281 lines
9.0 KiB
C
281 lines
9.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* This provides a standard way of passing information between boot phases
|
|
* (TPL -> SPL -> U-Boot proper.)
|
|
*
|
|
* A list of blobs of data, tagged with their owner. The list resides in memory
|
|
* and can be updated by SPL, U-Boot, etc.
|
|
*
|
|
* Copyright 2018 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#ifndef __BLOBLIST_H
|
|
#define __BLOBLIST_H
|
|
|
|
enum {
|
|
BLOBLIST_VERSION = 0,
|
|
BLOBLIST_MAGIC = 0xb00757a3,
|
|
BLOBLIST_ALIGN = 16,
|
|
};
|
|
|
|
/* Supported tags - add new ones to tag_name in bloblist.c */
|
|
enum bloblist_tag_t {
|
|
BLOBLISTT_NONE = 0,
|
|
|
|
/* Vendor-specific tags are permitted here */
|
|
BLOBLISTT_EC_HOSTEVENT, /* Chromium OS EC host-event mask */
|
|
BLOBLISTT_SPL_HANDOFF, /* Hand-off info from SPL */
|
|
BLOBLISTT_VBOOT_CTX, /* Chromium OS verified boot context */
|
|
BLOBLISTT_VBOOT_HANDOFF, /* Chromium OS internal handoff info */
|
|
/*
|
|
* Advanced Configuration and Power Interface Global Non-Volatile
|
|
* Sleeping table. This forms part of the ACPI tables passed to Linux.
|
|
*/
|
|
BLOBLISTT_ACPI_GNVS,
|
|
BLOBLISTT_INTEL_VBT, /* Intel Video-BIOS table */
|
|
BLOBLISTT_TPM2_TCG_LOG, /* TPM v2 log space */
|
|
BLOBLISTT_TCPA_LOG, /* TPM log space */
|
|
BLOBLISTT_ACPI_TABLES, /* ACPI tables for x86 */
|
|
BLOBLISTT_SMBIOS_TABLES, /* SMBIOS tables for x86 */
|
|
|
|
BLOBLISTT_COUNT
|
|
};
|
|
|
|
/**
|
|
* struct bloblist_hdr - header for the bloblist
|
|
*
|
|
* This is stored at the start of the bloblist which is always on a 16-byte
|
|
* boundary. Records follow this header. The bloblist normally stays in the
|
|
* same place in memory as SPL and U-Boot execute, but it can be safely moved
|
|
* around.
|
|
*
|
|
* None of the bloblist structures contain pointers but it is possible to put
|
|
* pointers inside a bloblist record if desired. This is not encouraged,
|
|
* since it can make part of the bloblist inaccessible if the pointer is
|
|
* no-longer valid. It is better to just store all the data inside a bloblist
|
|
* record.
|
|
*
|
|
* Each bloblist record is aligned to a 16-byte boundary and follows immediately
|
|
* from the last.
|
|
*
|
|
* @version: BLOBLIST_VERSION
|
|
* @hdr_size: Size of this header, normally sizeof(struct bloblist_hdr). The
|
|
* first bloblist_rec starts at this offset from the start of the header
|
|
* @flags: Space for BLOBLISTF_... flags (none yet)
|
|
* @magic: BLOBLIST_MAGIC
|
|
* @size: Total size of the bloblist (non-zero if valid) including this header.
|
|
* The bloblist extends for this many bytes from the start of this header.
|
|
* When adding new records, the bloblist can grow up to this size.
|
|
* @alloced: Total size allocated so far for this bloblist. This starts out as
|
|
* sizeof(bloblist_hdr) since we need at least that much space to store a
|
|
* valid bloblist
|
|
* @spare: Spare space (for future use)
|
|
* @chksum: CRC32 for the entire bloblist allocated area. Since any of the
|
|
* blobs can be altered after being created, this checksum is only valid
|
|
* when the bloblist is finalised before jumping to the next stage of boot.
|
|
* Note: @chksum is last to make it easier to exclude it from the checksum
|
|
* calculation.
