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/hexagon/mm/ioremap.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 arch/hexagon/mm/ioremap.c (limited to 'arch/hexagon/mm/ioremap.c') diff --git a/arch/hexagon/mm/ioremap.c b/arch/hexagon/mm/ioremap.c new file mode 100644 index 000000000..255c5b1ee --- /dev/null +++ b/arch/hexagon/mm/ioremap.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * I/O remap functions for Hexagon + * + * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include + +void __iomem *ioremap(unsigned long phys_addr, unsigned long size) +{ + unsigned long last_addr, addr; + unsigned long offset = phys_addr & ~PAGE_MASK; + struct vm_struct *area; + + pgprot_t prot = __pgprot(_PAGE_PRESENT|_PAGE_READ|_PAGE_WRITE + |(__HEXAGON_C_DEV << 6)); + + last_addr = phys_addr + size - 1; + + /* Wrapping not allowed */ + if (!size || (last_addr < phys_addr)) + return NULL; + + /* Rounds up to next page size, including whole-page offset */ + size = PAGE_ALIGN(offset + size); + + area = get_vm_area(size, VM_IOREMAP); + addr = (unsigned long)area->addr; + + if (ioremap_page_range(addr, addr+size, phys_addr, prot)) { + vunmap((void *)addr); + return NULL; + } + + return (void __iomem *) (offset + addr); +} + +void iounmap(const volatile void __iomem *addr) +{ + vunmap((void *) ((unsigned long) addr & PAGE_MASK)); +} -- cgit v1.2.3