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bdk: fuse: add ipatch support for T210B01
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CTCaer
parent
331f1926d1
commit
e9587a325c
2 changed files with 69 additions and 36 deletions
100
bdk/soc/fuse.c
100
bdk/soc/fuse.c
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@ -2,7 +2,7 @@
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* Copyright (c) 2018 naehrwert
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* Copyright (c) 2018 shuffle2
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* Copyright (c) 2018 balika011
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* Copyright (c) 2019-2021 CTCaer
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* Copyright (c) 2019-2022 CTCaer
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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@ -19,6 +19,7 @@
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#include <string.h>
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#include <mem/heap.h>
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#include <sec/se.h>
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#include <sec/se_t210.h>
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#include <soc/fuse.h>
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@ -42,12 +43,19 @@ static const u32 evp_thunk_template[] = {
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0xe3822001, // ORR R2, R2, #1
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0xe8bd0003, // LDMFD SP!, {R0,R1}
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0xe12fff12, // BX R2
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// idx: 15:
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0x001007b0, // off_1007EC DCD evp_thunk_template
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0x001007f8, // off_1007F0 DCD thunk_end
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0x40004c30, // off_1007F4 DCD iram_evp_thunks
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// thunk_end is here
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};
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static const u32 evp_thunk_template_len = sizeof(evp_thunk_template);
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static const u32 evp_thunk_func_offsets_t210b01[] = {
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0x0010022c, // off_100268 DCD evp_thunk_template
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0x00100174, // off_10026C DCD thunk_end
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0x40004164, // off_100270 DCD iram_evp_thunks
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// thunk_end is here
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};
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// treated as 12bit values
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static const u32 hash_vals[] = {1, 2, 4, 8, 0, 3, 5, 6, 7, 9, 10, 11};
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@ -170,7 +178,8 @@ u32 fuse_read(u32 addr)
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void fuse_read_array(u32 *words)
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{
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u32 array_size = (hw_get_chip_id() == GP_HIDREV_MAJOR_T210B01) ? 256 : 192;
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u32 array_size = (hw_get_chip_id() == GP_HIDREV_MAJOR_T210B01) ?
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FUSE_ARRAY_WORDS_NUM_T210B01 : FUSE_ARRAY_WORDS_NUM;
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for (u32 i = 0; i < array_size; i++)
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words[i] = fuse_read(i);
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@ -180,9 +189,8 @@ static u32 _parity32_even(u32 *words, u32 count)
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{
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u32 acc = words[0];
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for (u32 i = 1; i < count; i++)
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{
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acc ^= words[i];
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}
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u32 lo = ((acc & 0xffff) ^ (acc >> 16)) & 0xff;
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u32 hi = ((acc & 0xffff) ^ (acc >> 16)) >> 8;
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u32 x = hi ^ lo;
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@ -198,26 +206,26 @@ static int _patch_hash_one(u32 *word)
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u32 bits20_31 = *word & 0xfff00000;
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u32 parity_bit = _parity32_even(&bits20_31, 1);
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u32 hash = 0;
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for (u32 i = 0; i < 12; i++)
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{
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if (*word & (1 << (20 + i)))
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{
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hash ^= hash_vals[i];
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}
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}
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if (hash == 0)
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{
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if (parity_bit == 0)
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{
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return 0;
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}
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*word ^= 1 << 24;
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return 1;
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}
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if (parity_bit == 0)
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{
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return 3;
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}
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for (u32 i = 0; i < ARRAY_SIZE(hash_vals); i++)
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{
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if (hash_vals[i] == hash)
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@ -226,6 +234,7 @@ static int _patch_hash_one(u32 *word)
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return 1;
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}
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}
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return 2;
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}
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@ -246,12 +255,10 @@ static int _patch_hash_multi(u32 *words, u32 count)
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for (u32 bitpos = 0; bitpos < 32; bitpos++)
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{
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if ((w >> bitpos) & 1)
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{
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hash ^= 0x4000 + i * 32 + bitpos;
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}
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}
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}
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}
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hash ^= bits0_14;
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// stupid but this is what original code does.
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// equivalent to original words[0] &= 0xfff00000
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@ -260,16 +267,14 @@ static int _patch_hash_multi(u32 *words, u32 count)
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if (hash == 0)
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{
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if (parity_bit == 0)
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{
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return 0;
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}
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words[0] ^= 0x8000;
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return 1;
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}
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if (parity_bit == 0)
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{
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return 3;
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}
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u32 bitcount = hash - 0x4000;
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if (bitcount < 16 || bitcount >= count * 32)
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{
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@ -277,14 +282,11 @@ static int _patch_hash_multi(u32 *words, u32 count)
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for (u32 bitpos = 0; bitpos < 15; bitpos++)
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{
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if ((hash >> bitpos) & 1)
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{
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num_set++;
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}
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}
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if (num_set != 1)
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{
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return 2;
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}
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words[0] ^= hash;
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return 1;
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}
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@ -302,24 +304,30 @@ int fuse_read_ipatch(void (*ipatch)(u32 offset, u32 value))
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word_count = FUSE(FUSE_FIRST_BOOTROM_PATCH_SIZE);
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word_count &= 0x7F;
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word_addr = 191;
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word_addr = FUSE_ARRAY_WORDS_NUM - 1;
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while (word_count)
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{
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total_read += word_count;
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if (total_read >= ARRAY_SIZE(words))
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{
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break;
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}
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for (u32 i = 0; i < word_count; i++)
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{
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words[i] = fuse_read(word_addr--);
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// Parse extra T210B01 fuses when the difference is reached.
