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#include <arch.h> 31#include <asm_macros.S> 32#include <context.h> 33#include <plat_macros.S> 34#include <platform_def.h> 35 36 .globl get_crash_stack 37 .globl dump_state_and_die 38 .globl dump_intr_state_and_die 39 40#if CRASH_REPORTING 41 /* ------------------------------------------------------ 42 * The below section deals with dumping the system state 43 * when an unhandled exception is taken in EL3. 44 * The layout and the names of the registers which will 45 * be dumped during a unhandled exception is given below. 46 * ------------------------------------------------------ 47 */ 48.section .rodata.dump_reg_name, "aS" 49caller_saved_regs: .asciz "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",\ 50 "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16",\ 51 "x17", "x18", "" 52 53callee_saved_regs: .asciz "x19", "x20", "x21", "x22", "x23", "x24",\ 54 "x25", "x26", "x27", "x28", "x29", "x30", "" 55 56el3_sys_regs: .asciz "scr_el3", "sctlr_el3", "cptr_el3", "tcr_el3",\ 57 "daif", "mair_el3", "spsr_el3", "elr_el3", "ttbr0_el3", "esr_el3",\ 58 "sp_el3", "far_el3", "" 59 60non_el3_sys_0_regs: .asciz "spsr_el1", "elr_el1", "spsr_abt", "spsr_und",\ 61 "spsr_irq", "spsr_fiq", "sctlr_el1", "actlr_el1", "cpacr_el1",\ 62 "csselr_el1", "sp_el1", "esr_el1", "ttbr0_el1", "ttbr1_el1",\ 63 "mair_el1", "amair_el1", "tcr_el1", "tpidr_el1", "" 64 65non_el3_sys_1_regs: .asciz "tpidr_el0", "tpidrro_el0", "dacr32_el2",\ 66 "ifsr32_el2", "par_el1", "far_el1", "afsr0_el1", "afsr1_el1",\ 67 "contextidr_el1", "vbar_el1", "cntp_ctl_el0", "cntp_cval_el0",\ 68 "cntv_ctl_el0", "cntv_cval_el0", "cntkctl_el1", "fpexc32_el2",\ 69 "sp_el0", "" 70 71 /* ----------------------------------------------------- 72 * Currently we are stack limited. Hence make sure that 73 * we dont try to dump more than 20 registers using the 74 * stack. 75 * ----------------------------------------------------- 76 */ 77 78#define REG_SIZE 0x8 79 80/* The caller saved registers are X0 to X18 */ 81#define CALLER_SAVED_REG_SIZE (20 * REG_SIZE) 82/* The caller saved registers are X19 to X30 */ 83#define CALLEE_SAVED_REG_SIZE (12 * REG_SIZE) 84/* The EL3 sys regs*/ 85#define EL3_SYS_REG_SIZE (12 * REG_SIZE) 86/* The non EL3 sys regs set-0 */ 87#define NON_EL3_SYS_0_REG_SIZE (18 * REG_SIZE) 88/* The non EL3 sys regs set-1 */ 89#define NON_EL3_SYS_1_REG_SIZE (18 * REG_SIZE) 90 91 .macro print_caller_saved_regs 92 sub sp, sp, #CALLER_SAVED_REG_SIZE 93 stp x0, x1, [sp] 94 stp x2, x3, [sp, #(REG_SIZE * 2)] 95 stp x4, x5, [sp, #(REG_SIZE * 4)] 96 stp x6, x7, [sp, #(REG_SIZE * 6)] 97 stp x8, x9, [sp, #(REG_SIZE * 8)] 98 stp x10, x11, [sp, #(REG_SIZE * 10)] 99 stp