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cd116d177b
The TZC-400 performs security checks on transactions to memory or peripherals. Separate regions can be created in the address space each with individual security settings. Limitations: This driver does not currently support raising an interrupt on access violation. Change-Id: Idf8ed64b4d8d218fc9b6f9d75acdb2cd441d2449
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdint.h>
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void mmio_write_8(uintptr_t addr, uint8_t value)
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{
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*(volatile uint8_t*)addr = value;
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}
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uint8_t mmio_read_8(uintptr_t addr)
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{
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return *(volatile uint8_t*)addr;
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}
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void mmio_write_32(uintptr_t addr, uint32_t value)
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{
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*(volatile uint32_t*)addr = value;
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}
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uint32_t mmio_read_32(uintptr_t addr)
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{
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return *(volatile uint32_t*)addr;
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}
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void mmio_write_64(uintptr_t addr, uint64_t value)
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{
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*(volatile uint64_t*)addr = value;
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}
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uint64_t mmio_read_64(uintptr_t addr)
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{
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return *(volatile uint64_t*)addr;
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}
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