69761cd165
BUG=chrome-os-partner:31515 BRANCH=None TEST=test_exception generates a page fault which is handled by the exception handler and execution continues after eret from the exception Change-Id: Ie550492d2ed21b2c3009b5627f1e1a37429e6af0 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: e29fe77745d10e840c02498e54a0c53835530e5e Original-Change-Id: I29b7dabaece9b11a04ee3628d83513d30eb07b1d Original-Signed-off-by: Furquan Shaikh <furquan@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/213661 Original-Tested-by: Furquan Shaikh <furquan@chromium.org> Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org> Reviewed-on: http://review.coreboot.org/9000 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*
|
|
* 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 <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 exception_state *state)
|
|
{
|
|
int i;
|
|
uint64_t far_el3;
|
|
|
|
far_el3 = raw_read_far_el3();
|
|
|
|
printk(BIOS_DEBUG, "ELR = 0x%016llx\n", state->elr);
|
|
printk(BIOS_DEBUG, "ESR = 0x%08llx\n", state->esr);
|
|
printk(BIOS_DEBUG, "FAR_EL3 = 0x%016llx\n", far_el3);
|
|
for (i = 0; i < 31; i++)
|
|
printk(BIOS_DEBUG, "X%02d = 0x%016llx\n", i, state->regs[i]);
|
|
}
|
|
|
|
void exception_dispatch(struct exception_state *state, int idx)
|
|
{
|
|
if (idx >= EXC_COUNT) {
|
|
printk(BIOS_DEBUG, "Bad exception index %d.\n", 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(state);
|
|
|
|
if (test_exc) {
|
|
state->elr += 4;
|
|
test_exc = 0;
|
|
printk(BIOS_DEBUG, "new ELR = 0x%016llx\n", state->elr);
|
|
} else
|
|
die("exception");
|
|
}
|
|
|
|
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_init(void)
|
|
{
|
|
extern void *exception_table;
|
|
|
|
set_vbar(&exception_table);
|
|
|
|
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");
|
|
}
|