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/*
* arch/arm64/mach-tegra/nvdumper_regdump.c
*
* Copyright (c) 2011-2014, NVIDIA CORPORATION. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/kernel.h>
#include <linux/kdebug.h>
#include <linux/notifier.h>
#include <linux/sched.h>
#include <linux/dma-mapping.h>
#include <asm/cacheflush.h>
#include <mach/nvdumper.h>
#define THREAD_INFO(sp) ((struct thread_info *) \
((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
#define DEBUG_REGDUMP 1
static int max_cpus;
struct nvdumper_cpu_data_t *nvdumper_cpu_data;
static dma_addr_t nvdumper_p;
void save_aar64_sys_regs(struct aar64_system_regs_t *aar64_sys_regs)
{
asm("mrs x1, ACTLR_EL1\n\t"
"str x1, [%0, #8 * 0]\n\t"
"mrs x1, AFSR0_EL1\n\t"
"str x1, [%0, #8 * 1]\n\t"
"mrs x1, AFSR1_EL1\n\t"
"str x1, [%0, #8 * 2]\n\t"
"mrs x1, AMAIR_EL1\n\t"
"str x1, [%0, #8 * 3]\n\t"
"mrs x1, CONTEXTIDR_EL1\n\t"
"str x1, [%0, #8 * 4]\n\t"
"mrs x1, CPACR_EL1\n\t"
"str x1, [%0, #8 * 5]\n\t"
"mrs x1, CSSELR_EL1\n\t"
"str x1, [%0, #8 * 6]\n\t"
"mrs x1, FAR_EL1\n\t"
"str x1, [%0, #8 * 7]\n\t"
"mrs x1, ESR_EL1\n\t"
"str x1, [%0, #8 * 8]\n\t"
"mrs x1, PAR_EL1\n\t"
"str x1, [%0, #8 * 9]\n\t"
: /* output */
: "r"(aar64_sys_regs) /* input */
: "%x1", "memory" /* clobbered register */
);
}
void nvdumper_save_regs(void *data)
{
int id = smp_processor_id();
nvdumper_cpu_data[id].current_task = current_thread_info()->task;
nvdumper_cpu_data[id].is_online = true;
__asm__ __volatile__ (
"mov %[_arm_sp], sp\n\t"
"adr %[_arm_pc], 1f\n\t"
"mov %[regx0], x0\n\t"
"mov %[regx1], x1\n\t"
"mov %[regx2], x2\n\t"
"mov %[regx3], x3\n\t"
"mov %[regx4], x4\n\t"
"mov %[regx5], x5\n\t"
"mov %[regx6], x6\n\t"
"mov %[regx7], x7\n\t"
"mov %[regx8], x8\n\t"
"mov %[regx9], x9\n\t"
"mov %[regx10], x10\n\t"
"mov %[regx11], x11\n\t"
"mov %[regx12], x12\n\t"
"mov %[regx13], x13\n\t"
"mov %[regx14], x14\n\t"
"mov %[regx15], x15\n\t"
"1:" :
[_arm_pc] "=r" (nvdumper_cpu_data[id].pt_regs.pc),
[_arm_sp] "=r" (nvdumper_cpu_data[id].pt_regs.sp),
[regx0] "=r" (nvdumper_cpu_data[id].pt_regs.regs[0]),
[regx1] "=r" (nvdumper_cpu_data[id].pt_regs.regs[1]),
[regx2] "=r" (nvdumper_cpu_data[id].pt_regs.regs[2]),
[regx3] "=r" (nvdumper_cpu_data[id].pt_regs.regs[3]),
[regx4] "=r" (nvdumper_cpu_data[id].pt_regs.regs[4]),
[regx5] "=r" (nvdumper_cpu_data[id].pt_regs.regs[5]),
[regx6] "=r" (nvdumper_cpu_data[id].pt_regs.regs[6]),
[regx7] "=r" (nvdumper_cpu_data[id].pt_regs.regs[7]),
[regx8] "=r" (nvdumper_cpu_data[id].pt_regs.regs[8]),
[regx9] "=r" (nvdumper_cpu_data[id].pt_regs.regs[9]),
[regx10] "=r" (nvdumper_cpu_data[id].pt_regs.regs[10]),
[regx11] "=r" (nvdumper_cpu_data[id].pt_regs.regs[11]),
[regx12] "=r" (nvdumper_cpu_data[id].pt_regs.regs[12]),
[regx13] "=r" (nvdumper_cpu_data[id].pt_regs.regs[13]),
[regx14] "=r" (nvdumper_cpu_data[id].pt_regs.regs[14]),
