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- // 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));
- }
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