1 /* 2 * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef __CPU_DATA_H__ 32 #define __CPU_DATA_H__ 33 34 /* Offsets for the cpu_data structure */ 35 #define CPU_DATA_CRASH_BUF_OFFSET 0x18 36 #if CRASH_REPORTING 37 #define CPU_DATA_LOG2SIZE 7 38 #else 39 #define CPU_DATA_LOG2SIZE 6 40 #endif 41 /* need enough space in crash buffer to save 8 registers */ 42 #define CPU_DATA_CRASH_BUF_SIZE 64 43 #define CPU_DATA_CPU_OPS_PTR 0x10 44 45 #ifndef __ASSEMBLY__ 46 47 #include <arch_helpers.h> 48 #include <cassert.h> 49 #include <platform_def.h> 50 #include <psci.h> 51 #include <stdint.h> 52 53 /* Offsets for the cpu_data structure */ 54 #define CPU_DATA_PSCI_LOCK_OFFSET __builtin_offsetof\ 55 (cpu_data_t, psci_svc_cpu_data.pcpu_bakery_info) 56 57 #if PLAT_PCPU_DATA_SIZE 58 #define CPU_DATA_PLAT_PCPU_OFFSET __builtin_offsetof\ 59 (cpu_data_t, platform_cpu_data) 60 #endif 61 62 /******************************************************************************* 63 * Function & variable prototypes 64 ******************************************************************************/ 65 66 /******************************************************************************* 67 * Cache of frequently used per-cpu data: 68 * Pointers to non-secure and secure security state contexts 69 * Address of the crash stack 70 * It is aligned to the cache line boundary to allow efficient concurrent 71 * manipulation of these pointers on different cpus 72 * 73 * TODO: Add other commonly used variables to this (tf_issues#90) 74 * 75 * The data structure and the _cpu_data accessors should not be used directly 76 * by components that have per-cpu members. The member access macros should be 77 * used for this. 78 ******************************************************************************/ 79 typedef struct cpu_data { 80 void *cpu_context[2]; 81 uint64_t cpu_ops_ptr; 82 #if CRASH_REPORTING 83 uint64_t crash_buf[CPU_DATA_CRASH_BUF_SIZE >> 3]; 84 #endif 85 struct psci_cpu_data psci_svc_cpu_data; 86 #if PLAT_PCPU_DATA_SIZE 87 uint8_t platform_cpu_data[PLAT_PCPU_DATA_SIZE]; 88 #endif 89 } __aligned(CACHE_WRITEBACK_GRANULE) cpu_data_t; 90 91 #if CRASH_REPORTING 92 /* verify assembler offsets match data structures */ 93 CASSERT(CPU_DATA_CRASH_BUF_OFFSET == __builtin_offsetof 94 (cpu_data_t, crash_buf), 95 assert_cpu_data_crash_stack_offset_mismatch); 96 #endif 97 98 CASSERT((1 << CPU_DATA_LOG2SIZE) == sizeof(cpu_data_t), 99 assert_cpu_data_log2size_mismatch); 100 101 CASSERT(CPU_DATA_CPU_OPS_PTR == __builtin_offsetof 102 (cpu_data_t, cpu_ops_ptr), 103 assert_cpu_data_cpu_ops_ptr_offset_mismatch); 104 105 struct cpu_data *_cpu_data_by_index(uint32_t cpu_index); 106 struct cpu_data *_cpu_data_by_mpidr(uint64_t mpidr); 107 108 /* Return the cpu_data structure for the current CPU. */ 109 static inline struct cpu_data *_cpu_data(void) 110 { 111 return (cpu_data_t *)read_tpidr_el3(); 112 } 113 114 115 /************************************************************************** 116 * APIs for initialising and accessing per-cpu data 117 *************************************************************************/ 118 119 void init_cpu_data_ptr(void); 120 121 #define get_cpu_data(_m) _cpu_data()->_m 122 #define set_cpu_data(_m, _v) _cpu_data()->_m = _v 123 #define get_cpu_data_by_index(_ix, _m) _cpu_data_by_index(_ix)->_m 124 #define set_cpu_data_by_index(_ix, _m, _v) _cpu_data_by_index(_ix)->_m = _v 125 #define get_cpu_data_by_mpidr(_id, _m) _cpu_data_by_mpidr(_id)->_m 126 #define set_cpu_data_by_mpidr(_id, _m, _v) _cpu_data_by_mpidr(_id)->_m = _v 127 128 #define flush_cpu_data(_m) flush_dcache_range((uint64_t) \ 129 &(_cpu_data()->_m), \ 130 sizeof(_cpu_data()->_m)) 131 #define flush_cpu_data_by_index(_ix, _m) \ 132 flush_dcache_range((uint64_t) \ 133 &(_cpu_data_by_index(_ix)->_m), \ 134 sizeof(_cpu_data_by_index(_ix)->_m)) 135 136 137 #endif /* __ASSEMBLY__ */ 138 #endif /* __CPU_DATA_H__ */ 139
