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Implement getters for fuse values, fill out smcGetConfig

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This commit is contained in:
Michael Scire
2018-02-25 01:21:52 -08:00
parent b0079e404d
commit 82b4c6763d
8 changed files with 132 additions and 16 deletions
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88
exosphere/fuse.c
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@@ -108,6 +108,17 @@ void fuse_hw_sense(void)
fuse_wait_idle();
}
/* Disables all fuse programming. */
void fuse_disable_programming(void) {
FUSE_REGS->FUSE_DIS_PGM = 1;
}
/* Unknown exactly what this does, but it alters the contents read from the fuse cache. */
void fuse_secondary_private_key_disable(void) {
FUSE_REGS->FUSE_PRIVATEKEYDISABLE = 0x10;
}
/* Read the SKU info register from the shadow cache */
uint32_t fuse_get_sku_info(void)
{
@@ -140,4 +151,81 @@ uint32_t fuse_get_reserved_odm(uint32_t idx)
reserved_odm_val = FUSE_CHIP_REGS->FUSE_RESERVED_ODM[idx];
return reserved_odm_val;
}
/* Derive the Device ID using values in the shadow cache */
uint64_t fuse_get_device_id(void) {
uint64_t device_id = 0;
uint64_t y_coord = FUSE_CHIP_REGS->FUSE_Y_COORDINATE & 0x1FF;
uint64_t x_coord = FUSE_CHIP_REGS->FUSE_X_COORDINATE & 0x1FF;
uint64_t wafer_id = FUSE_CHIP_REGS->FUSE_WAFER_ID & 0x3F;
uint32_t lot_code = FUSE_CHIP_REGS->FUSE_LOT_CODE_0;
uint64_t fab_code = FUSE_CHIP_REGS->FUSE_FAB_CODE & 0x3F;
uint64_t derived_lot_code = 0;
for (unsigned int i = 0; i < 5; i++) {
derived_lot_code = (derived_lot_code * 0x24) + ((lot_code >> (24 - 6*i)) & 0x3F);
}
derived_lot_code &= 0x03FFFFFF;
device_id |= y_coord << 0;
device_id |= x_coord << 9;
device_id |= wafer_id << 18;
device_id |= derived_lot_code << 24;
device_id |= fab_code << 50;
return device_id;
}
/* Get the DRAM ID using values in the shadow cache */
uint32_t fuse_get_dram_id(void) {
return (FUSE_CHIP_REGS->FUSE_RESERVED_ODM[4] >> 3) & 0x7;
}
/* Derive the Hardware Type using values in the shadow cache */
uint32_t fuse_get_hardware_type(void) {
uint32_t hardware_type = ((FUSE_CHIP_REGS->FUSE_RESERVED_ODM[4] >> 7) & 2) | ((FUSE_CHIP_REGS->FUSE_RESERVED_ODM[4] >> 2) & 1);
if (hardware_type) {
if (hardware_type == 1) {
return 0;
}
if (hardware_type == 2) {
return 1;
}
} else if ((FUSE_CHIP_REGS->FUSE_SPARE_BIT[9] & 1) == 0) {
return 0;
}
return 3;
}
/* Derive the Retail Type using values in the shadow cache */
uint32_t fuse_get_retail_type(void) {
/* Retail type = IS_RETAIL | UNIT_TYPE */
uint32_t retail_type = ((FUSE_CHIP_REGS->FUSE_RESERVED_ODM[4] >> 7) & 4) | (FUSE_CHIP_REGS->FUSE_RESERVED_ODM[4] & 3);
if (retail_type == 4) { /* Standard retail unit, IS_RETAIL | 0. */
return 1;
} else if (retail_type == 3) { /* Standard dev unit, 0 | DEV_UNIT. */
return 0;
}
return 2; /* IS_RETAIL | DEV_UNIT */
}
/* Derive the 16-byte Hardware Info using values in the shadow cache, and copy to output buffer. */
void fuse_get_hardware_info(void *dst) {
uint32_t hw_info[0x4];
uint32_t unk_hw_fuse = FUSE_CHIP_REGS->_0x120 & 0x3F;
uint32_t y_coord = FUSE_CHIP_REGS->FUSE_Y_COORDINATE & 0x1FF;
uint32_t x_coord = FUSE_CHIP_REGS->FUSE_X_COORDINATE & 0x1FF;
uint32_t wafer_id = FUSE_CHIP_REGS->FUSE_WAFER_ID & 0x3F;
uint32_t lot_code_0 = FUSE_CHIP_REGS->FUSE_LOT_CODE_0;
uint32_t lot_code_1 = FUSE_CHIP_REGS->FUSE_LOT_CODE_1 & 0x0FFFFFFF;
uint32_t fab_code = FUSE_CHIP_REGS->FUSE_FAB_CODE & 0x3F;
uint32_t vendor_code = FUSE_CHIP_REGS->FUSE_VENDOR_CODE & 0xF;
/* Hardware Info = unk_hw_fuse || Y_COORD || X_COORD || WAFER_ID || LOT_CODE || FAB_CODE || VENDOR_ID */
hw_info[0] = (uint32_t)((lot_code_1 << 30) | (wafer_id << 24) | (x_coord << 15) | (y_coord << 6) | (unk_hw_fuse));
hw_info[1] = (uint32_t)((lot_code_0 << 26) | (lot_code_1 >> 2));
hw_info[2] = (uint32_t)((fab_code << 26) | (lot_code_0 >> 6));
hw_info[3] = (uint32_t)(vendor_code);
memcpy(dst, hw_info, 0x10);
}