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exo: also check for rcm ipatch (thanks @balika011)

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This commit is contained in:
Michael Scire 2019-04-01 16:37:04 -07:00
parent 4d76f4d79c
commit 350dccff3d
2 changed files with 37 additions and 4 deletions
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37
exosphere/src/fuse.c
View file

@ -24,6 +24,9 @@
#include "masterkey.h"
static bool g_has_checked_for_rcm_bug_patch = false;
static bool g_has_rcm_bug_patch = false;
/* Prototypes for internal commands. */
void fuse_make_regs_visible(void);
@ -260,7 +263,37 @@ void fuse_get_hardware_info(void *dst) {
}
bool fuse_has_rcm_bug_patch(void) {
/* Only check for RCM bug patch once, and cache our result. */
if (!g_has_checked_for_rcm_bug_patch) {
/* Patched units have this bit set in reserved_sw, according to reports. */
/* TODO: Is there an ipatch we should check? This should be researched. */
return (FUSE_CHIP_REGS->FUSE_RESERVED_SW & 0x80) != 0;
if (FUSE_CHIP_REGS->FUSE_RESERVED_SW & 0x80) {
g_has_rcm_bug_patch = true;
}
/* Also check for an ipatch. */
{
uint32_t word_count = FUSE_CHIP_REGS->FUSE_FIRST_BOOTROM_PATCH_SIZE & 0x7f;
uint32_t word_addr = 191;
while (word_count) {
uint32_t word0 = fuse_hw_read(word_addr);
uint32_t ipatch_count = (word0 >> 16) & 0xf;
for (uint32_t i = 0; i < ipatch_count; i++) {
uint32_t word = fuse_hw_read(word_addr - (i + 1));
uint32_t addr = (word >> 16) * 2;
if (addr == 0x769a) {
g_has_rcm_bug_patch = true;
}
}
word_addr -= word_count;
word_count = word0 >> 25;
}
}
}
g_has_checked_for_rcm_bug_patch = true;
return g_has_rcm_bug_patch;
}

2
exosphere/src/fuse.h
View file

@ -74,7 +74,7 @@ typedef struct {
uint32_t FUSE_CP_REV;
uint32_t _0x94;
uint32_t FUSE_TSENSOR_0;
uint32_t FUSE_FIRST_BOOTROM_PATCH_SIZE_REG;
uint32_t FUSE_FIRST_BOOTROM_PATCH_SIZE;
uint32_t FUSE_SECURITY_MODE;
uint32_t FUSE_PRIVATE_KEY[0x4];
uint32_t FUSE_DEVICE_KEY;