[people/ms/u-boot.git] / drivers / misc / cbmem_console.c

/*
 * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
 *
 * 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 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.
 *
 * 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 St, Fifth Floor, Boston, MA, 02110-1301 USA
 */

#include <common.h>

#ifndef CONFIG_SYS_COREBOOT
#error This driver requires coreboot
#endif

#include <asm/arch/sysinfo.h>

struct cbmem_console {
	u32 buffer_size;
	u32 buffer_cursor;
	u8  buffer_body[0];
}  __attribute__ ((__packed__));

static struct cbmem_console *cbmem_console_p;

void cbmemc_putc(char data)
{
	int cursor;

	cursor = cbmem_console_p->buffer_cursor++;
	if (cursor < cbmem_console_p->buffer_size)
		cbmem_console_p->buffer_body[cursor] = data;
}

void cbmemc_puts(const char *str)
{
	char c;

	while ((c = *str++) != 0)
		cbmemc_putc(c);
}

int cbmemc_init(void)
{
	int rc;
	struct stdio_dev cons_dev;
	cbmem_console_p = lib_sysinfo.cbmem_cons;

	memset(&cons_dev, 0, sizeof(cons_dev));

	strcpy(cons_dev.name, "cbmem");
	cons_dev.flags = DEV_FLAGS_OUTPUT; /* Output only */
	cons_dev.putc  = cbmemc_putc;
	cons_dev.puts  = cbmemc_puts;

	rc = stdio_register(&cons_dev);

	return (rc == 0) ? 1 : rc;
}
Commit	Line	Data
b012bc94 VB	1	/*
	2	* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; version 2 of the License.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program; if not, write to the Free Software
	15	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
	16	*/
	17
	18	#include <common.h>
	19
	20	#ifndef CONFIG_SYS_COREBOOT
	21	#error This driver requires coreboot
	22	#endif
	23
	24	#include <asm/arch/sysinfo.h>
	25
	26	struct cbmem_console {
	27	u32 buffer_size;
	28	u32 buffer_cursor;
	29	u8 buffer_body[0];
	30	} __attribute__ ((__packed__));
	31
	32	static struct cbmem_console *cbmem_console_p;
	33
	34	void cbmemc_putc(char data)
	35	{
	36	int cursor;
	37
	38	cursor = cbmem_console_p->buffer_cursor++;
	39	if (cursor < cbmem_console_p->buffer_size)
	40	cbmem_console_p->buffer_body[cursor] = data;
	41	}
	42
	43	void cbmemc_puts(const char *str)
	44	{
	45	char c;
	46
	47	while ((c = *str++) != 0)
	48	cbmemc_putc(c);
	49	}
	50
	51	int cbmemc_init(void)
	52	{
	53	int rc;
	54	struct stdio_dev cons_dev;
	55	cbmem_console_p = lib_sysinfo.cbmem_cons;
	56
	57	memset(&cons_dev, 0, sizeof(cons_dev));
	58
	59	strcpy(cons_dev.name, "cbmem");
	60	cons_dev.flags = DEV_FLAGS_OUTPUT; /* Output only */
	61	cons_dev.putc = cbmemc_putc;
	62	cons_dev.puts = cbmemc_puts;
	63
	64	rc = stdio_register(&cons_dev);
65
66	return (rc == 0) ? 1 : rc;
67	}