Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 | /* * Copyright (c) 2014 Wind River Systems, Inc. * * SPDX-License-Identifier: Apache-2.0 */ /** * @file * @brief ARC specific kernel interface header * * This header contains the ARC specific kernel interface. It is * included by the kernel interface architecture-abstraction header * include/arch/cpu.h) */ #ifndef ZEPHYR_INCLUDE_ARCH_ARC_ARCH_H_ #define ZEPHYR_INCLUDE_ARCH_ARC_ARCH_H_ #include <devicetree.h> #include <sw_isr_table.h> #include <arch/common/ffs.h> #include <arch/arc/thread.h> #include <arch/common/sys_bitops.h> #include "sys-io-common.h" #include <arch/arc/v2/exc.h> #include <arch/arc/v2/irq.h> #include <arch/arc/v2/misc.h> #include <arch/arc/v2/aux_regs.h> #include <arch/arc/v2/arcv2_irq_unit.h> #include <arch/arc/v2/asm_inline.h> #include <arch/arc/arc_addr_types.h> #include <arch/arc/v2/error.h> #ifdef CONFIG_ARC_CONNECT #include <arch/arc/v2/arc_connect.h> #endif #ifdef CONFIG_ISA_ARCV2 #include "v2/sys_io.h" #ifdef CONFIG_ARC_HAS_SECURE #include <arch/arc/v2/secureshield/arc_secure.h> #endif #endif #if defined(CONFIG_ARC_FIRQ) && defined(CONFIG_ISA_ARCV3) #error "Unsupported configuration: ARC_FIRQ and ISA_ARCV3" #endif /* * We don't allow the configuration with FIRQ enabled and only one interrupt priority level * (so all interrupts are FIRQ). Such configuration isn't supported in software and it is not * beneficial from the performance point of view. */ #if defined(CONFIG_ARC_FIRQ) && CONFIG_NUM_IRQ_PRIO_LEVELS < 2 #error "Unsupported configuration: ARC_FIRQ and (NUM_IRQ_PRIO_LEVELS < 2)" #endif #if CONFIG_RGF_NUM_BANKS > 1 && !defined(CONFIG_ARC_FIRQ) #error "Unsupported configuration: (RGF_NUM_BANKS > 1) and !ARC_FIRQ" #endif /* * It's required to have more than one interrupt priority level to use second register bank * - otherwise all interrupts will use same register bank. Such configuration isn't supported in * software and it is not beneficial from the performance point of view. */ #if CONFIG_RGF_NUM_BANKS > 1 && CONFIG_NUM_IRQ_PRIO_LEVELS < 2 #error "Unsupported configuration: (RGF_NUM_BANKS > 1) and (NUM_IRQ_PRIO_LEVELS < 2)" #endif #if defined(CONFIG_ARC_FIRQ_STACK) && !defined(CONFIG_ARC_FIRQ) #error "Unsupported configuration: ARC_FIRQ_STACK and !ARC_FIRQ" #endif #if defined(CONFIG_ARC_FIRQ_STACK) && CONFIG_RGF_NUM_BANKS < 2 #error "Unsupported configuration: ARC_FIRQ_STACK and (RGF_NUM_BANKS < 2)" #endif #ifndef _ASMLANGUAGE #ifdef __cplusplus extern "C" { #endif #ifdef CONFIG_64BIT #define ARCH_STACK_PTR_ALIGN 8 #else #define ARCH_STACK_PTR_ALIGN 4 #endif /* CONFIG_64BIT */ /* Indicate, for a minimally sized MPU region, how large it must be and what * its base address must be aligned to. * * For regions that are NOT the minimum size, this define has no semantics * on ARC MPUv2 as its regions must be power of two size and aligned to their * own size. On ARC MPUv4, region sizes are arbitrary and this just indicates * the required size granularity. */ #ifdef CONFIG_ARC_CORE_MPU #if CONFIG_ARC_MPU_VER == 2 #define Z_ARC_MPU_ALIGN 2048 #elif (CONFIG_ARC_MPU_VER == 3) || (CONFIG_ARC_MPU_VER == 4) || (CONFIG_ARC_MPU_VER == 6) #define Z_ARC_MPU_ALIGN 32 #else #error "Unsupported MPU version" #endif #endif #ifdef CONFIG_MPU_STACK_GUARD #define Z_ARC_STACK_GUARD_SIZE Z_ARC_MPU_ALIGN #else #define Z_ARC_STACK_GUARD_SIZE 0 #endif /* Kernel-only stacks have the following layout if a stack guard is enabled: * * +------------+ <- thread.stack_obj * | Guard | } Z_ARC_STACK_GUARD_SIZE * +------------+ <- thread.stack_info.start * | Kernel | * | stack | * | | * +............