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/*-
* Copyright (c) 2016 Landon Fuller <landon@landonf.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* NO WARRANTY
* 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 NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include "bhnd_nvram_map_data.h"
/*
* CRC-8 lookup table used to checksum SPROM and NVRAM data via
* bhnd_nvram_crc8().
*
* Generated with following parameters:
* polynomial: CRC-8 (x^8 + x^7 + x^6 + x^4 + x^2 + 1)
* reflected bits: false
* reversed: true
*/
const uint8_t bhnd_nvram_crc8_tab[] = {
0x00, 0xf7, 0xb9, 0x4e, 0x25, 0xd2, 0x9c, 0x6b, 0x4a, 0xbd, 0xf3,
0x04, 0x6f, 0x98, 0xd6, 0x21, 0x94, 0x63, 0x2d, 0xda, 0xb1, 0x46,
0x08, 0xff, 0xde, 0x29, 0x67, 0x90, 0xfb, 0x0c, 0x42, 0xb5, 0x7f,
0x88, 0xc6, 0x31, 0x5a, 0xad, 0xe3, 0x14, 0x35, 0xc2, 0x8c, 0x7b,
0x10, 0xe7, 0xa9, 0x5e, 0xeb, 0x1c, 0x52, 0xa5, 0xce, 0x39, 0x77,
0x80, 0xa1, 0x56, 0x18, 0xef, 0x84, 0x73, 0x3d, 0xca, 0xfe, 0x09,
0x47, 0xb0, 0xdb, 0x2c, 0x62, 0x95, 0xb4, 0x43, 0x0d, 0xfa, 0x91,
0x66, 0x28, 0xdf, 0x6a, 0x9d, 0xd3, 0x24, 0x4f, 0xb8, 0xf6, 0x01,
0x20, 0xd7, 0x99, 0x6e, 0x05, 0xf2, 0xbc, 0x4b, 0x81, 0x76, 0x38,
0xcf, 0xa4, 0x53, 0x1d, 0xea, 0xcb, 0x3c, 0x72, 0x85, 0xee, 0x19,
0x57, 0xa0, 0x15, 0xe2, 0xac, 0x5b, 0x30, 0xc7, 0x89, 0x7e, 0x5f,
0xa8, 0xe6, 0x11, 0x7a, 0x8d, 0xc3, 0x34, 0xab, 0x5c, 0x12, 0xe5,
0x8e, 0x79, 0x37, 0xc0, 0xe1, 0x16, 0x58, 0xaf, 0xc4, 0x33, 0x7d,
0x8a, 0x3f, 0xc8, 0x86, 0x71, 0x1a, 0xed, 0xa3, 0x54, 0x75, 0x82,
0xcc, 0x3b, 0x50, 0xa7, 0xe9, 0x1e, 0xd4, 0x23, 0x6d, 0x9a, 0xf1,
0x06, 0x48, 0xbf, 0x9e, 0x69, 0x27, 0xd0, 0xbb, 0x4c, 0x02, 0xf5,
0x40, 0xb7, 0xf9, 0x0e, 0x65, 0x92, 0xdc, 0x2b, 0x0a, 0xfd, 0xb3,
0x44, 0x2f, 0xd8, 0x96, 0x61, 0x55, 0xa2, 0xec, 0x1b, 0x70, 0x87,
0xc9, 0x3e, 0x1f, 0xe8, 0xa6, 0x51, 0x3a, 0xcd, 0x83, 0x74, 0xc1,
0x36, 0x78, 0x8f, 0xe4, 0x13, 0x5d, 0xaa, 0x8b, 0x7c, 0x32, 0xc5,
0xae, 0x59, 0x17, 0xe0, 0x2a, 0xdd, 0x93, 0x64, 0x0f, 0xf8, 0xb6,
0x41, 0x60, 0x97, 0xd9, 0x2e, 0x45, 0xb2, 0xfc, 0x0b, 0xbe, 0x49,
0x07, 0xf0, 0x9b, 0x6c, 0x22, 0xd5, 0xf4, 0x03, 0x4d, 0xba, 0xd1,
0x26, 0x68, 0x9f
};
/**
* Return the size of type @p dt.
*
* @param dt NVRAM data type.
* @result the byte width of @p dt.
*/
size_t
bhnd_nvram_type_width(bhnd_nvram_dt dt)
{
switch (dt) {
case BHND_NVRAM_DT_INT8:
case BHND_NVRAM_DT_UINT8:
case BHND_NVRAM_DT_CHAR:
return (sizeof(uint8_t));
case BHND_NVRAM_DT_INT16:
case BHND_NVRAM_DT_UINT16:
return (sizeof(uint16_t));
case BHND_NVRAM_DT_INT32:
case BHND_NVRAM_DT_UINT32:
return (sizeof(uint32_t));
}
/* Quiesce gcc4.2 */
panic("bhnd nvram data type %u unknown", dt);
}
/**
* Return the variable definition for @p varname, if any.
*
* @param varname variable name
*
* @retval bhnd_nvram_var If a valid definition for @p varname is found.
* @retval NULL If no definition for @p varname is found.
*/
const struct bhnd_nvram_var *
bhnd_nvram_var_defn(const char *varname)
{
size_t min, mid, max;
int order;
/*
* Locate the requested variable using a binary search.
*
* The variable table is guaranteed to be sorted in lexicographical
* order (using the 'C' locale for collation rules)
*/
min = 0;
mid = 0;
max = nitems(bhnd_nvram_vars) - 1;
while (max >= min) {
/* Select midpoint */
mid = (min + max) / 2;
/* Determine which side of the partition to search */
order = strcmp(bhnd_nvram_vars[mid].name, varname);
if (order < 0) {
/* Search upper partition */
min = mid + 1;
} else if (order > 0) {
/* Search lower partition */
max = mid - 1;
} else if (order == 0) {
/* Match found */
return (&bhnd_nvram_vars[mid]);
}
}
/* Not found */
return (NULL);
}
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