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libpayload: Add support for the CBMEM in memory console.

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Change-Id: I1489b5306ef1ca078686fed4dba2d242f70ad941
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/1727
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Gabe Black
2012-09-29 00:21:27 -07:00
committed by Stefan Reinauer
parent 87abeff334
commit a54b6a6143
6 changed files with 72 additions and 0 deletions
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53
payloads/libpayload/drivers/cbmem_console.c Normal file
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/*
* Copyright (c) 2012 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <libpayload.h>
#include <stdint.h>
struct cbmem_console {
uint32_t size;
uint32_t cursor;
uint8_t body[0];
} __attribute__ ((__packed__));
static struct cbmem_console *cbmem_console_p;
static struct console_output_driver cbmem_console_driver =
{
.putchar = &cbmem_console_putc
};
void cbmem_console_init(void)
{
cbmem_console_p = lib_sysinfo.cbmem_cons;
if (cbmem_console_p)
console_add_output_driver(&cbmem_console_driver);
}
void cbmem_console_putc(unsigned int data)
{
// Bail out if the buffer is full.
if (cbmem_console_p->cursor >= cbmem_console_p->size)
return;
cbmem_console_p->body[cbmem_console_p->cursor++] = data;
}