x12, x13, [sp, #(REG_SIZE * 12)] 100 stp x14, x15, [sp, #(REG_SIZE * 14)] 101 stp x16, x17, [sp, #(REG_SIZE * 16)] 102 stp x18, xzr, [sp, #(REG_SIZE * 18)] 103 adr x0, caller_saved_regs 104 mov x1, sp 105 bl print_string_value 106 add sp, sp, #CALLER_SAVED_REG_SIZE 107 .endm 108 109 .macro print_callee_saved_regs 110 sub sp, sp, CALLEE_SAVED_REG_SIZE 111 stp x19, x20, [sp] 112 stp x21, x22, [sp, #(REG_SIZE * 2)] 113 stp x23, x24, [sp, #(REG_SIZE * 4)] 114 stp x25, x26, [sp, #(REG_SIZE * 6)] 115 stp x27, x28, [sp, #(REG_SIZE * 8)] 116 stp x29, x30, [sp, #(REG_SIZE * 10)] 117 adr x0, callee_saved_regs 118 mov x1, sp 119 bl print_string_value 120 add sp, sp, #CALLEE_SAVED_REG_SIZE 121 .endm 122 123 .macro print_el3_sys_regs 124 sub sp, sp, #EL3_SYS_REG_SIZE 125 mrs x9, scr_el3 126 mrs x10, sctlr_el3 127 mrs x11, cptr_el3 128 mrs x12, tcr_el3 129 mrs x13, daif 130 mrs x14, mair_el3 131 mrs x15, spsr_el3 /*save the elr and spsr regs seperately*/ 132 mrs x16, elr_el3 133 mrs x17, ttbr0_el3 134 mrs x8, esr_el3 135 mrs x7, far_el3 136 137 stp x9, x10, [sp] 138 stp x11, x12, [sp, #(REG_SIZE * 2)] 139 stp x13, x14, [sp, #(REG_SIZE * 4)] 140 stp x15, x16, [sp, #(REG_SIZE * 6)] 141 stp x17, x8, [sp, #(REG_SIZE * 8)] 142 stp x0, x7, [sp, #(REG_SIZE * 10)] /* sp_el3 is in x0 */ 143 144 adr x0, el3_sys_regs 145 mov x1, sp 146 bl print_string_value 147 add sp, sp, #EL3_SYS_REG_SIZE 148 .endm 149 150 .macro print_non_el3_sys_0_regs 151 sub sp, sp, #NON_EL3_SYS_0_REG_SIZE 152 mrs x9, spsr_el1 153 mrs x10, elr_el1 154 mrs x11, spsr_abt 155 mrs x12, spsr_und 156 mrs x13, spsr_irq 157 mrs x14, spsr_fiq 158 mrs x15, sctlr_el1 159 mrs x16, actlr_el1 160 mrs x17, cpacr_el1 161 mrs x8, csselr_el1 162 163 stp x9, x10, [sp] 164 stp x11, x12, [sp, #(REG_SIZE * 2)] 165 stp x13, x14, [sp, #(REG_SIZE * 4)] 166 stp x15, x16, [sp, #(REG_SIZE * 6)] 167 stp x17, x8, [sp, #(REG_SIZE * 8)] 168 169 mrs x10, sp_el1 170 mrs x11, esr_el1 171 mrs x12, ttbr0_el1 172 mrs x13, ttbr1_el1 173 mrs x14, mair_el1 174 mrs x15, amair_el1 175 mrs x16, tcr_el1 176 mrs x17, tpidr_el1 177 178 stp x10, x11, [sp, #(REG_SIZE * 10)] 179 stp x12, x13, [sp, #(REG_SIZE * 12)] 180 stp x14, x15, [sp, #(REG_SIZE * 14)] 181 stp x16, x17, [sp, #(REG_SIZE * 16)] 182 183 adr x0, non_el3_sys_0_regs 184 mov x1, sp 185 bl print_string_value 186 add sp, sp, #NON_EL3_SYS_0_REG_SIZE 187 .endm 188 189 .macro print_non_el3_sys_1_regs 190 sub sp, sp, #NON_EL3_SYS_1_REG_SIZE 191 192 mrs x9, tpidr_el0 193 mrs x10, tpidrro_el0 194 mrs x11, dacr32_el2 195 mrs x12, ifsr32_el2 196 mrs x13, par_el1 197 mrs x14, far_el1 198 mrs x15, afsr0_el1 199 mrs x16, afsr1_el1 200 mrs x17, contextidr_el1 201 mrs x8, vbar_el1 202 203 stp x9, x10, [sp] 204 stp