|
|
*/
|
|
struct bloblist_hdr {
|
|
u32 version;
|
|
u32 hdr_size;
|
|
u32 flags;
|
|
u32 magic;
|
|
|
|
u32 size;
|
|
u32 alloced;
|
|
u32 spare;
|
|
u32 chksum;
|
|
};
|
|
|
|
/**
|
|
* struct bloblist_rec - record for the bloblist
|
|
*
|
|
* NOTE: Only exported for testing purposes. Do not use this struct.
|
|
*
|
|
* The bloblist contains a number of records each consisting of this record
|
|
* structure followed by the data contained. Each records is 16-byte aligned.
|
|
*
|
|
* @tag: Tag indicating what the record contains
|
|
* @hdr_size: Size of this header, normally sizeof(struct bloblist_rec). The
|
|
* record's data starts at this offset from the start of the record
|
|
* @size: Size of record in bytes, excluding the header size. This does not
|
|
* need to be aligned (e.g. 3 is OK).
|
|
* @spare: Spare space for other things
|
|
*/
|
|
struct bloblist_rec {
|
|
u32 tag;
|
|
u32 hdr_size;
|
|
u32 size;
|
|
u32 spare;
|
|
};
|
|
|
|
/**
|
|
* bloblist_find() - Find a blob
|
|
*
|
|
* Searches the bloblist and returns the blob with the matching tag
|
|
*
|
|
* @tag: Tag to search for (enum bloblist_tag_t)
|
|
* @size: Expected size of the blob, or 0 for any size
|
|
* @return pointer to blob if found, or NULL if not found, or a blob was found
|
|
* but it is the wrong size
|
|
*/
|
|
void *bloblist_find(uint tag, int size);
|
|
|
|
/**
|
|
* bloblist_add() - Add a new blob
|
|
*
|
|
* Add a new blob to the bloblist
|
|
*
|
|
* This should only be called if you konw there is no existing blob for a
|
|
* particular tag. It is typically safe to call in the first phase of U-Boot
|
|
* (e.g. TPL or SPL). After that, bloblist_ensure() should be used instead.
|
|
*
|
|
* @tag: Tag to add (enum bloblist_tag_t)
|
|
* @size: Size of the blob
|
|
* @align: Alignment of the blob (in bytes), 0 for default
|
|
* @return pointer to the newly added block, or NULL if there is not enough
|
|
* space for the blob
|
|
*/
|
|
void *bloblist_add(uint tag, int size, int align);
|
|
|
|
/**
|
|
* bloblist_ensure_size() - Find or add a blob
|
|
*
|
|
* Find an existing blob, or add a new one if not found
|
|
*
|
|
* @tag: Tag to add (enum bloblist_tag_t)
|
|
* @size: Size of the blob
|
|
* @blobp: Returns a pointer to blob on success
|
|
* @align: Alignment of the blob (in bytes), 0 for default
|
|
* @return 0 if OK, -ENOSPC if it is missing and could not be added due to lack
|
|
* of space, or -ESPIPE it exists but has the wrong size
|
|
*/
|
|
int bloblist_ensure_size(uint tag, int size, int align, void **blobp);
|
|
|
|
/**
|
|
* bloblist_ensure() - Find or add a blob
|
|
*
|
|
* Find an existing blob, or add a new one if not found
|
|
*
|
|
* @tag: Tag to add (enum bloblist_tag_t)
|
|
* @size: Size of the blob
|
|
* @return pointer to blob, or NULL if it is missing and could not be added due
|
|
* to lack of space, or it exists but has the wrong size
|
|
*/
|
|
void *bloblist_ensure(uint tag, int size);
|
|
|
|
/**
|
|
* bloblist_ensure_size_ret() - Find or add a blob
|
|
*
|
|
* Find an existing blob, or add a new one if not found
|
|
*
|
|
* @tag: Tag to add (enum bloblist_tag_t)
|
|
* @sizep: Size of the blob to create; returns size of actual blob
|
|
* @blobp: Returns a pointer to blob on success
|
|
* @return 0 if OK, -ENOSPC if it is missing and could not be added due to lack
|
|
* of space
|
|
*/
|
|
int bloblist_ensure_size_ret(uint tag, int *sizep, void **blobp);
|
|
|
|
/**
|
|
* bloblist_resize() - resize a blob
|
|
*
|
|
* Any blobs above this one are relocated up or down. The resized blob remains
|
|
* in the same place.
