From 949dbc12db8ba628004ac70359ca0e0edf98432e Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Tue, 30 Dec 2014 16:02:05 +0800 Subject: 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 Acked-by: Simon Glass --- arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h | 46 +++++++++------------- .../include/asm/arch-queensbay/fsp/fsp_support.h | 5 ++- 2 files changed, 21 insertions(+), 30 deletions(-) (limited to 'arch/x86/include/asm') 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 380b64e..5110361 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 3ae1b66..2a3e987 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. -- cgit v1.1