mirror of
https://github.com/suchmememanyskill/TegraExplorer.git
synced 2024-11-26 05:42:07 +00:00
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/*
|
|
* 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 <stdlib.h>
|
|
|
|
#include "payload_00.h"
|
|
#include "payload_01.h"
|
|
|
|
#include <memory_map.h>
|
|
#include <libs/compr/lz.h>
|
|
#include <soc/clock.h>
|
|
#include <soc/t210.h>
|
|
|
|
// 0x4003D000: Safe for panic preserving, 0x40038000: Safe for debugging needs.
|
|
#define IPL_RELOC_TOP 0x40038000
|
|
#define IPL_PATCHED_RELOC_SZ 0x94
|
|
|
|
boot_cfg_t __attribute__((section ("._boot_cfg"))) b_cfg;
|
|
|
|
void loader_main()
|
|
{
|
|
// Preserve sections.
|
|
__asm__ ("" : : "" (b_cfg));
|
|
|
|
// Preliminary BPMP clocks init.
|
|
CLOCK(CLK_RST_CONTROLLER_CLK_SYSTEM_RATE) = 0x10; // Set HCLK div to 2 and PCLK div to 1.
|
|
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_SYS) = 0; // Set SCLK div to 1.
|
|
CLOCK(CLK_RST_CONTROLLER_SCLK_BURST_POLICY) = 0x20004444; // Set clk source to Run and PLLP_OUT2 (204MHz).
|
|
CLOCK(CLK_RST_CONTROLLER_SUPER_SCLK_DIVIDER) = 0x80000000; // Enable SUPER_SDIV to 1.
|
|
CLOCK(CLK_RST_CONTROLLER_CLK_SYSTEM_RATE) = 2; // Set HCLK div to 1 and PCLK div to 3.
|
|
CLOCK(CLK_RST_CONTROLLER_SCLK_BURST_POLICY) = 0x20003333; // Set SCLK to PLLP_OUT (408MHz).
|
|
|
|
// Get Loader and Payload size.
|
|
u32 payload_size = sizeof(payload_00) + sizeof(payload_01);
|
|
u32 *payload_addr = (u32 *)payload_00;
|
|
|
|
// Relocate payload to a safer place.
|
|
u32 bytes = ALIGN(payload_size, 4) >> 2;
|
|
u32 *addr = payload_addr + bytes - 1;
|
|
u32 *dst = (u32 *)(IPL_RELOC_TOP - 4);
|
|
while (bytes)
|
|
{
|
|
*dst = *addr;
|
|
dst--;
|
|
addr--;
|
|
bytes--;
|
|
}
|
|
|
|
// Uncompress payload parts.
|
|
u8 *src_addr = (void *)(IPL_RELOC_TOP - ALIGN(payload_size, 4));
|
|
u32 pos = LZ_Uncompress((const u8 *)src_addr, (u8*)IPL_LOAD_ADDR, sizeof(payload_00));
|
|
src_addr += (u32)payload_01 - (u32)payload_00;
|
|
LZ_Uncompress((const u8 *)src_addr, (u8*)IPL_LOAD_ADDR + pos, sizeof(payload_01));
|
|
|
|
// Copy over boot configuration storage in case it was set.
|
|
memcpy((u8 *)(IPL_LOAD_ADDR + IPL_PATCHED_RELOC_SZ), &b_cfg, sizeof(boot_cfg_t));
|
|
|
|
// Chainload.
|
|
void (*ipl_ptr)() = (void *)IPL_LOAD_ADDR;
|
|
(*ipl_ptr)();
|
|
|
|
// Halt if we managed to get out of execution.
|
|
while (true)
|
|
;
|
|
}
|