efi_loader: provide firmware revision

Provide a firmware revision in the system table using the Makefile
variables VERSION and PATCHLEVEL, e.g. 0x20180700 for v2018.07.

Correct the type of the firmware vendor. It is a u16* pointer.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

include/efi_api.h

@@ -303,7 +303,7 @@ struct efi_configuration_table
 
 struct efi_system_table {
 	struct efi_table_hdr hdr;
-	unsigned long fw_vendor;   /* physical addr of wchar_t vendor string */
+	u16 *fw_vendor;   /* physical addr of wchar_t vendor string */
 	u32 fw_revision;
 	efi_handle_t con_in_handle;
 	struct efi_simple_input_interface *con_in;

lib/efi_loader/Makefile

@@ -6,6 +6,9 @@
 # This file only gets included with CONFIG_EFI_LOADER set, so all
 # object inclusion implicitly depends on it
 
+CFLAGS_efi_boottime.o += \
+  -DFW_VERSION="0x$(VERSION)" \
+  -DFW_PATCHLEVEL="0x$(PATCHLEVEL)"
 CFLAGS_helloworld.o := $(CFLAGS_EFI) -Os -ffreestanding
 CFLAGS_REMOVE_helloworld.o := $(CFLAGS_NON_EFI) -Os
 

lib/efi_loader/efi_boottime.c

@@ -3110,7 +3110,7 @@ static const struct efi_boot_services efi_boot_services = {
 	.create_event_ex = efi_create_event_ex,
 };
 
-static uint16_t __efi_runtime_data firmware_vendor[] = L"Das U-Boot";
+static u16 __efi_runtime_data firmware_vendor[] = L"Das U-Boot";
 
 struct efi_system_table __efi_runtime_data systab = {
 	.hdr = {
@@ -3118,7 +3118,8 @@ struct efi_system_table __efi_runtime_data systab = {
 		.revision = EFI_SPECIFICATION_VERSION,
 		.headersize = sizeof(struct efi_system_table),
 	},
-	.fw_vendor = (long)firmware_vendor,
+	.fw_vendor = firmware_vendor,
+	.fw_revision = FW_VERSION << 16 | FW_PATCHLEVEL << 8,
 	.con_in = (void *)&efi_con_in,
 	.con_out = (void *)&efi_con_out,
 	.std_err = (void *)&efi_con_out,