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 #include <asm/barriers.h> 63 64 /* read L2 control register (L2CTLR) */ 65 static inline uint32_t read_l2ctlr(void) 66 { 67 uint32_t val = 0; 68 69 asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val)); 70 71 return val; 72 } 73 74 /* write L2 control register (L2CTLR) */ 75 static inline void write_l2ctlr(uint32_t val) 76 { 77 /* 78 * Note: L2CTLR can only be written when the L2 memory system 79 * is idle, ie before the MMU is enabled. 80 */ 81 asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory"); 82 isb(); 83 } 84 85 /* 86 * Workaround for ARM errata # 798870 87 * Set L2ACTLR[7] to reissue any memory transaction in the L2 that has been 88 * stalled for 1024 cycles to verify that its hazard condition still exists. 89 */ 90 static inline void v7_enable_l2_hazard_detect(void) 91 { 92 uint32_t val; 93 94 /* L2ACTLR[7]: Enable hazard detect timeout */ 95 asm volatile ("mrc p15, 1, %0, c15, c0, 0\n\t" : "=r"(val)); 96 val |= (1 << 7); 97 asm volatile ("mcr p15, 1, %0, c15, c0, 0\n\t" : : "r"(val)); 98 } 99 100 /* 101 * Workaround for ARM errata # 799270 102 * Ensure that the L2 logic has been used within the previous 256 cycles 103 * before modifying the ACTLR.SMP bit. This is required during boot before 104 * MMU has been enabled, or during a specified reset or power down sequence. 105 */ 106 static inline void v7_enable_smp(uint32_t address) 107 { 108 uint32_t temp, val; 109 110 /* Read auxiliary control register */ 111 asm volatile ("mrc p15, 0, %0, c1, c0, 1\n\t" : "=r"(val)); 112 113 /* Enable SMP */ 114 val |= (1 << 6); 115 116 /* Dummy read to assure L2 access */ 117 temp = readl(address); 118 temp &= 0; 119 val |= temp; 120 121 /* Write auxiliary control register */ 122 asm volatile ("mcr p15, 0, %0, c1, c0, 1\n\t" : : "r"(val)); 123 124 CP15DSB; 125 CP15ISB; 126 } 127 128 void v7_en_l2_hazard_detect(void); 129 void v7_outer_cache_enable(void); 130 void v7_outer_cache_disable(void); 131 void v7_outer_cache_flush_all(void); 132 void v7_outer_cache_inval_all(void); 133 void v7_outer_cache_flush_range(u32 start, u32 end); 134 void v7_outer_cache_inval_range(u32 start, u32 end); 135 136 #ifdef CONFIG_ARMV7_NONSEC 137 138 int armv7_init_nonsec(void); 139 int armv7_apply_memory_carveout(u64 *start, u64 *size); 140 bool armv7_boot_nonsec(void); 141 142 /* defined in assembly file */ 143 unsigned int _nonsec_init(void); 144 void _do_nonsec_entry(void *target_pc, unsigned long r0, 145 unsigned long r1, unsigned long r2); 146 void _smp_pen(void); 147 148 extern char __secure_start[]; 149 extern char __secure_end[]; 150 extern char __secure_stack_start[]; 151 extern char __secure_stack_end[]; 152 153 #endif /* CONFIG_ARMV7_NONSEC */ 154 155 void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr, 156 u32 cpu_rev_comb, u32 cpu_variant, 157 u32 cpu_rev); 158 void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb, 159 u32 cpu_variant, u32 cpu_rev); 160 #endif /* ! __ASSEMBLY__ */ 161 162 #endif 163