1 // SPDX-License-Identifier: GPL-2.0-or-later
2
3 #include <linux/io.h>
4 #include <linux/slab.h>
5 #include <linux/mmzone.h>
6 #include <linux/vmalloc.h>
7
8 unsigned long ioremap_bot;
9 EXPORT_SYMBOL(ioremap_bot);
10
ioremap(phys_addr_t addr,unsigned long size)11 void __iomem *ioremap(phys_addr_t addr, unsigned long size)
12 {
13 pgprot_t prot = pgprot_noncached(PAGE_KERNEL);
14 void *caller = __builtin_return_address(0);
15
16 return __ioremap_caller(addr, size, prot, caller);
17 }
18 EXPORT_SYMBOL(ioremap);
19
ioremap_wc(phys_addr_t addr,unsigned long size)20 void __iomem *ioremap_wc(phys_addr_t addr, unsigned long size)
21 {
22 pgprot_t prot = pgprot_noncached_wc(PAGE_KERNEL);
23 void *caller = __builtin_return_address(0);
24
25 return __ioremap_caller(addr, size, prot, caller);
26 }
27 EXPORT_SYMBOL(ioremap_wc);
28
ioremap_coherent(phys_addr_t addr,unsigned long size)29 void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size)
30 {
31 pgprot_t prot = pgprot_cached(PAGE_KERNEL);
32 void *caller = __builtin_return_address(0);
33
34 return __ioremap_caller(addr, size, prot, caller);
35 }
36
ioremap_prot(phys_addr_t addr,size_t size,pgprot_t prot)37 void __iomem *ioremap_prot(phys_addr_t addr, size_t size, pgprot_t prot)
38 {
39 pte_t pte = __pte(pgprot_val(prot));
40 void *caller = __builtin_return_address(0);
41
42 /* writeable implies dirty for kernel addresses */
43 if (pte_write(pte))
44 pte = pte_mkdirty(pte);
45
46 return __ioremap_caller(addr, size, pte_pgprot(pte), caller);
47 }
48 EXPORT_SYMBOL(ioremap_prot);
49
early_ioremap_range(unsigned long ea,phys_addr_t pa,unsigned long size,pgprot_t prot)50 int early_ioremap_range(unsigned long ea, phys_addr_t pa,
51 unsigned long size, pgprot_t prot)
52 {
53 unsigned long i;
54
55 for (i = 0; i < size; i += PAGE_SIZE) {
56 int err = map_kernel_page(ea + i, pa + i, pgprot_nx(prot));
57
58 if (WARN_ON_ONCE(err)) /* Should clean up */
59 return err;
60 }
61
62 return 0;
63 }
64