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hekate: utilize watchdog to catch sd based hangs

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Utilize watchdog when configuring LP0/Minerva.
A problematic SD card connector can cause corrupted reads to happen and thus cause hekate to hang on a black screen.

By using a watchdog there, such issues can be avoided and the user can get notified visually.
This commit is contained in:
CTCaer 2022-06-29 12:19:19 +03:00
parent e921d8f51c
commit eba6b285ec
2 changed files with 24 additions and 7 deletions
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1
Makefile
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@ -69,6 +69,7 @@ CUSTOMDEFINES += -DNYX_VER_MJ=$(NYXVERSION_MAJOR) -DNYX_VER_MN=$(NYXVERSION_MINO
# BDK defines.
CUSTOMDEFINES += -DBDK_MALLOC_NO_DEFRAG -DBDK_MC_ENABLE_AHB_REDIRECT -DBDK_EMUMMC_ENABLE
CUSTOMDEFINES += -DBDK_WATCHDOG_FIQ_ENABLE -DBDK_RESTART_BL_ON_WDT
CUSTOMDEFINES += -DGFX_INC=$(GFX_INC) -DFFCFG_INC=$(FFCFG_INC)
#CUSTOMDEFINES += -DDEBUG

30
bootloader/main.c
View file

@ -123,7 +123,7 @@ void check_power_off_from_hos()
#define RCM_PAYLOAD_ADDR (EXT_PAYLOAD_ADDR + ALIGN(PATCHED_RELOC_SZ, 0x10))
#define COREBOOT_END_ADDR 0xD0000000
#define COREBOOT_VER_OFF 0x41
#define CBFS_DRAM_EN_ADDR 0x4003e000
#define CBFS_DRAM_EN_ADDR 0x4003E000
#define CBFS_DRAM_MAGIC 0x4452414D // "DRAM"
static void *coreboot_addr;
@ -1070,16 +1070,17 @@ out:
}
#define EXCP_EN_ADDR 0x4003FFFC
#define EXCP_MAGIC 0x30505645 // EVP0
#define EXCP_MAGIC 0x30505645 // "EVP0".
#define EXCP_TYPE_ADDR 0x4003FFF8
#define EXCP_TYPE_RESET 0x545352 // RST
#define EXCP_TYPE_UNDEF 0x464455 // UDF
#define EXCP_TYPE_PABRT 0x54424150 // PABT
#define EXCP_TYPE_DABRT 0x54424144 // DABT
#define EXCP_TYPE_RESET 0x545352 // "RST".
#define EXCP_TYPE_UNDEF 0x464455 // "UDF".
#define EXCP_TYPE_PABRT 0x54424150 // "PABT".
#define EXCP_TYPE_DABRT 0x54424144 // "DABT".
#define EXCP_TYPE_WDT 0x544457 // "WDT".
#define EXCP_LR_ADDR 0x4003FFF4
#define PSTORE_LOG_OFFSET 0x180000
#define PSTORE_RAM_SIG 0x43474244 // DBGC.
#define PSTORE_RAM_SIG 0x43474244 // "DBGC".
typedef struct _pstore_buf {
u32 sig;
@ -1138,6 +1139,9 @@ static void _show_errors()
WPRINTFARGS("hekate exception occurred (LR %08X):\n", *excp_lr);
switch (*excp_type)
{
case EXCP_TYPE_WDT:
WPRINTF("Hang detected in LP0/Minerva!");
break;
case EXCP_TYPE_RESET:
WPRINTF("RESET");
break;
@ -1155,6 +1159,7 @@ static void _show_errors()
// Clear the exception.
*excp_enabled = 0;
*excp_type = 0;
}
if (h_cfg.errors & ERR_L4T_KERNEL)
@ -1495,6 +1500,13 @@ void ipl_main()
// Mount SD Card.
h_cfg.errors |= !sd_mount() ? ERR_SD_BOOT_EN : 0;
// Check if watchdog was fired previously.
if (watchdog_fired())
goto skip_lp0_minerva_config;
// Enable watchdog protection to avoid SD corruption based hanging in LP0/Minerva config.
watchdog_start(5000000 / 2, TIMER_FIQENABL_EN); // 5 seconds.
// Save sdram lp0 config.
void *sdram_params = h_cfg.t210b01 ? sdram_get_params_t210b01() : sdram_get_params_patched();
if (!ianos_loader("bootloader/sys/libsys_lp0.bso", DRAM_LIB, sdram_params))
@ -1504,6 +1516,10 @@ void ipl_main()
if (minerva_init()) //!TODO: Add Tegra210B01 support to minerva.
h_cfg.errors |= ERR_LIBSYS_MTC;
// Disable watchdog protection.
watchdog_end();
skip_lp0_minerva_config:
// Initialize display window, backlight and gfx console.
u32 *fb = display_init_framebuffer_pitch();
gfx_init_ctxt(fb, 720, 1280, 720);