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* 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
* 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>
#include <console.h>
#error This driver requires coreboot
#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(struct stdio_dev *dev, 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(struct stdio_dev *dev, const char *str)
char c;
while ((c = *str++) != 0)
cbmemc_putc(dev, 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(, "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;