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#include <stdarg.h>
#include <stdio.h>
#include "config.h"
#include "gba/gba.h"
#define AGB_PRINT_FLUSH_ADDR 0x9FE209D
#define AGB_PRINT_STRUCT_ADDR 0x9FE20F8
#define AGB_PRINT_PROTECT_ADDR 0x9FE2FFE
#define WSCNT_DATA (WAITCNT_PHI_OUT_16MHZ | WAITCNT_WS0_S_2 | WAITCNT_WS0_N_4)
// originally for auto no$gba support, the string "no$gba" should be at this address,
// the user needs to read this string out as the memory viewer won't show it.
#define NOCASHGBAIDADDR 0x4FFFA00
#define NOCASHGBAPRINTADDR1 0x4FFFA10 // automatically adds a newline after the string has finished
#define NOCASHGBAPRINTADDR2 0x4FFFA14 // does not automatically add the newline. by default, NOCASHGBAPRINTADDR2 is used. this is used to keep strings consistent between no$gba and VBA-RR, but a user can choose to forgo this.
struct AGBPrintStruct
{
u16 m_nRequest;
u16 m_nBank;
u16 m_nGet;
u16 m_nPut;
};
typedef void (*LPFN_PRINT_FLUSH)(void);
#ifndef NDEBUG
void AGBPrintFlush1Block(void);
void AGBPrintInit(void)
{
struct AGBPrintStruct *pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
u16 *pWSCNT = (u16 *)REG_ADDR_WAITCNT;
u16 *pProtect = (u16 *)AGB_PRINT_PROTECT_ADDR;
u16 nOldWSCNT = *pWSCNT;
*pWSCNT = WSCNT_DATA;
*pProtect = 0x20;
pPrint->m_nRequest = pPrint->m_nGet = pPrint->m_nPut = 0;
pPrint->m_nBank = 0xFD;
*pProtect = 0;
*pWSCNT = nOldWSCNT;
}
static void AGBPutcInternal(const char cChr)
{
volatile struct AGBPrintStruct *pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
u16 *pPrintBuf = (u16 *)(0x8000000 + (pPrint->m_nBank << 16));
u16 *pProtect = (u16 *)AGB_PRINT_PROTECT_ADDR;
u16 nData = pPrintBuf[pPrint->m_nPut / 2];
*pProtect = 0x20;
nData = (pPrint->m_nPut & 1) ? (nData & 0xFF) | (cChr << 8) : (nData & 0xFF00) | cChr;
pPrintBuf[pPrint->m_nPut / 2] = nData;
pPrint->m_nPut++;
*pProtect = 0;
}
void AGBPutc(const char cChr)
{
u16 *pWSCNT = (u16 *)REG_ADDR_WAITCNT;
u16 nOldWSCNT = *pWSCNT;
struct AGBPrintStruct *pPrint;
*pWSCNT = WSCNT_DATA;
AGBPutcInternal(cChr);
*pWSCNT = nOldWSCNT;
pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
if (pPrint->m_nPut == ((pPrint->m_nGet - 1) & 0xFFFF))
AGBPrintFlush1Block();
}
void AGBPrint(const char *pBuf)
{
struct AGBPrintStruct *pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
u16 *pWSCNT = (u16 *)REG_ADDR_WAITCNT;
u16 nOldWSCNT = *pWSCNT;
*pWSCNT = WSCNT_DATA;
while (*pBuf)
{
AGBPutc(*pBuf);
pBuf++;
}
*pWSCNT = nOldWSCNT;
}
void AGBPrintf(const char *pBuf, ...)
{
char bufPrint[0x100];
va_list vArgv;
va_start(vArgv, pBuf);
vsprintf(bufPrint, pBuf, vArgv);
va_end(vArgv);
AGBPrint(bufPrint);
}
static void AGBPrintTransferDataInternal(u32 bAllData)
{
LPFN_PRINT_FLUSH lpfnFuncFlush;
u16 *pIME;
u16 nIME;
u16 *pWSCNT;
u16 nOldWSCNT;
u16 *pProtect;
volatile struct AGBPrintStruct *pPrint;
pProtect = (u16 *)AGB_PRINT_PROTECT_ADDR;
pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
lpfnFuncFlush = (LPFN_PRINT_FLUSH)AGB_PRINT_FLUSH_ADDR;
pIME = (u16 *)REG_ADDR_IME;
nIME = *pIME;
pWSCNT = (u16 *)REG_ADDR_WAITCNT;
nOldWSCNT = *pWSCNT;
*pIME = nIME & ~1;
*pWSCNT = WSCNT_DATA;
if (bAllData)
{
while (pPrint->m_nPut != pPrint->m_nGet)
{
*pProtect = 0x20;
lpfnFuncFlush();
*pProtect = 0;
}
}
else if (pPrint->m_nPut != pPrint->m_nGet)
{
*pProtect = 0x20;
lpfnFuncFlush();
*pProtect = 0;
}
*pWSCNT = nOldWSCNT;
*pIME = nIME;
}
void AGBPrintFlush1Block(void)
{
AGBPrintTransferDataInternal(FALSE);
}
void AGBPrintFlush(void)
{
AGBPrintTransferDataInternal(TRUE);
}
void AGBAssert(const char *pFile, int nLine, const char *pExpression, int nStopProgram)
{
if (nStopProgram)
{
AGBPrintf("ASSERTION FAILED FILE=[%s] LINE=[%d] EXP=[%s] \n", pFile, nLine, pExpression);
AGBPrintFlush();
asm(".hword 0xEFFF");
}
else
{
AGBPrintf("WARING FILE=[%s] LINE=[%d] EXP=[%s] \n", pFile, nLine, pExpression);
}
}
// no$gba print functions, uncomment to use
/*
void NoCashGBAPrint(const char *pBuf)
{
*(volatile u32*)NOCASHGBAPRINTADDR2 = (u32)pBuf;
}
void NoCashGBAPrintf(const char *pBuf, ...)
{
char bufPrint[0x100];
va_list vArgv;
va_start(vArgv, pBuf);
vsprintf(bufPrint, pBuf, vArgv);
va_end(vArgv);
NoCashGBAPrint(bufPrint);
}
*/
#endif
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