sys_io.h

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/*
 * Copyright (c) 2015 Intel Corporation.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_ARCH_ARC_V2_SYS_IO_H_
#define ZEPHYR_INCLUDE_ARCH_ARC_V2_SYS_IO_H_
 
#ifndef _ASMLANGUAGE
 
#include <toolchain.h>
#include <sys/sys_io.h>
#include <arch/arc/v2/aux_regs.h>
 
#include <zephyr/types.h>
#include <stddef.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* Implementation of sys_io.h's documented functions */
 
static ALWAYS_INLINE
        void sys_out8(uint8_t data, io_port_t port)
{
        z_arc_v2_aux_reg_write(port, data);
}
 
static ALWAYS_INLINE
        uint8_t sys_in8(io_port_t port)
{
        return (uint8_t)(z_arc_v2_aux_reg_read(port) & 0x000000ff);
}
 
static ALWAYS_INLINE
        void sys_out16(uint16_t data, io_port_t port)
{
        z_arc_v2_aux_reg_write(port, data);
}
 
static ALWAYS_INLINE
        uint16_t sys_in16(io_port_t port)
{
        return (uint16_t)(z_arc_v2_aux_reg_read(port) & 0x0000ffff);
}
 
static ALWAYS_INLINE
        void sys_out32(uint32_t data, io_port_t port)
{
        z_arc_v2_aux_reg_write(port, data);
}
 
static ALWAYS_INLINE
        uint32_t sys_in32(io_port_t port)
{
        return z_arc_v2_aux_reg_read(port);
}
 
static ALWAYS_INLINE
        void sys_io_set_bit(io_port_t port, unsigned int bit)
{
        uint32_t reg = 0;
 
        __asm__ volatile("lr    %1, [%0]\n"
                         "bset  %1, %1, %2\n"
                         "sr    %1, [%0];\n\t"
                         :
                         : "ir" (port),
                           "r" (reg), "ir" (bit)
                         : "memory", "cc");
}
 
static ALWAYS_INLINE
        void sys_io_clear_bit(io_port_t port, unsigned int bit)
{
        uint32_t reg = 0;
 
        __asm__ volatile("lr    %1, [%0]\n"
                         "bclr  %1, %1, %2\n"
                         "sr    %1, [%0];\n\t"
                         :
                         : "ir" (port),
                           "r" (reg), "ir" (bit)
                         : "memory", "cc");
}
 
static ALWAYS_INLINE
        int sys_io_test_bit(io_port_t port, unsigned int bit)
{
        uint32_t status = _ARC_V2_STATUS32;
        uint32_t reg = 0;
        uint32_t ret;
 
        __asm__ volatile("lr    %2, [%1]\n"
                         "btst  %2, %3\n"
                         "lr    %0, [%4];\n\t"
                         : "=r" (ret)
                         : "ir" (port),
                           "r" (reg), "ir" (bit), "i" (status)
                         : "memory", "cc");
 
        return !(ret & _ARC_V2_STATUS32_Z);
}
 
static ALWAYS_INLINE
        int sys_io_test_and_set_bit(io_port_t port, unsigned int bit)
{
        int ret;
 
        ret = sys_io_test_bit(port, bit);
        sys_io_set_bit(port, bit);
 
        return ret;
}
 
static ALWAYS_INLINE
        int sys_io_test_and_clear_bit(io_port_t port, unsigned int bit)
{
        int ret;
 
        ret = sys_io_test_bit(port, bit);
        sys_io_clear_bit(port, bit);
 
        return ret;
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* _ASMLANGUAGE */
 
#endif /* ZEPHYR_INCLUDE_ARCH_ARC_V2_SYS_IO_H_ */