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Diffstat (limited to 'bl31/aarch64/crash_reporting.S')
| -rw-r--r-- | bl31/aarch64/crash_reporting.S | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/bl31/aarch64/crash_reporting.S b/bl31/aarch64/crash_reporting.S new file mode 100644 index 0000000..cb9110b --- /dev/null +++ b/bl31/aarch64/crash_reporting.S @@ -0,0 +1,291 @@ +/* + * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include <arch.h> +#include <asm_macros.S> +#include <context.h> +#include <plat_macros.S> + + .globl get_crash_stack + .globl dump_state_and_die + .globl dump_intr_state_and_die + + /* ------------------------------------------------------ + * The below section deals with dumping the system state + * when an unhandled exception is taken in EL3. + * The layout and the names of the registers which will + * be dumped during a unhandled exception is given below. + * ------------------------------------------------------ + */ +.section .rodata.dump_reg_name, "aS" +caller_saved_regs: .asciz "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",\ + "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16",\ + "x17", "x18", "" + +callee_saved_regs: .asciz "x19", "x20", "x21", "x22", "x23", "x24",\ + "x25", "x26", "x27", "x28", "x29", "x30", "" + +el3_sys_regs: .asciz "scr_el3", "sctlr_el3", "cptr_el3", "tcr_el3",\ + "daif", "mair_el3", "spsr_el3", "elr_el3", "ttbr0_el3", "esr_el3",\ + "sp_el3", "far_el3", "" + +non_el3_sys_0_regs: .asciz "spsr_el1", "elr_el1", "spsr_abt", "spsr_und",\ + "spsr_irq", "spsr_fiq", "sctlr_el1", "actlr_el1", "cpacr_el1",\ + "csselr_el1", "sp_el1", "esr_el1", "ttbr0_el1", "ttbr1_el1",\ + "mair_el1", "amair_el1", "tcr_el1", "tpidr_el1", "" + +non_el3_sys_1_regs: .asciz "tpidr_el0", "tpidrro_el0", "dacr32_el2",\ + "ifsr32_el2", "par_el1", "far_el1", "afsr0_el1", "afsr1_el1",\ + "contextidr_el1", "vbar_el1", "cntp_ctl_el0", "cntp_cval_el0",\ + "cntv_ctl_el0", "cntv_cval_el0", "cntkctl_el1", "fpexc32_el2",\ + "sp_el0", "" + + /* ----------------------------------------------------- + * Currently we are stack limited. Hence make sure that + * we dont try to dump more than 20 registers using the + * stack. + * ----------------------------------------------------- + */ + +#define REG_SIZE 0x8 + +/* The caller saved registers are X0 to X18 */ +#define CALLER_SAVED_REG_SIZE (20 * REG_SIZE) +/* The caller saved registers are X19 to X30 */ +#define CALLEE_SAVED_REG_SIZE (12 * REG_SIZE) +/* The EL3 sys regs*/ +#define EL3_SYS_REG_SIZE (12 * REG_SIZE) +/* The non EL3 sys regs set-0 */ +#define NON_EL3_SYS_0_REG_SIZE (18 * REG_SIZE) +/* The non EL3 sys regs set-1 */ +#define NON_EL3_SYS_1_REG_SIZE (18 * REG_SIZE) + + .macro print_caller_saved_regs + sub sp, sp, #CALLER_SAVED_REG_SIZE + stp x0, x1, [sp] + stp x2, x3, [sp, #(REG_SIZE * 2)] + stp x4, x5, [sp, #(REG_SIZE * 4)] + stp x6, x7, [sp, #(REG_SIZE * 6)] + stp x8, x9, [sp, #(REG_SIZE * 8)] + stp x10, x11, [sp, #(REG_SIZE * 10)] + stp x12, x13, [sp, #(REG_SIZE * 12)] + stp x14, x15, [sp, #(REG_SIZE * 14)] + stp x16, x17, [sp, #(REG_SIZE * 16)] + stp x18, xzr, [sp, #(REG_SIZE * 18)] + adr x0, caller_saved_regs + mov x1, sp + bl print_string_value + add sp, sp, #CALLER_SAVED_REG_SIZE + .endm + + .macro print_callee_saved_regs + sub sp, sp, CALLEE_SAVED_REG_SIZE + stp x19, x20, [sp] + stp x21, x22, [sp, #(REG_SIZE * 2)] + stp x23, x24, [sp, #(REG_SIZE * 4)] + stp x25, x26, [sp, #(REG_SIZE * 6)] + stp x27, x28, [sp, #(REG_SIZE * 8)] + stp x29, x30, [sp, #(REG_SIZE * 10)] + adr x0, callee_saved_regs + mov x1, sp + bl print_string_value + add sp, sp, #CALLEE_SAVED_REG_SIZE + .endm + + .macro print_el3_sys_regs + sub sp, sp, #EL3_SYS_REG_SIZE + mrs x9, scr_el3 + mrs x10, sctlr_el3 + mrs x11, cptr_el3 + mrs x12, tcr_el3 + mrs x13, daif + mrs x14, mair_el3 + mrs x15, spsr_el3 /*save the elr and spsr regs seperately*/ + mrs x16, elr_el3 + mrs x17, ttbr0_el3 + mrs x8, esr_el3 + mrs x7, far_el3 + + stp