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system.c
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system.c
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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "cpu.h"
#include "registers.h"
#include "system.h"
#include "task.h"
static void check_reset_cause(void)
{
uint32_t reset_source = GR_PMU_RSTSRC;
uint32_t flags = 0;
/* Clear the reset source now we have recorded it */
GR_PMU_CLRRST = 1;
if (reset_source & (1 << GC_PMU_RSTSRC_POR_LSB))
flags |= RESET_FLAG_POWER_ON;
else if (reset_source & (1 << GC_PMU_RSTSRC_EXIT_LSB))
flags |= RESET_FLAG_WAKE_PIN;
if (reset_source & (1 << GC_PMU_RSTSRC_WDOG_LSB))
flags |= RESET_FLAG_WATCHDOG;
if (reset_source & (1 << GC_PMU_RSTSRC_SOFTWARE_LSB))
flags |= RESET_FLAG_HARD;
if (reset_source & (1 << GC_PMU_RSTSRC_SYSRESET_LSB))
flags |= RESET_FLAG_SOFT;
if (reset_source & (1 << GC_PMU_RSTSRC_FST_BRNOUT_LSB))
flags |= RESET_FLAG_BROWNOUT;
if (reset_source && !flags)
flags |= RESET_FLAG_OTHER;
system_set_reset_flags(flags);
}
void system_pre_init(void)
{
check_reset_cause();
}
void system_reset(int flags)
{
/* Disable interrupts to avoid task swaps during reboot */
interrupt_disable();
if (flags & SYSTEM_RESET_HARD) /* Reset the full microcontroller */
GR_PMU_GLOBAL_RESET = GC_PMU_GLOBAL_RESET_KEY;
else /* Reset only the CPU core */
CPU_NVIC_APINT = 0x05fa0004;
/* Spin and wait for reboot; should never return */
while (1)
;
}
const char *system_get_chip_vendor(void)
{
return "g";
}
const char *system_get_chip_name(void)
{
return "cr50";
}
const char *system_get_chip_revision(void)
{
int build_date = GR_SWDP_BUILD_DATE;
int build_time = GR_SWDP_BUILD_TIME;
if ((build_date != GC_SWDP_BUILD_DATE_DEFAULT) ||
(build_time != GC_SWDP_BUILD_TIME_DEFAULT))
return GC_REVISION_STR" BUILD MISMATCH!";
else
return GC_REVISION_STR;
}
/* TODO(crosbug.com/p/33822): Where can we store stuff persistently? */
int system_get_vbnvcontext(uint8_t *block)
{
return 0;
}
int system_set_vbnvcontext(const uint8_t *block)
{
return 0;
}