| /* |
| * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <common/bl_common.h> |
| #include <context.h> |
| |
| /* ----------------------------------------------------------------------------- |
| * Very simple stackless exception handlers used by the spm shim layer. |
| * ----------------------------------------------------------------------------- |
| */ |
| .globl spm_shim_exceptions_ptr |
| |
| vector_base spm_shim_exceptions_ptr, .spm_shim_exceptions |
| |
| /* ----------------------------------------------------- |
| * Current EL with SP0 : 0x0 - 0x200 |
| * ----------------------------------------------------- |
| */ |
| vector_entry SynchronousExceptionSP0, .spm_shim_exceptions |
| b . |
| end_vector_entry SynchronousExceptionSP0 |
| |
| vector_entry IrqSP0, .spm_shim_exceptions |
| b . |
| end_vector_entry IrqSP0 |
| |
| vector_entry FiqSP0, .spm_shim_exceptions |
| b . |
| end_vector_entry FiqSP0 |
| |
| vector_entry SErrorSP0, .spm_shim_exceptions |
| b . |
| end_vector_entry SErrorSP0 |
| |
| /* ----------------------------------------------------- |
| * Current EL with SPx: 0x200 - 0x400 |
| * ----------------------------------------------------- |
| */ |
| vector_entry SynchronousExceptionSPx, .spm_shim_exceptions |
| b . |
| end_vector_entry SynchronousExceptionSPx |
| |
| vector_entry IrqSPx, .spm_shim_exceptions |
| b . |
| end_vector_entry IrqSPx |
| |
| vector_entry FiqSPx, .spm_shim_exceptions |
| b . |
| end_vector_entry FiqSPx |
| |
| vector_entry SErrorSPx, .spm_shim_exceptions |
| b . |
| end_vector_entry SErrorSPx |
| |
| /* ----------------------------------------------------- |
| * Lower EL using AArch64 : 0x400 - 0x600. No exceptions |
| * are handled since secure_partition does not implement |
| * a lower EL |
| * ----------------------------------------------------- |
| */ |
| vector_entry SynchronousExceptionA64, .spm_shim_exceptions |
| msr tpidr_el1, x30 |
| mrs x30, esr_el1 |
| ubfx x30, x30, #ESR_EC_SHIFT, #ESR_EC_LENGTH |
| |
| cmp x30, #EC_AARCH64_SVC |
| b.eq do_smc |
| |
| cmp x30, #EC_AARCH32_SVC |
| b.eq do_smc |
| |
| cmp x30, #EC_AARCH64_SYS |
| b.eq handle_sys_trap |
| |
| /* Fail in all the other cases */ |
| b panic |
| |
| /* --------------------------------------------- |
| * Tell SPM that we are done initialising |
| * --------------------------------------------- |
| */ |
| do_smc: |
| mrs x30, tpidr_el1 |
| smc #0 |
| exception_return |
| |
| /* AArch64 system instructions trap are handled as a panic for now */ |
| handle_sys_trap: |
| panic: |
| b panic |
| end_vector_entry SynchronousExceptionA64 |
| |
| vector_entry IrqA64, .spm_shim_exceptions |
| b . |
| end_vector_entry IrqA64 |
| |
| vector_entry FiqA64, .spm_shim_exceptions |
| b . |
| end_vector_entry FiqA64 |
| |
| vector_entry SErrorA64, .spm_shim_exceptions |
| b . |
| end_vector_entry SErrorA64 |
| |
| /* ----------------------------------------------------- |
| * Lower EL using AArch32 : 0x600 - 0x800 |
| * ----------------------------------------------------- |
| */ |
| vector_entry SynchronousExceptionA32, .spm_shim_exceptions |
| b . |
| end_vector_entry SynchronousExceptionA32 |
| |
| vector_entry IrqA32, .spm_shim_exceptions |
| b . |
| end_vector_entry IrqA32 |
| |
| vector_entry FiqA32, .spm_shim_exceptions |
| b . |
| end_vector_entry FiqA32 |
| |
| vector_entry SErrorA32, .spm_shim_exceptions |
| b . |
| end_vector_entry SErrorA32 |
