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