| * | TLS | } thread.stack_info.delta * +------------+ <- thread.stack_info.start + thread.stack_info.size */ #ifdef CONFIG_MPU_STACK_GUARD #define ARCH_KERNEL_STACK_RESERVED Z_ARC_STACK_GUARD_SIZE #define ARCH_KERNEL_STACK_OBJ_ALIGN Z_ARC_MPU_ALIGN #endif #ifdef CONFIG_USERSPACE /* Any thread running In user mode will have full access to the region denoted * by thread.stack_info. * * Thread-local storage is at the very highest memory locations of this area. * Memory for TLS and any initial random stack pointer offset is captured * in thread.stack_info.delta. */ #ifdef CONFIG_MPU_STACK_GUARD /* MPU guards are only supported with V3 MPU and later. In this configuration * the stack object will contain the MPU guard, the privilege stack, and then * the stack buffer in that order: * * +------------+ <- thread.stack_obj * | Guard | } Z_ARC_STACK_GUARD_SIZE * +------------+ <- thread.arch.priv_stack_start * | Priv Stack | } CONFIG_PRIVILEGED_STACK_SIZE * +------------+ <- thread.stack_info.start * | Thread | * | stack | * | | * +............| * | TLS | } thread.stack_info.delta * +------------+ <- thread.stack_info.start + thread.stack_info.size */ #define ARCH_THREAD_STACK_RESERVED (Z_ARC_STACK_GUARD_SIZE + \ CONFIG_PRIVILEGED_STACK_SIZE) #define ARCH_THREAD_STACK_OBJ_ALIGN(size) Z_ARC_MPU_ALIGN /* We need to be able to exactly cover the stack buffer with an MPU region, * so round its size up to the required granularity of the MPU */ #define ARCH_THREAD_STACK_SIZE_ADJUST(size) \ (ROUND_UP((size), Z_ARC_MPU_ALIGN)) BUILD_ASSERT(CONFIG_PRIVILEGED_STACK_SIZE % Z_ARC_MPU_ALIGN == 0, "improper privilege stack size"); #else /* !CONFIG_MPU_STACK_GUARD */ /* Userspace enabled, but supervisor stack guards are not in use */ #ifdef CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT /* Use defaults for everything. The privilege elevation stack is located * in another area of memory generated at build time by gen_kobject_list.py * * +------------+ <- thread.arch.priv_stack_start * | Priv Stack | } Z_KERNEL_STACK_LEN(CONFIG_PRIVILEGED_STACK_SIZE) * +------------+ * * +------------+ <- thread.stack_obj = thread.stack_info.start * | Thread | * | stack | * | | * +............| * | TLS | } thread.stack_info.delta * +------------+ <- thread.stack_info.start + thread.stack_info.size */ #define ARCH_THREAD_STACK_SIZE_ADJUST(size) \ Z_POW2_CEIL(ROUND_UP((size), Z_ARC_MPU_ALIGN)) #define ARCH_THREAD_STACK_OBJ_ALIGN(size) \ ARCH_THREAD_STACK_SIZE_ADJUST(size) #define ARCH_THREAD_STACK_RESERVED 0 #else /* !CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT */ /* Reserved area of the thread object just contains the privilege stack: * * +------------+ <- thread.stack_obj = thread.arch.priv_stack_start * | Priv Stack | } CONFIG_PRIVILEGED_STACK_SIZE * +------------+ <- thread.stack_info.start * | Thread | * | stack | * | | * +............| * | TLS | } thread.stack_info.delta * +------------+ <- thread.stack_info.start + thread.stack_info.size */ #define ARCH_THREAD_STACK_RESERVED CONFIG_PRIVILEGED_STACK_SIZE #define ARCH_THREAD_STACK_SIZE_ADJUST(size) \ (ROUND_UP((size), Z_ARC_MPU_ALIGN)) #define ARCH_THREAD_STACK_OBJ_ALIGN(size) Z_ARC_MPU_ALIGN BUILD_ASSERT(CONFIG_PRIVILEGED_STACK_SIZE % Z_ARC_MPU_ALIGN == 0, "improper privilege stack size"); #endif /* CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT */ #endif /* CONFIG_MPU_STACK_GUARD */ #else /* !CONFIG_USERSPACE */ #ifdef CONFIG_MPU_STACK_GUARD /* Only supported on ARC MPU V3 and higher. Reserve some memory for the stack * guard. This is just a minimally-sized region at the beginning of the stack * object, which is programmed to produce an exception if written to. * * +------------+ <- thread.stack_obj * | Guard | } Z_ARC_STACK_GUARD_SIZE * +------------+ <- thread.stack_info.start * | Thread | * | stack | * | | * +............