110 lines
1.7 KiB
C++
110 lines
1.7 KiB
C++
#include <stdio.h>
|
|
#include "NDS.h"
|
|
|
|
namespace CP15
|
|
{
|
|
|
|
u32 Control;
|
|
|
|
u32 DTCMSetting, ITCMSetting;
|
|
|
|
|
|
void Reset()
|
|
{
|
|
Control = 0x78; // dunno
|
|
|
|
DTCMSetting = 0;
|
|
ITCMSetting = 0;
|
|
}
|
|
|
|
|
|
void UpdateDTCMSetting()
|
|
{
|
|
if (Control & (1<<16))
|
|
{
|
|
NDS::ARM9DTCMBase = DTCMSetting & 0xFFFFF000;
|
|
NDS::ARM9DTCMSize = 256 << (DTCMSetting & 0x3E);
|
|
printf("DTCM enabled at %08X, size %X\n", NDS::ARM9DTCMBase, NDS::ARM9DTCMSize);
|
|
}
|
|
else
|
|
{
|
|
NDS::ARM9DTCMBase = 0xFFFFFFFF;
|
|
NDS::ARM9DTCMSize = 0;
|
|
printf("DTCM disabled\n");
|
|
}
|
|
}
|
|
|
|
void UpdateITCMSetting()
|
|
{
|
|
if (Control & (1<<18))
|
|
{
|
|
NDS::ARM9ITCMSize = 256 << (DTCMSetting & 0x3E);
|
|
printf("ITCM enabled at %08X, size %X\n", 0, NDS::ARM9DTCMSize);
|
|
}
|
|
else
|
|
{
|
|
NDS::ARM9ITCMSize = 0;
|
|
printf("ITCM disabled\n");
|
|
}
|
|
}
|
|
|
|
|
|
void Write(u32 id, u32 val)
|
|
{
|
|
switch (id)
|
|
{
|
|
case 0x100:
|
|
val &= 0x000FF085;
|
|
Control &= ~0x000FF085;
|
|
Control |= val;
|
|
UpdateDTCMSetting();
|
|
UpdateITCMSetting();
|
|
return;
|
|
|
|
|
|
case 0x910:
|
|
DTCMSetting = val;
|
|
UpdateDTCMSetting();
|
|
return;
|
|
case 0x911:
|
|
ITCMSetting = val;
|
|
UpdateITCMSetting();
|
|
return;
|
|
}
|
|
}
|
|
|
|
u32 Read(u32 id)
|
|
{
|
|
switch (id)
|
|
{
|
|
case 0x000: // CPU ID
|
|
case 0x003:
|
|
case 0x004:
|
|
case 0x005:
|
|
case 0x006:
|
|
case 0x007:
|
|
return 0x41059461;
|
|
|
|
case 0x001:
|
|
// cache type. todo
|
|
return 0;
|
|
|
|
case 0x002: // TCM size
|
|
return (6 << 6) | (5 << 18);
|
|
|
|
|
|
case 0x100: // control reg
|
|
return Control;
|
|
|
|
|
|
case 0x910:
|
|
return DTCMSetting;
|
|
case 0x911:
|
|
return ITCMSetting;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
}
|