mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 15:37:23 +00:00
b012bc94ac
This command is useful to allow to observe messages generated by coreboot and u-boot until present. In particular it is handy when u-boot is instrumented to fall through into console mode on startup errors. Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
67 lines
1.6 KiB
C
67 lines
1.6 KiB
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;
|
|
}
|