| * | TLS | } thread.stack_info.delta * +------------+ <- thread.stack_info.start + thread.stack_info.size */ #define ARCH_THREAD_STACK_RESERVED Z_ARC_STACK_GUARD_SIZE #define ARCH_THREAD_STACK_OBJ_ALIGN(size) Z_ARC_MPU_ALIGN /* Default for ARCH_THREAD_STACK_SIZE_ADJUST */ #else /* !CONFIG_MPU_STACK_GUARD */ /* No stack guard, no userspace, Use defaults for everything. */ #endif /* CONFIG_MPU_STACK_GUARD */ #endif /* CONFIG_USERSPACE */ #ifdef CONFIG_ARC_MPU /* Legacy case: retain containing extern "C" with C++ */ #include <arch/arc/v2/mpu/arc_mpu.h> #define K_MEM_PARTITION_P_NA_U_NA AUX_MPU_ATTR_N #define K_MEM_PARTITION_P_RW_U_RW (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_UR | \ AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR) #define K_MEM_PARTITION_P_RW_U_RO (AUX_MPU_ATTR_UR | \ AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR) #define K_MEM_PARTITION_P_RW_U_NA (AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR) #define K_MEM_PARTITION_P_RO_U_RO (AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR) #define K_MEM_PARTITION_P_RO_U_NA (AUX_MPU_ATTR_KR) /* Execution-allowed attributes */ #define K_MEM_PARTITION_P_RWX_U_RWX (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_UR | \ AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR | \ AUX_MPU_ATTR_KE | AUX_MPU_ATTR_UE) #define K_MEM_PARTITION_P_RWX_U_RX (AUX_MPU_ATTR_UR | \ AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR | \ AUX_MPU_ATTR_KE | AUX_MPU_ATTR_UE) #define K_MEM_PARTITION_P_RX_U_RX (AUX_MPU_ATTR_UR | \ AUX_MPU_ATTR_KR | \ AUX_MPU_ATTR_KE | AUX_MPU_ATTR_UE) #define K_MEM_PARTITION_IS_WRITABLE(attr) \ ({ \ int __is_writable__; \ switch (attr & (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW)) { \ case (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW): \ case AUX_MPU_ATTR_UW: \ case AUX_MPU_ATTR_KW: \ __is_writable__ = 1; \ break; \ default: \ __is_writable__ = 0; \ break; \ } \ __is_writable__; \ }) #define K_MEM_PARTITION_IS_EXECUTABLE(attr) \ ((attr) & (AUX_MPU_ATTR_KE | AUX_MPU_ATTR_UE)) #if CONFIG_ARC_MPU_VER == 2 #define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \ BUILD_ASSERT(!(((size) & ((size) - 1))) && (size) >= Z_ARC_MPU_ALIGN \ && !((uint32_t)(start) & ((size) - 1)), \ "the size of the partition must be power of 2" \ " and greater than or equal to the mpu adddress alignment." \ "start address of the partition must align with size.") #elif CONFIG_ARC_MPU_VER == 4 #define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \ BUILD_ASSERT((size) % Z_ARC_MPU_ALIGN == 0 && \ (size) >= Z_ARC_MPU_ALIGN && \ (uint32_t)(start) % Z_ARC_MPU_ALIGN == 0, \ "the size of the partition must align with 32" \ " and greater than or equal to 32." \ "start address of the partition must align with 32.") #endif #endif /* CONFIG_ARC_MPU*/ /* Typedef for the k_mem_partition attribute*/ typedef uint32_t k_mem_partition_attr_t; static ALWAYS_INLINE void arch_nop(void) { __builtin_arc_nop(); } #endif /* _ASMLANGUAGE */ #ifdef __cplusplus } #endif #endif /* ZEPHYR_INCLUDE_ARCH_ARC_ARCH_H_ */ |