Merge tag 'linux-kselftest-kunit-fixes-5.11-rc3' of git://git.kernel.org/pub/scm...
[linux/fpc-iii.git] / arch / xtensa / mm / ioremap.c
bloba400188c16b90650e65f920d8a03840e1b72535b
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ioremap implementation.
5 * Copyright (C) 2015 Cadence Design Systems Inc.
6 */
8 #include <linux/io.h>
9 #include <linux/vmalloc.h>
10 #include <linux/pgtable.h>
11 #include <asm/cacheflush.h>
12 #include <asm/io.h>
14 static void __iomem *xtensa_ioremap(unsigned long paddr, unsigned long size,
15 pgprot_t prot)
17 unsigned long offset = paddr & ~PAGE_MASK;
18 unsigned long pfn = __phys_to_pfn(paddr);
19 struct vm_struct *area;
20 unsigned long vaddr;
21 int err;
23 paddr &= PAGE_MASK;
25 WARN_ON(pfn_valid(pfn));
27 size = PAGE_ALIGN(offset + size);
29 area = get_vm_area(size, VM_IOREMAP);
30 if (!area)
31 return NULL;
33 vaddr = (unsigned long)area->addr;
34 area->phys_addr = paddr;
36 err = ioremap_page_range(vaddr, vaddr + size, paddr, prot);
38 if (err) {
39 vunmap((void *)vaddr);
40 return NULL;
43 flush_cache_vmap(vaddr, vaddr + size);
44 return (void __iomem *)(offset + vaddr);
47 void __iomem *xtensa_ioremap_nocache(unsigned long addr, unsigned long size)
49 return xtensa_ioremap(addr, size, pgprot_noncached(PAGE_KERNEL));
51 EXPORT_SYMBOL(xtensa_ioremap_nocache);
53 void __iomem *xtensa_ioremap_cache(unsigned long addr, unsigned long size)
55 return xtensa_ioremap(addr, size, PAGE_KERNEL);
57 EXPORT_SYMBOL(xtensa_ioremap_cache);
59 void xtensa_iounmap(volatile void __iomem *io_addr)
61 void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr);
63 vunmap(addr);
65 EXPORT_SYMBOL(xtensa_iounmap);