mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-13 08:36:35 +00:00
120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
#include "utils.h"
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#include "hwinit.h"
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#include "fuse.h"
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#include "se.h"
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#include "sd_utils.h"
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#include "stage2.h"
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#include "chainloader.h"
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#include "sdmmc.h"
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#include "lib/fatfs/ff.h"
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#include "lib/printk.h"
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#include "display/video_fb.h"
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static char g_bct0_buffer[BCTO_MAX_SIZE];
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#define DEFAULT_BCT0_FOR_DEBUG \
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"BCT0\n"\
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"[stage1]\n"\
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"stage2_path = fusee-secondary.bin\n"\
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"stage2_addr = 0xF0000000\n"\
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"stage2_entrypoint = 0xF0000000\n"
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const char *load_config(void) {
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if (!read_sd_file(g_bct0_buffer, BCTO_MAX_SIZE, "BCT.ini")) {
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printk("Failed to read BCT0 from SD!\n");
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printk("[DEBUG] Using default BCT0!\n");
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memcpy(g_bct0_buffer, DEFAULT_BCT0_FOR_DEBUG, sizeof(DEFAULT_BCT0_FOR_DEBUG));
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/* TODO: Stop using default. */
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/* printk("Error: Failed to load BCT.ini!\n");
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* generic_panic(); */
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}
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if (memcmp(g_bct0_buffer, "BCT0", 4) != 0) {
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printk("Error: Unexpected magic in BCT.ini!\n");
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generic_panic();
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}
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/* Return pointer to first line of the ini. */
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const char *bct0 = g_bct0_buffer;
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while (*bct0 && *bct0 != '\n') {
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bct0++;
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}
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if (!bct0) {
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printk("Error: BCT.ini has no newline!\n");
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generic_panic();
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}
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return bct0;
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}
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void load_sbk(void) {
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uint32_t sbk[0x4];
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/* Load the SBK into the security engine, if relevant. */
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memcpy(sbk, (void *)get_fuse_chip_regs()->FUSE_PRIVATE_KEY, 0x10);
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for (unsigned int i = 0; i < 4; i++) {
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if (sbk[i] != 0xFFFFFFFF) {
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set_aes_keyslot(0xE, sbk, 0x10);
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break;
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}
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}
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}
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int main(void) {
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const char *bct0;
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void *lfb_base = (void *)0xC0000000;
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const char *stage2_path;
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stage2_args_t stage2_args = {0};
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/* Initialize DRAM. */
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/* TODO: What can be stripped out to make this minimal? */
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nx_hwinit();
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/* Zero-fill the framebuffer and register it as printk provider. */
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video_init(lfb_base);
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/* Initialize the display. */
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display_init();
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/* Set the framebuffer. */
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display_init_framebuffer(lfb_base);
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/* Turn on the backlight after initializing the lfb */
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/* to avoid flickering. */
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display_enable_backlight(true);
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/* Say hello. */
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printk("Welcome to Atmosph\xe8re Fus\xe9" "e!\n");
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printk("Using color linear framebuffer at 0x%p!\n", lfb_base);
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#ifndef I_KNOW_WHAT_I_AM_DOING
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#error "Fusee is a work-in-progress bootloader, and is not ready for usage yet. If you want to play with it anyway, please #define I_KNOW_WHAT_I_AM_DOING -- and recognize that we will be unable to provide support until it is ready for general usage :)"
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printk("Warning: Fus\e9e is not yet completed, and not ready for general testing!\n");
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printk("Please do not seek support for it until it is done.\n");
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generic_panic();
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#endif
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/* Try to load the SBK into the security engine, if possible. */
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/* TODO: Should this be done later? */
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load_sbk();
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/* Load the BCT0 configuration ini off of the SD. */
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bct0 = load_config();
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/* Load the loader payload into DRAM. */
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load_stage2(bct0);
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f_unmount("");
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display_enable_backlight(false);
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display_end();
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/* Setup argument data. */
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stage2_path = stage2_get_program_path();
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stage2_args.version = 0;
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strcpy(stage2_args.bct0, bct0);
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strcpy(g_chainloader_arg_data, stage2_path);
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memcpy(g_chainloader_arg_data + strlen(stage2_path) + 1, &stage2_args, sizeof(stage2_args_t));
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/* Jump to Stage 2. */
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relocate_and_chainload(STAGE2_ARGC);
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return 0;
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}
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