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Refactor AutoRCM tools

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This commit is contained in:
CTCaer
2020-12-26 16:38:21 +02:00
parent 2628044ba8
commit a85891ae00
8 changed files with 92 additions and 59 deletions
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16
bootloader/main.c
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@@ -1134,25 +1134,25 @@ static void _patched_rcm_protection()
sdmmc_storage_set_mmc_partition(&storage, EMMC_BOOT0);
u32 sector;
u8 corr_mod_byte0;
if ((fuse_read_odm(4) & 3) != 3)
corr_mod_byte0 = 0xF7;
else
corr_mod_byte0 = 0x37;
u8 corr_mod0, mod1;
// Get the correct RSA modulus byte masks.
nx_emmc_get_autorcm_masks(&corr_mod0, &mod1);
// Iterate BCTs.
for (u32 i = 0; i < 4; i++)
{
sector = 1 + (32 * i); // 0x4000 bct + 0x200 offset.
sdmmc_storage_read(&storage, sector, 1, buf);
// Check if 2nd byte of modulus is correct.
if (buf[0x11] != 0x86)
if (buf[0x11] != mod1)
continue;
// If AutoRCM is enabled, disable it.
if (buf[0x10] != corr_mod_byte0)
if (buf[0x10] != corr_mod0)
{
buf[0x10] = corr_mod_byte0;
buf[0x10] = corr_mod0;
sdmmc_storage_write(&storage, sector, 1, buf);
}