x9, x10, [sp] + stp x11, x12, [sp, #(REG_SIZE * 2)] + stp x13, x14, [sp, #(REG_SIZE * 4)] + stp x15, x16, [sp, #(REG_SIZE * 6)] + stp x17, x8, [sp, #(REG_SIZE * 8)] + stp x0, x7, [sp, #(REG_SIZE * 10)] /* sp_el3 is in x0 */ + + adr x0, el3_sys_regs + mov x1, sp + bl print_string_value + add sp, sp, #EL3_SYS_REG_SIZE + .endm + + .macro print_non_el3_sys_0_regs + sub sp, sp, #NON_EL3_SYS_0_REG_SIZE + mrs x9, spsr_el1 + mrs x10, elr_el1 + mrs x11, spsr_abt + mrs x12, spsr_und + mrs x13, spsr_irq + mrs x14, spsr_fiq + mrs x15, sctlr_el1 + mrs x16, actlr_el1 + mrs x17, cpacr_el1 + mrs x8, csselr_el1 + + stp x9, x10, [sp] + stp x11, x12, [sp, #(REG_SIZE * 2)] + stp x13, x14, [sp, #(REG_SIZE * 4)] + stp x15, x16, [sp, #(REG_SIZE * 6)] + stp x17, x8, [sp, #(REG_SIZE * 8)] + + mrs x10, sp_el1 + mrs x11, esr_el1 + mrs x12, ttbr0_el1 + mrs x13, ttbr1_el1 + mrs x14, mair_el1 + mrs x15, amair_el1 + mrs x16, tcr_el1 + mrs x17, tpidr_el1 + + stp x10, x11, [sp, #(REG_SIZE * 10)] + stp x12, x13, [sp, #(REG_SIZE * 12)] + stp x14, x15, [sp, #(REG_SIZE * 14)] + stp x16, x17, [sp, #(REG_SIZE * 16)] + + adr x0, non_el3_sys_0_regs + mov x1, sp + bl print_string_value + add sp, sp, #NON_EL3_SYS_0_REG_SIZE + .endm + + .macro print_non_el3_sys_1_regs + sub sp, sp, #NON_EL3_SYS_1_REG_SIZE + + mrs x9, tpidr_el0 + mrs x10, tpidrro_el0 + mrs x11, dacr32_el2 + mrs x12, ifsr32_el2 + mrs x13, par_el1 + mrs x14, far_el1 + mrs x15, afsr0_el1 + mrs x16, afsr1_el1 + mrs x17, contextidr_el1 + mrs x8, vbar_el1 + + stp x9, x10, [sp] + stp x11, x12, [sp, #(REG_SIZE * 2)] + stp x13, x14, [sp, #(REG_SIZE * 4)] + stp x15, x16, [sp, #(REG_SIZE * 6)] + stp x17, x8, [sp, #(REG_SIZE * 8)] + + mrs x10, cntp_ctl_el0 + mrs x11, cntp_cval_el0 + mrs x12, cntv_ctl_el0 + mrs x13, cntv_cval_el0 + mrs x14, cntkctl_el1 + mrs x15, fpexc32_el2 + mrs x8, sp_el0 + + stp x10, x11, [sp, #(REG_SIZE *10)] + stp x12, x13, [sp, #(REG_SIZE * 12)] + stp x14, x15, [sp, #(REG_SIZE * 14)] + stp x8, xzr, [sp, #(REG_SIZE * 16)] + + adr x0, non_el3_sys_1_regs + mov x1, sp + bl print_string_value + add sp, sp, #NON_EL3_SYS_1_REG_SIZE + .endm + + .macro init_crash_stack + msr cntfrq_el0, x0 /* we can corrupt this reg to free up x0 */ + mrs x0, tpidr_el3 + + /* Check if tpidr is initialized */ + cbz x0, infinite_loop + + ldr x0, [x0, #PTR_CACHE_CRASH_STACK_OFFSET] + /* store the x30 and sp to stack */ + str x30, [x0, #-(REG_SIZE)]! + mov x30, sp + str x30, [x0, #-(REG_SIZE)]! + mov sp, x0 + mrs x0, cntfrq_el0 + .endm + + /* --------------------------------------------------- + * The below function initializes the crash dump stack , + * and prints the system state. This function + * will not return. + * --------------------------------------------------- + */ +func dump_state_and_die + init_crash_stack + print_caller_saved_regs + b print_state + +func dump_intr_state_and_die + init_crash_stack + print_caller_saved_regs + plat_print_gic_regs /* fall through to print_state */ + +print_state: + /* copy the original x30 from stack */ + ldr x30, [sp, #REG_SIZE] + print_callee_saved_regs + /* copy the original SP_EL3 from stack to x0 and rewind stack */ + ldr x0, [sp], #(REG_SIZE * 2) + print_el3_sys_regs + print_non_el3_sys_0_regs + print_non_el3_sys_1_regs + b infinite_loop + +func infinite_loop + b infinite_loop + + +#define PCPU_CRASH_STACK_SIZE 0x140 + + /* ----------------------------------------------------- + * void get_crash_stack (uint64_t mpidr) : This + * function is used to allocate a small stack for + * reporting unhandled exceptions + * ----------------------------------------------------- + */ +func get_crash_stack + mov x10, x30 // lr + get_mp_stack pcpu_crash_stack, PCPU_CRASH_STACK_SIZE + ret x10 + + /* ----------------------------------------------------- + * Per-cpu crash stacks in normal memory. + * ----------------------------------------------------- + */ +declare_stack pcpu_crash_stack, tzfw_normal_stacks, \ + PCPU_CRASH_STACK_SIZE, PLATFORM_CORE_COUNT |