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34412eda32
NXP Central Security Unit(CSU) for NXP SoC. CSU is used for: - Access permissions for peripheral that donot have their own access control. - Locking of individual CSU settings until the next POR - General purpose security related control bits Refer NXP SoC manuals fro more details. Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com> Change-Id: I07a4729c79c5e2597f8b2a782e87e09f7f30c2ca
34 lines
691 B
C
34 lines
691 B
C
/*
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* Copyright 2020 NXP
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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*/
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#include <endian.h>
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#include <common/debug.h>
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#include <csu.h>
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#include <lib/mmio.h>
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void enable_layerscape_ns_access(struct csu_ns_dev_st *csu_ns_dev,
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uint32_t num, uintptr_t nxp_csu_addr)
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{
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uint32_t *base = (uint32_t *)nxp_csu_addr;
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uint32_t *reg;
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uint32_t val;
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int i;
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for (i = 0; i < num; i++) {
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reg = base + csu_ns_dev[i].ind / 2U;
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val = be32toh(mmio_read_32((uintptr_t)reg));
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if (csu_ns_dev[i].ind % 2U == 0U) {
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val &= 0x0000ffffU;
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val |= csu_ns_dev[i].val << 16U;
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} else {
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val &= 0xffff0000U;
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val |= csu_ns_dev[i].val;
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}
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mmio_write_32((uintptr_t)reg, htobe32(val));
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}
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}
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