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