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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_nocache(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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