/* SPDX-License-Identifier: Intel */ /* * Copyright (C) 2013, Intel Corporation * Copyright (C) 2014, Bin Meng */ #ifndef __HOB_H__ #define __HOB_H__ #include #include /* Type of HOB Header */ #define HOB_TYPE_MEM_ALLOC 0x0002 #define HOB_TYPE_RES_DESC 0x0003 #define HOB_TYPE_GUID_EXT 0x0004 #define HOB_TYPE_UNUSED 0xFFFE #define HOB_TYPE_EOH 0xFFFF /* Value of ResourceType in HOB_RES_DESC */ #define RES_SYS_MEM 0x00000000 #define RES_MMAP_IO 0x00000001 #define RES_IO 0x00000002 #define RES_FW_DEVICE 0x00000003 #define RES_MMAP_IO_PORT 0x00000004 #define RES_MEM_RESERVED 0x00000005 #define RES_IO_RESERVED 0x00000006 #define RES_MAX_MEM_TYPE 0x00000007 /* * These types can be ORed together as needed. * * The first three enumerations describe settings * The rest of the settings describe capabilities */ #define RES_ATTR_PRESENT 0x00000001 #define RES_ATTR_INITIALIZED 0x00000002 #define RES_ATTR_TESTED 0x00000004 #define RES_ATTR_SINGLE_BIT_ECC 0x00000008 #define RES_ATTR_MULTIPLE_BIT_ECC 0x00000010 #define RES_ATTR_ECC_RESERVED_1 0x00000020 #define RES_ATTR_ECC_RESERVED_2 0x00000040 #define RES_ATTR_READ_PROTECTED 0x00000080 #define RES_ATTR_WRITE_PROTECTED 0x00000100 #define RES_ATTR_EXECUTION_PROTECTED 0x00000200 #define RES_ATTR_UNCACHEABLE 0x00000400 #define RES_ATTR_WRITE_COMBINEABLE 0x00000800 #define RES_ATTR_WRITE_THROUGH_CACHEABLE 0x00001000 #define RES_ATTR_WRITE_BACK_CACHEABLE 0x00002000 #define RES_ATTR_16_BIT_IO 0x00004000 #define RES_ATTR_32_BIT_IO 0x00008000 #define RES_ATTR_64_BIT_IO 0x00010000 #define RES_ATTR_UNCACHED_EXPORTED 0x00020000 /* * Describes the format and size of the data inside the HOB. * All HOBs must contain this generic HOB header. */ struct hob_header { u16 type; /* HOB type */ u16 len; /* HOB length */ u32 reserved; /* always zero */ }; /* * Describes all memory ranges used during the HOB producer phase that * exist outside the HOB list. This HOB type describes how memory is used, * not the physical attributes of memory. */ struct hob_mem_alloc { struct hob_header hdr; /* * A GUID that defines the memory allocation region's type and purpose, * as well as other fields within the memory allocation HOB. This GUID * is used to define the additional data within the HOB that may be * present for the memory allocation HOB. Type efi_guid_t is defined in * InstallProtocolInterface() in the UEFI 2.0 specification. */ efi_guid_t name; /* * The base address of memory allocated by this HOB. * Type phys_addr_t is defined in AllocatePages() in the UEFI 2.0 * specification. */ phys_addr_t mem_base; /* The length in bytes of memory allocated by this HOB */ phys_size_t mem_len; /* * Defines the type of memory allocated by this HOB. * The memory type definition follows the EFI_MEMORY_TYPE definition. * Type EFI_MEMORY_TYPE is defined in AllocatePages() in the UEFI 2.0 * specification. */ enum efi_memory_type mem_type; /* padding */ u8 reserved[4]; }; /* * Describes the resource properties of all fixed, nonrelocatable resource * ranges found on the processor host bus during the HOB producer phase. */ struct hob_res_desc { struct hob_header hdr; /* * A GUID representing the owner of the resource. This GUID is * used by HOB consumer phase components to correlate device * ownership of a resource. */ efi_guid_t owner; u32 type; u32 attr; /* The physical start address of the resource region */ phys_addr_t phys_start; /* The number of bytes of the resource region */ phys_size_t len; }; /* * Allows writers of executable content in the HOB producer phase to * maintain and manage HOBs with specific GUID. */ struct hob_guid { struct hob_header hdr; /* A GUID that defines the contents of this HOB */ efi_guid_t name; /* GUID specific data goes here */ }; /** * get_next_hob() - return a pointer to the next HOB in the HOB list * * This macro returns a pointer to HOB that follows the HOB specified by hob * in the HOB List. * * @hdr: A pointer to a HOB. * * @return A pointer to the next HOB in the HOB list. */ static inline const struct hob_header *get_next_hob(const struct hob_header *hdr) { return (const struct hob_header *)((uintptr_t)hdr + hdr->len); } /** * end_of_hob() - determine if a HOB is the last HOB in the HOB list * * This macro determine if the HOB specified by hob is the last HOB in the * HOB list. If hob is last HOB in the HOB list, then true is returned. * Otherwise, false is returned. * * @hdr: A pointer to a HOB. * * @return true: The HOB specified by hdr is the last HOB in the HOB list. * @return false: The HOB specified by hdr is not the last HOB in the HOB list. */ static inline bool end_of_hob(const struct hob_header *hdr) { return hdr->type == HOB_TYPE_EOH; } /** * get_guid_hob_data() - return a pointer to data buffer from a HOB of * type HOB_TYPE_GUID_EXT * * 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. * * @hdr: A pointer to a HOB. * * @return A pointer to the data buffer in a HOB. */ static inline void *get_guid_hob_data(const struct hob_header *hdr) { return (void *)((uintptr_t)hdr + sizeof(struct hob_guid)); } /** * get_guid_hob_data_size() - return the size of the data buffer from a HOB * of type HOB_TYPE_GUID_EXT * * 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. * * @hdr: A pointer to a HOB. * * @return The size of the data buffer. */ static inline u16 get_guid_hob_data_size(const struct hob_header *hdr) { return hdr->len - sizeof(struct hob_guid); } /** * Returns the next instance of a HOB type from the starting HOB. * * @type: HOB type to search * @hob_list: A pointer to the HOB list * * @return A HOB object with matching type; Otherwise NULL. */ const struct hob_header *hob_get_next_hob(uint type, const void *hob_list); /** * Returns the next instance of the matched GUID HOB from the starting HOB. * * @guid: GUID to search * @hob_list: A pointer to the HOB list * * @return A HOB object with matching GUID; Otherwise NULL. */ const struct hob_header *hob_get_next_guid_hob(const efi_guid_t *guid, const void *hob_list); /** * This function retrieves a GUID HOB data buffer and size. * * @hob_list: A HOB list pointer. * @len: A pointer to the GUID HOB data buffer length. * If the GUID HOB is located, the length will be updated. * @guid A pointer to HOB GUID. * * @return NULL: Failed to find the GUID HOB. * @return others: GUID HOB data buffer pointer. */ void *hob_get_guid_hob_data(const void *hob_list, u32 *len, const efi_guid_t *guid); #endif /* __HOB_H__ */