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fix first page table address bug

This commit is contained in:
Chiharu Shirasaka 2021-03-08 07:48:15 +09:00
parent cdb09e8ddf
commit 0f617b01d9
1 changed files with 67 additions and 55 deletions
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122
tablewalker/ResetKitHelper.cpp
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@ -78,79 +78,90 @@ void printhex(unsigned int num,unsigned int *addr) {
}
}
unsigned int PhysicalRead(unsigned int addr){
unsigned int ret;
asm volatile(
"mrc p15,0,r10,c1,c0,0\n" // read ctrl regs
"mov r9,r10\n"
"bic r10, r10, #1\n"
"mcr p15,0,r10,c1,c0,0\n"// disable MMU
"ldr %0, [%1]\n"
"mcr p15,0,r9,c1,c0,0\n" // enable MMU
:"=r" (ret): "r" (addr):"r10","r9"
);
return ret;
}
extern "C" RESETKITHELPER_API BOOL RKH_IOControl(DWORD handle, DWORD dwIoControlCode, DWORD *pInBuf, DWORD nInBufSize, DWORD *pOutBuf, DWORD nOutBufSize,
PDWORD pBytesReturned){
SetLastError(0);
switch (dwIoControlCode){
case IOCTL_RKH_DO_SOFT_RESET:
wchar_t buf[256];
unsigned int TTBCR,addrmask,TTBR0,TTBR1,*table0,*table1,ram=0,ahp=0,descriptor;
wchar_t buf[256]={0};
unsigned int TTBR0,table0,table1,ram=0,ahp=0,descriptor,physaddr,vaddr=0;
asm volatile(
"msr cpsr_c, #211\n" // to supervisor mode
"mrs r0, cpsr\n"
"orr r0,r0,#0x80\n"
"msr cpsr_c,r0\n" //interrupt disable
"mov r0,#1\n"
//"mrc p15,0,r9,c1,c0,0\n" // read ctrl regs
//"bic r9, r9, #4\n" // disable DCache
//"bic r9, r9, #4096\n" // disable ICache
//"mcr p15,0,r9,c1,c0,0\n" // write ctrl regs
//"mov r9, #0\n"
//"mcr p15,0,r9,c7,c7,0\n" // invalidate cache
//"mcr p15,0,r9,c8,c7,0\n" // invalidate tlb
:::"r0"
);
OutputDebugString(L"stop interrupt\r\n");
asm volatile(
"mrc p15, 0, %1, c2, c0, 0\n"
: "=r" (TTBCR),"=r" (TTBR0),"=r" (TTBR1)
"mrc p15, 0, %0, c2, c0, 0\n"
:"=r" (TTBR0)::"r0"
);
swprintf(buf, L"TTBR=%#x\r\n", TTBR0);
OutputDebugString(buf);
for(unsigned int i=0;i<0xffffffff;i+=4096){
table0=(unsigned int *)((TTBR0&0xFFFFC000)|((i>>19)<<2));
asm volatile(
"mrc p15,0,r10,c1,c0,0\n" // read ctrl regs
"mov r9,r10\n"
"bic r10, r10, #1\n"
"mcr p15,0,r10,c1,c0,0\n"// disable MMU
"ldr %0, [%1]\n"
"mcr p15,0,r9,c1,c0,0\n" // enable MMU
:"=r" (descriptor): "r" (table0):"r10","r9","r8"
);
if((descriptor&0x3)==0)continue; //Invalid
else if((descriptor&0x3)==1){ //Page Table
table1=(unsigned int *)((descriptor&0xFFFFFC00)|((i&0xFF000)>>9));
asm volatile(
"mrc p15,0,r10,c1,c0,0\n" // read ctrl regs
"mov r9,r10\n"
"bic r10, r10, #1\n"
"mcr p15,0,r10,c1,c0,0\n"// disable MMU
"ldr %0, [%1]\n"
"mcr p15,0,r9,c1,c0,0\n" // enable MMU
:"=r" (descriptor): "r" (table1):"r10","r9","r8"
);
if(descriptor&0x3==1){//large page
swprintf(buf, L"Virt Addr=%#x : Phys Addr=%#x\r\n",i,(descriptor&0xFFFF0000)|(i&0xFFFF));
do{
