/*
 * Copyright (C) 2018 ETH Zurich and University of Bologna
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __HAL_PULP_IO__
#define __HAL_PULP_IO__

#include <stdint.h>

#define pulp_write8(add, val_) (*(volatile unsigned char *)(long)(add) = val_)
#define pulp_write16(add, val_) (*(volatile unsigned short *)(long)(add) = val_)
#define pulp_write32(add, val_) (*(volatile unsigned int *)(long)(add) = val_)
#define pulp_write(add, val_) (*(volatile unsigned int *)(long)(add) = val_)

#if 1

#define pulp_read8(add) (*(volatile unsigned char *)(long)(add))
#define pulp_read16(add) (*(volatile unsigned short *)(long)(add))
#define pulp_read32(add) (*(volatile unsigned int *)(long)(add))
#define pulp_read(add) (*(volatile unsigned int *)(long)(add))

#else

static inline uint8_t pulp_read8(uint32_t add)
{
  __asm__ __volatile__ ("" : : : "memory");
  uint8_t result = *(volatile uint8_t *)add;
  asm volatile("l.nop;");
  __asm__ __volatile__ ("" : : : "memory");
  return result;
}

static inline uint16_t pulp_read16(uint32_t add)
{
  __asm__ __volatile__ ("" : : : "memory");
  uint16_t result = *(volatile uint16_t *)add;
  asm volatile("nop;");
  __asm__ __volatile__ ("" : : : "memory");
  return result;
}

static inline uint32_t pulp_read32(uint32_t add)
{
  __asm__ __volatile__ ("" : : : "memory");
  uint32_t result = *(volatile uint32_t *)add;
  asm volatile("nop;");
  __asm__ __volatile__ ("" : : : "memory");
  return result;
}

static inline uint32_t pulp_read(uint32_t add)
{
  __asm__ __volatile__ ("" : : : "memory");
  uint32_t result = *(volatile uint32_t *)add;
  asm volatile("nop;");
  __asm__ __volatile__ ("" : : : "memory");
  return result;
}

#endif

#if defined(__riscv__) && !defined(RV_ISA_RV32) && !defined(__LLVM__)
#define IP_WRITE_VOL(base, offset, value) __builtin_pulp_write_base_off_v((value), (base), (offset))
#define IP_WRITE(base, offset, value) __builtin_pulp_OffsetedWrite((value), (int *)(base), (offset))
#define IP_READ(base, offset) __builtin_pulp_OffsetedRead((int *)(base), (offset))
#else
#define IP_WRITE_VOL(base, offset, value) pulp_write32((base) + (offset), (value))
#define IP_WRITE(base, offset, value) pulp_write32((base) + (offset), (value))
#define IP_READ(base, offset) pulp_read32((base) + (offset))
#endif

#endif