smbios: Expose in efi_loader as table

We can pass SMBIOS easily as EFI configuration table to an EFI payload. This
patch adds enablement for that case.

While at it, we also enable SMBIOS generation for ARM systems, since they support
EFI_LOADER.

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

8 files changed, 51 insertions, 2 deletions

diff --git a/cmd/bootefi.c b/cmd/bootefi.c
index 38c3b419f2..aa5a01e3a6 100644
--- a/cmd/bootefi.c
+++ b/cmd/bootefi.c
@@ -205,6 +205,9 @@ static unsigned long do_bootefi_exec(void *efi, void *fdt)
 	if (!memcmp(bootefi_device_path[0].str, "N\0e\0t", 6))
 		loaded_image_info.device_handle = nethandle;
 #endif
+#ifdef CONFIG_GENERATE_SMBIOS_TABLE
+	efi_smbios_register();
+#endif
 
 	/* Initialize EFI runtime services */
 	efi_reset_system_init();
diff --git a/include/efi_api.h b/include/efi_api.h
index f572b88079..bdb600e08d 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -201,6 +201,10 @@ struct efi_runtime_services {
 	EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, \
 		 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
 
+#define SMBIOS_TABLE_GUID \
+	EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3,  \
+		 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
+
 struct efi_configuration_table
 {
 	efi_guid_t guid;
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 56b2b4719a..1bc3b3357c 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -85,6 +85,8 @@ int efi_disk_register(void);
 int efi_gop_register(void);
 /* Called by bootefi to make the network interface available */
 int efi_net_register(void **handle);
+/* Called by bootefi to make SMBIOS tables available */
+void efi_smbios_register(void);
 
 /* Called by networking code to memorize the dhcp ack package */
 void efi_net_set_dhcp_ack(void *pkt, int len);
diff --git a/include/smbios.h b/include/smbios.h
index 3cbc687604..d582d4f7ab 100644
--- a/include/smbios.h
+++ b/include/smbios.h
@@ -55,6 +55,7 @@ struct __packed smbios_entry {
 #define BIOS_CHARACTERISTICS_SELECTABLE_BOOT	(1 << 16)
 
 #define BIOS_CHARACTERISTICS_EXT1_ACPI		(1 << 0)
+#define BIOS_CHARACTERISTICS_EXT1_UEFI		(1 << 3)
 #define BIOS_CHARACTERISTICS_EXT2_TARGET	(1 << 2)
 
 struct __packed smbios_type0 {
diff --git a/lib/Kconfig b/lib/Kconfig
index 4c098c064e..b16062fbe3 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -164,12 +164,12 @@ config FDT_FIXUP_PARTITIONS
 	  variable.
 
 menu "System tables"
-	depends on !EFI && !SYS_COREBOOT
+	depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
 
 config GENERATE_SMBIOS_TABLE
 	bool "Generate an SMBIOS (System Management BIOS) table"
 	default y
-	depends on X86
+	depends on X86 || EFI_LOADER
 	help
 	  The System Management BIOS (SMBIOS) specification addresses how
 	  motherboard and system vendors present management information about
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index 2a3849e31b..12159dd5ce 100644
--- a/lib/efi_loader/Makefile
+++ b/lib/efi_loader/Makefile
@@ -12,3 +12,4 @@ obj-y += efi_memory.o
 obj-$(CONFIG_LCD) += efi_gop.o
 obj-$(CONFIG_PARTITIONS) += efi_disk.o
 obj-$(CONFIG_NET) += efi_net.o
+obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += efi_smbios.o
diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
new file mode 100644
index 0000000000..ac412e7362
--- /dev/null
+++ b/lib/efi_loader/efi_smbios.c
@@ -0,0 +1,32 @@
+/*
+ *  EFI application tables support
+ *
+ *  Copyright (c) 2016 Alexander Graf
+ *
+ *  SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <efi_loader.h>
+#include <inttypes.h>
+#include <smbios.h>
+
+static const efi_guid_t smbios_guid = SMBIOS_TABLE_GUID;
+
+void efi_smbios_register(void)
+{
+	/* Map within the low 32 bits, to allow for 32bit SMBIOS tables */
+	uint64_t dmi = 0xffffffff;
+	/* Reserve 4kb for SMBIOS */
+	uint64_t pages = 1;
+	int memtype = EFI_RUNTIME_SERVICES_DATA;
+
+	if (efi_allocate_pages(1, memtype, pages, &dmi) != EFI_SUCCESS)
+		return;
+
+	/* Generate SMBIOS tables */
+	write_smbios_table(dmi);
+
+	/* And expose them to our EFI payload */
+	efi_install_configuration_table(&smbios_guid, (void*)(uintptr_t)dmi);
+}
diff --git a/lib/smbios.c b/lib/smbios.c
index 09a90cae83..237f5f05fd 100644
--- a/lib/smbios.c
+++ b/lib/smbios.c
@@ -83,14 +83,20 @@ static int smbios_write_type0(uintptr_t *current, int handle)
 	t->vendor = smbios_add_string(t->eos, "U-Boot");
 	t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION);
 	t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE);
+#ifdef CONFIG_ROM_SIZE
 	t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
+#endif
 	t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
 				  BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
 				  BIOS_CHARACTERISTICS_UPGRADEABLE;
 #ifdef CONFIG_GENERATE_ACPI_TABLE
 	t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
 #endif
+#ifdef CONFIG_EFI_LOADER
+	t->bios_characteristics_ext1 |= BIOS_CHARACTERISTICS_EXT1_UEFI;
+#endif
 	t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
+
 	t->bios_major_release = 0xff;
 	t->bios_minor_release = 0xff;
 	t->ec_major_release = 0xff;