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authorBin Meng <bmeng.cn@gmail.com>2014-12-30 16:02:05 +0800
committerSimon Glass <sjg@chromium.org>2015-01-12 17:03:41 -0800
commit949dbc12db8ba628004ac70359ca0e0edf98432e (patch)
tree1557be2bed61a765a125fab614f74ebdf4afc978 /arch/x86/include/asm/arch-queensbay
parent8f9052fd98e2e97e33b0e5ccf57f028e595abb5d (diff)
x86: Simplify the fsp hob access functions
Remove the troublesome union hob_pointers so that some annoying casts are no longer needed in those hob access routines. This also improves the readability. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/include/asm/arch-queensbay')
-rw-r--r--arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h46
-rw-r--r--arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h5
2 files changed, 21 insertions, 30 deletions
diff --git a/arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h b/arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h
index 380b64efaa..51103617b0 100644
--- a/arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h
+++ b/arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h
@@ -182,15 +182,6 @@ struct hob_guid {
/* GUID specific data goes here */
};
-/* Union of all the possible HOB Types */
-union hob_pointers {
- struct hob_header *hdr;
- struct hob_mem_alloc *mem_alloc;
- struct hob_res_desc *res_desc;
- struct hob_guid *guid;
- u8 *raw;
-};
-
/**
* get_hob_type() - return the type of a HOB
*
@@ -201,9 +192,9 @@ union hob_pointers {
*
* @return: HOB type.
*/
-static inline u16 get_hob_type(union hob_pointers hob)
+static inline u16 get_hob_type(const struct hob_header *hdr)
{
- return hob.hdr->type;
+ return hdr->type;
}
/**
@@ -216,9 +207,9 @@ static inline u16 get_hob_type(union hob_pointers hob)
*
* @return: HOB length.
*/
-static inline u16 get_hob_length(union hob_pointers hob)
+static inline u16 get_hob_length(const struct hob_header *hdr)
{
- return hob.hdr->len;
+ return hdr->len;
}
/**
@@ -227,13 +218,13 @@ static inline u16 get_hob_length(union hob_pointers hob)
* This macro returns a pointer to HOB that follows the HOB specified by hob
* in the HOB List.
*
- * @hob: A pointer to a HOB.
+ * @hdr: A pointer to a HOB.
*
* @return: A pointer to the next HOB in the HOB list.
*/
-static inline void *get_next_hob(union hob_pointers hob)
+static inline const struct hob_header *get_next_hob(const struct hob_header *hdr)
{
- return (void *)(*(u8 **)&(hob) + get_hob_length(hob));
+ return (const struct hob_header *)((u32)hdr + get_hob_length(hdr));
}
/**
@@ -243,14 +234,14 @@ static inline void *get_next_hob(union hob_pointers hob)
* HOB list. If hob is last HOB in the HOB list, then true is returned.
* Otherwise, false is returned.
*
- * @hob: A pointer to a HOB.
+ * @hdr: A pointer to a HOB.
*
- * @retval true: The HOB specified by hob is the last HOB in the HOB list.
- * @retval false: The HOB specified by hob is not the last HOB in the HOB list.
+ * @retval true: The HOB specified by hdr is the last HOB in the HOB list.
+ * @retval false: The HOB specified by hdr is not the last HOB in the HOB list.
*/
-static inline bool end_of_hob(union hob_pointers hob)
+static inline bool end_of_hob(const struct hob_header *hdr)
{
- return get_hob_type(hob) == HOB_TYPE_EOH;
+ return get_hob_type(hdr) == HOB_TYPE_EOH;
}
/**
@@ -260,13 +251,13 @@ static inline bool end_of_hob(union hob_pointers hob)
* This macro returns a pointer to the data buffer in a HOB specified by hob.
* hob is assumed to be a HOB of type HOB_TYPE_GUID_EXT.
*
- * @hob: A pointer to a HOB.
+ * @hdr: A pointer to a HOB.
*
* @return: A pointer to the data buffer in a HOB.
*/
-static inline void *get_guid_hob_data(u8 *hob)
+static inline void *get_guid_hob_data(const struct hob_header *hdr)
{
- return (void *)(hob + sizeof(struct hob_guid));
+ return (void *)((u32)hdr + sizeof(struct hob_guid));
}
/**
@@ -276,14 +267,13 @@ static inline void *get_guid_hob_data(u8 *hob)
* This macro returns the size, in bytes, of the data buffer in a HOB
* specified by hob. hob is assumed to be a HOB of type HOB_TYPE_GUID_EXT.
*
- * @hob: A pointer to a HOB.
+ * @hdr: A pointer to a HOB.
*
* @return: The size of the data buffer.
*/
-static inline u16 get_guid_hob_data_size(u8 *hob)
+static inline u16 get_guid_hob_data_size(const struct hob_header *hdr)
{
- union hob_pointers hob_p = *(union hob_pointers *)hob;
- return get_hob_length(hob_p) - sizeof(struct hob_guid);
+ return get_hob_length(hdr) - sizeof(struct hob_guid);
}
/* FSP specific GUID HOB definitions */
diff --git a/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h b/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h
index 3ae1b663b9..2a3e987ebb 100644
--- a/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h
+++ b/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h
@@ -145,7 +145,7 @@ u32 fsp_get_tseg_reserved_mem(const void *hob_list, u32 *len);
*
* @retval: A HOB object with matching type; Otherwise NULL.
*/
-void *fsp_get_next_hob(u16 type, const void *hob_list);
+const struct hob_header *fsp_get_next_hob(u16 type, const void *hob_list);
/**
* Returns the next instance of the matched GUID HOB from the starting HOB.
@@ -155,7 +155,8 @@ void *fsp_get_next_hob(u16 type, const void *hob_list);
*
* @retval: A HOB object with matching GUID; Otherwise NULL.
*/
-void *fsp_get_next_guid_hob(const struct efi_guid *guid, const void *hob_list);
+const struct hob_header *fsp_get_next_guid_hob(const struct efi_guid *guid,
+ const void *hob_list);
/**
* This function retrieves a GUID HOB data buffer and size.