OmniNX/Atmosphere
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Rewrote crt0, init, and chainloading code

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start.s, init.c, linker.ld and linker.specs are meant
to be re-used by user applications, should they remove the defines
from init.c and the .chainloader* sections from the linker script
This commit is contained in:
TuxSH
2018-05-07 23:32:45 +02:00
parent 699ddfc043
commit e8306361f0
29 changed files with 848 additions and 185 deletions
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59
fusee/fusee-secondary/src/main.c
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@@ -1,40 +1,50 @@
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <malloc.h>
#include "utils.h"
#include "hwinit.h"
#include "loader.h"
#include "chainloader.h"
#include "stage2.h"
#include "nxboot.h"
#include "console.h"
#include "sd_utils.h"
#include "fs_dev.h"
#include "display/video_fb.h"
/* TODO: Add a #define for this size, somewhere. Also, primary can only actually load 0x7000. */
static char g_bct0[0x8000];
static stage2_args_t *g_stage2_args;
/* Allow for main(int argc, void **argv) signature. */
#pragma GCC diagnostic ignored "-Wmain"
void __init_heap(void) {
extern char* fake_heap_start;
extern char* fake_heap_end;
fake_heap_start = (char*)0xF0000000;
fake_heap_end = (char*)0xFFF00000;
}
int main(int argc, void **argv) {
stage2_args_t args = {0};
loader_ctx_t *loader_ctx = get_loader_ctx();
void *framebuffer = memalign(0x1000, CONFIG_VIDEO_VISIBLE_ROWS * CONFIG_VIDEO_COLS * CONFIG_VIDEO_PIXEL_SIZE);
if (argc != STAGE2_ARGC || ((args = *((stage2_args_t *)argv[STAGE2_ARGV_ARGUMENT_STRUCT])).version != 0)) {
/* Initialize the display. */
display_init();
if (framebuffer == NULL) {
generic_panic();
}
/* Setup console/stdout. */
console_resume(args.lfb, args.console_row, args.console_col);
/* Initalize the framebuffer and console/stdout */
display_init_framebuffer(framebuffer);
console_init(framebuffer);
/* Turn on the backlight after initializing the lfb */
/* to avoid flickering. */
display_enable_backlight(true);
if (argc != STAGE2_ARGC) {
generic_panic();
}
g_stage2_args = (stage2_args_t *)argv[STAGE2_ARGV_ARGUMENT_STRUCT];
if(g_stage2_args->version != 0) {
generic_panic();
}
initialize_sd();
if(fsdev_mount_all() == -1) {
@@ -42,29 +52,32 @@ int main(int argc, void **argv) {
}
fsdev_set_default_device("sdmc");
/* Copy the BCT0 from unsafe primary memory into our memory. */
strncpy(g_bct0, args.bct0, sizeof(g_bct0));
/* TODO: What other hardware init should we do here? */
printf(u8"Welcome to Atmosphère Fusée Stage 2!\n");
printf("Stage 2 executing from: %s\n", (const char *)argv[STAGE2_ARGV_PROGRAM_PATH]);
/* This will load all remaining binaries off of the SD. */
load_payload(g_bct0);
load_payload(g_stage2_args->bct0);
printf("Loaded payloads!\n");
/* Unmount everything (this causes all open files to be flushed and closed) */
fsdev_unmount_all();
if (loader_ctx->chainload_entrypoint != NULL) {
/* TODO: What do we want to do in terms of argc/argv? */
loader_ctx->chainload_entrypoint(0, NULL);
/* Deinitialize the framebuffer and display */
display_enable_backlight(false);
display_end();
free(framebuffer);
if (loader_ctx->chainload_entrypoint != 0) {
/* TODO: What else do we want to do in terms of argc/argv? */
const char *path = get_loader_ctx()->file_paths[get_loader_ctx()->file_id_of_entrypoint];
strcpy(g_chainloader_arg_data, path);
relocate_and_chainload(1);
} else {
/* If we don't have a chainload entrypoint set, we're booting Horizon. */
nxboot_main();
}
return 0;
}