[regx15] "=r" (nvdumper_cpu_data[id].pt_regs.regs[15])
);
__asm__ __volatile__ (
"mov %[regx16], x16\n\t"
"mov %[regx17], x17\n\t"
"mov %[regx18], x18\n\t"
"mov %[regx19], x19\n\t"
"mov %[regx20], x20\n\t"
"mov %[regx21], x21\n\t"
"mov %[regx22], x22\n\t"
"mov %[regx23], x23\n\t"
"mov %[regx24], x24\n\t"
"mov %[regx25], x25\n\t"
"mov %[regx26], x26\n\t"
"mov %[regx27], x27\n\t"
"mov %[regx28], x28\n\t"
"mov %[regx29], x29\n\t"
"mov %[regx30], x30\n\t"
"1:" :
[regx16] "=r" (nvdumper_cpu_data[id].pt_regs.regs[16]),
[regx17] "=r" (nvdumper_cpu_data[id].pt_regs.regs[17]),
[regx18] "=r" (nvdumper_cpu_data[id].pt_regs.regs[18]),
[regx19] "=r" (nvdumper_cpu_data[id].pt_regs.regs[19]),
[regx20] "=r" (nvdumper_cpu_data[id].pt_regs.regs[20]),
[regx21] "=r" (nvdumper_cpu_data[id].pt_regs.regs[21]),
[regx22] "=r" (nvdumper_cpu_data[id].pt_regs.regs[22]),
[regx23] "=r" (nvdumper_cpu_data[id].pt_regs.regs[23]),
[regx24] "=r" (nvdumper_cpu_data[id].pt_regs.regs[24]),
[regx25] "=r" (nvdumper_cpu_data[id].pt_regs.regs[25]),
[regx26] "=r" (nvdumper_cpu_data[id].pt_regs.regs[26]),
[regx27] "=r" (nvdumper_cpu_data[id].pt_regs.regs[27]),
[regx28] "=r" (nvdumper_cpu_data[id].pt_regs.regs[28]),
[regx29] "=r" (nvdumper_cpu_data[id].pt_regs.regs[29]),
[regx30] "=r" (nvdumper_cpu_data[id].pt_regs.regs[30])
);
save_aar64_sys_regs(&nvdumper_cpu_data[id].aar64_sys_regs);
}
void nvdumper_crash_setup_regs(void)
{
pr_info("Enter nvdumper_crash_setup_regs\n");
on_each_cpu(nvdumper_save_regs, NULL, 1);
}
void nvdumper_copy_regs(unsigned int id, struct pt_regs *regs, void *svc_sp)
{
struct thread_info *thread_info = THREAD_INFO(svc_sp);
nvdumper_cpu_data[id].current_task = thread_info->task;
nvdumper_cpu_data[id].is_online = true;
memcpy(&nvdumper_cpu_data[id].pt_regs, regs, sizeof(struct pt_regs));
save_aar64_sys_regs(&nvdumper_cpu_data[id].aar64_sys_regs);
}
void print_cpu_data(int id)
{
struct pt_regs *pt_regs = &nvdumper_cpu_data[id].pt_regs;
struct aar64_system_regs_t *s_regs =
&nvdumper_cpu_data[id].aar64_sys_regs;
pr_info("------------------------------------------------\n");
pr_info("CPU%d Status: %s\n", id,
nvdumper_cpu_data[id].is_online ? "online" : "offline");
pr_info("current task: %p\n", nvdumper_cpu_data[id].current_task);
if (nvdumper_cpu_data[id].is_online) {
int i;
for (i = 0; i < 31; i++) {
if (i < 10) /* Keep "=" align */
pr_info("ARM_x%d = 0x%016llx\n",
i, pt_regs->regs[i]);
else
pr_info("ARM_x%d = 0x%016llx\n",
i, pt_regs->regs[i]);
}
pr_info("ARM_sp = 0x%016llx\n", pt_regs->sp);
pr_info("ARM_pc = 0x%016llx\n", pt_regs->pc);
/* Print system register */
pr_info("ACTLR_EL1 = 0x%016llx\n", s_regs->ACTLR_EL1);
pr_info("AFSR0_EL1 = 0x%016llx\n", s_regs->AFSR0_EL1);
pr_info("AFSR1_EL1 = 0x%016llx\n", s_regs->AFSR1_EL1);
pr_info("AMAIR_EL1 = 0x%016llx\n", s_regs->AMAIR_EL1);
pr_info("CONTEXTIDR_EL1 = 0x%016llx\n",
