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>master
parent
98ab435f73
commit
b012bc94ac
@ -0,0 +1,67 @@ |
||||
/*
|
||||
* 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; |
||||
} |
Loading…
Reference in new issue