b3dd8b2796
The functions `hw_write_masked` and `hw_xor_bits` (as defined in pico-sdk) were defined in NuttX twice. Additionally these definitions were in conflict (one lacked the `volatile` modifier). Now these functions and their dependencies are defined in a new header file. Its name is based on the filename of the original definition in pico-sdk: src/rp2_common/hardware_base/include/hardware/address_mapped.h This change should fix the potential issue of GPIO operations failing due to compiler optimizations caused by the absence of `volatile`. Signed-off-by: Lars Kruse <devel@sumpfralle.de>
69 lines
3.1 KiB
C
69 lines
3.1 KiB
C
/****************************************************************************
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* arch/arm/src/rp2040/hardware/rp2040_address_mapped.h
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*
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* SPDX-License-Identifier: BSD-3-Clause
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* SPDX-FileCopyrightText: 2020 Raspberry Pi (Trading) Ltd.
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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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_RP2040_HARDWARE_RP2040_ADDRESS_MAPPED_H
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#define __ARCH_ARM_SRC_RP2040_HARDWARE_RP2040_ADDRESS_MAPPED_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define REG_ALIAS_XOR_BITS (0x1u << 12u)
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#define hw_alias_check_addr(addr) ((uintptr_t)(addr))
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#define hw_xor_alias_untyped(addr) ((void *)(REG_ALIAS_XOR_BITS | hw_alias_check_addr(addr)))
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/****************************************************************************
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* Inline Functions
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****************************************************************************/
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always_inline_function static void hw_xor_bits(volatile uint32_t *addr,
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uint32_t mask)
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{
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*(volatile uint32_t *)hw_xor_alias_untyped((volatile void *)addr) = mask;
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}
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always_inline_function static void hw_write_masked(volatile uint32_t *addr,
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uint32_t values, uint32_t write_mask)
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{
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hw_xor_bits(addr, (*addr ^ values) & write_mask);
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}
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#endif /* __ARCH_ARM_SRC_RP2040_HARDWARE_RP2040_ADDRESS_MAPPED_H */
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