From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/mips/lib/iomap_copy.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 arch/mips/lib/iomap_copy.c (limited to 'arch/mips/lib/iomap_copy.c') diff --git a/arch/mips/lib/iomap_copy.c b/arch/mips/lib/iomap_copy.c new file mode 100644 index 000000000..157500a09 --- /dev/null +++ b/arch/mips/lib/iomap_copy.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include + +/** + * __ioread64_copy - copy data from MMIO space, in 64-bit units + * @to: destination (must be 64-bit aligned) + * @from: source, in MMIO space (must be 64-bit aligned) + * @count: number of 64-bit quantities to copy + * + * Copy data from MMIO space to kernel 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 __ioread64_copy(void *to, const void __iomem *from, size_t count) +{ +#ifdef CONFIG_64BIT + u64 *dst = to; + const u64 __iomem *src = from; + const u64 __iomem *end = src + count; + + while (src < end) + *dst++ = __raw_readq(src++); +#else + __ioread32_copy(to, from, count * 2); +#endif +} +EXPORT_SYMBOL_GPL(__ioread64_copy); -- cgit v1.2.3