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