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//
// Created by red031000 on 2020-05-21.
//
#include "OS_spinLock.h"
#include "OS_system.h"
#include "function_target.h"
#include "mmap.h"
#include "MI_exMemory.h"
extern void MIi_CpuClear32(u32 param1, void * addr, u32 length); //not too sure about names
extern u32 MI_SwapWord(u32 data, volatile u32* destp);
ARM_FUNC void OS_InitLock(void)
{
static BOOL isInitialized = FALSE;
if (isInitialized)
{
return;
}
isInitialized = TRUE;
OSLockWord* lockp = (OSLockWord *)HW_INIT_LOCK_BUF;
lockp->lockFlag = 0;
(void)OS_TryLockByWord(0x7e, lockp, NULL);
while (lockp->extension)
{
OSi_WaitByLoop();
}
((u32 *)HW_LOCK_ID_FLAG_MAIN)[0] = 0xffffffff;
((u32 *)HW_LOCK_ID_FLAG_MAIN)[1] = 0xffff0000;
MIi_CpuClear32(0x0, (void *)HW_SHARED_LOCK_BUF, 0x28);
MIi_SetCardProcessor(MI_PROCESSOR_ARM7);
MIi_SetCartridgeProcessor(MI_PROCESSOR_ARM7);
(void)OS_UnlockByWord(0x7e, lockp, NULL);
(void)OS_TryLockByWord(0x7f, lockp, NULL);
}
ARM_FUNC s32 OSi_DoLockByWord(u16 lockId, OSLockWord *lockp, void (*ctrlFuncp) (void),
BOOL disableFiq)
{
s32 lastLockFlag;
while ((lastLockFlag = OSi_DoTryLockByWord(lockId, lockp, ctrlFuncp, disableFiq)) > 0) {
OSi_WaitByLoop();
}
return lastLockFlag;
}
ARM_FUNC s32 OS_TryLockByWord(u16 lockId, OSLockWord *lockp, void (*ctrlFuncp) (void))
{
return OSi_DoLockByWord(lockId, lockp, ctrlFuncp, FALSE);
}
ARM_FUNC s32 OSi_DoUnlockByWord(u16 lockID, OSLockWord *lockp, void (*ctrlFuncp) (void),
BOOL disableFIQ)
{
if (lockID != lockp->ownerID)
{
return -2;
}
OSIntrMode lastIntrMode = (disableFIQ) ? OS_DisableInterrupts_IrqAndFiq() : OS_DisableInterrupts();
lockp->ownerID = 0;
if (ctrlFuncp)
{
ctrlFuncp();
}
lockp->lockFlag = 0;
if (disableFIQ)
{
(void)OS_RestoreInterrupts_IrqAndFiq(lastIntrMode);
}
else
{
(void)OS_RestoreInterrupts(lastIntrMode);
}
return 0;
}
ARM_FUNC s32 OS_UnlockByWord(u16 lockID, OSLockWord* lockp, void (*ctrlFuncp) (void))
{
return OSi_DoUnlockByWord(lockID, lockp, ctrlFuncp, FALSE);
}
ARM_FUNC s32 OSi_DoTryLockByWord(u16 lockID, OSLockWord *lockp, void (*ctrlFuncp) (void),
BOOL disableFiq)
{
OSIntrMode lastIntrMode = (disableFiq) ? OS_DisableInterrupts_IrqAndFiq() : OS_DisableInterrupts();
s32 lastLockFlag = (s32)MI_SwapWord(lockID, &lockp->lockFlag);
if (!lastLockFlag)
{
if (ctrlFuncp)
{
ctrlFuncp();
}
lockp->ownerID = lockID;
}
if (disableFiq)
{
(void)OS_RestoreInterrupts_IrqAndFiq(lastIntrMode);
}
else
{
(void)OS_RestoreInterrupts(lastIntrMode);
}
return lastLockFlag;
}
ARM_FUNC s32 OS_LockCartridge(u16 lockID)
{
return OSi_DoLockByWord(lockID, (OSLockWord *)HW_CTRDG_LOCK_BUF, OSi_AllocateCartridgeBus, TRUE);
}
ARM_FUNC s32 OS_UnlockCartridge(u16 lockID)
{
return OSi_DoUnlockByWord(lockID, (OSLockWord *)HW_CTRDG_LOCK_BUF, OSi_FreeCartridgeBus, TRUE);
}
ARM_FUNC s32 OS_TryLockCartridge(u16 lockID)
{
return OSi_DoTryLockByWord(lockID, (OSLockWord *)HW_CTRDG_LOCK_BUF, OSi_AllocateCartridgeBus, TRUE);
}
ARM_FUNC void OSi_AllocateCartridgeBus(void)
{
MIi_SetCartridgeProcessor(MI_PROCESSOR_ARM9);
}
ARM_FUNC void OSi_FreeCartridgeBus(void)
{
MIi_SetCartridgeProcessor(MI_PROCESSOR_ARM7);
}
ARM_FUNC s32 OS_TryLockCard(u16 lockID)
{
return OS_TryLockByWord(lockID, (OSLockWord *)HW_CARD_LOCK_BUF, OSi_AllocateCardBus);
}
ARM_FUNC s32 OS_UnlockCard(u16 lockID)
{
return OS_UnlockByWord(lockID, (OSLockWord *)HW_CARD_LOCK_BUF, OSi_FreeCardBus);
}
ARM_FUNC void OSi_AllocateCardBus(void)
{
MIi_SetCardProcessor(MI_PROCESSOR_ARM9);
}
ARM_FUNC void OSi_FreeCardBus(void)
{
MIi_SetCardProcessor(MI_PROCESSOR_ARM7);
}
ARM_FUNC u16 OS_ReadOwnerOfLockWord(OSLockWord * lock)
{
return lock->ownerID;
}
ARM_FUNC asm s32 OS_UnLockCartridge(u16 lockID)
{
ldr r1, =OS_UnlockCartridge
bx r1
}
ARM_FUNC asm s32 OS_GetLockID(void)
{
ldr r3, =HW_LOCK_ID_FLAG_MAIN
ldr r1, [r3, #0x0]
clz r2, r1
cmp r2, #0x20
movne r0, #0x40
bne _020CA0D4
add r3, r3, #0x4
ldr r1, [r3, #0x0]
clz r2, r1
cmp r2, #0x20
ldr r0, =0xFFFFFFFD
bxeq lr
mov r0, #0x60
_020CA0D4:
add r0, r0, r2
mov r1, #0x80000000
mov r1, r1, lsr r2
ldr r2, [r3, #0x0]
bic r2, r2, r1
str r2, [r3, #0x0]
bx lr
}
ARM_FUNC asm void OS_ReleaseLockID(register u16 lockID)
{
ldr r3, =HW_LOCK_ID_FLAG_MAIN
cmp r0, #0x60
addpl r3, r3, #0x4
subpl r0, r0, #0x60
submi r0, r0, #0x40
mov r1, #0x80000000
mov r1, r1, lsr r0
ldr r2, [r3, #0x0]
orr r2, r2, r1
str r2, [r3, #0x0]
bx lr
}
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