1 files changed, 85 insertions, 0 deletions
diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
new file mode 100644
index 00000000000..8d2ef6deb51
--- /dev/null
+++ b/lib/efi_loader/efi_smbios.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  EFI application tables support
+ *
+ *  Copyright (c) 2016 Alexander Graf
+ */
+
+#define LOG_CATEGORY LOGC_EFI
+
+#include <efi_loader.h>
+#include <log.h>
+#include <malloc.h>
+#include <mapmem.h>
+#include <smbios.h>
+#include <linux/sizes.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+const efi_guid_t smbios3_guid = SMBIOS3_TABLE_GUID;
+
+enum {
+	TABLE_SIZE	= SZ_4K,
+};
+
+/*
+ * Install the SMBIOS table as a configuration table.
+ *
+ * Return:	status code
+ */
+efi_status_t efi_smbios_register(void)
+{
+	ulong addr;
+	efi_status_t ret;
+	void *buf;
+
+	addr = gd_smbios_start();
+	if (!addr) {
+		log_err("No SMBIOS tables to install\n");
+		return EFI_NOT_FOUND;
+	}
+
+	/* Mark space used for tables */
+	ret = efi_add_memory_map(addr, TABLE_SIZE, EFI_RUNTIME_SERVICES_DATA);
+	if (ret)
+		return ret;
+
+	log_debug("EFI using SMBIOS tables at %lx\n", addr);
+
+	/* Install SMBIOS information as configuration table */
+	buf = map_sysmem(addr, 0);
+	ret = efi_install_configuration_table(&smbios3_guid, buf);
+	unmap_sysmem(buf);
+
+	return ret;
+}
+
+static int install_smbios_table(void)
+{
+	ulong addr;
+	void *buf;
+
+	if (!IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLE) ||
+	    IS_ENABLED(CONFIG_X86) ||
+	    IS_ENABLED(CONFIG_QFW_SMBIOS))
+		return 0;
+
+	/* Align the table to a 4KB boundary to keep EFI happy */
+	buf = memalign(SZ_4K, TABLE_SIZE);
+	if (!buf)
+		return log_msg_ret("mem", -ENOMEM);
+
+	addr = map_to_sysmem(buf);
+	if (!write_smbios_table(addr)) {
+		log_err("Failed to write SMBIOS table\n");
+		return log_msg_ret("smbios", -EINVAL);
+	}
+
+	/* Make a note of where we put it */
+	log_debug("SMBIOS tables written to %lx\n", addr);
+	gd->arch.smbios_start = addr;
+
+	return 0;
+}
+EVENT_SPY_SIMPLE(EVT_LAST_STAGE_INIT, install_smbios_table);