// SPDX-License-Identifier: GPL-2.0-only /* * I/O remap functions for Hexagon * * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. */ #include <linux/io.h> #include <linux/vmalloc.h> #include <linux/mm.h> 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)); }