aedrix-kernel/kernel/start_kernel.c

/*
    Copyright (C) 2012, Aaron Lindsay <aaron@aclindsay.com>

    This file is part of Aedrix.

    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 2 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, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <atags.h>
#include <mmu.h>
#include <mm.h>
#include <print.h>
#include <devices/pl011.h>

#include <devices/pl111.h>
#include <framebuffer.h>
#include <console.h>

struct fb myfb;

void video(void) {
	unsigned int x, y;
	pl111_init(&myfb, 24);
	x = 0, y = 0;
	for (y=0; y<480; y++)
		for (x=0; x<640; x++)
			fb_write_pixel(&myfb, x, y, 0x3f, 0x0, 0x6f);

	console_init(&myfb);
}

void test_memory() {
	struct page *p, *q;
	p = mm_get_free_pages(0);
	if (p)
		print("%x, %x\n", p, p->address);
	else
		print("Error: failed to allocate memory for p\n");

	q = mm_get_free_pages(4);
	if (q)
		print("%x, %x\n", q, q->address);
	else
		print("Error: failed to allocate memory for q\n");

	mm_put_free_pages(p);
	mm_put_free_pages(q);

	q = mm_get_free_pages(1);
	if (q)
		print("%x, %x\n", q, q->address);
	else
		print("Error: failed to allocate memory for q\n");

	p = mm_get_free_pages(0);
	if (p)
		print("%x, %x\n", p, p->address);
	else
		print("Error: failed to allocate memory for p\n");

}
 
int main(void) {
	char *lower, *upper;
	struct atag *atags;

	//setup MMU
	mmu_reinit();

	//initialize the serial console
	print_init(&pl011_putc);

	//setup memory
	mm_init();

	if (atags_first_mem_region(&atags)) {
		print("Error: atags must contain at least one memory region\n");
		return -1;
	}

	do {
		lower = (char *)atags->data.mem.start;
		upper = lower + atags->data.mem.size - 1;
		declare_memory_region(lower, upper);
	} while (!atags_next_mem_region(&atags));

	test_memory();

	video();

	return 0;
}