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

source/bootloader/u-boot-2020.01/arch/x86/lib/fsp1/fsp_dram.c

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <common.h>
+#include <asm/fsp/fsp_support.h>
+
+int dram_init(void)
+{
+	int ret;
+
+	/* The FSP has already set up DRAM, so grab the info we need */
+	ret = fsp_scan_for_ram_size();
+	if (ret)
+		return ret;
+
+	if (IS_ENABLED(CONFIG_ENABLE_MRC_CACHE))
+		gd->arch.mrc_output = fsp_get_nvs_data(gd->arch.hob_list,
+					       &gd->arch.mrc_output_len);
+
+	return 0;
+}
+
+/*
+ * This function looks for the highest region of memory lower than 4GB which
+ * has enough space for U-Boot where U-Boot is aligned on a page boundary.
+ * It overrides the default implementation found elsewhere which simply
+ * picks the end of ram, wherever that may be. The location of the stack,
+ * the relocation address, and how far U-Boot is moved by relocation are
+ * set in the global data structure.
+ */
+ulong board_get_usable_ram_top(ulong total_size)
+{
+	return fsp_get_usable_lowmem_top(gd->arch.hob_list);
+}