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exosphere: Add support for rebooting to a payload in IRAM.
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parent
d349bdb1f8
commit
a52e601f2e
2 changed files with 25 additions and 8 deletions
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@ -35,13 +35,26 @@ uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
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case CONFIGITEM_BATTERYPROFILE:
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g_battery_profile = (value != 0);
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break;
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case CONFIGITEM_NEEDS_REBOOT_TO_RCM:
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case CONFIGITEM_NEEDS_REBOOT:
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/* Force a reboot to RCM, if requested. */
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if (value != 0) {
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x450ull) = 0x2;
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x400ull) = 0x10;
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while (1) { }
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switch (value) {
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case REBOOT_KIND_NO_REBOOT:
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return 0;
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case REBOOT_KIND_TO_RCM:
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/* Set reboot kind = rcm. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x450ull) = 0x2;
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break;
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case REBOOT_KIND_TO_WB_PAYLOAD:
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/* Set reboot kind = warmboot. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x450ull) = 0x1;
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/* Patch bootrom to jump to payload. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x118) = 0x40010000; /* Return to start of payload. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x11C) = 0x4000FFA4; /* Overwrite bootrom return address on stack. */
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break;
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default:
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return 2;
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}
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x400ull) = 0x10;
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break;
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default:
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return 2;
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@ -187,8 +200,8 @@ uint32_t configitem_get(bool privileged, ConfigItem item, uint64_t *p_outvalue)
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((uint64_t)(exosphere_get_target_firmware() & 0xFF) << 8ull) |
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((uint64_t)(mkey_get_revision() & 0xFF) << 0ull);
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break;
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case CONFIGITEM_NEEDS_REBOOT_TO_RCM:
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/* UNOFFICIAL: The fact that we are executing means we aren't in the process of rebooting to rcm. */
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case CONFIGITEM_NEEDS_REBOOT:
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/* UNOFFICIAL: The fact that we are executing means we aren't in the process of rebooting. */
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*p_outvalue = 0;
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break;
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default:
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@ -41,9 +41,13 @@ typedef enum {
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/* These are unofficial, for usage by Exosphere. */
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CONFIGITEM_EXOSPHERE_VERSION = 65000,
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CONFIGITEM_NEEDS_REBOOT_TO_RCM = 65001,
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CONFIGITEM_NEEDS_REBOOT = 65001,
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} ConfigItem;
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#define REBOOT_KIND_NO_REBOOT 0
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#define REBOOT_KIND_TO_RCM 1
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#define REBOOT_KIND_TO_WB_PAYLOAD 2
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uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value);
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uint32_t configitem_get(bool privileged, ConfigItem item, uint64_t *p_outvalue);
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