Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 1 | /* |
Stefan Reinauer | c9f35f5 | 2013-02-19 16:55:51 -0800 | [diff] [blame] | 2 | * This file is part of the libpayload project. |
Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 3 | * |
Stefan Reinauer | c9f35f5 | 2013-02-19 16:55:51 -0800 | [diff] [blame] | 4 | * Copyright (c) 2012 Google Inc. |
Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 5 | * |
Stefan Reinauer | c9f35f5 | 2013-02-19 16:55:51 -0800 | [diff] [blame] | 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 16 | * |
Stefan Reinauer | c9f35f5 | 2013-02-19 16:55:51 -0800 | [diff] [blame] | 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 28 | */ |
| 29 | |
| 30 | #include <libpayload.h> |
| 31 | #include <stdint.h> |
| 32 | |
| 33 | struct cbmem_console { |
| 34 | uint32_t size; |
| 35 | uint32_t cursor; |
| 36 | uint8_t body[0]; |
| 37 | } __attribute__ ((__packed__)); |
| 38 | |
| 39 | static struct cbmem_console *cbmem_console_p; |
| 40 | |
| 41 | static struct console_output_driver cbmem_console_driver = |
| 42 | { |
Julius Werner | 2fe505b | 2014-04-17 20:00:20 -0700 | [diff] [blame] | 43 | .write = &cbmem_console_write, |
Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 44 | }; |
| 45 | |
| 46 | void cbmem_console_init(void) |
| 47 | { |
| 48 | cbmem_console_p = lib_sysinfo.cbmem_cons; |
| 49 | if (cbmem_console_p) |
| 50 | console_add_output_driver(&cbmem_console_driver); |
| 51 | } |
| 52 | |
Julius Werner | 2fe505b | 2014-04-17 20:00:20 -0700 | [diff] [blame] | 53 | void cbmem_console_write(const void *buffer, size_t count) |
Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 54 | { |
Julius Werner | 2fe505b | 2014-04-17 20:00:20 -0700 | [diff] [blame] | 55 | if (cbmem_console_p->cursor + count >= cbmem_console_p->size) |
Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 56 | return; |
| 57 | |
Julius Werner | 2fe505b | 2014-04-17 20:00:20 -0700 | [diff] [blame] | 58 | memcpy(cbmem_console_p->body + cbmem_console_p->cursor, buffer, count); |
| 59 | cbmem_console_p->cursor += count; |
Gabe Black | a54b6a6 | 2012-09-29 00:21:27 -0700 | [diff] [blame] | 60 | } |