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#include <dolphin/os.h>
#define TRUNC(n, a) (((u32)(n)) & ~((a)-1))
#define ROUND(n, a) (((u32)(n) + (a)-1) & ~((a)-1))
vu16 __MEMRegs[64] : 0xCC004000;
extern OSErrorHandler __OSErrorTable[16];
static BOOL OnReset(BOOL final);
static OSResetFunctionInfo ResetFunctionInfo = {
OnReset,
127,
};
#ifdef FULL_FRANK
static BOOL OnReset(BOOL final) {
if (final != FALSE) {
__MEMRegs[8] = 0xFF;
__OSMaskInterrupts(0xf0000000);
}
return TRUE;
}
#else
#pragma push
#pragma optimization_level 0
#pragma optimizewithasm off
static asm BOOL OnReset(BOOL final) {
nofralloc
mflr r0
cmpwi r3, 0
stw r0, 4(r1)
stwu r1, -8(r1)
beq @1
lis r3, __MEMRegs+16@ha
li r0, 0xff
sth r0, __MEMRegs+16@l(r3)
lis r3, 0xf000
bl __OSMaskInterrupts
@1
li r3, 1
lwz r0, 0xc(r1)
addi r1, r1, 8
mtlr r0
blr
}
#pragma pop
#endif
u32 OSGetPhysicalMemSize() { return *(u32*)(OSPhysicalToCached(0x0028)); }
u32 OSGetConsoleSimulatedMemSize() { return *(u32*)(OSPhysicalToCached(0x00F0)); }
static void MEMIntrruptHandler(__OSInterrupt interrupt, OSContext* context) {
u32 addr;
u32 cause;
cause = __MEMRegs[0xf];
addr = (((u32)__MEMRegs[0x12] & 0x3ff) << 16) | __MEMRegs[0x11];
__MEMRegs[0x10] = 0;
if (__OSErrorTable[OS_ERROR_PROTECTION]) {
__OSErrorTable[OS_ERROR_PROTECTION](OS_ERROR_PROTECTION, context, cause, addr);
return;
}
__OSUnhandledException(OS_ERROR_PROTECTION, context, cause, addr);
}
void OSProtectRange(u32 chan, void* addr, u32 nBytes, u32 control) {
BOOL enabled;
u32 start;
u32 end;
u16 reg;
if (4 <= chan) {
return;
}
control &= OS_PROTECT_CONTROL_RDWR;
end = (u32)addr + nBytes;
start = TRUNC(addr, 1u << 10);
end = ROUND(end, 1u << 10);
DCFlushRange((void*)start, end - start);
enabled = OSDisableInterrupts();
__OSMaskInterrupts(OS_INTERRUPTMASK(__OS_INTERRUPT_MEM_0 + chan));
__MEMRegs[0 + 2 * chan] = (u16)(start >> 10);
__MEMRegs[1 + 2 * chan] = (u16)(end >> 10);
reg = __MEMRegs[8];
reg &= ~(OS_PROTECT_CONTROL_RDWR << 2 * chan);
reg |= control << 2 * chan;
__MEMRegs[8] = reg;
if (control != OS_PROTECT_CONTROL_RDWR) {
__OSUnmaskInterrupts(OS_INTERRUPTMASK(__OS_INTERRUPT_MEM_0 + chan));
}
OSRestoreInterrupts(enabled);
}
asm void Config24MB() {
nofralloc
addi r7,r0,0
addis r4,r0,0x00000002@ha
addi r4,r4,0x00000002@l
addis r3,r0,0x800001ff@ha
addi r3,r3,0x800001ff@l
addis r6,r0,0x01000002@ha
addi r6,r6,0x01000002@l
addis r5,r0,0x810000ff@ha
addi r5,r5,0x810000ff@l
isync
mtspr dbat0u,r7
mtspr dbat0l,r4
mtspr dbat0u,r3
isync
mtspr ibat0u,r7
mtspr ibat0l,r4
mtspr ibat0u,r3
isync
mtspr dbat2u,r7
mtspr dbat2l,r6
mtspr dbat2u,r5
isync
mtspr ibat2u,r7
mtspr ibat2l,r6
mtspr ibat2u,r5
isync
mfmsr r3
ori r3, r3, 0x30
mtsrr1 r3
mflr r3
mtsrr0 r3
rfi
}
asm void Config48MB() {
nofralloc
addi r7,r0,0x0000
addis r4,r0,0x00000002@ha
addi r4,r4,0x00000002@l
addis r3,r0,0x800003ff@ha
addi r3,r3,0x800003ff@l
addis r6,r0,0x02000002@ha
addi r6,r6,0x02000002@l
addis r5,r0,0x820001ff@ha
addi r5,r5,0x820001ff@l
isync
mtspr dbat0u,r7
mtspr dbat0l,r4
mtspr dbat0u,r3
isync
mtspr ibat0u,r7
mtspr ibat0l,r4
mtspr ibat0u,r3
isync
mtspr dbat2u,r7
mtspr dbat2l,r6
mtspr dbat2u,r5
isync
mtspr ibat2u,r7
mtspr ibat2l,r6
mtspr ibat2u,r5
isync
mfmsr r3
ori r3, r3, 0x30
mtsrr1 r3
mflr r3
mtsrr0 r3
rfi
}
asm void RealMode(register u32 addr) {
nofralloc
clrlwi r3, r3, 2
mtsrr0 r3
mfmsr r3
rlwinm r3, r3, 0, 28, 25
mtsrr1 r3
rfi
}
void __OSInitMemoryProtection() {
u32 padding[8];
u32 simulatedSize;
BOOL enabled;
simulatedSize = OSGetConsoleSimulatedMemSize();
enabled = OSDisableInterrupts();
if (simulatedSize <= 0x1800000) {
RealMode((u32)&Config24MB);
} else if (simulatedSize <= 0x3000000) {
RealMode((u32)&Config48MB);
}
__MEMRegs[16] = 0;
__MEMRegs[8] = 0xFF;
__OSMaskInterrupts(OS_INTERRUPTMASK_MEM_0 | OS_INTERRUPTMASK_MEM_1 | OS_INTERRUPTMASK_MEM_2 |
OS_INTERRUPTMASK_MEM_3);
__OSSetInterruptHandler(__OS_INTERRUPT_MEM_0, MEMIntrruptHandler);
__OSSetInterruptHandler(__OS_INTERRUPT_MEM_1, MEMIntrruptHandler);
__OSSetInterruptHandler(__OS_INTERRUPT_MEM_2, MEMIntrruptHandler);
__OSSetInterruptHandler(__OS_INTERRUPT_MEM_3, MEMIntrruptHandler);
__OSSetInterruptHandler(__OS_INTERRUPT_MEM_ADDRESS, MEMIntrruptHandler);
OSRegisterResetFunction(&ResetFunctionInfo);
if (OSGetConsoleSimulatedMemSize() < OSGetPhysicalMemSize() &&
OSGetConsoleSimulatedMemSize() == 0x1800000) {
__MEMRegs[20] = 2;
}
__OSUnmaskInterrupts(OS_INTERRUPTMASK_MEM_ADDRESS);
OSRestoreInterrupts(enabled);
}
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