162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci#include <linux/export.h> 462306a36Sopenharmony_ci#include <linux/io.h> 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci/** 762306a36Sopenharmony_ci * __ioread64_copy - copy data from MMIO space, in 64-bit units 862306a36Sopenharmony_ci * @to: destination (must be 64-bit aligned) 962306a36Sopenharmony_ci * @from: source, in MMIO space (must be 64-bit aligned) 1062306a36Sopenharmony_ci * @count: number of 64-bit quantities to copy 1162306a36Sopenharmony_ci * 1262306a36Sopenharmony_ci * Copy data from MMIO space to kernel space, in units of 32 or 64 bits at a 1362306a36Sopenharmony_ci * time. Order of access is not guaranteed, nor is a memory barrier 1462306a36Sopenharmony_ci * performed afterwards. 1562306a36Sopenharmony_ci */ 1662306a36Sopenharmony_civoid __ioread64_copy(void *to, const void __iomem *from, size_t count) 1762306a36Sopenharmony_ci{ 1862306a36Sopenharmony_ci#ifdef CONFIG_64BIT 1962306a36Sopenharmony_ci u64 *dst = to; 2062306a36Sopenharmony_ci const u64 __iomem *src = from; 2162306a36Sopenharmony_ci const u64 __iomem *end = src + count; 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci while (src < end) 2462306a36Sopenharmony_ci *dst++ = __raw_readq(src++); 2562306a36Sopenharmony_ci#else 2662306a36Sopenharmony_ci __ioread32_copy(to, from, count * 2); 2762306a36Sopenharmony_ci#endif 2862306a36Sopenharmony_ci} 2962306a36Sopenharmony_ciEXPORT_SYMBOL_GPL(__ioread64_copy); 30