tjh.dev
Linux kernel mirror (for testing)
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_M32R_IO_H
3#define _ASM_M32R_IO_H
4
5#include <linux/string.h>
6#include <linux/compiler.h>
7#include <asm/page.h> /* __va */
8
9#ifdef __KERNEL__
10
11#define IO_SPACE_LIMIT 0xFFFFFFFF
12
13/**
14 * virt_to_phys - map virtual addresses to physical
15 * @address: address to remap
16 *
17 * The returned physical address is the physical (CPU) mapping for
18 * the memory address given. It is only valid to use this function on
19 * addresses directly mapped or allocated via kmalloc.
20 *
21 * This function does not give bus mappings for DMA transfers. In
22 * almost all conceivable cases a device driver should not be using
23 * this function
24 */
25
26static inline unsigned long virt_to_phys(volatile void * address)
27{
28 return __pa(address);
29}
30
31/**
32 * phys_to_virt - map physical address to virtual
33 * @address: address to remap
34 *
35 * The returned virtual address is a current CPU mapping for
36 * the memory address given. It is only valid to use this function on
37 * addresses that have a kernel mapping
38 *
39 * This function does not handle bus mappings for DMA transfers. In
40 * almost all conceivable cases a device driver should not be using
41 * this function
42 */
43
44static inline void *phys_to_virt(unsigned long address)
45{
46 return __va(address);
47}
48
49extern void __iomem *
50__ioremap(unsigned long offset, unsigned long size, unsigned long flags);
51
52/**
53 * ioremap - map bus memory into CPU space
54 * @offset: bus address of the memory
55 * @size: size of the resource to map
56 *
57 * ioremap performs a platform specific sequence of operations to
58 * make bus memory CPU accessible via the readb/readw/readl/writeb/
59 * writew/writel functions and the other mmio helpers. The returned
60 * address is not guaranteed to be usable directly as a virtual
61 * address.
62 */
63
64static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
65{
66 return __ioremap(offset, size, 0);
67}
68
69extern void iounmap(volatile void __iomem *addr);
70#define ioremap_nocache(off,size) ioremap(off,size)
71#define ioremap_wc ioremap_nocache
72#define ioremap_wt ioremap_nocache
73#define ioremap_uc ioremap_nocache
74
75/*
76 * IO bus memory addresses are also 1:1 with the physical address
77 */
78#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
79#define page_to_bus page_to_phys
80#define virt_to_bus virt_to_phys
81
82extern unsigned char _inb(unsigned long);
83extern unsigned short _inw(unsigned long);
84extern unsigned long _inl(unsigned long);
85extern unsigned char _inb_p(unsigned long);
86extern unsigned short _inw_p(unsigned long);
87extern unsigned long _inl_p(unsigned long);
88extern void _outb(unsigned char, unsigned long);
89extern void _outw(unsigned short, unsigned long);
90extern void _outl(unsigned long, unsigned long);
91extern void _outb_p(unsigned char, unsigned long);
92extern void _outw_p(unsigned short, unsigned long);
93extern void _outl_p(unsigned long, unsigned long);
94extern void _insb(unsigned int, void *, unsigned long);
95extern void _insw(unsigned int, void *, unsigned long);
96extern void _insl(unsigned int, void *, unsigned long);
97extern void _outsb(unsigned int, const void *, unsigned long);
98extern void _outsw(unsigned int, const void *, unsigned long);
99extern void _outsl(unsigned int, const void *, unsigned long);
100
101static inline unsigned char _readb(unsigned long addr)
102{
103 return *(volatile unsigned char __force *)addr;
104}
105
106static inline unsigned short _readw(unsigned long addr)
107{
108 return *(volatile unsigned short __force *)addr;
109}
110
111static inline unsigned long _readl(unsigned long addr)
112{
113 return *(volatile unsigned long __force *)addr;
114}
115
116static inline void _writeb(unsigned char b, unsigned long addr)
117{
118 *(volatile unsigned char __force *)addr = b;
119}
120
121static inline void _writew(unsigned short w, unsigned long addr)
122{
123 *(volatile unsigned short __force *)addr = w;
124}
125
126static inline void _writel(unsigned long l, unsigned long addr)
127{
128 *(volatile unsigned long __force *)addr = l;
129}
130
131#define inb _inb
132#define inw _inw
133#define inl _inl
134#define outb _outb
135#define outw _outw
136#define outl _outl
137
138#define inb_p _inb_p
139#define inw_p _inw_p
140#define inl_p _inl_p
141#define outb_p _outb_p
142#define outw_p _outw_p
143#define outl_p _outl_p
144
145#define insb _insb
146#define insw _insw
147#define insl _insl
148#define outsb _outsb
149#define outsw _outsw
150#define outsl _outsl
151
152#define readb(addr) _readb((unsigned long)(addr))
153#define readw(addr) _readw((unsigned long)(addr))
154#define readl(addr) _readl((unsigned long)(addr))
155#define __raw_readb readb
156#define __raw_readw readw
157#define __raw_readl readl
158#define readb_relaxed readb
159#define readw_relaxed readw
160#define readl_relaxed readl
161
162#define writeb(val, addr) _writeb((val), (unsigned long)(addr))
163#define writew(val, addr) _writew((val), (unsigned long)(addr))
164#define writel(val, addr) _writel((val), (unsigned long)(addr))
165#define __raw_writeb writeb
166#define __raw_writew writew
167#define __raw_writel writel
168#define writeb_relaxed writeb
169#define writew_relaxed writew
170#define writel_relaxed writel
171
172#define ioread8 readb
173#define ioread16 readw
174#define ioread32 readl
175#define iowrite8 writeb
176#define iowrite16 writew
177#define iowrite32 writel
178
179#define ioread8_rep(p, dst, count) insb((unsigned long)(p), (dst), (count))
180#define ioread16_rep(p, dst, count) insw((unsigned long)(p), (dst), (count))
181#define ioread32_rep(p, dst, count) insl((unsigned long)(p), (dst), (count))
182
183#define iowrite8_rep(p, src, count) outsb((unsigned long)(p), (src), (count))
184#define iowrite16_rep(p, src, count) outsw((unsigned long)(p), (src), (count))
185#define iowrite32_rep(p, src, count) outsl((unsigned long)(p), (src), (count))
186
187#define ioread16be(addr) be16_to_cpu(readw(addr))
188#define ioread32be(addr) be32_to_cpu(readl(addr))
189#define iowrite16be(v, addr) writew(cpu_to_be16(v), (addr))
190#define iowrite32be(v, addr) writel(cpu_to_be32(v), (addr))
191
192#define mmiowb()
193
194static inline void
195memset_io(volatile void __iomem *addr, unsigned char val, int count)
196{
197 memset((void __force *) addr, val, count);
198}
199
200static inline void
201memcpy_fromio(void *dst, volatile void __iomem *src, int count)
202{
203 memcpy(dst, (void __force *) src, count);
204}
205
206static inline void
207memcpy_toio(volatile void __iomem *dst, const void *src, int count)
208{
209 memcpy((void __force *) dst, src, count);
210}
211
212/*
213 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
214 * access
215 */
216#define xlate_dev_mem_ptr(p) __va(p)
217
218/*
219 * Convert a virtual cached pointer to an uncached pointer
220 */
221#define xlate_dev_kmem_ptr(p) p
222
223#endif /* __KERNEL__ */
224
225#endif /* _ASM_M32R_IO_H */