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#include <dolphin/dolphin.h>
#include <dolphin/os.h>
#include <dolphin/dvd.h>
#include "__os.h"
#define TRUNC(n, a) (((u32)(n)) & ~((a)-1))
#define ROUND(n, a) (((u32)(n) + (a)-1) & ~((a)-1))
static BOOL OnReset(BOOL final);
static OSResetFunctionInfo ResetFunctionInfo = {
OnReset,
0x7F,
NULL,
NULL
};
u32 OSGetPhysicalMemSize(void) {
#if DEBUG
OSBootInfo* BootInfo = (OSBootInfo*)OSPhysicalToCached(0);
return BootInfo->memorySize;
#else
return __OSPhysicalMemSize;
#endif
}
u32 OSGetConsoleSimulatedMemSize(void) {
#if DEBUG
u32* memSize = (u32*)OSPhysicalToCached(0xF0);
return *memSize;
#else
return __OSSimulatedMemSize;
#endif
}
static BOOL OnReset(BOOL final) {
if (final != FALSE) {
__MEMRegs[8] = 0xFF;
__OSMaskInterrupts(OS_INTERRUPTMASK_MEM_RESET);
}
return TRUE;
}
void (*__OSErrorTable[])(u16, OSContext*, ...);
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_EXCEPTION_MEMORY_PROTECTION]) {
__OSErrorTable[__OS_EXCEPTION_MEMORY_PROTECTION](__OS_EXCEPTION_MEMORY_PROTECTION, context, cause, addr);
return;
}
__OSUnhandledException(__OS_EXCEPTION_MEMORY_PROTECTION, context, cause, addr);
}
void OSProtectRange(u32 chan, void* addr, u32 nBytes, u32 control) {
BOOL enabled;
u32 start;
u32 end;
u16 reg;
ASSERTLINE(206, chan < 4);
ASSERTLINE(207, (control & ~(OS_PROTECT_CONTROL_RDWR)) == 0);
if (4 <= chan) {
return;
}
control &= 3;
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 &= ~(3 << 2 * chan);
reg |= control << 2 * chan;
__MEMRegs[8] = reg;
if (control != 3) {
__OSUnmaskInterrupts(OS_INTERRUPTMASK(__OS_INTERRUPT_MEM_0 + chan));
}
OSRestoreInterrupts(enabled);
}
#ifdef __GEKKO__
static asm void Config24MB(void) {
nofralloc
li r7, 0x0
lis r4, 0x0
addi r4, r4, 0x2
lis r3, 0x8000
addi r3, r3, 0x1ff
lis r6, 0x100
addi r6, r6, 0x2
lis r5, 0x8100
addi r5, r5, 0xff
isync
mtdbatu 0, r7
mtdbatl 0, r4
mtdbatu 0, r3
isync
mtibatu 0, r7
mtibatl 0, r4
mtibatu 0, r3
isync
mtdbatu 2, r7
mtdbatl 2, r6
mtdbatu 2, r5
isync
mtibatu 2, r7
mtibatl 2, r6
mtibatu 2, r5
isync
mfmsr r3
ori r3, r3, 0x30
mtsrr1 r3
mflr r3
mtsrr0 r3
rfi
}
#endif
#ifdef __GEKKO__
static asm void Config48MB(void) {
nofralloc
li r7, 0x0
lis r4, 0x0
addi r4, r4, 0x2
lis r3, 0x8000
addi r3, r3, 0x3ff
lis r6, 0x200
addi r6, r6, 0x2
lis r5, 0x8200
addi r5, r5, 0x1ff
isync
mtdbatu 0, r7
mtdbatl 0, r4
mtdbatu 0, r3
isync
mtibatu 0, r7
mtibatl 0, r4
mtibatu 0, r3
isync
mtdbatu 2, r7
mtdbatl 2, r6
mtdbatu 2, r5
isync
mtibatu 2, r7
mtibatl 2, r6
mtibatu 2, r5
isync
mfmsr r3
ori r3, r3, 0x30
mtsrr1 r3
mflr r3
mtsrr0 r3
rfi
}
#endif
#ifdef __GEKKO__
static asm void RealMode(__REGISTER u32 addr) {
nofralloc
clrlwi addr, addr, 2
mtsrr0 addr
mfmsr addr
rlwinm addr, addr, 0, 28, 25
mtsrr1 addr
rfi
}
#endif
void __OSInitMemoryProtection(void) {
#if !DEBUG
u32 padding[9];
u32 temp;
#endif
BOOL enabled;
u32 size;
size = OSGetConsoleSimulatedMemSize();
enabled = OSDisableInterrupts();
__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 DEBUG
if (OSGetConsoleSimulatedMemSize() < OSGetPhysicalMemSize() && OSGetConsoleSimulatedMemSize() == 0x1800000)
#else
temp = OSGetConsoleSimulatedMemSize(); // not sure how else to get the order right on retail
if (temp < OSGetPhysicalMemSize() && temp == 0x1800000)
#endif
{
DCInvalidateRange((void*)0x81800000, 0x1800000);
__MEMRegs[20] = 2;
}
if (size <= 0x1800000) {
RealMode((u32)&Config24MB);
} else if (size <= 0x3000000) {
RealMode((u32)&Config48MB);
}
__OSUnmaskInterrupts(OS_INTERRUPTMASK_MEM_ADDRESS);
OSRestoreInterrupts(enabled);
}
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