57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
/*
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* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <common.h>
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#include <console.h>
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#ifndef CONFIG_SYS_COREBOOT
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#error This driver requires coreboot
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#endif
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#include <asm/arch/sysinfo.h>
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struct cbmem_console {
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u32 buffer_size;
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u32 buffer_cursor;
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u8 buffer_body[0];
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} __attribute__ ((__packed__));
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static struct cbmem_console *cbmem_console_p;
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void cbmemc_putc(struct stdio_dev *dev, char data)
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{
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int cursor;
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cursor = cbmem_console_p->buffer_cursor++;
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if (cursor < cbmem_console_p->buffer_size)
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cbmem_console_p->buffer_body[cursor] = data;
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}
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void cbmemc_puts(struct stdio_dev *dev, const char *str)
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{
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char c;
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while ((c = *str++) != 0)
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cbmemc_putc(dev, c);
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}
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int cbmemc_init(void)
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{
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int rc;
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struct stdio_dev cons_dev;
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cbmem_console_p = lib_sysinfo.cbmem_cons;
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memset(&cons_dev, 0, sizeof(cons_dev));
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strcpy(cons_dev.name, "cbmem");
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cons_dev.flags = DEV_FLAGS_OUTPUT; /* Output only */
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cons_dev.putc = cbmemc_putc;
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cons_dev.puts = cbmemc_puts;
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rc = stdio_register(&cons_dev);
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return (rc == 0) ? 1 : rc;
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}
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