Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20231227080821.3216113-9-gaosong@loongson.cn>
---
 include/hw/loongarch/boot.h |  4 ++++
 hw/loongarch/boot.c         | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/hw/loongarch/boot.h b/include/hw/loongarch/boot.h
index ce47056608..bbe8c8dd5d 100644
--- a/include/hw/loongarch/boot.h
+++ b/include/hw/loongarch/boot.h
@@ -34,6 +34,10 @@ typedef struct {
         EFI_GUID(0x5568e427, 0x68fc, 0x4f3d,  0xac, 0x74, \
                  0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)
 
+#define DEVICE_TREE_GUID \
+        EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5,  0x83, 0x0b, \
+                 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
+
 struct efi_config_table {
     efi_guid_t guid;
     uint64_t *ptr;
diff --git a/hw/loongarch/boot.c b/hw/loongarch/boot.c
index 6f56d4fd91..fe3e640508 100644
--- a/hw/loongarch/boot.c
+++ b/hw/loongarch/boot.c
@@ -111,6 +111,16 @@ static void init_efi_initrd_table(struct efi_system_table *systab,
     initrd_table->size = initrd_size;
 }
 
+static void init_efi_fdt_table(struct efi_system_table *systab)
+{
+    efi_guid_t tbl_guid = DEVICE_TREE_GUID;
+
+    /* efi_configuration_table 3 */
+    guidcpy(&systab->tables[2].guid, &tbl_guid);
+    systab->tables[2].table = (void *)0x100000; /* fdt_base 1MiB */
+    systab->nr_tables = 3;
+}
+
 static void init_systab(struct loongarch_boot_info *info, void *p, void *start)
 {
     void *bp_tables_start;
@@ -136,6 +146,7 @@ static void init_systab(struct loongarch_boot_info *info, void *p, void *start)
                   sizeof(efi_memory_desc_t) * memmap_entries, 64);
     init_efi_initrd_table(systab, p, start);
     p += ROUND_UP(sizeof(struct efi_initrd), 64);
+    init_efi_fdt_table(systab);
 
     systab->tables = (struct efi_configuration_table *)(bp_tables_start - start);
 }
-- 
2.25.1