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authorAlexander Graf <agraf@suse.de>2016-08-19 01:23:29 +0200
committerAlexander Graf <agraf@suse.de>2016-10-19 09:01:52 +0200
commite663b350f1699312281ddd1439dda6b5fc86598d (patch)
treeed2c0109e34f1dcc66861c8e8d06abb94c27c4aa /lib/efi_loader
parent96476206c54ee9c94e5994d96f52ec9d2063967a (diff)
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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>
Diffstat (limited to 'lib/efi_loader')
-rw-r--r--lib/efi_loader/Makefile1
-rw-r--r--lib/efi_loader/efi_smbios.c32
2 files changed, 33 insertions, 0 deletions
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index 2a3849e..12159dd 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 0000000..ac412e7
--- /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);
+}