1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_IO_H
3 #define _ASM_IO_H
4
5 #include <linux/types.h>
6 #include <linux/pgtable.h>
7
8 #define virt_to_phys(a) ((unsigned long)__pa(a))
9 #define phys_to_virt(a) __va(a)
10
isa_bus_to_virt(unsigned long addr)11 static inline unsigned long isa_bus_to_virt(unsigned long addr) {
12 BUG();
13 return 0;
14 }
15
isa_virt_to_bus(void * addr)16 static inline unsigned long isa_virt_to_bus(void *addr) {
17 BUG();
18 return 0;
19 }
20
21 /*
22 * Memory mapped I/O
23 *
24 * readX()/writeX() do byteswapping and take an ioremapped address
25 * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
26 * gsc_*() don't byteswap and operate on physical addresses;
27 * eg dev->hpa or 0xfee00000.
28 */
29
gsc_readb(unsigned long addr)30 static inline unsigned char gsc_readb(unsigned long addr)
31 {
32 long flags;
33 unsigned char ret;
34
35 __asm__ __volatile__(
36 " rsm %3,%0\n"
37 " ldbx 0(%2),%1\n"
38 " mtsm %0\n"
39 : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
40
41 return ret;
42 }
43
gsc_readw(unsigned long addr)44 static inline unsigned short gsc_readw(unsigned long addr)
45 {
46 long flags;
47 unsigned short ret;
48
49 __asm__ __volatile__(
50 " rsm %3,%0\n"
51 " ldhx 0(%2),%1\n"
52 " mtsm %0\n"
53 : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
54
55 return ret;
56 }
57
gsc_readl(unsigned long addr)58 static inline unsigned int gsc_readl(unsigned long addr)
59 {
60 u32 ret;
61
62 __asm__ __volatile__(
63 " ldwax 0(%1),%0\n"
64 : "=r" (ret) : "r" (addr) );
65
66 return ret;
67 }
68
gsc_readq(unsigned long addr)69 static inline unsigned long long gsc_readq(unsigned long addr)
70 {
71 unsigned long long ret;
72
73 #ifdef CONFIG_64BIT
74 __asm__ __volatile__(
75 " ldda 0(%1),%0\n"
76 : "=r" (ret) : "r" (addr) );
77 #else
78 /* two reads may have side effects.. */
79 ret = ((u64) gsc_readl(addr)) << 32;
80 ret |= gsc_readl(addr+4);
81 #endif
82 return ret;
83 }
84
gsc_writeb(unsigned char val,unsigned long addr)85 static inline void gsc_writeb(unsigned char val, unsigned long addr)
86 {
87 long flags;
88 __asm__ __volatile__(
89 " rsm %3,%0\n"
90 " stbs %1,0(%2)\n"
91 " mtsm %0\n"
92 : "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) );
93 }
94
gsc_writew(unsigned short val,unsigned long addr)95 static inline void gsc_writew(unsigned short val, unsigned long addr)
96 {
97 long flags;
98 __asm__ __volatile__(
99 " rsm %3,%0\n"
100 " sths %1,0(%2)\n"
101 " mtsm %0\n"
102 : "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) );
103 }
104
gsc_writel(unsigned int val,unsigned long addr)105 static inline void gsc_writel(unsigned int val, unsigned long addr)
106 {
107 __asm__ __volatile__(
108 " stwas %0,0(%1)\n"
109 : : "r" (val), "r" (addr) );
110 }
111
gsc_writeq(unsigned long long val,unsigned long addr)112 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
113 {
114 #ifdef CONFIG_64BIT
115 __asm__ __volatile__(
116 " stda %0,0(%1)\n"
117 : : "r" (val), "r" (addr) );
118 #else
119 /* two writes may have side effects.. */
120 gsc_writel(val >> 32, addr);
121 gsc_writel(val, addr+4);
122 #endif
123 }
124
125 /*
126 * The standard PCI ioremap interfaces
127 */
128 #define ioremap_prot ioremap_prot
129
130 #define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \
131 _PAGE_ACCESSED | _PAGE_NO_CACHE)
132
133 #define ioremap_wc(addr, size) \
134 ioremap_prot((addr), (size), _PAGE_IOREMAP)
135 #define ioremap_uc(addr, size) \
136 ioremap_prot((addr), (size), _PAGE_IOREMAP)
137
138 #define pci_iounmap pci_iounmap
139
140 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
141 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
142 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
143 #define memset_io memset_io
144 #define memcpy_fromio memcpy_fromio
145 #define memcpy_toio memcpy_toio
146
147 /* Port-space IO */
148
149 #define inb_p inb
150 #define inw_p inw
151 #define inl_p inl
152 #define outb_p outb
153 #define outw_p outw
154 #define outl_p outl
155
156 extern unsigned char eisa_in8(unsigned short port);
