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/*
* This file is part of the libpayload project.
*
* Copyright 2013 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <stdint.h>
#include <types.h>
#include <arch/cache.h>
#include <arch/exception.h>
#include <arch/transition.h>
#include <console/console.h>
#include <arch/lib_helpers.h>
static unsigned int test_exc;
struct exception_handler_info
{
const char *name;
};
enum {
EXC_SYNC_SP0 = 0,
EXC_IRQ_SP0,
EXC_FIQ_SP0,
EXC_SERROR_SP0,
EXC_SYNC_SP3,
EXC_IRQ_SP3,
EXC_FIQ_SP3,
EXC_SERROR_SP3,
EXC_SYNC_ELX_64,
EXC_IRQ_ELX_64,
EXC_FIQ_ELX_64,
EXC_SERROR_ELX_64,
EXC_SYNC_ELX_32,
EXC_IRQ_ELX_32,
EXC_FIQ_ELX_32,
EXC_SERROR_ELX_32,
EXC_COUNT
};
static struct exception_handler_info exceptions[EXC_COUNT] = {
[EXC_SYNC_SP0] = { "_sync_sp_el0" },
[EXC_IRQ_SP0] = { "_irq_sp_el0" },
[EXC_FIQ_SP0] = { "_fiq_sp_el0" },
[EXC_SERROR_SP0] = {"_serror_sp_el0"},
[EXC_SYNC_SP3] = { "_sync_sp_el3" },
[EXC_IRQ_SP3] = { "_irq_sp_el3" },
[EXC_FIQ_SP3] = { "_fiq_sp_el3" },
[EXC_SERROR_SP3] = {"_serror_sp_el3"},
[EXC_SYNC_ELX_64] = { "_sync_elx_64" },
[EXC_IRQ_ELX_64] = { "_irq_elx_64" },
[EXC_FIQ_ELX_64] = { "_fiq_elx_64" },
[EXC_SERROR_ELX_64] = {"_serror_elx_64"},
[EXC_SYNC_ELX_32] = { "_sync_elx_32" },
[EXC_IRQ_ELX_32] = { "_irq_elx_32" },
[EXC_FIQ_ELX_32] = { "_fiq_elx_32" },
[EXC_SERROR_ELX_32] = {"_serror_elx_32"},
};
static void print_regs(struct exc_state *exc_state)
{
int i;
struct elx_state *elx = &exc_state->elx;
struct regs *regs = &exc_state->regs;
uint64_t elx_esr = raw_read_esr_current();
uint64_t elx_far = raw_read_far_current();
printk(BIOS_DEBUG, "ELR = 0x%016llx\n", elx->elr);
printk(BIOS_DEBUG, "ESR = 0x%016llx\n", elx_esr);
printk(BIOS_DEBUG, "SPSR = 0x%08llx\n", elx->spsr);
printk(BIOS_DEBUG, "FAR = 0x%016llx\n", elx_far);
for (i = X0_INDEX; i < XMAX_INDEX; i++)
printk(BIOS_DEBUG, "X%02d = 0x%016llx\n", i, regs->x[i]);
}
void exc_dispatch(struct exc_state *exc_state, uint64_t idx)
{
if (idx >= EXC_COUNT) {
printk(BIOS_DEBUG, "Bad exception index %lx.\n",
(unsigned long)idx);
} else {
struct exception_handler_info *info = &exceptions[idx];
if (info->name)
printk(BIOS_DEBUG, "exception %s\n", info->name);
else
printk(BIOS_DEBUG, "exception _not_used.\n");
}
print_regs(exc_state);
if (test_exc) {
exc_state->elx.elr += 4;
raw_write_elr_current(exc_state->elx.elr);
test_exc = 0;
printk(BIOS_DEBUG, "new ELR = 0x%016llx\n", exc_state->elx.elr);
} else
die("exception");
exc_exit(&exc_state->regs);
}
static uint64_t test_exception(void)
{
uint64_t *a = (uint64_t *)0xfffffffff0000000ULL;
test_exc = 1;
printk(BIOS_DEBUG, "%llx\n", *a);
return 0;
}
void exception_hwinit(void)
{
exc_set_vbar();
}
void exception_init(void)
{
/* Load the exception table. */
exception_hwinit();
printk(BIOS_DEBUG, "ARM64: Exception handlers installed.\n");
printk(BIOS_DEBUG, "ARM64: Testing exception\n");
test_exception();
printk(BIOS_DEBUG, "ARM64: Done test exception\n");
}
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