x11, x12, [sp, #(REG_SIZE * 2)] 205 stp x13, x14, [sp, #(REG_SIZE * 4)] 206 stp x15, x16, [sp, #(REG_SIZE * 6)] 207 stp x17, x8, [sp, #(REG_SIZE * 8)] 208 209 mrs x10, cntp_ctl_el0 210 mrs x11, cntp_cval_el0 211 mrs x12, cntv_ctl_el0 212 mrs x13, cntv_cval_el0 213 mrs x14, cntkctl_el1 214 mrs x15, fpexc32_el2 215 mrs x8, sp_el0 216 217 stp x10, x11, [sp, #(REG_SIZE *10)] 218 stp x12, x13, [sp, #(REG_SIZE * 12)] 219 stp x14, x15, [sp, #(REG_SIZE * 14)] 220 stp x8, xzr, [sp, #(REG_SIZE * 16)] 221 222 adr x0, non_el3_sys_1_regs 223 mov x1, sp 224 bl print_string_value 225 add sp, sp, #NON_EL3_SYS_1_REG_SIZE 226 .endm 227 228 .macro init_crash_stack 229 msr cntfrq_el0, x0 /* we can corrupt this reg to free up x0 */ 230 mrs x0, tpidr_el3 231 232 /* Check if tpidr is initialized */ 233 cbz x0, infinite_loop 234 235 ldr x0, [x0, #PTR_CACHE_CRASH_STACK_OFFSET] 236 /* store the x30 and sp to stack */ 237 str x30, [x0, #-(REG_SIZE)]! 238 mov x30, sp 239 str x30, [x0, #-(REG_SIZE)]! 240 mov sp, x0 241 mrs x0, cntfrq_el0 242 .endm 243 244 /* --------------------------------------------------- 245 * The below function initializes the crash dump stack , 246 * and prints the system state. This function 247 * will not return. 248 * --------------------------------------------------- 249 */ 250func dump_state_and_die 251 init_crash_stack 252 print_caller_saved_regs 253 b print_state 254 255func dump_intr_state_and_die 256 init_crash_stack 257 print_caller_saved_regs 258 plat_print_gic_regs /* fall through to print_state */ 259 260print_state: 261 /* copy the original x30 from stack */ 262 ldr x30, [sp, #REG_SIZE] 263 print_callee_saved_regs 264 /* copy the original SP_EL3 from stack to x0 and rewind stack */ 265 ldr x0, [sp], #(REG_SIZE * 2) 266 print_el3_sys_regs 267 print_non_el3_sys_0_regs 268 print_non_el3_sys_1_regs 269 270#else /* CRASH_REPORING */ 271 272func dump_state_and_die 273dump_intr_state_and_die: 274 275#endif /* CRASH_REPORING */ 276 277infinite_loop: 278 b infinite_loop 279 280 281#define PCPU_CRASH_STACK_SIZE 0x140 282 283 /* ----------------------------------------------------- 284 * void get_crash_stack (uint64_t mpidr) : This 285 * function is used to allocate a small stack for 286 * reporting unhandled exceptions 287 * ----------------------------------------------------- 288 */ 289func get_crash_stack 290 mov x10, x30 // lr 291 get_mp_stack pcpu_crash_stack, PCPU_CRASH_STACK_SIZE 292 ret x10 293 294 /* ----------------------------------------------------- 295 * Per-cpu crash stacks in normal memory. 296 * ----------------------------------------------------- 297 */ 298declare_stack pcpu_crash_stack, tzfw_normal_stacks, \ 299 PCPU_CRASH_STACK_SIZE, PLATFORM_CORE_COUNT 300