26 lines
637 B
C
26 lines
637 B
C
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/*
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* Copyright (c) 2019 Antmicro <www.antmicro.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <drivers/hwinfo.h>
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#include <soc.h>
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#include <string.h>
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#include <device.h>
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#include <sys/util.h>
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ssize_t z_impl_hwinfo_get_device_id(u8_t *buffer, size_t length)
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{
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u32_t volatile *ptr = (u32_t volatile *)(DT_INST_0_LITEX_DNA0_BASE_ADDRESS);
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ssize_t end = MIN(length, (DT_INST_0_LITEX_DNA0_SIZE / sizeof(u32_t)));
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for (int i = 0; i < end; i++) {
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/* In LiteX even though registers are 32-bit wide, each one
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contains meaningful data only in the lowest 8 bits */
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buffer[i] = (u8_t)(ptr[i] & 0xff);
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}
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return end;
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}
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