void __attribute__((noreturn)) eeload_start() {
void (*entry)();
__puts("EELOAD start\n");
__printf("about to SifInitRpc(0)\n");
SifInitRpc(0);
__printf("done rpc\n");
entry = (void (*)())loadElfFile("INTRO");
entry();
entry = (void (*)())loadElfFile("LOADER");
entry();
for (;;);
}
// this is the start point of execution at 0xBFC4A000
//
// it loads the IOPBTCONF module list from rom0 and compiles a
// list of modules and their addresses.
//
// this list is then passed to loadcore as it is executed in order
// to then load the rest of the modules
//
// args: total size of IOP ram in MegaBytes
// bootinfo flags
// string containing the reboot image filepath
// ? doesnt seem to be used
void _start(int ramMBSize, int bootInfo, char* udnlString, int unk)
{
ROMFS ri;
void *(*sysmem_entry)(u32 iopmemsize);
void (*loadcore_entry)(BOOT_PARAMS *init);
int i;
ROMDIR_INFO romdir_info;
ROMFILE_INFO romfile_info;
char conf_filename[10];
int ram_byte_size, num_lines;
u32 module_load_addr;
u32** modules_ptr;
char* file_data_ptr, *file_data_end;
void* psysmemstart;
BOOT_PARAMS* boot_params;
if( ramMBSize <= 2 )
ram_byte_size = 2;
else
ram_byte_size = ramMBSize;
ram_byte_size <<= 20;
// compile module list to send to loadcore
boot_params = (BOOT_PARAMS*)0x30000; // random address, has to be clear before loadcore call
boot_params->ramMBSize = ramMBSize;
boot_params->bootInfo = bootInfo;
boot_params->udnlString = NULL;
boot_params->moduleAddrs = (u32**)((u32)boot_params + sizeof(BOOT_PARAMS)); // right after
// if a undl string is specified, get a copy of it and store a pointer to it
if(udnlString)
{
boot_params->udnlString = (char*)boot_params->moduleAddrs;
kstrcpy(boot_params->udnlString, udnlString);
boot_params->moduleAddrs = (u32**)((u32)boot_params->udnlString + ROUND_UP(kstrlen(udnlString) + 8, 4));
}
// find the romdir table in the rom
if( searchRomDir((u32*)0xBFC00000, (u32*)0xBFC10000, &romdir_info) == NULL )
{
__printf("IOPBOOT: failed to find start of rom!\n");
// error - cant find romdir!
while(1) *(u8*)0x80000000 = 0;
}
// find the bootconf file in the romdir table
kstrcpy(conf_filename, "IOPBTCONF");
conf_filename[8] = '0' + bootInfo;
if( !searchFileInRom(&romdir_info, conf_filename, &romfile_info) )
{
kstrcpy(conf_filename, "IOPBTCONF");
if( !searchFileInRom(&romdir_info, conf_filename, &romfile_info) )
{
__printf("IOPBTCONF file not found!\n");
// error - cant find conf file!
while(1) *(u8*)0x80000000 = 1;
}
}
// count the number of lines in conf file
file_data_ptr = (char*)romfile_info.fileData;
file_data_end = (char*)romfile_info.fileData + romfile_info.entry->fileSize;
{
num_lines = 0;
while( file_data_ptr < file_data_end ) {
// loop until a "newline" charcter is found
while(file_data_ptr < file_data_end) {
if(*file_data_ptr++ < ' ')
break;
}
// loop until a "non-newline" charcter is found
while(file_data_ptr < file_data_end) {
if(*file_data_ptr++ >= ' ')
break;
}
num_lines++;
}
num_lines++;
}
// get the addresses of each module
{
module_load_addr = 0;
boot_params->numConfLines = num_lines-1;
modules_ptr = boot_params->moduleAddrs;
char* file_data_ptr = (char*)romfile_info.fileData;
while( file_data_ptr < file_data_end ) {
if(*file_data_ptr == '@') {
file_data_ptr++;
module_load_addr = getHexNumber(&file_data_ptr);
}
else if(*file_data_ptr == '!') {
if( file_data_ptr[1] == 'a' &&
file_data_ptr[2] == 'd' &&
file_data_ptr[3] == 'd' &&
file_data_ptr[4] == 'r' &&
file_data_ptr[5] == ' ' ) {
file_data_ptr += 6;
*modules_ptr++ = (u32*)(getHexNumber(&file_data_ptr) * 4 + 1);
*modules_ptr++ = 0;
}
}
else if(*file_data_ptr != '#') {
// 'file_data_ptr' should be pointing to a filename
// this finds the address of that file in the rom
ROMFILE_INFO module_fileinfo;
char strmodule[16];
for(i = 0; i < 16; ++i) {
if( file_data_ptr[i] < ' ' )
break;
strmodule[i] = file_data_ptr[i];
}
strmodule[i] = 0;
if( searchFileInRom(&romdir_info, strmodule, &module_fileinfo) == NULL ) {
__printf("IOPBOOT: failed to find %s module\n", strmodule);
return;
}
//__printf("mod: %s:%x\n", strmodule, module_fileinfo.fileData);
*modules_ptr++ = (u32*)module_fileinfo.fileData;
*modules_ptr = 0; // don't increment
}
// loop until a "newline" charcter is found
while(file_data_ptr < file_data_end) {
if(*file_data_ptr++ < ' ')
break;
}
// loop until a "non-newline" charcter is found
while(file_data_ptr < file_data_end) {
if(*file_data_ptr >= ' ')
break;
file_data_ptr++;
}
}
}
if( searchFileInRom(&romdir_info, "IOPBOOT", &romfile_info) == NULL ) {
__printf("loadElfFile: failed to find IOPBOOT module\n");
return;
}
// load sysmem module to memory and execute it
if( searchFileInRom(&romdir_info, "SYSMEM", &romfile_info) == NULL ) {
__printf("loadElfFile: failed to find SYSMEM module\n");
return;
}
sysmem_entry = (void *(*)(u32))loadElfFile(&romfile_info, module_load_addr);
if( sysmem_entry == 0 )
return;
psysmemstart = sysmem_entry(ram_byte_size);
//FlushIcache();
if( psysmemstart == 0 ) {
__printf("IOPBOOT: sysmem failed\n");
return;
}
__printf("SYSMEM success, start addr: %x, alloc start: %x\n", module_load_addr, psysmemstart);
if( searchFileInRom(&romdir_info, "LOADCORE", &romfile_info) == NULL ) {
__printf("loadElfFile: failed to find SYSMEM module\n");
return;
}
loadcore_entry = (void (*)())loadElfFile(&romfile_info, (u32)psysmemstart);
if( loadcore_entry == 0 )
return;
boot_params->firstModuleAddr = (u32)module_load_addr + 0x30; // skip elf?
if(0x1FC10000 < ram_byte_size) {
boot_params->pos = 0x1FC00000;
boot_params->size = 0x10100;
}
else {
boot_params->pos = 0;
boot_params->size = 0;
}
__printf("executing LOADCORE entry at %p\n", loadcore_entry);
loadcore_entry(boot_params);
__printf("iopboot error\n");
// error - loadcore shouldnt ever return
while(1) *(u8*)0x80000000 = 2;
}
