x86: slimbootloader: Add memory configuration

Slim Bootloader provides memory map info thru its HOB list pointer.
Configure memory size and relocation memory from the HOB data, and
provide e820 entries as well.
- Get memory size from the memory map info HOB
- Set available top memory lower than 4GB for U-Boot relocation
- Provide e820 entries from the memory map info HOB

Signed-off-by: Aiden Park <aiden.park@intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h b/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h
new file mode 100644
index 0000000000..4ee8a0627e
--- /dev/null
+++ b/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019 Intel Corporation <www.intel.com>
+ */
+
+#ifndef __SLIMBOOTLOADER_ARCH_H__
+#define __SLIMBOOTLOADER_ARCH_H__
+
+#include <common.h>
+#include <asm/hob.h>
+
+/**
+ * A GUID to get MemoryMap info hob which is provided by Slim Bootloader
+ */
+#define SBL_MEMORY_MAP_INFO_GUID \
+	EFI_GUID(0xa1ff7424, 0x7a1a, 0x478e, \
+		0xa9, 0xe4, 0x92, 0xf3, 0x57, 0xd1, 0x28, 0x32)
+
+/**
+ * A single entry of memory map information
+ *
+ * @addr: start address of a memory map entry
+ * @size: size of a memory map entry
+ * @type: usable:1, reserved:2, acpi:3, nvs:4, unusable:5
+ * @flag: only used in Slim Bootloader
+ * @rsvd: padding for alignment
+ */
+struct sbl_memory_map_entry {
+	u64	addr;
+	u64	size;
+	u8	type;
+	u8	flag;
+	u8	rsvd[6];
+};
+
+/**
+ * This includes all memory map entries which is sorted based on physical start
+ * address, from low to high, and carved out reserved, acpi nvs, acpi reclaim
+ * and usable memory.
+ *
+ * @rev  : revision of memory_map_info structure. currently 1.
+ * @rsvd : padding for alignment
+ * @count: the number of memory map entries
+ * @entry: array of all memory map entries
+ */
+struct sbl_memory_map_info {
+	u8	rev;
+	u8	rsvd[3];
+	u32	count;
+	struct sbl_memory_map_entry	entry[0];
+};
+
+#endif /* __SLIMBOOTLOADER_ARCH_H__ */