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brainlilo
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modified:   BrainLILOdrv.cpp
This commit is contained in:
Chiharu Shirasaka 2020-09-28 14:01:28 +09:00
parent 6fbf85a88e
commit d596552dd0
1 changed files with 24 additions and 12 deletions
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36
BrainLILOdrv.cpp
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@ -120,7 +120,7 @@ static void EDNA2_installPhysicalInvoker(){
__attribute__((noreturn))
static void EDNA2_runPhysicalInvoker(){
static void EDNA2_runPhysicalInvoker(unsigned long bootloaderphysaddr,DWORD size){
// r0=info
asm volatile("msr cpsr_c, #211\n" // to supervisor mode
"mrc p15,0,r0,c1,c0,0\n" // read ctrl regs
@ -141,10 +141,9 @@ static void EDNA2_runPhysicalInvoker(){
"mrc p15,0,r10,c1,c0,0\n" // read ctrl regs
"bic r10, r10, #5\n" // disable MMU/DCache
"mcr p15,0,r10,c1,c0,0\n" // write ctrl regs
"mov pc, r8\n"
"swi #0\n" // jump!
);
for(unsigned int i=0;i<size;i++)*((char *)(0x40002000+i))=*((char *)(bootloaderphysaddr+i));
asm volatile("swi #0\n" // jump!
);
// never reach here
@ -152,13 +151,13 @@ static void EDNA2_runPhysicalInvoker(){
}
__attribute__((noreturn))
static DWORD EDNA2_callKernelEntryPoint(){
static DWORD EDNA2_callKernelEntryPoint(unsigned long bootloaderphysaddr,DWORD size){
OutputDebugString(L"BrainLILO: disabling interrupts");
disableInterrupts();
OutputDebugString(L"BrainLILO: injecting code to internal ram");
EDNA2_installPhysicalInvoker();
OutputDebugString(L"BrainLILO: invoking");
EDNA2_runPhysicalInvoker();
EDNA2_runPhysicalInvoker(bootloaderphysaddr,size);
}
static bool doLinux(){
@ -166,8 +165,22 @@ static bool doLinux(){
TCHAR bootloaderFileName[128]=TEXT("\\Storage Card\\loader\\u-boot.bin");
HANDLE hFile;
DWORD wReadSize;
unsigned long bootloaderphysaddr;
PULONG bootloaderptr;
HINSTANCE dll;
AllocPhysMemProc AllocPhysMem;
dll=LoadLibrary(TEXT("COREDLL.DLL"));
if (dll == NULL) {
OutputDebugString(L"Cant load DLL");
return false;
}
AllocPhysMem=(AllocPhysMemProc)GetProcAddress(dll,TEXT("AllocPhysMem"));
if (AllocPhysMem == NULL) {
OutputDebugString(L"Cant load AllocPhysMem function");
return false;
}
OutputDebugString(L"BrainLILO: loading bootloader.");
hFile = CreateFile(bootloaderFileName , GENERIC_READ , 0 , NULL ,OPEN_EXISTING , FILE_ATTRIBUTE_NORMAL , NULL);
if (hFile == INVALID_HANDLE_VALUE) {
@ -178,17 +191,16 @@ static bool doLinux(){
ReadFile(hFile , bootloaderdata , GetFileSize(hFile , NULL) , &wReadSize , NULL);
CloseHandle(hFile);
PHYSICAL_ADDRESS pa;
pa.QuadPart=0x40002000;
bootloaderptr=(PULONG)MmMapIoSpace(pa,wReadSize,FALSE);
bootloaderptr=(PULONG)AllocPhysMem(wReadSize,PAGE_EXECUTE_READWRITE,0,0,&bootloaderphysaddr);
wchar_t buf[256];
swprintf(buf, L"BrainLILO: copying bootloader to 0x%08x from 0x%08x\n",(int)(bootloaderptr), (int)(bootloaderdata));
OutputDebugString(buf);
memcpy(bootloaderptr,bootloaderdata,wReadSize);
OutputDebugString(L"BrainLILO: bootloader copied");
free(bootloaderdata);
EDNA2_callKernelEntryPoint();
FreeLibrary(dll);
Sleep(100);
EDNA2_callKernelEntryPoint(bootloaderphysaddr,wReadSize);
return true;
}