| /* |
| * Copyright (c) 2022-2023, Arm Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <asm_macros.S> |
| |
| .globl realm_vector |
| |
| /* |
| * Exception vector code for unhandled exceptions. |
| * Print a crash dump on the UART and loops forever. |
| */ |
| .macro unhandled_exception name |
| vector_entry \name |
| b crash_dump |
| end_vector_entry \name |
| .endm |
| |
| vector_base realm_vector |
| |
| /* |
| * Current EL with SP0 : 0x0 - 0x200. |
| */ |
| unhandled_exception sync_sp0 |
| unhandled_exception irq_sp0 |
| unhandled_exception fiq_sp0 |
| unhandled_exception serr_sp0 |
| |
| /* |
| * Current EL with SPx : 0x200 - 0x400. |
| */ |
| vector_entry sync_spx |
| b sync_exception_vector_entry |
| end_vector_entry sync_spx |
| |
| vector_entry irq_spx |
| b interrupt_vector_entry |
| end_vector_entry irq_spx |
| |
| vector_entry fiq_spx |
| b interrupt_vector_entry |
| end_vector_entry fiq_spx |
| |
| unhandled_exception serr_spx |
| |
| /* |
| * Lower EL using AArch64 : 0x400 - 0x600. |
| */ |
| unhandled_exception sync_a64 |
| unhandled_exception irq_a64 |
| unhandled_exception fiq_a64 |
| unhandled_exception serr_a64 |
| |
| /* |
| * Lower EL using AArch32 : 0x600 - 0x800. |
| */ |
| unhandled_exception sync_a32 |
| unhandled_exception irq_a32 |
| unhandled_exception fiq_a32 |
| unhandled_exception serr_a32 |
| |
| .macro save_gp_regs |
| stp x0, x1, [sp, #0x0] |
| stp x2, x3, [sp, #0x10] |
| stp x4, x5, [sp, #0x20] |
| stp x6, x7, [sp, #0x30] |
| stp x8, x9, [sp, #0x40] |
| stp x10, x11, [sp, #0x50] |
| stp x12, x13, [sp, #0x60] |
| stp x14, x15, [sp, #0x70] |
| stp x16, x17, [sp, #0x80] |
| stp x18, x19, [sp, #0x90] |
| stp x20, x21, [sp, #0xa0] |
| stp x22, x23, [sp, #0xb0] |
| stp x24, x25, [sp, #0xc0] |
| stp x26, x27, [sp, #0xd0] |
| stp x28, x29, [sp, #0xe0] |
| /* We push xzr simply to keep the stack 16-byte aligned. */ |
| stp x30, xzr, [sp, #0xf0] |
| .endm |
| |
| .macro restore_gp_regs |
| ldp x30, xzr, [sp, #0xf0] |
| ldp x28, x29, [sp, #0xe0] |
| ldp x26, x27, [sp, #0xd0] |
| ldp x24, x25, [sp, #0xc0] |
| ldp x22, x23, [sp, #0xb0] |
| ldp x20, x21, [sp, #0xa0] |
| ldp x18, x19, [sp, #0x90] |
| ldp x16, x17, [sp, #0x80] |
| ldp x14, x15, [sp, #0x70] |
| ldp x12, x13, [sp, #0x60] |
| ldp x10, x11, [sp, #0x50] |
| ldp x8, x9, [sp, #0x40] |
| ldp x6, x7, [sp, #0x30] |
| ldp x4, x5, [sp, #0x20] |
| ldp x2, x3, [sp, #0x10] |
| ldp x0, x1, [sp, #0x0] |
| .endm |
| |
| func sync_exception_vector_entry |
| sub sp, sp, #0x100 |
| save_gp_regs |
| mov x19, sp |
| bl tftf_sync_exception_handler |
| cbnz x0, 0f |
| mov x0, x19 |
| /* Save original stack pointer value on the stack */ |
| add x1, x0, #0x100 |
| str x1, [x0, #0xf8] |
| b realm_print_exception |
| 0: restore_gp_regs |
| add sp, sp, #0x100 |
| eret |
| endfunc sync_exception_vector_entry |
| |
| func interrupt_vector_entry |
| sub sp, sp, #0x100 |
| save_gp_regs |
| bl realm_interrupt_handler |
| restore_gp_regs |
| add sp, sp, #0x100 |
| eret |
| endfunc interrupt_vector_entry |
| |
| func crash_dump |
| /* Save general-purpose registers on the stack. */ |
| sub sp, sp, #0x100 |
| save_gp_regs |
| |
| /* Save original stack pointer value on the stack. */ |
| add x1, sp, #0x100 |
| str x1, [sp, #0xf8] |
| |
| /* Print the saved CPU context on the UART. */ |
| mov x0, sp |
| b realm_print_exception |
| endfunc crash_dump |