table0=((TTBR0&0xFFFFC000)|((vaddr&0xFFF00000)>>18));
descriptor = PhysicalRead(table0);
if((descriptor&0x3)==0) continue; //Fault
else if((descriptor&0x3)==1){ //Coarse page table
table1=((descriptor&0xFFFFFC00)|((vaddr&0xFF000)>>9));
descriptor = PhysicalRead(table1);
if((descriptor&0x3)==0) continue;//fault
else if((descriptor&0x3)==1){//large page
physaddr=((descriptor&0xFFFF0000)|(vaddr&0xFFFF));
swprintf(buf, L"Virt Addr=%#x : Phys Addr=%#x\r\n",vaddr,physaddr);
OutputDebugString(buf);
if(((descriptor&0xFFFF0000)|(i&0xFFFF))==0x40000000)ram=i;
else if(((descriptor&0xFFFF0000)|(i&0xFFFF0000))==0x80070000)ahp=i;
}else{//small page
swprintf(buf, L"Virt Addr=%#x : Phys Addr=%#x\r\n",i,(descriptor&0xFFFFF000)|(i&0xFFF));
if(physaddr==0x40000000)ram=vaddr;
else if(physaddr==0x80070000)ahp=vaddr;
}else if((descriptor&0x3)==2){//small page
physaddr=((descriptor&0xFFFFF000)|(vaddr&0xFFF));
swprintf(buf, L"Virt Addr=%#x : Phys Addr=%#x\r\n",vaddr,physaddr);
OutputDebugString(buf);
if(((descriptor&0xFFFFF000)|(i&0xFFF))==0x40000000)ram=i;
else if(((descriptor&0xFFFFF000)|(i&0xFFF))==0x80070000)ahp=i;
if(physaddr==0x40000000)ram=vaddr;
else if(physaddr==0x80070000)ahp=vaddr;
}
}else if((descriptor&0x40000)){ //Section
swprintf(buf, L"Virt Addr=%#x : Phys Addr=%#x\r\n",i,(descriptor&0xFFF00000)|(i&0xFFFFF));
}else if((descriptor&0x3)==2){ //Section
physaddr=((descriptor&0xFFF00000)|(vaddr&0xFFFFF));
swprintf(buf, L"Virt Addr=%#x : Phys Addr=%#x\r\n",vaddr,physaddr);
OutputDebugString(buf);
if(((descriptor&0xFFF00000)|(i&0xFFFFF))==0x40000000)ram=i;
else if(((descriptor&0xFFF00000)|(i&0xFFFFF))==0x80070000)ahp=i;
}else continue; //Supersection
}
if(physaddr==0x40000000)ram=vaddr;
else if(physaddr==0x80070000)ahp=vaddr;
}else if((descriptor&0x3)==3){ //Fine page table
table1=((descriptor&0xFFFFF000)|((vaddr&0xFC000)>>7));
swprintf(buf, L"second level page table=%#x\r\n", table1);
OutputDebugString(buf);
descriptor = PhysicalRead(table1);
swprintf(buf, L"second level page table descriptor=%#x\r\n", descriptor);
OutputDebugString(buf);
if((descriptor&0x3)==0) continue;//fault
else {//tiny page
physaddr=((descriptor&0xFFFFFC00)|(vaddr&0x3FF));
swprintf(buf, L"Virt Addr=%#x : Phys Addr=%#x\r\n",vaddr,physaddr);
OutputDebugString(buf);
if(physaddr==0x40000000)ram=vaddr;
else if(physaddr==0x80070000)ahp=vaddr;
}
}
}while(vaddr+=0x1000,vaddr<0xffff0000);
swprintf(buf, L"RAM=%#x\r\nNear UART=%#x\r\n", ram, ahp);
OutputDebugString(buf);
asm volatile(
"mrs r0, cpsr\n"
"bic r0,r0,#0x80\n"
"msr cpsr_c,r0\n" //interrupt disable
:::"r0"
);
/*
if(ahp){
*((unsigned int *)(ahp+0x4000+0x30)) |= 0x101; //UART Tx Enable
@ -167,7 +178,8 @@ extern "C" RESETKITHELPER_API BOOL RKH_IOControl(DWORD handle, DWORD dwIoControl
}
*/
while(1);
return TRUE;
}
return FALSE;
}