| /* |
| * Copyright (c) 2013-2014, 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 <bl_common.h> |
| #include <arch.h> |
| #include <tsp.h> |
| #include <asm_macros.S> |
| |
| |
| /* ---------------------------------------------------- |
| * The caller-saved registers x0-x18 and LR are saved |
| * here. |
| * ---------------------------------------------------- |
| */ |
| |
| #define SCRATCH_REG_SIZE #(20 * 8) |
| |
| .macro save_caller_regs_and_lr |
| sub sp, sp, SCRATCH_REG_SIZE |
| stp x0, x1, [sp] |
| 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, x30, [sp, #0x90] |
| .endm |
| |
| .macro restore_caller_regs_and_lr |
| ldp x0, x1, [sp] |
| ldp x2, x3, [sp, #0x10] |
| ldp x4, x5, [sp, #0x20] |
| ldp x6, x7, [sp, #0x30] |
| ldp x8, x9, [sp, #0x40] |
| ldp x10, x11, [sp, #0x50] |
| ldp x12, x13, [sp, #0x60] |
| ldp x14, x15, [sp, #0x70] |
| ldp x16, x17, [sp, #0x80] |
| ldp x18, x30, [sp, #0x90] |
| add sp, sp, SCRATCH_REG_SIZE |
| .endm |
| |
| .globl tsp_exceptions |
| |
| /* ----------------------------------------------------- |
| * TSP exception handlers. |
| * ----------------------------------------------------- |
| */ |
| .section .vectors, "ax"; .align 11 |
| |
| .align 7 |
| tsp_exceptions: |
| /* ----------------------------------------------------- |
| * Current EL with _sp_el0 : 0x0 - 0x180. No exceptions |
| * are expected and treated as irrecoverable errors. |
| * ----------------------------------------------------- |
| */ |
| sync_exception_sp_el0: |
| wfi |
| b sync_exception_sp_el0 |
| check_vector_size sync_exception_sp_el0 |
| |
| .align 7 |
| |
| irq_sp_el0: |
| b irq_sp_el0 |
| check_vector_size irq_sp_el0 |
| |
| .align 7 |
| fiq_sp_el0: |
| b fiq_sp_el0 |
| check_vector_size fiq_sp_el0 |
| |
| .align 7 |
| serror_sp_el0: |
| b serror_sp_el0 |
| check_vector_size serror_sp_el0 |
| |
| |
| /* ----------------------------------------------------- |
| * Current EL with SPx: 0x200 - 0x380. Only IRQs/FIQs |
| * are expected and handled |
| * ----------------------------------------------------- |
| */ |
| .align 7 |
| sync_exception_sp_elx: |
| wfi |
| b sync_exception_sp_elx |
| check_vector_size sync_exception_sp_elx |
| |
| .align 7 |
| irq_sp_elx: |
| b irq_sp_elx |
| check_vector_size irq_sp_elx |
| |
| .align 7 |
| fiq_sp_elx: |
| save_caller_regs_and_lr |
| bl tsp_fiq_handler |
| cbz x0, fiq_sp_elx_done |
| |
| /* |
| * This FIQ was not targetted to S-EL1 so send it to |
| * the monitor and wait for execution to resume. |
| */ |
| smc #0 |
| fiq_sp_elx_done: |
| restore_caller_regs_and_lr |
| eret |
| check_vector_size fiq_sp_elx |
| |
| .align 7 |
| serror_sp_elx: |
| b serror_sp_elx |
| check_vector_size serror_sp_elx |
| |
| |
| /* ----------------------------------------------------- |
| * Lower EL using AArch64 : 0x400 - 0x580. No exceptions |
| * are handled since TSP does not implement a lower EL |
| * ----------------------------------------------------- |
| */ |
| .align 7 |
| sync_exception_aarch64: |
| wfi |
| b sync_exception_aarch64 |
| check_vector_size sync_exception_aarch64 |
| |
| .align 7 |
| irq_aarch64: |
| b irq_aarch64 |
| check_vector_size irq_aarch64 |
| |
| .align 7 |
| fiq_aarch64: |
| b fiq_aarch64 |
| check_vector_size fiq_aarch64 |
| |
| .align 7 |
| serror_aarch64: |
| b serror_aarch64 |
| check_vector_size serror_aarch64 |
| |
| |
| /* ----------------------------------------------------- |
| * Lower EL using AArch32 : 0x600 - 0x780. No exceptions |
| * handled since the TSP does not implement a lower EL. |
| * ----------------------------------------------------- |
| */ |
| .align 7 |
| sync_exception_aarch32: |
| wfi |
| b sync_exception_aarch32 |
| check_vector_size sync_exception_aarch32 |
| |
| .align 7 |
| irq_aarch32: |
| b irq_aarch32 |
| check_vector_size irq_aarch32 |
| |
| .align 7 |
| fiq_aarch32: |
| b fiq_aarch32 |
| check_vector_size fiq_aarch32 |
| |
| .align 7 |
| serror_aarch32: |
| b serror_aarch32 |
| check_vector_size serror_aarch32 |
| .align 7 |