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libfdt: add acpi table verification support

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am: e433acb347

Change-Id: I778d39a3e44559418484f7197c620d9f0b16c9b2
This commit is contained in:
Chen, ZhiminX 2018-10-09 01:44:11 -07:00 committed by android-build-merger
commit 8df5f5b1e0
4 changed files with 124 additions and 1 deletions
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1
libfdt/Android.bp
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@ -17,6 +17,7 @@ cc_library_static {
"fdt_empty_tree.c",
"fdt_addresses.c",
"fdt_overlay.c",
"acpi.c",
],
export_include_dirs: ["."],
}

2
libfdt/Makefile.libfdt
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@ -7,5 +7,5 @@ LIBFDT_soname = libfdt.$(SHAREDLIB_EXT).1
LIBFDT_INCLUDES = fdt.h libfdt.h libfdt_env.h
LIBFDT_VERSION = version.lds
LIBFDT_SRCS = fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c fdt_empty_tree.c \
fdt_addresses.c fdt_overlay.c
fdt_addresses.c fdt_overlay.c acpi.c
LIBFDT_OBJS = $(LIBFDT_SRCS:%.c=%.o)

48
libfdt/acpi.c Normal file
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@ -0,0 +1,48 @@
/*
* Copyright (c) 2018, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "libacpi.h"
uint8_t acpi_csum(const void *base, int n) {
uint8_t *p;
uint8_t sum;
int bytesDone;
p = (uint8_t*)base;
sum = 0;
for (bytesDone = 0; bytesDone < n; bytesDone++) {
sum += *p;
p++;
}
return sum;
}

74
libfdt/libacpi.h Normal file
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@ -0,0 +1,74 @@
/*
* Copyright (c) 2018, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef _LIBACPI_H
#define _LIBACPI_H
#include "libfdt.h"
#pragma pack(1)
typedef struct {
uint32_t Signature; /* ASCII Table identifier */
uint32_t Length; /* Length of the table, including the header */
uint8_t Revision; /* Revision of the structure */
uint8_t Checksum; /* Sum of all fields must be 0 */
uint8_t OemId[6]; /* ASCII OEM identifier */
uint64_t OemTableId; /* ASCII OEM table identifier */
uint32_t OemRevision; /* OEM supplied revision number */
uint32_t CreatorId; /* Vendor ID of utility creator of the table */
uint32_t CreatorRevision; /* Revision of utility creator of the table */
} EFI_ACPI_DESCRIPTION_HEADER;
#pragma pack()
/**********************************************************************/
/* General functions */
/**********************************************************************/
#define acpi_get_header(acpi, field) \
((const EFI_ACPI_DESCRIPTION_HEADER *)(acpi))->field
#define acpi_signature(acpi) (acpi_get_header(acpi, Signature))
#define acpi_length(acpi) (acpi_get_header(acpi, Length))
/* convert 2 bytes ASCII to uint16 */
#define SIGNATURE_16(A, B) ((A) | (B << 8))
/* convert 4 bytes ASCII to uint32 */
#define SIGNATURE_32(A, B, C, D) ((SIGNATURE_16 (A, B)) | (SIGNATURE_16 (C, D) << 16))
/* convert 8 bytes ASCII to uint64 */
#define SIGNATURE_64(A, B, C, D, E, F, G, H) \
(SIGNATURE_32 (A, B, C, D) | ((UINT64) (SIGNATURE_32 (E, F, G, H)) << 32))
#define SSDT_MAGIC (const unsigned)SIGNATURE_32('S', 'S', 'D', 'T')
#define DSDT_MAGIC (const unsigned)SIGNATURE_32('D', 'S', 'D', 'T')
#define ACPI_TABLE_MAGIC 0x41435049
/* checksum byte by byte for acpi table */
uint8_t acpi_csum(const void *base, int n);
#endif /* ifndef _LIBACPI_H */