157 extern unsigned short eisa_in16(unsigned short port);
158 extern unsigned int eisa_in32(unsigned short port);
159 extern void eisa_out8(unsigned char data, unsigned short port);
160 extern void eisa_out16(unsigned short data, unsigned short port);
161 extern void eisa_out32(unsigned int data, unsigned short port);
162
163 #if defined(CONFIG_PCI)
164 extern unsigned char inb(int addr);
165 extern unsigned short inw(int addr);
166 extern unsigned int inl(int addr);
167 extern void outb(unsigned char b, int addr);
168 extern void outw(unsigned short b, int addr);
169 extern void outl(unsigned int b, int addr);
170 #define inb inb
171 #define inw inw
172 #define inl inl
173 #define outb outb
174 #define outw outw
175 #define outl outl
176 #elif defined(CONFIG_EISA)
177 #define inb eisa_in8
178 #define inw eisa_in16
179 #define inl eisa_in32
180 #define outb eisa_out8
181 #define outw eisa_out16
182 #define outl eisa_out32
183 #else
inb(unsigned long addr)184 static inline char inb(unsigned long addr)
185 {
186 BUG();
187 return -1;
188 }
189
inw(unsigned long addr)190 static inline short inw(unsigned long addr)
191 {
192 BUG();
193 return -1;
194 }
195
inl(unsigned long addr)196 static inline int inl(unsigned long addr)
197 {
198 BUG();
199 return -1;
200 }
201 #define inb inb
202 #define inw inw
203 #define inl inl
204 #define outb(x, y) ({(void)(x); (void)(y); BUG(); 0;})
205 #define outw(x, y) ({(void)(x); (void)(y); BUG(); 0;})
206 #define outl(x, y) ({(void)(x); (void)(y); BUG(); 0;})
207 #endif
208
209 /*
210 * String versions of in/out ops:
211 */
212 extern void insb (unsigned long port, void *dst, unsigned long count);
213 extern void insw (unsigned long port, void *dst, unsigned long count);
214 extern void insl (unsigned long port, void *dst, unsigned long count);
215 extern void outsb (unsigned long port, const void *src, unsigned long count);
216 extern void outsw (unsigned long port, const void *src, unsigned long count);
217 extern void outsl (unsigned long port, const void *src, unsigned long count);
218 #define insb insb
219 #define insw insw
220 #define insl insl
221 #define outsb outsb
222 #define outsw outsw
223 #define outsl outsl
224
225 /* IO Port space is : BBiiii where BB is HBA number. */
226 #define IO_SPACE_LIMIT 0x00ffffff
227
228 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
229 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
230 * mode (essentially just sign extending. This macro takes in a 32
231 * bit I/O address (still with the leading f) and outputs the correct
232 * value for either 32 or 64 bit mode */
233 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
234
235 #ifdef CONFIG_64BIT
236 #define ioread64 ioread64
237 #define ioread64be ioread64be
238 #define iowrite64 iowrite64
239 #define iowrite64be iowrite64be
240 extern u64 ioread64(const void __iomem *addr);
241 extern u64 ioread64be(const void __iomem *addr);
242 extern void iowrite64(u64 val, void __iomem *addr);
243 extern void iowrite64be(u64 val, void __iomem *addr);
244 #endif
245
246 #include <asm-generic/iomap.h>
247 /*
248 * These get provided from <asm-generic/iomap.h> since parisc does not
249 * select GENERIC_IOMAP.
250 */
251 #define ioport_map ioport_map
252 #define ioport_unmap ioport_unmap
253 #define ioread8 ioread8
254 #define ioread16 ioread16
255 #define ioread32 ioread32
256 #define ioread16be ioread16be
257 #define ioread32be ioread32be
258 #define iowrite8 iowrite8
259 #define iowrite16 iowrite16
260 #define iowrite32 iowrite32
261 #define iowrite16be iowrite16be
262 #define iowrite32be iowrite32be
263 #define ioread8_rep ioread8_rep
264 #define ioread16_rep ioread16_rep
265 #define ioread32_rep ioread32_rep
266 #define iowrite8_rep iowrite8_rep
267 #define iowrite16_rep iowrite16_rep
268 #define iowrite32_rep iowrite32_rep
269
270 /*
271 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
272 * access
273 */
274 #define xlate_dev_mem_ptr(p) __va(p)
275
276 extern int devmem_is_allowed(unsigned long pfn);
277
278 #include <asm-generic/io.h>
279
280 #endif
281