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b012bc94 VB |
1 | /* |
2 | * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. | |
3 | * | |
5b8031cc | 4 | * SPDX-License-Identifier: GPL-2.0 |
b012bc94 VB |
5 | */ |
6 | ||
7 | #include <common.h> | |
24b852a7 | 8 | #include <console.h> |
b012bc94 VB |
9 | #ifndef CONFIG_SYS_COREBOOT |
10 | #error This driver requires coreboot | |
11 | #endif | |
12 | ||
13 | #include <asm/arch/sysinfo.h> | |
14 | ||
15 | struct cbmem_console { | |
16 | u32 buffer_size; | |
17 | u32 buffer_cursor; | |
18 | u8 buffer_body[0]; | |
19 | } __attribute__ ((__packed__)); | |
20 | ||
21 | static struct cbmem_console *cbmem_console_p; | |
22 | ||
709ea543 | 23 | void cbmemc_putc(struct stdio_dev *dev, char data) |
b012bc94 VB |
24 | { |
25 | int cursor; | |
26 | ||
27 | cursor = cbmem_console_p->buffer_cursor++; | |
28 | if (cursor < cbmem_console_p->buffer_size) | |
29 | cbmem_console_p->buffer_body[cursor] = data; | |
30 | } | |
31 | ||
709ea543 | 32 | void cbmemc_puts(struct stdio_dev *dev, const char *str) |
b012bc94 VB |
33 | { |
34 | char c; | |
35 | ||
36 | while ((c = *str++) != 0) | |
709ea543 | 37 | cbmemc_putc(dev, c); |
b012bc94 VB |
38 | } |
39 | ||
40 | int cbmemc_init(void) | |
41 | { | |
42 | int rc; | |
43 | struct stdio_dev cons_dev; | |
44 | cbmem_console_p = lib_sysinfo.cbmem_cons; | |
45 | ||
46 | memset(&cons_dev, 0, sizeof(cons_dev)); | |
47 | ||
48 | strcpy(cons_dev.name, "cbmem"); | |
49 | cons_dev.flags = DEV_FLAGS_OUTPUT; /* Output only */ | |
50 | cons_dev.putc = cbmemc_putc; | |
51 | cons_dev.puts = cbmemc_puts; | |
52 | ||
53 | rc = stdio_register(&cons_dev); | |
54 | ||
55 | return (rc == 0) ? 1 : rc; | |
56 | } |