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
virt_to_phys(volatile void * address)26 static 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
phys_to_virt(unsigned long address)44 static inline void *phys_to_virt(unsigned long address)
45 {
46 return __va(address);
47 }
48
49 extern 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
ioremap(unsigned long offset,unsigned long size)64 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
65 {
66 return __ioremap(offset, size, 0);
67 }
68
69 extern 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
82 extern unsigned char _inb(unsigned long);
83 extern unsigned short _inw(unsigned long);
84 extern unsigned long _inl(unsigned long);
85 extern unsigned char _inb_p(unsigned long);
86 extern unsigned short _inw_p(unsigned long);
87 extern unsigned long _inl_p(unsigned long);
88 extern void _outb(unsigned char, unsigned long);
89 extern void _outw(unsigned short, unsigned long);
90 extern void _outl(unsigned long, unsigned long);
91 extern void _outb_p(unsigned char, unsigned long);
92 extern void _outw_p(unsigned short, unsigned long);
93 extern void _outl_p(unsigned long, unsigned long);
94 extern void _insb(unsigned int, void *, unsigned long);
95 extern void _insw(unsigned int, void *, unsigned long);
96 extern void _insl(unsigned int, void *, unsigned long);
97 extern void _outsb(unsigned int, const void *, unsigned long);
98 extern void _outsw(unsigned int, const void *, unsigned long);
99 extern void _outsl(unsigned int, const void *, unsigned long);
100
_readb(unsigned long addr)101 static inline unsigned char _readb(unsigned long addr)
102 {
103 return *(volatile unsigned char __force *)addr;
104 }
105
_readw(unsigned long addr)106 static inline unsigned short _readw(unsigned long addr)
107 {
108 return *(volatile unsigned short __force *)addr;
109 }
110
_readl(unsigned long addr)111 static inline unsigned long _readl(unsigned long addr)
112 {
113 return *(volatile unsigned long __force *)addr;
114 }
115
_writeb(unsigned char b,unsigned long addr)116 static inline void _writeb(unsigned char b, unsigned long addr)
117 {
118 *(volatile unsigned char __force *)addr = b;
119 }
120
_writew(unsigned short w,unsigned long addr)121 static inline void _writew(unsigned short w, unsigned long addr)
122 {
123 *(volatile unsigned short __force *)addr = w;
124 }
125
_writel(unsigned long l,unsigned long addr)126 static 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
194 #define flush_write_buffers() do { } while (0) /* M32R_FIXME */
195
196 static inline void
memset_io(volatile void __iomem * addr,unsigned char val,int count)197 memset_io(volatile void __iomem *addr, unsigned char val, int count)
198 {
199 memset((void __force *) addr, val, count);
200 }
201
202 static inline void
memcpy_fromio(void * dst,volatile void __iomem * src,int count)203 memcpy_fromio(void *dst, volatile void __iomem *src, int count)
204 {
205 memcpy(dst, (void __force *) src, count);
206 }
207
208 static inline void
memcpy_toio(volatile void __iomem * dst,const void * src,int count)209 memcpy_toio(volatile void __iomem *dst, const void *src, int count)
210 {
211 memcpy((void __force *) dst, src, count);
212 }
213
214 /*
215 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
216 * access
217 */
218 #define xlate_dev_mem_ptr(p) __va(p)
219
220 /*
221 * Convert a virtual cached pointer to an uncached pointer
222 */
223 #define xlate_dev_kmem_ptr(p) p
224
225 #endif /* __KERNEL__ */
226
227 #endif /* _ASM_M32R_IO_H */
228