mirror of
https://github.com/fail0verflow/mini.git
synced 2024-06-28 05:56:07 +02:00
328 lines
6.7 KiB
C
328 lines
6.7 KiB
C
#include "types.h"
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#include "utils.h"
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#include "start.h"
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#include "hollywood.h"
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#include "sdhc.h"
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#include "string.h"
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#include "memory.h"
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#include "elf.h"
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#include "gecko.h"
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#include "ff.h"
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#include "lcd.h"
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void hexline(void *addr, int len)
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{
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u8 *p = (u8*)addr;
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while(len--) {
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gecko_printf("%02x",*p++);
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}
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}
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typedef struct {
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u32 hdrsize;
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u32 loadersize;
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u32 elfsize;
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u32 argument;
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} ioshdr;
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int dogecko;
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void boot2_loadelf(u8 *elf) {
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if(dogecko)
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gecko_puts("Loading boot2 ELF...\n");
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if(memcmp("\x7F" "ELF\x01\x02\x01\x61\x01",elf,9)) {
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if(dogecko)
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gecko_printf("Invalid ELF header! 0x%02x 0x%02x 0x%02x 0x%02x\n",elf[0], elf[1], elf[2], elf[3]);
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panic(0xE3);
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}
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Elf32_Ehdr *ehdr = (Elf32_Ehdr*)elf;
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if(ehdr->e_phoff == 0) {
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if(dogecko)
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gecko_printf("ELF has no program headers!\n");
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panic(0xE4);
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}
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int count = ehdr->e_phnum;
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Elf32_Phdr *phdr = (Elf32_Phdr*)(elf + ehdr->e_phoff);
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if(dogecko)
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gecko_printf("PHDRS at %p\n",phdr);
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while(count--)
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{
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if(phdr->p_type != PT_LOAD) {
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if(dogecko)
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gecko_printf("Skipping PHDR of type %d\n",phdr->p_type);
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} else {
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void *src = elf + phdr->p_offset;
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if(dogecko)
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gecko_printf("LOAD %p -> %p [0x%x]\n",src, phdr->p_paddr, phdr->p_filesz);
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memcpy(phdr->p_paddr, src, phdr->p_filesz);
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}
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phdr++;
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}
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if(dogecko)
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gecko_puts("Done!\n");
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}
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#define BOOT_FILE "/system/iosboot.bin"
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FATFS fatfs;
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void turn_stuff_on(void)
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{
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clear32(HW_GPIO1OUT, 0x10);
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udelay(100);
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set32(HW_RESETS, 0x7FFFFCF);
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}
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void reset_audio(u8 flag)
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{
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// GPIO2IN is probably mislabeled
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if(flag)
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clear32(HW_DIFLAGS, 0x180);
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else
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mask32(HW_DIFLAGS, 0x80, 0x100);
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clear32(HW_GPIO2IN, 0x80000000);
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udelay(2);
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clear32(HW_GPIO2IN, 0x40000000);
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if(flag) {
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clear32(HW_GPIO2IN, 0x10000000);
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mask32(HW_GPIO2DIR, 0x7FFFFFF, 0x4B0FFCE);
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} else {
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mask32(HW_GPIO2DIR, 0x7FFFFFF, 0x4640FC0);
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}
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udelay(10);
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set32(HW_GPIO2IN, 0x40000000);
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udelay(500);
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set32(HW_GPIO2IN, 0x80000000);
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udelay(2);
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}
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void regs_setup(void)
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{
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u8 hwood_ver, hwood_hi, hwood_lo;
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hwood_ver = read32(0xd800214);
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hwood_hi = hwood_ver >> 4; //R0
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hwood_lo = hwood_ver & 0xF; //R1
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*(u32*)0xFFFF897C = *(u32*)0xFFFF86D0;
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set32(HW_EXICTRL, EXICTRL_ENABLE_EXI);
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mem_protect(1, (void*)0x13420000, (void*)0x1fffffff);
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clear32(HW_EXICTRL, 0x10);
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if(hwood_hi == 0)
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write32(0xd8b0010, 0);
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write32(0xd8b0010, 0);
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if(hwood_hi == 1 && hwood_lo == 0)
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mask32(0xd800140, 0x0000FFF0, 1);
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set32(0xd80018C, 0x400);
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set32(0xd80018C, 0x800);
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reset_audio(0);
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//boot2_sub_FFFF5D08(0);
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//boot2_sub_FFFF5C40(hwood_hi);
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//boot2_sub_FFFF6AA8();
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turn_stuff_on();
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// what do these two pokes do? no clue. Not needed but I'm leaving them in anyway.
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write32(0xd8001e0, 0x65244A); //?
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write32(0xd8001e4, 0x46A024); //?
