); 110 111 /* Enable SMP */ 112 val |= (1 << 6); 113 114 /* Dummy read to assure L2 access */ 115 temp = readl(address); 116 temp &= 0; 117 val |= temp; 118 119 /* Write auxiliary control register */ 120 asm volatile ("mcr p15, 0, %0, c1, c0, 1\n\t" : : "r"(val)); 121 122 CP15DSB; 123 CP15ISB; 124 } 125 126 void v7_en_l2_hazard_detect(void); 127 void v7_outer_cache_enable(void); 128 void v7_outer_cache_disable(void); 129 void v7_outer_cache_flush_all(void); 130 void v7_outer_cache_inval_all(void); 131 void v7_outer_cache_flush_range(u32 start, u32 end); 132 void v7_outer_cache_inval_range(u32 start, u32 end); 133 134 #if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT) 135 136 int armv7_init_nonsec(void); 137 bool armv7_boot_nonsec(void); 138 139 /* defined in assembly file */ 140 unsigned int _nonsec_init(void); 141 void _do_nonsec_entry(void *target_pc, unsigned long r0, 142 unsigned long r1, unsigned long r2); 143 void _smp_pen(void); 144 145 extern char __secure_start[]; 146 extern char __secure_end[]; 147 148 #endif /* CONFIG_ARMV7_NONSEC || CONFIG_ARMV7_VIRT */ 149 150 void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr, 151 u32 cpu_rev_comb, u32 cpu_variant, 152 u32 cpu_rev); 153 void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb, 154 u32 cpu_variant, u32 cpu_rev); 155 #endif /* ! __ASSEMBLY__ */ 156 157 #endif 158