Picklock_RCM/source/hos/sept.c

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/*
* Copyright (c) 2019 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "sept.h"
#include "../gfx/di.h"
#include "../libs/fatfs/ff.h"
#include "../mem/heap.h"
#include "../soc/pmc.h"
#include "../soc/t210.h"
#include "../storage/nx_emmc.h"
#include "../storage/sdmmc.h"
#include "../utils/btn.h"
#include "../utils/types.h"
#include "../gfx/gfx.h"
#define PATCHED_RELOC_SZ 0x94
#define WB_RST_ADDR 0x40010ED0
#define WB_RST_SIZE 0x30
u8 warmboot_reboot[] = {
0x14, 0x00, 0x9F, 0xE5, // LDR R0, =0x7000E450
0x01, 0x10, 0xB0, 0xE3, // MOVS R1, #1
0x00, 0x10, 0x80, 0xE5, // STR R1, [R0]
0x0C, 0x00, 0x9F, 0xE5, // LDR R0, =0x7000E400
0x10, 0x10, 0xB0, 0xE3, // MOVS R1, #0x10
0x00, 0x10, 0x80, 0xE5, // STR R1, [R0]
0xFE, 0xFF, 0xFF, 0xEA, // LOOP
0x50, 0xE4, 0x00, 0x70, // #0x7000E450
0x00, 0xE4, 0x00, 0x70 // #0x7000E400
};
#define SEPT_PRI_ADDR 0x4003F000
#define SEPT_PK1T_ADDR 0xC0400000
#define SEPT_PK1T_STACK 0x40008000
#define SEPT_TCSZ_ADDR (SEPT_PK1T_ADDR - 0x4)
#define SEPT_STG1_ADDR (SEPT_PK1T_ADDR + 0x2E100)
#define SEPT_STG2_ADDR (SEPT_PK1T_ADDR + 0x60E0)
#define SEPT_PKG_SZ (0x2F100 + WB_RST_SIZE)
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extern boot_cfg_t b_cfg;
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extern void sd_unmount();
extern void reloc_patcher(u32 payload_dst, u32 payload_src, u32 payload_size);
int reboot_to_sept(const u8 *tsec_fw, const u32 tsec_size, const u32 kb)
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{
FIL fp;
// Copy warmboot reboot code and TSEC fw.
memcpy((u8 *)(SEPT_PK1T_ADDR - WB_RST_SIZE), (u8 *)warmboot_reboot, sizeof(warmboot_reboot));
memcpy((void *)SEPT_PK1T_ADDR, tsec_fw, tsec_size);
*(vu32 *)SEPT_TCSZ_ADDR = tsec_size;
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// Copy sept-primary.
if (f_open(&fp, "sd:/sept/sept-primary.bin", FA_READ))
goto error;
if (f_read(&fp, (u8 *)SEPT_STG1_ADDR, f_size(&fp), NULL))
{
f_close(&fp);
goto error;
}
f_close(&fp);
// Copy sept-secondary.
if ((kb == 7) && f_open(&fp, "sd:/sept/sept-secondary.enc", FA_READ) && f_open(&fp, "sd:/sept/sept-secondary_00.enc", FA_READ))
goto error;
else if ((kb == 8) && f_open(&fp, "sd:/sept/sept-secondary_01.enc", FA_READ))
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goto error;
if (f_read(&fp, (u8 *)SEPT_STG2_ADDR, f_size(&fp), NULL))
{
f_close(&fp);
goto error;
}
f_close(&fp);
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// Save auto boot config to sept payload, if any.
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boot_cfg_t *tmp_cfg = malloc(sizeof(boot_cfg_t));
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memcpy(tmp_cfg, &b_cfg, sizeof(boot_cfg_t));
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tmp_cfg->boot_cfg |= BOOT_CFG_SEPT_RUN;
if (f_open(&fp, "sd:/sept/payload.bin", FA_READ | FA_WRITE))
goto error;
f_lseek(&fp, PATCHED_RELOC_SZ);
f_write(&fp, tmp_cfg, sizeof(boot_cfg_t), NULL);
f_close(&fp);
sd_unmount();
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gfx_printf("\n%kPress Power or Vol +/-\n%k to Reboot to Sept...", COLOR_BLUE, COLOR_VIOLET);
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btn_wait();
u32 pk1t_sept = SEPT_PK1T_ADDR - (ALIGN(PATCHED_RELOC_SZ, 0x10) + WB_RST_SIZE);
void (*sept)() = (void *)pk1t_sept;
reloc_patcher(WB_RST_ADDR, pk1t_sept, SEPT_PKG_SZ);
// Patch SDRAM init to perform an SVC immediately after second write.
PMC(APBDEV_PMC_SCRATCH45) = 0x2E38DFFF;
PMC(APBDEV_PMC_SCRATCH46) = 0x6001DC28;
// Set SVC handler to jump to sept-primary in IRAM.
PMC(APBDEV_PMC_SCRATCH33) = SEPT_PRI_ADDR;
PMC(APBDEV_PMC_SCRATCH40) = 0x6000F208;
display_end();
(*sept)();
error:
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EPRINTF("Sept files not found in sd:/sept!\nPlace appropriate files and try again.");
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display_backlight_brightness(100, 1000);
btn_wait();
return 0;
}