// SPDX-License-Identifier: GPL-2.0-only

  /*
   * Copyright 2006 PathScale, Inc.  All Rights Reserved.

   */

  #include <linux/export.h>

  #include <linux/io.h>

  
  /**
   * __iowrite32_copy - copy data to MMIO space, in 32-bit units
   * @to: destination, in MMIO space (must be 32-bit aligned)
   * @from: source (must be 32-bit aligned)
   * @count: number of 32-bit quantities to copy
   *
   * Copy data from kernel space to MMIO space, in units of 32 bits at a
   * time.  Order of access is not guaranteed, nor is a memory barrier
   * performed afterwards.
   */
  void __attribute__((weak)) __iowrite32_copy(void __iomem *to,
  					    const void *from,
  					    size_t count)
  {
  	u32 __iomem *dst = to;
  	const u32 *src = from;
  	const u32 *end = src + count;
  
  	while (src < end)
  		__raw_writel(*src++, dst++);
  }
  EXPORT_SYMBOL_GPL(__iowrite32_copy);

  
  /**

   * __ioread32_copy - copy data from MMIO space, in 32-bit units
   * @to: destination (must be 32-bit aligned)
   * @from: source, in MMIO space (must be 32-bit aligned)
   * @count: number of 32-bit quantities to copy
   *
   * Copy data from MMIO space to kernel space, in units of 32 bits at a
   * time.  Order of access is not guaranteed, nor is a memory barrier
   * performed afterwards.
   */
  void __ioread32_copy(void *to, const void __iomem *from, size_t count)
  {
  	u32 *dst = to;
  	const u32 __iomem *src = from;
  	const u32 __iomem *end = src + count;
  
  	while (src < end)
  		*dst++ = __raw_readl(src++);
  }
  EXPORT_SYMBOL_GPL(__ioread32_copy);
  
  /**

   * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
   * @to: destination, in MMIO space (must be 64-bit aligned)
   * @from: source (must be 64-bit aligned)
   * @count: number of 64-bit quantities to copy
   *
   * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
   * time.  Order of access is not guaranteed, nor is a memory barrier
   * performed afterwards.
   */
  void __attribute__((weak)) __iowrite64_copy(void __iomem *to,
  					    const void *from,
  					    size_t count)
  {
  #ifdef CONFIG_64BIT
  	u64 __iomem *dst = to;
  	const u64 *src = from;
  	const u64 *end = src + count;
  
  	while (src < end)
  		__raw_writeq(*src++, dst++);
  #else
  	__iowrite32_copy(to, from, count * 2);
  #endif
  }
  
  EXPORT_SYMBOL_GPL(__iowrite64_copy);