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exo/bpc.mitm: Add support for proper shutdown.

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This commit is contained in:
Michael Scire 2019-02-21 07:05:58 -08:00
parent 0288986e14
commit a0e06cf7b2
11 changed files with 727 additions and 7 deletions
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32
exosphere/src/configitem.c
View file

@ -80,6 +80,34 @@ uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
while (1) { }
}
break;
case CONFIGITEM_NEEDS_SHUTDOWN:
/* Force a shutdown, if requested. */
{
if (value == 0) {
return 0;
}
/* Set reboot kind = warmboot. */
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x450ull) = 0x1;
/* Patch SDRAM init to perform an SVC immediately after second write */
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x634ull) = 0x2E38DFFF;
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x638ull) = 0x6001DC28;
/* Set SVC handler to jump to reboot stub in IRAM. */
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x520ull) = 0x4003F000;
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x53Cull) = 0x6000F208;
/* Copy reboot stub payload. */
ams_map_irampage(0x4003F000);
for (unsigned int i = 0; i < rebootstub_bin_size; i += 4) {
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_AMS_IRAM_PAGE) + i) = read32le(rebootstub_bin, i);
}
/* Tell rebootstub to shut down. */
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_AMS_IRAM_PAGE) + 0x10) = 0x0;
ams_unmap_irampage();
MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x400ull) = 0x10;
while (1) { }
}
break;
default:
return 2;
}
@ -228,6 +256,10 @@ uint32_t configitem_get(bool privileged, ConfigItem item, uint64_t *p_outvalue)
/* UNOFFICIAL: The fact that we are executing means we aren't in the process of rebooting. */
*p_outvalue = 0;
break;
case CONFIGITEM_NEEDS_SHUTDOWN:
/* UNOFFICIAL: The fact that we are executing means we aren't in the process of shutting down. */
*p_outvalue = 0;
break;
default:
result = 2;
break;

1
exosphere/src/configitem.h
View file

@ -42,6 +42,7 @@ typedef enum {
/* These are unofficial, for usage by Exosphere. */
CONFIGITEM_EXOSPHERE_VERSION = 65000,
CONFIGITEM_NEEDS_REBOOT = 65001,
CONFIGITEM_NEEDS_SHUTDOWN = 65002,
} ConfigItem;
#define REBOOT_KIND_NO_REBOOT 0