/*
 *	Copyright (c) 2024 Scott Duensing, scott@kangaroopunch.com
 *
 *	Permission is hereby granted, free of charge, to any person obtaining a copy
 *	of this software and associated documentation files (the "Software"), to deal
 *	in the Software without restriction, including without limitation the rights
 *	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *	copies of the Software, and to permit persons to whom the Software is
 *	furnished to do so, subject to the following conditions:
 *
 *	The above copyright notice and this permission notice shall be included in
 *	all copies or substantial portions of the Software.
 *
 *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *	SOFTWARE.
 */


#ifndef WITHOUT_DMA


#ifndef F256LIB_AMALGAMATED_BUILD
#include "f_dma.h"
#endif


//static void dmaWait(void);


void dmaFill(uint32_t start, uint32_t length, byte value) {
	while (PEEKW(RAST_ROW_L) != 482); // Wait for VBL.

	POKE(DMA_CTRL, DMA_CTRL_FILL | DMA_CTRL_ENABLE);
	POKE(DMA_FILL_VAL, value);
	POKEA(DMA_DST_ADDR, start);
	POKEA(DMA_COUNT, length);
	POKE(DMA_CTRL, PEEK(DMA_CTRL) | DMA_CTRL_START);

//	dmaWait();
}



void dma2dFill(uint32_t start, uint16_t width, uint16_t height, uint16_t stride, byte value) {
	while (PEEKW(RAST_ROW_L) != 482); // Wait for VBL.

	asm("sei");
	POKE(DMA_CTRL, DMA_CTRL_2D | DMA_CTRL_FILL | DMA_CTRL_ENABLE);
	POKE(DMA_FILL_VAL, value);
	POKEA(DMA_DST_ADDR, start);
	POKEW(DMA_WIDTH, width);
	POKEW(DMA_HEIGHT, height);
	POKEW(DMA_STRIDE_DST, stride);
	POKE(DMA_CTRL, PEEK(DMA_CTRL) | DMA_CTRL_START);
	asm("nop");
	asm("nop");
	asm("nop");
	asm("nop");
	asm("nop");
	asm("nop");
	asm("cli");

//	dmaWait();
}


/*
static void dmaWait(void) {

	// ***FIX*** This whole block seems unneeded if DMA halts the CPU while it transfers.

	// First, wait for DMA to be complete.
	while (PEEK(DMA_STATUS) & DMA_STAT_BUSY)
		// Spin our wheels.
		;

	POKE(DMA_CTRL, 0);

	// Then wait for a VBL because two DMAs per frame will crash.
	//graphicsWaitVerticalBlank();
}
*/


#endif