src/mainboard/emulation/qemu-armv7/mainboard.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2016 Vladimir Serbinenko <phcoder@gmail.com>
 *
 * 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; version 2 or, at your option, any later
 * version of the License.
 *
 * 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.
 */

#include <console/console.h>
#include <device/device.h>
#include <cbmem.h>
#include <string.h>
#include <halt.h>
#include "mainboard.h"
#include <edid.h>

static void init_gfx(void)
{
	volatile uint32_t *pl111;
	struct edid edid;
	/* width is at most 4096 */
	/* height is at most 1024 */
	int width = 800, height = 600;
	uint32_t framebuffer = 0x4c000000;
	pl111 = (uint32_t *) 0x10020000;
	pl111[0] = (width / 4) - 4;
	pl111[1] = height - 1;
	/* registers 2, 3 and 5 are ignored by qemu. Set them correctly if
	   we ever go for real hw.  */
	/* framebuffer adress offset. Has to be in vram.  */
	pl111[4] = framebuffer;
	pl111[7] = 0;
	pl111[10] = 0xff;
	pl111[6] = (5 << 1) | 0x801;

	edid.framebuffer_bits_per_pixel = 32;
	edid.bytes_per_line = width * 4;
	edid.x_resolution = width;
	edid.y_resolution = height;

	set_vbe_mode_info_valid(&edid, framebuffer);
}

static void mainboard_enable(device_t dev)
{
	int discovered;
	if (!dev) {
		printk(BIOS_EMERG, "No dev0; die\n");
		halt();
	}

	discovered = probe_ramsize();
	printk(BIOS_DEBUG, "%d MiB of RAM discovered\n", discovered);
	ram_resource(dev, 0, 0x60000000 >> 10, discovered << 10);
	cbmem_recovery(0);
	init_gfx();
}

struct chip_operations mainboard_ops = {
	.enable_dev = mainboard_enable,
};