mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-23 18:56:03 +00:00
124 lines
3.9 KiB
C
124 lines
3.9 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 "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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/* TODO: Should we allow more than 32K for the BCT0? */
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#define BCT0_LOAD_ADDRESS (uintptr_t)(0x40038000)
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#define BCT0_LOAD_END_ADDRESS (uintptr_t)(0x4003F000)
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#define MAGIC_BCT0 0x30544342
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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 = 0xFFF00000\n"\
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"stage2_entrypoint = 0xFFF00000\n"
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const char *load_config(void) {
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if (!read_sd_file((void *)BCT0_LOAD_ADDRESS, BCT0_LOAD_END_ADDRESS - BCT0_LOAD_ADDRESS, "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((void *)BCT0_LOAD_ADDRESS, 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 ((*((u32 *)(BCT0_LOAD_ADDRESS))) != MAGIC_BCT0) {
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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 = (const char *)BCT0_LOAD_ADDRESS;
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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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stage2_entrypoint_t stage2_entrypoint;
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void **stage2_argv = (void **)(BCT0_LOAD_END_ADDRESS);
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const char *bct0;
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u32 *lfb_base;
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char buf[0x400];
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memset(buf, 0xCC, 0x400);
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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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/* Initialize the display. */
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display_init();
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/* Register the display as a printk provider. */
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lfb_base = display_init_framebuffer();
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video_init(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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stage2_entrypoint = load_stage2(bct0);
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/* Setup argv. */
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memset(stage2_argv, 0, STAGE2_ARGC * sizeof(*stage2_argv));
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stage2_argv[STAGE2_ARGV_PROGRAM_PATH] = (void *)stage2_get_program_path();
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stage2_argv[STAGE2_ARGV_ARGUMENT_STRUCT] = &stage2_argv[STAGE2_ARGC];
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stage2_args_t *args = (stage2_args_t *)stage2_argv[STAGE2_ARGV_ARGUMENT_STRUCT];
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/* Setup arguments struct. */
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args->version = 0;
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args->bct0 = bct0;
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args->lfb = (uint32_t *)lfb_base;
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args->console_col = video_get_col();
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args->console_row = video_get_row();
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f_unmount("");
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/* Jump to Stage 2. */
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stage2_entrypoint(STAGE2_ARGC, stage2_argv);
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return 0;
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}
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