/*  V2MemTest - A CLI Tool to test & fix Voodoo² TMU System
*   Copyright (C) 2026  ChaCha
*
*   This program is free software: you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation, either version 3 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

#define _BSD_SOURCE 1
#include <stdint.h>
#include <stdio.h> 
#include <string.h> 
#include <time.h> 
#include <unistd.h> 

#include "cvg.h" 
#include <glide.h>
#include "sst1init.h"
#include "fxpci.h"
#include "Draw.h"

#include "Test_Common.h"

#define _DEF_PREHEAT_TIME_S 5
#define _DEF_PREHEAT_NB_PIXEL_ROW 256
#define _DEF_PREHEAT_NB_PIXEL_COL 256

void
HeatMemAndTMU(	sst1DeviceInfoStruct * const devInfo,
				FxU32 * const sst,
				SstRegs * const sstregs,
				const char ucNumTMU,
				const FxU32 mem)
{
	/* set downstream TMUs to passthrough */
	for (int i=0; i<ucNumTMU; i++)
		ISET(SST_TREX(sstregs,i)->textureMode, SST_TC_PASS | SST_TCA_PASS);
		
	/* Setting texture base address window for both CPU and TMU
	*/
	ISET(sstregs->texBaseAddr, (mem>>3));
	
	/* Setting texture base address (to access it from CPU).
	* We wont draw anything bigger than the texture so we can just use LOD0
	* regardless of the actual size of the texture. And here its the maximum
	* size (=LOD0) anyway.
	*/
	volatile FxU32 *texRowAddr
			= (ucNumTMU<<(21-2)) 
			+ (((FxU32)0)<<(17-2)) /*LOD0*/
			+ (FxU32 *)SST_TEX_ADDRESS(sst);
	
	for(unsigned short iter_row = 0; iter_row < _DEF_PREHEAT_NB_PIXEL_ROW; iter_row++)
	{
		for(unsigned short iter_col = 0; iter_col < _DEF_PREHEAT_NB_PIXEL_COL; iter_col+=2)
		{
			ISET(texRowAddr[iter_col/2], 0x55AA);
		}
		/* move to next line */
		texRowAddr += (1<<(9-2));
	}
	
	clock_t begin = clock();
	do
	{
		if(((sst1InitReturnStatus(sst) & SST_FIFOLEVEL)) >= 0x20)
		{
			/* draw a 256x256 square */
			drawSquare(sstregs, ucNumTMU, 0, 0, 256);
		}
	}
	while(((double)(clock() - begin)/CLOCKS_PER_SEC) < _DEF_PREHEAT_TIME_S );
	
	sst1InitIdle(sst);
}