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if (hw_get_chip_id() == GP_HIDREV_MAJOR_T210B01 &&
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word_addr == ((FUSE_ARRAY_WORDS_NUM - 1) -
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(FUSE_ARRAY_WORDS_NUM_T210B01 - FUSE_ARRAY_WORDS_NUM) / sizeof(u32)))
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{
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word_addr = FUSE_ARRAY_WORDS_NUM_T210B01 - 1;
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}
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}
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word0 = words[0];
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if (_patch_hash_multi(words, word_count) >= 2)
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{
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return 1;
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}
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u32 ipatch_count = (words[0] >> 16) & 0xF;
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if (ipatch_count)
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{
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@ -332,13 +340,14 @@ int fuse_read_ipatch(void (*ipatch)(u32 offset, u32 value))
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ipatch(addr, data);
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}
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}
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words[0] = word0;
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if ((word0 >> 25) == 0)
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break;
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if (_patch_hash_one(&word0) >= 2)
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{
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return 3;
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}
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word_count = word0 >> 25;
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}
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@ -354,29 +363,44 @@ int fuse_read_evp_thunk(u32 *iram_evp_thunks, u32 *iram_evp_thunks_len)
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u32 total_read = 0;
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int evp_thunk_written = 0;
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void *evp_thunk_dst_addr = 0;
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bool t210b01 = hw_get_chip_id() == GP_HIDREV_MAJOR_T210B01;
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u32 *evp_thunk_tmp = (u32 *)malloc(sizeof(evp_thunk_template));
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memcpy(evp_thunk_tmp, evp_thunk_template, sizeof(evp_thunk_template));
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memset(iram_evp_thunks, 0, *iram_evp_thunks_len);
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if (t210b01)
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memcpy(&evp_thunk_tmp[15], evp_thunk_func_offsets_t210b01, sizeof(evp_thunk_func_offsets_t210b01));
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word_count = FUSE(FUSE_FIRST_BOOTROM_PATCH_SIZE);
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word_count &= 0x7F;
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word_addr = 191;
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word_addr = FUSE_ARRAY_WORDS_NUM - 1;
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while (word_count)
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{
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total_read += word_count;
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if (total_read >= ARRAY_SIZE(words))
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{
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break;
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}
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for (u32 i = 0; i < word_count; i++)
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{
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words[i] = fuse_read(word_addr--);
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// Parse extra T210B01 fuses when the difference is reached.
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if (hw_get_chip_id() == GP_HIDREV_MAJOR_T210B01 &&
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word_addr == ((FUSE_ARRAY_WORDS_NUM - 1) -
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(FUSE_ARRAY_WORDS_NUM_T210B01 - FUSE_ARRAY_WORDS_NUM) / sizeof(u32)))
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{
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word_addr = FUSE_ARRAY_WORDS_NUM_T210B01 - 1;
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}
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}
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word0 = words[0];
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if (_patch_hash_multi(words, word_count) >= 2)
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{
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free(evp_thunk_tmp);
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return 1;
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}
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u32 ipatch_count = (words[0] >> 16) & 0xF;
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u32 insn_count = word_count - ipatch_count - 1;
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if (insn_count)
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@ -385,10 +409,10 @@ int fuse_read_evp_thunk(u32 *iram_evp_thunks, u32 *iram_evp_thunks_len)
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{
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evp_thunk_dst_addr = (void *)iram_evp_thunks;
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memcpy(evp_thunk_dst_addr, (void *)evp_thunk_template, evp_thunk_template_len);
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evp_thunk_dst_addr += evp_thunk_template_len;
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memcpy(evp_thunk_dst_addr, (void *)evp_thunk_tmp, sizeof(evp_thunk_template));
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evp_thunk_dst_addr += sizeof(evp_thunk_template);
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evp_thunk_written = 1;
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*iram_evp_thunks_len = evp_thunk_template_len;
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*iram_evp_thunks_len = sizeof(evp_thunk_template);
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//write32(TEGRA_EXCEPTION_VECTORS_BASE + 0x208, iram_evp_thunks);
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}
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@ -398,16 +422,22 @@ int fuse_read_evp_thunk(u32 *iram_evp_thunks, u32 *iram_evp_thunks_len)
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evp_thunk_dst_addr += thunk_patch_len;
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*iram_evp_thunks_len += thunk_patch_len;
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}
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words[0] = word0;
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if ((word0 >> 25) == 0)
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break;
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if (_patch_hash_one(&word0) >= 2)
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{
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free(evp_thunk_tmp);
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return 3;
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}
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word_count = word0 >> 25;
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}
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free(evp_thunk_tmp);
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return 0;
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}
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@ -419,7 +449,7 @@ bool fuse_check_patched_rcm()
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// Check if RCM is ipatched.
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u32 word_count = FUSE(FUSE_FIRST_BOOTROM_PATCH_SIZE) & 0x7F;
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u32 word_addr = 191;
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u32 word_addr = FUSE_ARRAY_WORDS_NUM - 1;
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while (word_count)
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{
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@ -2,7 +2,7 @@
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* Copyright (c) 2018 naehrwert
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* Copyright (c) 2018 shuffle2
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* Copyright (c) 2018 balika011
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* Copyright (c) 2019-2021 CTCaer
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* Copyright (c) 2019-2022 CTCaer
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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@ -82,6 +82,9 @@
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/*! Fuse cache registers. */
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#define FUSE_RESERVED_ODMX(x) (0x1C8 + 4 * (x))
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#define FUSE_ARRAY_WORDS_NUM 192
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#define FUSE_ARRAY_WORDS_NUM_T210B01 256
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enum
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{
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FUSE_NX_HW_TYPE_ICOSA,
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