|
|
*
|
|
* @tag: Tag to add (enum bloblist_tag_t)
|
|
* @new_size: New size of the blob (>0 to expand, <0 to contract)
|
|
* @return 0 if OK, -ENOSPC if the bloblist does not have enough space, -ENOENT
|
|
* if the tag is not found
|
|
*/
|
|
int bloblist_resize(uint tag, int new_size);
|
|
|
|
/**
|
|
* bloblist_new() - Create a new, empty bloblist of a given size
|
|
*
|
|
* @addr: Address of bloblist
|
|
* @size: Initial size for bloblist
|
|
* @flags: Flags to use for bloblist
|
|
* @return 0 if OK, -EFAULT if addr is not aligned correctly, -ENOSPC is the
|
|
* area is not large enough
|
|
*/
|
|
int bloblist_new(ulong addr, uint size, uint flags);
|
|
|
|
/**
|
|
* bloblist_check() - Check if a bloblist exists
|
|
*
|
|
* @addr: Address of bloblist
|
|
* @size: Expected size of blobsize, or 0 to detect the size
|
|
* @return 0 if OK, -ENOENT if the magic number doesn't match (indicating that
|
|
* there problem is no bloblist at the given address), -EPROTONOSUPPORT
|
|
* if the version does not match, -EIO if the checksum does not match,
|
|
* -EFBIG if the expected size does not match the detected size, -ENOSPC
|
|
* if the size is not large enough to hold the headers
|
|
*/
|
|
int bloblist_check(ulong addr, uint size);
|
|
|
|
/**
|
|
* bloblist_finish() - Set up the bloblist for the next U-Boot part
|
|
*
|
|
* This sets the correct checksum for the bloblist. This ensures that the
|
|
* bloblist will be detected correctly by the next phase of U-Boot.
|
|
*
|
|
* @return 0
|
|
*/
|
|
int bloblist_finish(void);
|
|
|
|
/**
|
|
* bloblist_get_stats() - Get information about the bloblist
|
|
*
|
|
* This returns useful information about the bloblist
|
|
*
|
|
* @basep: Returns base address of bloblist
|
|
* @sizep: Returns the number of bytes used in the bloblist
|
|
* @allocedp: Returns the total space allocated to the bloblist
|
|
*/
|
|
void bloblist_get_stats(ulong *basep, ulong *sizep, ulong *allocedp);
|
|
|
|
/**
|
|
* bloblist_show_stats() - Show information about the bloblist
|
|
*
|
|
* This shows useful information about the bloblist on the console
|
|
*/
|
|
void bloblist_show_stats(void);
|
|
|
|
/**
|
|
* bloblist_show_list() - Show a list of blobs in the bloblist
|
|
*
|
|
* This shows a list of blobs, showing their address, size and tag.
|
|
*/
|
|
void bloblist_show_list(void);
|
|
|
|
/**
|
|
* bloblist_tag_name() - Get the name for a tag
|
|
*
|
|
* @tag: Tag to check
|
|
* @return name of tag, or "invalid" if an invalid tag is provided
|
|
*/
|
|
const char *bloblist_tag_name(enum bloblist_tag_t tag);
|
|
|
|
/**
|
|
* bloblist_reloc() - Relocate the bloblist and optionally resize it
|
|
*
|
|
* @to: Pointer to new bloblist location (must not overlap old location)
|
|
* @to:size: New size for bloblist (must be larger than from_size)
|
|
* @from: Pointer to bloblist to relocate
|
|
* @from_size: Size of bloblist to relocate
|
|
*/
|
|
void bloblist_reloc(void *to, uint to_size, void *from, uint from_size);
|
|
|
|
/**
|
|
* bloblist_init() - Init the bloblist system with a single bloblist
|
|
*
|
|
* This uses CONFIG_BLOBLIST_ADDR and CONFIG_BLOBLIST_SIZE to set up a bloblist
|
|
* for use by U-Boot.
|
|
*/
|
|
int bloblist_init(void);
|
|
|
|
#endif /* __BLOBLIST_H */
|