]>
Commit | Line | Data |
---|---|---|
83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
b012bc94 VB |
2 | /* |
3 | * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. | |
b012bc94 VB |
4 | */ |
5 | ||
6 | #include <common.h> | |
24b852a7 | 7 | #include <console.h> |
b012bc94 VB |
8 | #ifndef CONFIG_SYS_COREBOOT |
9 | #error This driver requires coreboot | |
10 | #endif | |
11 | ||
12 | #include <asm/arch/sysinfo.h> | |
13 | ||
14 | struct cbmem_console { | |
15 | u32 buffer_size; | |
16 | u32 buffer_cursor; | |
17 | u8 buffer_body[0]; | |
18 | } __attribute__ ((__packed__)); | |
19 | ||
20 | static struct cbmem_console *cbmem_console_p; | |
21 | ||
709ea543 | 22 | void cbmemc_putc(struct stdio_dev *dev, char data) |
b012bc94 VB |
23 | { |
24 | int cursor; | |
25 | ||
26 | cursor = cbmem_console_p->buffer_cursor++; | |
27 | if (cursor < cbmem_console_p->buffer_size) | |
28 | cbmem_console_p->buffer_body[cursor] = data; | |
29 | } | |
30 | ||
709ea543 | 31 | void cbmemc_puts(struct stdio_dev *dev, const char *str) |
b012bc94 VB |
32 | { |
33 | char c; | |
34 | ||
35 | while ((c = *str++) != 0) | |
709ea543 | 36 | cbmemc_putc(dev, c); |
b012bc94 VB |
37 | } |
38 | ||
39 | int cbmemc_init(void) | |
40 | { | |
41 | int rc; | |
42 | struct stdio_dev cons_dev; | |
43 | cbmem_console_p = lib_sysinfo.cbmem_cons; | |
44 | ||
45 | memset(&cons_dev, 0, sizeof(cons_dev)); | |
46 | ||
47 | strcpy(cons_dev.name, "cbmem"); | |
48 | cons_dev.flags = DEV_FLAGS_OUTPUT; /* Output only */ | |
49 | cons_dev.putc = cbmemc_putc; | |
50 | cons_dev.puts = cbmemc_puts; | |
51 | ||
52 | rc = stdio_register(&cons_dev); | |
53 | ||
54 | return (rc == 0) ? 1 : rc; | |
55 | } |