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/*
* 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
/* ----------------------------------------------------
* Common TSP interrupt handling routine
* ----------------------------------------------------
*/
.macro handle_tsp_interrupt label
/* Enable the SError interrupt */
msr daifclr, #DAIF_ABT_BIT
save_caller_regs_and_lr
bl tsp_common_int_handler
cbz x0, interrupt_exit_\label
/*
* This interrupt was not targetted to S-EL1 so send it to
* the monitor and wait for execution to resume.
*/
smc #0
interrupt_exit_\label:
restore_caller_regs_and_lr
eret
.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:
handle_tsp_interrupt irq_sp_elx
check_vector_size irq_sp_elx
.align 7
fiq_sp_elx:
handle_tsp_interrupt fiq_sp_elx
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