1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#ifndef _ASM_IO_H
#define _ASM_IO_H
#include <linux/kernel.h>
#include <linux/types.h>
#include <asm/addrspace.h>
#include <asm/cpu.h>
#include <asm/page.h>
#include <asm/pgtable-bits.h>
#include <asm/string.h>
extern void __init __iomem *early_ioremap(u64 phys_addr, unsigned long size);
extern void __init early_iounmap(void __iomem *addr, unsigned long size);
#define early_memremap early_ioremap
#define early_memunmap early_iounmap
#ifdef CONFIG_ARCH_IOREMAP
static inline void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
unsigned long prot_val)
{
if (prot_val & _CACHE_CC)
return (void __iomem *)(unsigned long)(CACHE_BASE + offset);
else
return (void __iomem *)(unsigned long)(UNCACHE_BASE + offset);
}
#define ioremap(offset, size) \
ioremap_prot((offset), (size), pgprot_val(PAGE_KERNEL_SUC))
#define iounmap(addr) ((void)(addr))
#endif
/*
* On LoongArch, ioremap() has two variants, ioremap_wc() and ioremap_cache().
* They map bus memory into CPU space, the mapped memory is marked uncachable
* (_CACHE_SUC), uncachable but accelerated by write-combine (_CACHE_WUC) and
* cachable (_CACHE_CC) respectively for CPU access.
*
* @offset: bus address of the memory
* @size: size of the resource to map
*/
#define ioremap_wc(offset, size) \
ioremap_prot((offset), (size), \
pgprot_val(wc_enabled ? PAGE_KERNEL_WUC : PAGE_KERNEL_SUC))
#define ioremap_cache(offset, size) \
ioremap_prot((offset), (size), pgprot_val(PAGE_KERNEL))
#define mmiowb() wmb()
/*
* String version of I/O memory access operations.
*/
extern void __memset_io(volatile void __iomem *dst, int c, size_t count);
extern void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count);
extern void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count);
#define memset_io(c, v, l) __memset_io((c), (v), (l))
#define memcpy_fromio(a, c, l) __memcpy_fromio((a), (c), (l))
#define memcpy_toio(c, a, l) __memcpy_toio((c), (a), (l))
#define __io_aw() mmiowb()
#ifdef CONFIG_KFENCE
#define virt_to_phys(kaddr) \
({ \
(likely((unsigned long)kaddr < vm_map_base)) ? __pa((unsigned long)kaddr) : \
page_to_phys(tlb_virt_to_page((unsigned long)kaddr)) + offset_in_page((unsigned long)kaddr);\
})
#define phys_to_virt(paddr) \
({ \
extern char *__kfence_pool; \
(unlikely(__kfence_pool == NULL)) ? __va((unsigned long)paddr) : \
page_address(phys_to_page((unsigned long)paddr)) + offset_in_page((unsigned long)paddr);\
})
#endif
#include <asm-generic/io.h>
#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
extern int valid_phys_addr_range(phys_addr_t addr, size_t size);
extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
#endif /* _ASM_IO_H */
|