s_regs->CONTEXTIDR_EL1);
pr_info("CPACR_EL1 = 0x%016llx\n", s_regs->CPACR_EL1);
pr_info("CSSELR_EL1 = 0x%016llx\n", s_regs->CSSELR_EL1);
pr_info("FAR_EL1 = 0x%016llx\n", s_regs->FAR_EL1);
pr_info("ESR_EL1 = 0x%016llx\n", s_regs->ESR_EL1);
pr_info("PAR_EL1 = 0x%016llx\n", s_regs->PAR_EL1);
pr_info("MAIR_EL1 = 0x%016llx\n", s_regs->MAIR_EL1);
pr_info("RMR_EL1 = 0x%016llx\n", s_regs->RMR_EL1);
pr_info("SCTLR_EL1 = 0x%016llx\n", s_regs->SCTLR_EL1);
pr_info("TEECR32_EL1 = 0x%016llx\n", s_regs->TEECR32_EL1);
pr_info("TEEHBR32_EL1 = 0x%016llx\n", s_regs->TEEHBR32_EL1);
pr_info("TPIDR_EL1 = 0x%016llx\n", s_regs->TPIDR_EL1);
pr_info("TCR_EL1 = 0x%016llx\n", s_regs->TCR_EL1);
pr_info("TTBR0_EL1 = 0x%016llx\n", s_regs->TTBR0_EL1);
pr_info("TTBR1_EL1 = 0x%016llx\n", s_regs->TTBR1_EL1);
pr_info("VBAR_EL1 = 0x%016llx\n", s_regs->VBAR_EL1);
pr_info("TPIDRRO_EL0 = 0x%016llx\n", s_regs->TPIDRRO_EL0);
pr_info("TPIDR_EL0 = 0x%016llx\n", s_regs->TPIDR_EL0);
}
}
void nvdumper_print_data(void)
{
int id;
for_each_present_cpu(id)
print_cpu_data(id);
}
int nvdumper_die_handler(struct notifier_block *nb, unsigned long reason,
void *data)
{
nvdumper_crash_setup_regs();
return NOTIFY_OK;
}
static int nvdumper_panic_handler(struct notifier_block *this,
unsigned long event, void *unused)
{
#if DEBUG_REGDUMP
nvdumper_print_data();
#endif
flush_cache_all();
return NOTIFY_OK;
}
struct notifier_block nvdumper_die_notifier = {
.notifier_call = nvdumper_die_handler,
.priority = INT_MAX-1, /* priority: INT_MAX >= x >= 0 */
};
static struct notifier_block nvdumper_panic_notifier = {
.notifier_call = nvdumper_panic_handler,
.priority = INT_MAX-1, /* priority: INT_MAX >= x >= 0 */
};
int nvdumper_regdump_init(void)
{
int ret;
max_cpus = num_possible_cpus();
nvdumper_cpu_data = dma_alloc_coherent(NULL,
sizeof(struct nvdumper_cpu_data_t) * max_cpus,
&nvdumper_p, 0);
if (!nvdumper_cpu_data) {
pr_err("%s: can not allocate bounce buffer\n", __func__);
return -ENOMEM;
}
ret = register_die_notifier(&nvdumper_die_notifier);
if (ret != 0) {
pr_err("%s: registering die notifier failed with err=%d\n",
__func__, ret);
goto err_out1;
}
ret = atomic_notifier_chain_register(&panic_notifier_list,
&nvdumper_panic_notifier);
if (ret != 0) {
pr_err("%s: unable to register a panic notifier (err=%d)\n",
__func__, ret);
goto err_out2;
}
return ret;
err_out2:
unregister_die_notifier(&nvdumper_die_notifier);
err_out1:
if (nvdumper_cpu_data)
dma_free_coherent(NULL,
sizeof(struct nvdumper_cpu_data_t) * max_cpus,
nvdumper_cpu_data, nvdumper_p);
return ret;
}
void nvdumper_regdump_exit(void)
{
dma_free_coherent(NULL, sizeof(struct nvdumper_cpu_data_t) * max_cpus,
nvdumper_cpu_data, nvdumper_p);
unregister_die_notifier(&nvdumper_die_notifier);
atomic_notifier_chain_unregister(&panic_notifier_list,
&nvdumper_panic_notifier);
}
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