forked from mirror/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/*
|
|
* QEMU model of the Xilinx eFuse core
|
|
*
|
|
* Copyright (c) 2015 Xilinx Inc.
|
|
*
|
|
* Written by Edgar E. Iglesias <edgari@xilinx.com>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef XLNX_EFUSE_H
|
|
#define XLNX_EFUSE_H
|
|
|
|
#include "sysemu/block-backend.h"
|
|
#include "hw/qdev-core.h"
|
|
|
|
#define TYPE_XLNX_EFUSE "xlnx,efuse"
|
|
OBJECT_DECLARE_SIMPLE_TYPE(XlnxEFuse, XLNX_EFUSE);
|
|
|
|
struct XlnxEFuse {
|
|
DeviceState parent_obj;
|
|
BlockBackend *blk;
|
|
bool blk_ro;
|
|
uint32_t *fuse32;
|
|
|
|
DeviceState *dev;
|
|
|
|
bool init_tbits;
|
|
|
|
uint8_t efuse_nr;
|
|
uint32_t efuse_size;
|
|
|
|
uint32_t *ro_bits;
|
|
uint32_t ro_bits_cnt;
|
|
};
|
|
|
|
/**
|
|
* xlnx_efuse_calc_crc:
|
|
* @data: an array of 32-bit words for which the CRC should be computed
|
|
* @u32_cnt: the array size in number of 32-bit words
|
|
* @zpads: the number of 32-bit zeros prepended to @data before computation
|
|
*
|
|
* This function is used to compute the CRC for an array of 32-bit words,
|
|
* using a Xilinx-specific data padding.
|
|
*
|
|
* Returns: the computed 32-bit CRC
|
|
*/
|
|
uint32_t xlnx_efuse_calc_crc(const uint32_t *data, unsigned u32_cnt,
|
|
unsigned zpads);
|
|
|
|
/**
|
|
* xlnx_efuse_get_bit:
|
|
* @s: the efuse object
|
|
* @bit: the efuse bit-address to read the data
|
|
*
|
|
* Returns: the bit, 0 or 1, at @bit of object @s
|
|
*/
|
|
bool xlnx_efuse_get_bit(XlnxEFuse *s, unsigned int bit);
|
|
|
|
/**
|
|
* xlnx_efuse_set_bit:
|
|
* @s: the efuse object
|
|
* @bit: the efuse bit-address to be written a value of 1
|
|
*
|
|
* Returns: true on success, false on failure
|
|
*/
|
|
bool xlnx_efuse_set_bit(XlnxEFuse *s, unsigned int bit);
|
|
|
|
/**
|
|
* xlnx_efuse_k256_check:
|
|
* @s: the efuse object
|
|
* @crc: the 32-bit CRC to be compared with
|
|
* @start: the efuse bit-address (which must be multiple of 32) of the
|
|
* start of a 256-bit array
|
|
*
|
|
* This function computes the CRC of a 256-bit array starting at @start
|
|
* then compares to the given @crc
|
|
*
|
|
* Returns: true of @crc == computed, false otherwise
|
|
*/
|
|
bool xlnx_efuse_k256_check(XlnxEFuse *s, uint32_t crc, unsigned start);
|
|
|
|
/**
|
|
* xlnx_efuse_tbits_check:
|
|
* @s: the efuse object
|
|
*
|
|
* This function inspects a number of efuse bits at specific addresses
|
|
* to see if they match a validation pattern. Each pattern is a group
|
|
* of 4 bits, and there are 3 groups.
|
|
*
|
|
* Returns: a 3-bit mask, where a bit of '1' means the corresponding
|
|
* group has a valid pattern.
|
|
*/
|
|
uint32_t xlnx_efuse_tbits_check(XlnxEFuse *s);
|
|
|
|
/**
|
|
* xlnx_efuse_get_row:
|
|
* @s: the efuse object
|
|
* @bit: the efuse bit address for which a 32-bit value is read
|
|
*
|
|
* Returns: the entire 32 bits of the efuse, starting at a bit
|
|
* address that is multiple of 32 and contains the bit at @bit
|
|
*/
|
|
static inline uint32_t xlnx_efuse_get_row(XlnxEFuse *s, unsigned int bit)
|
|
{
|
|
if (!(s->fuse32)) {
|
|
return 0;
|
|
} else {
|
|
unsigned int row_idx = bit / 32;
|
|
|
|
assert(row_idx < (s->efuse_size * s->efuse_nr / 32));
|
|
return s->fuse32[row_idx];
|
|
}
|
|
}
|
|
|
|
#endif
|