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Add simple exception handling

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This adds support for exception handling.
It should provide simple and fast reporting of crucial info and full restoration without powering off.
This commit is contained in:
CTCaer
2020-04-27 09:56:19 +03:00
parent 9a5cfdff4c
commit 0462f3b252
8 changed files with 574 additions and 9 deletions
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46
bootloader/main.c
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@@ -1182,8 +1182,24 @@ static void _patched_rcm_protection()
sdmmc_storage_end(&storage);
}
#define EXCP_EN_ADDR 0x4003FFFC
#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_LR_ADDR 0x4003FFF4
static void _show_errors()
{
u32 *excp_enabled = (u32 *)EXCP_EN_ADDR;
u32 *excp_type = (u32 *)EXCP_TYPE_ADDR;
u32 *excp_lr = (u32 *)EXCP_LR_ADDR;
if (*excp_enabled == EXCP_MAGIC)
h_cfg.errors |= ERR_EXCEPT_ENB;
if (h_cfg.errors)
{
gfx_clear_grey(0x1B);
@@ -1195,7 +1211,35 @@ static void _show_errors()
if (h_cfg.errors & ERR_SYSOLD_MTC)
WPRINTF("Missing or old Minerva library!\n");
WPRINTF("\nUpdate your bootloader folder!\n\n");
if (h_cfg.errors & ~ERR_EXCEPT_ENB)
{
WPRINTF("\nUpdate your bootloader folder!\n\n");
}
if (h_cfg.errors & ERR_EXCEPT_ENB)
{
WPRINTFARGS("An exception happened (LR %08X):\n", *excp_lr);
switch (*excp_type)
{
case EXCP_TYPE_RESET:
WPRINTF("Reset");
break;
case EXCP_TYPE_UNDEF:
WPRINTF("Undefined instruction");
break;
case EXCP_TYPE_PABRT:
WPRINTF("Prefetch abort");
break;
case EXCP_TYPE_DABRT:
WPRINTF("Data abort");
break;
}
WPRINTF("\n");
// Clear the exception.
*excp_enabled = 0;
}
WPRINTF("Press any key...");
msleep(2000);