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clear32(HW_GPIO1OWNER, 0x10);
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set32(HW_GPIO1DIR, 0x10);
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//write32(HW_ALARM,0);
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//write32(HW_ALARM,0);
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}
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void hex32(u32 x) {
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int i;
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u8 b;
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for(i=0;i<8;i++) {
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b = x >> 28;
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if(b > 9)
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lcd_putchar(b-10+'a');
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else
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lcd_putchar(b+'0');
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x <<= 4;
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}
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}
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extern void *__end;
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void *_main(void *base)
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{
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FRESULT fres;
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ioshdr *hdr = (ioshdr*)base;
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ioshdr *iosboot;
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u8 *elf;
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elf = (u8*) base;
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elf += hdr->hdrsize + hdr->loadersize;
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dogecko = 1;
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debug_output(0xF1);
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mem_setswap(1);
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write32(HW_IRQENABLE, 0);
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clear32(HW_GPIO1DIR, 0x80);
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clear32(HW_GPIO1OWNER, 0x80);
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udelay(10000);
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if(read32(HW_GPIO1IN) & 0x80) {
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dogecko = 0;
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goto boot2;
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}
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// NOTE: END DEBUG CRITICAL ZONE
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lcd_init();
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regs_setup();
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//debug_output(0x50);
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//debug_output(0x51);
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debug_output(0xF8);
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gecko_init();
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debug_output(0xF9);
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lcd_puts("BootMii v0.1\n");
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if(dogecko) {
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gecko_puts("Hello, world from Starlet again!\n");
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gecko_puts("BootMii here, version 0.1\n");
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gecko_printf("BOOT2 header (@%p):\n",hdr);
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gecko_printf(" Header size: %08x\n", hdr->hdrsize);
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gecko_printf(" Loader size: %08x\n", hdr->loadersize);
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gecko_printf(" ELF size: %08x\n", hdr->elfsize);
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gecko_printf(" Argument: %08x\n", hdr->argument);
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gecko_printf("ELF at %p\n",elf);
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gecko_puts("Trying to mount SD...\n");
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}
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fres = f_mount(0, &fatfs);
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if(fres != FR_OK) {
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if(dogecko)
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gecko_printf("Error %d while trying to mount SD\n", fres);
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debug_output(0x12);
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debug_output(fres&0xFF);
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goto boot2;
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}
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//debug_output(0xF2);
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if(dogecko)
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gecko_puts("Trying to open SD:" BOOT_FILE "\n");
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FIL fd;
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u32 read;
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fres = f_open(&fd, BOOT_FILE, FA_READ);
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if(fres != FR_OK) {
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if(dogecko)
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gecko_printf("Error %d while trying to open file\n", fres);
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//debug_output(0x13);
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//debug_output(fres&0xFF);
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goto boot2;
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}
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lcd_puts(".");
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// NOTE: END CRITICAL ZONE
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// anything from here to boot2: shouldn't be able to cause a brick
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debug_output(0xF2);
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iosboot = (ioshdr *)ALIGN_FORWARD(((u32)&__end) + 0x100, 0x100);
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if(dogecko)
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gecko_printf("Trying to read IOSBOOT header to %p\n", iosboot);
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fres = f_read(&fd, iosboot, sizeof(ioshdr), &read);
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if(fres != FR_OK) {
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if(dogecko)
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gecko_printf("Error %d while trying to read file header\n", fres);
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//debug_output(0x14);
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//debug_output(fres&0xFF);
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goto boot2;
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}
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if(read != sizeof(ioshdr)) {
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if(dogecko)
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gecko_printf("Got %d bytes, expected %d\n", read, sizeof(ioshdr));
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//debug_output(0x24);
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goto boot2;
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}
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lcd_puts(".");
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//debug_output(0xF5);
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if(dogecko) {
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gecko_printf("IOSBOOT header (@%p):\n",iosboot);
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gecko_printf(" Header size: %08x\n", iosboot->hdrsize);
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gecko_printf(" Loader size: %08x\n", iosboot->loadersize);
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gecko_printf(" ELF size: %08x\n", iosboot->elfsize);
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gecko_printf(" Argument: %08x\n", iosboot->argument);
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}
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u32 totalsize = iosboot->hdrsize + iosboot->loadersize + iosboot->elfsize;
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if(dogecko) {
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gecko_printf("Total IOSBOOT size: 0x%x\n", totalsize);
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gecko_printf("Trying to read IOSBOOT to %p\n", iosboot);
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}
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fres = f_read(&fd, iosboot+1, totalsize-sizeof(ioshdr), &read);
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if(fres != FR_OK) {
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if(dogecko)
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gecko_printf("Error %d while trying to read file header\n", fres);
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//debug_output(0x15);
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//debug_output(fres&0xFF);
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goto boot2;
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}
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if(read != (totalsize-sizeof(ioshdr))) {
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if(dogecko)
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gecko_printf("Got %d bytes, expected %d\n", read, (totalsize-sizeof(ioshdr)));
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//debug_output(0x25);
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goto boot2;
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}
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lcd_puts(".");
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//debug_output(0xF6);
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if(dogecko) {
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gecko_puts("IOSBOOT read\n");
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gecko_printf("Setting argument to %p\n", base);
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}
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iosboot->argument = (u32)base;
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void *entry = (void*)(((u32)iosboot) + iosboot->hdrsize);
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lcd_puts(" \x7e IOSBOOT \n");
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if(dogecko)
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gecko_printf("Launching IOSBOOT @ %p\n",entry);
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debug_output(0xF3);
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return entry;
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boot2:
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debug_output(0xC8);
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if(dogecko)
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gecko_puts("Couldn't load from SD, falling back to boot2\n");
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lcd_puts(" \x7e BOOT2 \n");
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boot2_loadelf(elf);
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debug_output(0xC9);
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return (void *) 0xFFFF0000;
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}
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