x86: fsp: Update struct common_buf for FSP spec 1.1

FSP spec 1.1 adds one more member to the struct common_buf to
determine the memory size that can be reserved by FSP below "top
of low usable memory" for bootloader usage. This new member uses
the reserved space so that it is still compatible with previous
FSP spec 1.0.

A new HOB (FSP_HOB_RESOURCE_OWNER_BOOTLOADER_TOLUM_GUID) is also
published when common_buf.tolum_size is valid and non zero.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/x86/include/asm/fsp/fsp_api.h

@@ -43,7 +43,8 @@ struct common_buf {
 	u32	stack_top;
 	u32	boot_mode;	/* Current system boot mode */
 	void	*upd_data;	/* User platform configuraiton data region */
-	u32	reserved[7];	/* Reserved */
+	u32	tolum_size;	/* Top of low usable memory size (FSP 1.1) */
+	u32	reserved[6];	/* Reserved */
 };
 
 enum fsp_phase {

arch/x86/include/asm/fsp/fsp_hob.h

@@ -242,4 +242,12 @@ static inline u16 get_guid_hob_data_size(const struct hob_header *hdr)
 	{ 0x82, 0xb9, 0x56, 0xa5, 0xf3, 0xe6, 0x2a, 0x07 } \
 	}
 
+/* The following GUIDs are newly introduced in FSP spec 1.1 */
+
+#define FSP_HOB_RESOURCE_OWNER_BOOTLOADER_TOLUM_GUID \
+	{ \
+	0x73ff4f56, 0xaa8e, 0x4451, \
+	{ 0xb3, 0x16, 0x36, 0x35, 0x36, 0x67, 0xad, 0x44 } \
+	}
+
 #endif