1 files changed, 107 insertions, 0 deletions
diff --git a/roms/u-boot/arch/x86/include/asm/mrccache.h b/roms/u-boot/arch/x86/include/asm/mrccache.h
new file mode 100644
index 000000000..8b104a2f0
--- /dev/null
+++ b/roms/u-boot/arch/x86/include/asm/mrccache.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2014 Google, Inc
+ * Copyright (C) 2015 Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#ifndef _ASM_MRCCACHE_H
+#define _ASM_MRCCACHE_H
+
+#include <compiler.h>
+
+#define MRC_DATA_ALIGN		0x100
+#define MRC_DATA_SIGNATURE	(('M' << 0) | ('R' << 8) | \
+				 ('C' << 16) | ('D'<<24))
+
+#define MRC_DATA_HEADER_SIZE	32
+
+struct __packed mrc_data_container {
+	u32	signature;	/* "MRCD" */
+	u32	data_size;	/* Size of the 'data' field */
+	u32	checksum;	/* IP style checksum */
+	u32	reserved;	/* For header alignment */
+	u8	data[0];	/* Variable size, platform/run time dependent */
+};
+
+struct mrc_region {
+	u32	base;
+	u32	offset;
+	u32	length;
+};
+
+/* Types of MRC data */
+enum mrc_type_t {
+	MRC_TYPE_NORMAL,
+	MRC_TYPE_VAR,
+
+	MRC_TYPE_COUNT,
+};
+
+struct udevice;
+
+/**
+ * mrccache_find_current() - find the latest MRC cache record
+ *
+ * This searches the MRC cache region looking for the latest record to use
+ * for setting up SDRAM
+ *
+ * @entry:	Position and size of MRC cache in SPI flash
+ * @return pointer to latest record, or NULL if none
+ */
+struct mrc_data_container *mrccache_find_current(struct mrc_region *entry);
+
+/**
+ * mrccache_reserve() - reserve MRC data on the stack
+ *
+ * This copies MRC data pointed by gd->arch.mrc_output to a new place on the
+ * stack with length gd->arch.mrc_output_len, and updates gd->arch.mrc_output
+ * to point to the new place once the migration is done.
+ *
+ * This routine should be called by reserve_arch() before U-Boot is relocated
+ * when MRC cache is enabled.
+ *
+ * @return 0 always
+ */
+int mrccache_reserve(void);
+
+/**
+ * mrccache_get_region() - get MRC region on the SPI flash
+ *
+ * This gets MRC region whose offset and size are described in the device tree
+ * as a subnode to the SPI flash. This tries to find the SPI flash device
+ * (without probing it), falling back to looking for the devicetree node if
+ * driver model is not inited or the SPI flash is not found.
+ *
+ * @type:	Type of MRC data to use
+ * @devp:	Returns pointer to the SPI flash device, if found
+ * @entry:	Position and size of MRC cache in SPI flash
+ * @return 0 if success, -ENOENT if SPI flash node does not exist in the
+ * device tree, -EPERM if MRC region subnode does not exist in the device
+ * tree, -EINVAL if MRC region properties format is incorrect, other error
+ * if SPI flash probe failed.
+ */
+int mrccache_get_region(enum mrc_type_t type, struct udevice **devp,
+			struct mrc_region *entry);
+
+/**
+ * mrccache_save() - save MRC data to the SPI flash
+ *
+ * This saves MRC data stored previously by gd->arch.mrc_output to a proper
+ * place within the MRC region on the SPI flash.
+ *
+ * @return 0 if saved to SPI flash successfully, other error if failed
+ */
+int mrccache_save(void);
+
+/**
+ * mrccache_spl_save() - Save to the MRC region from SPL
+ *
+ * When SPL is used to set up the memory controller we want to save the MRC
+ * data in SPL to avoid needing to pass it up to U-Boot proper to save. This
+ * function handles that.
+ *
+ * @return 0 if saved to SPI flash successfully, other error if failed
+ */
+int mrccache_spl_save(void);
+
+#endif /* _ASM_MRCCACHE_H */