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#include "global.h"
#include "dolphin/os/OSRtc.h"
#include "dolphin/os/OSInterrupt.h"
static void WriteSramCallback(s32 chan, OSContext* context);
static BOOL WriteSram(void* buffer, u32 offset, u32 size);
static BOOL UnlockSram(BOOL commit, u32 offset);
static SramControlBlock Scb ALIGN_DECL(32);
static void WriteSramCallback(s32 chan, OSContext* context) {
Scb.sync = WriteSram(Scb.sram + Scb.offset, Scb.offset, RTC_SRAM_SIZE - Scb.offset);
if (Scb.sync) {
Scb.offset = RTC_SRAM_SIZE;
}
}
static inline BOOL ReadSram(void* buffer) {
BOOL err;
u32 cmd;
DCInvalidateRange(buffer, RTC_SRAM_SIZE);
if (!EXILock(RTC_CHAN, RTC_DEV, 0)) {
return FALSE;
}
if (!EXISelect(RTC_CHAN, RTC_DEV, RTC_FREQ)) {
EXIUnlock(RTC_CHAN);
return FALSE;
}
cmd = RTC_CMD_READ | RTC_SRAM_ADDR;
err = FALSE;
err |= !EXIImm(RTC_CHAN, &cmd, 4, 1, NULL);
err |= !EXISync(RTC_CHAN);
err |= !EXIDma(RTC_CHAN, buffer, RTC_SRAM_SIZE, 0, NULL);
err |= !EXISync(RTC_CHAN);
err |= !EXIDeselect(RTC_CHAN);
EXIUnlock(RTC_CHAN);
return !err;
}
BOOL WriteSram(void* buffer, u32 offset, u32 size) {
BOOL err;
u32 cmd;
if (!EXILock(RTC_CHAN, RTC_DEV, WriteSramCallback)) {
return FALSE;
}
if (!EXISelect(RTC_CHAN, RTC_DEV, RTC_FREQ)) {
EXIUnlock(RTC_CHAN);
return FALSE;
}
offset <<= 6;
cmd = RTC_CMD_WRITE | RTC_SRAM_ADDR + offset;
err = FALSE;
err |= !EXIImm(RTC_CHAN, &cmd, 4, 1, NULL);
err |= !EXISync(RTC_CHAN);
err |= !EXIImmEx(RTC_CHAN, buffer, (s32)size, 1);
err |= !EXIDeselect(RTC_CHAN);
EXIUnlock(RTC_CHAN);
return !err;
}
void __OSInitSram(void) {
Scb.locked = Scb.enabled = FALSE;
Scb.sync = ReadSram(Scb.sram);
Scb.offset = RTC_SRAM_SIZE;
}
static void* LockSram(u32 offset) {
BOOL enabled;
enabled = OSDisableInterrupts();
if (Scb.locked != FALSE) {
OSRestoreInterrupts(enabled);
return NULL;
}
Scb.enabled = enabled;
Scb.locked = TRUE;
return Scb.sram + offset;
}
OSSram* __OSLockSram() {
return LockSram(0);
}
OSSramEx* __OSLockSramEx() {
return LockSram(sizeof(OSSram));
}
static BOOL UnlockSram(BOOL commit, u32 offset) {
u16* p;
if (commit) {
if (offset == 0) {
OSSram* sram = (OSSram*)Scb.sram;
if (2u < (sram->flags & 3)) {
sram->flags &= ~3;
}
sram->checkSum = sram->checkSumInv = 0;
for (p = (u16*)&sram->counterBias; p < (u16*)(Scb.sram + sizeof(OSSram)); p++) {
sram->checkSum += *p;
sram->checkSumInv += ~*p;
}
}
if (offset < Scb.offset) {
Scb.offset = offset;
}
Scb.sync = WriteSram(Scb.sram + Scb.offset, Scb.offset, RTC_SRAM_SIZE - Scb.offset);
if (Scb.sync) {
Scb.offset = RTC_SRAM_SIZE;
}
}
Scb.locked = FALSE;
OSRestoreInterrupts(Scb.enabled);
return Scb.sync;
}
BOOL __OSUnlockSram(BOOL commit) {
return UnlockSram(commit, 0);
}
BOOL __OSUnlockSramEx(BOOL commit) {
return UnlockSram(commit, sizeof(OSSram));
}
BOOL __OSSyncSram(void) {
return Scb.sync;
}
u32 OSGetSoundMode() {
OSSram* sram;
u32 mode;
sram = __OSLockSram();
mode = (sram->flags & 0x4) ? OS_SOUND_MODE_STEREO : OS_SOUND_MODE_MONO;
__OSUnlockSram(FALSE);
return mode;
}
void OSSetSoundMode(u32 mode) {
OSSram* sram;
mode <<= 2;
mode &= 4;
sram = __OSLockSram();
if (mode == (sram->flags & 4)) {
__OSUnlockSram(FALSE);
return;
}
sram->flags &= ~4;
sram->flags |= mode;
__OSUnlockSram(TRUE);
}
u8 OSGetLanguage() {
OSSram* sram;
u8 language;
sram = __OSLockSram();
language = sram->language;
__OSUnlockSram(FALSE);
return language;
}
u32 OSGetEuRgb60Mode() {
OSSram* sram;
u32 on;
sram = __OSLockSram();
on = (sram->ntd >> 6) & 0x1;
__OSUnlockSram(FALSE);
return on;
}
void OSSetEuRgb60Mode(u32 mode) {
OSSram *sram;
mode <<= 6;
mode &= 0x40;
sram = __OSLockSram();
if (mode == (sram->ntd & 0x40))
{
__OSUnlockSram(FALSE);
return;
}
sram->ntd &= ~0x40;
sram->ntd |= mode;
__OSUnlockSram(TRUE);
}
u32 OSGetProgressiveMode() {
OSSram* sram;
u32 mode;
sram = __OSLockSram();
mode = (sram->flags & 0x80) >> 7;
__OSUnlockSram(FALSE);
return mode;
}
void OSSetProgressiveMode(u32 mode) {
OSSram* sram;
mode <<= 7;
mode &= 0x80;
sram = __OSLockSram();
if (mode == (sram->flags & 0x80)) {
__OSUnlockSram(FALSE);
return;
}
sram->flags &= ~0x80;
sram->flags |= mode;
__OSUnlockSram(TRUE);
}
u16 OSGetWirelessID(s32 channel) {
OSSramEx* sram;
u16 id;
sram = __OSLockSramEx();
id = sram->wirelessPadID[channel];
__OSUnlockSramEx(FALSE);
return id;
}
void OSSetWirelessID(s32 channel, u16 id) {
OSSramEx* sram;
sram = __OSLockSramEx();
if (sram->wirelessPadID[channel] != id) {
sram->wirelessPadID[channel] = id;
__OSUnlockSramEx(TRUE);
return;
}
__OSUnlockSramEx(FALSE);
}
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