GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
21813 changed files with 4413081 additions and 0 deletions
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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/arch/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;
+}