c00ffef47c
Change-Id: I1c1b5710a5236fe4a3bdda1fc978393e636e9817 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/45773 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Julius Werner <jwerner@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause */
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#ifndef __VPD_H__
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#define __VPD_H__
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#include <types.h>
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#define GOOGLE_VPD_2_0_OFFSET 0x600
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enum vpd_region {
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VPD_RO,
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VPD_RW,
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VPD_RO_THEN_RW,
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VPD_RW_THEN_RO
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};
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/*
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* Reads VPD string value by key.
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*
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* Reads in at most one less than size characters from VPD and stores them
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* into buffer. A terminating null byte ('\0') is stored after the last
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* character in the buffer.
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*
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* Returns NULL if key is not found, otherwise buffer.
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*/
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char *vpd_gets(const char *key, char *buffer, int size, enum vpd_region region);
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/*
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* Find VPD value by key.
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*
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* Searches for a VPD entry in the VPD cache. If found, places the size of the
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* entry into '*size' and returns the pointer to the entry data.
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*
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* This function presumes that VPD is cached in DRAM (which is the case in the
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* current implementation) and as such returns the pointer into the cache. The
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* user is not supposed to modify the data, and does not have to free the
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* memory.
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*
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* Returns NULL if key is not found.
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*/
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const void *vpd_find(const char *key, int *size, enum vpd_region region);
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/*
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* Find value of boolean type vpd key.
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*
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* During the process, necessary checking is done, such as making
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* sure the value length is 1, and value is either '1' or '0'.
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*/
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bool vpd_get_bool(const char *key, enum vpd_region region,
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uint8_t *val);
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/*
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* Find value of integer type by vpd key.
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*
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* Expects to find a decimal string, trailing chars are ignored.
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* Returns true if the key is found and the value is not too long and
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* starts with a decimal digit.
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*/
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bool vpd_get_int(const char *key, enum vpd_region region, int *val);
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#endif /* __VPD_H__ */
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