- Added a function to get a GUID HOB data pointer from hob_list
Signed-off-by: Aiden Park <[email protected]>
---
arch/x86/cpu/slimbootloader/Makefile | 2 +-
arch/x86/cpu/slimbootloader/hob.c | 97 +++++++++++++++++++
.../asm/arch-slimbootloader/slimbootloader.h | 14 +++
3 files changed, 112 insertions(+), 1 deletion(-)
create mode 100644 arch/x86/cpu/slimbootloader/hob.c
diff --git a/arch/x86/cpu/slimbootloader/Makefile
b/arch/x86/cpu/slimbootloader/Makefile
index 627a721e8c..620fc8a139 100644
--- a/arch/x86/cpu/slimbootloader/Makefile
+++ b/arch/x86/cpu/slimbootloader/Makefile
@@ -2,4 +2,4 @@
#
# Copyright (C) 2019 Intel Corporation <www.intel.com>
-obj-y += car.o slimbootloader.o
+obj-y += car.o slimbootloader.o hob.o
diff --git a/arch/x86/cpu/slimbootloader/hob.c
b/arch/x86/cpu/slimbootloader/hob.c
new file mode 100644
index 0000000000..dff86b696e
--- /dev/null
+++ b/arch/x86/cpu/slimbootloader/hob.c
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Intel Corporation <www.intel.com>
+ */
+
+#include <common.h>
+#include <asm/arch/slimbootloader.h>
+
+/*
+ * This compares two guids and returns its result(0 or others).
+ *
+ * @guid1: A pointer to a 128 bit guid
+ * @guid2: A pointer to a 128 bit guid
+ *
+ * @return: 0 if guid1 and guid2 are identical. Otherwise it returns none 0.
+ */
+static int compare_guid(const struct efi_guid *guid1,
+ const struct efi_guid *guid2)
+{
+ return memcmp(guid1, guid2, sizeof(struct efi_guid));
+}
+
+/**
+ * This returns a hob header pointer which has a specific type from the given
+ * hob list.
+ *
+ * @type: A specific hob type
+ * @hob_list: A pointer to a hob list
+ *
+ * @return: A hob header pointer if the specified type is found.
+ * Otherwise, this returns NULL.
+ */
+static const struct hob_header *get_next_hob_from_hdr(uint type,
+ const void *hob_list)
+{
+ const struct hob_header *hdr;
+
+ hdr = hob_list;
+
+ /* Parse the HOB list until end of list or matching type is found */
+ while (!end_of_hob(hdr)) {
+ if (hdr->type == type)
+ return hdr;
+
+ hdr = get_next_hob(hdr);
+ }
+
+ return NULL;
+}
+
+/**
+ * This returns a hob header pointer which has a specific guid from the given
+ * hob list.
+ *
+ * @guid: A pointer to a 128 bit guid
+ * @hob_list: A pointer to a hob list
+ *
+ * @return: A hob header pointer if the specified guid hob entry is found.
+ * Otherwise, this returns NULL.
+ */
+static const struct hob_header *get_next_guid_hob(const struct efi_guid *guid,
+ const void *hob_list)
+{
+ const struct hob_header *hdr;
+ struct hob_guid *guid_hob;
+
+ hdr = hob_list;
+ while ((hdr = get_next_hob_from_hdr(HOB_TYPE_GUID_EXT, hdr))) {
+ guid_hob = (struct hob_guid *)hdr;
+ if (!compare_guid(guid, &guid_hob->name))
+ break;
+ hdr = get_next_hob(hdr);
+ }
+
+ return hdr;
+}
+
+/**
+ * This returns a pointer to hob data buffer if the given guid hob is found.
+ *
+ * @guid: A pointer to a 128 bit guid
+ * @hob_list: A pointer to a hob list
+ *
+ * @return: A pointer to hob data buffer if the specified guid hob entry is
+ * found. Otherwise, this returns NULL.
+ */
+void *get_next_guid_hob_data(const struct efi_guid *guid,
+ const void *hob_list)
+{
+ const struct hob_header *guid_hob;
+
+ guid_hob = get_next_guid_hob(guid, hob_list);
+ if (!guid_hob)
+ return NULL;
+
+ return get_guid_hob_data(guid_hob);
+}
diff --git a/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h
b/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h
index 7309a83724..bd1f4ee374 100644
--- a/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h
+++ b/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h
@@ -7,5 +7,19 @@
#define __SLIMBOOTLOADER_ARCH_H__
#include <common.h>
+#include <asm/fsp/fsp_types.h>
+#include <asm/fsp/fsp_hob.h>
+
+/**
+ * This returns a pointer to hob data buffer if the given guid hob is found.
+ *
+ * @guid: A pointer to a 128 bit guid
+ * @hob_list: A pointer to a hob list
+ *
+ * @return: A pointer to hob data buffer if the specified guid hob entry is
+ * found. Otherwise, this returns NULL.
+ */
+void *get_next_guid_hob_data(const struct efi_guid *guid,
+ const void *hob_list);
#endif
--
2.20.1
_______________________________________________
U-Boot mailing list
[email protected]
https://lists.denx.de/listinfo/u-boot
