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 #define virt_to_bus virt_to_phys
11 #define bus_to_virt phys_to_virt
12
isa_bus_to_virt(unsigned long addr)13 static inline unsigned long isa_bus_to_virt(unsigned long addr) {
14 BUG();
15 return 0;
16 }
17
isa_virt_to_bus(void * addr)18 static inline unsigned long isa_virt_to_bus(void *addr) {
19 BUG();
20 return 0;
21 }
22
23 /*
24 * Memory mapped I/O
25 *
26 * readX()/writeX() do byteswapping and take an ioremapped address
27 * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
28 * gsc_*() don't byteswap and operate on physical addresses;
29 * eg dev->hpa or 0xfee00000.
30 */
31
gsc_readb(unsigned long addr)32 static inline unsigned char gsc_readb(unsigned long addr)
33 {
34 long flags;
35 unsigned char ret;
36
37 __asm__ __volatile__(
38 " rsm %3,%0\n"
39 " ldbx 0(%2),%1\n"
40 " mtsm %0\n"
41 : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
42
43 return ret;
44 }
45
gsc_readw(unsigned long addr)46 static inline unsigned short gsc_readw(unsigned long addr)
47 {
48 long flags;
49 unsigned short ret;
50
51 __asm__ __volatile__(
52 " rsm %3,%0\n"
53 " ldhx 0(%2),%1\n"
54 " mtsm %0\n"
55 : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
56
57 return ret;
58 }
59
gsc_readl(unsigned long addr)60 static inline unsigned int gsc_readl(unsigned long addr)
61 {
62 u32 ret;
63
64 __asm__ __volatile__(
65 " ldwax 0(%1),%0\n"
66 : "=r" (ret) : "r" (addr) );
67
68 return ret;
69 }
70
gsc_readq(unsigned long addr)71 static inline unsigned long long gsc_readq(unsigned long addr)
72 {
73 unsigned long long ret;
74
75 #ifdef CONFIG_64BIT
76 __asm__ __volatile__(
77 " ldda 0(%1),%0\n"
78 : "=r" (ret) : "r" (addr) );
79 #else
80 /* two reads may have side effects.. */
81 ret = ((u64) gsc_readl(addr)) << 32;
82 ret |= gsc_readl(addr+4);
83 #endif
84 return ret;
85 }
86
gsc_writeb(unsigned char val,unsigned long addr)87 static inline void gsc_writeb(unsigned char val, unsigned long addr)
88 {
89 long flags;
90 __asm__ __volatile__(
91 " rsm %3,%0\n"
92 " stbs %1,0(%2)\n"
93 " mtsm %0\n"
94 : "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) );
95 }
96
gsc_writew(unsigned short val,unsigned long addr)97 static inline void gsc_writew(unsigned short val, unsigned long addr)
98 {
99 long flags;
100 __asm__ __volatile__(
101 " rsm %3,%0\n"
102 " sths %1,0(%2)\n"
103 " mtsm %0\n"
104 : "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) );
105 }
106
gsc_writel(unsigned int val,unsigned long addr)107 static inline void gsc_writel(unsigned int val, unsigned long addr)
108 {
109 __asm__ __volatile__(
110 " stwas %0,0(%1)\n"
111 : : "r" (val), "r" (addr) );
112 }
113
gsc_writeq(unsigned long long val,unsigned long addr)114 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
115 {
116 #ifdef CONFIG_64BIT
117 __asm__ __volatile__(
118 " stda %0,0(%1)\n"
119 : : "r" (val), "r" (addr) );
120 #else
121 /* two writes may have side effects.. */
122 gsc_writel(val >> 32, addr);
123 gsc_writel(val, addr+4);
124 #endif
125 }
126
127 /*
128 * The standard PCI ioremap interfaces
129 */
130 void __iomem *ioremap(unsigned long offset, unsigned long size);
131 #define ioremap_wc ioremap
132 #define ioremap_uc ioremap
133
134 extern void iounmap(const volatile void __iomem *addr);
135
__raw_readb(const volatile void __iomem * addr)136 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
137 {
138 return (*(volatile unsigned char __force *) (addr));
139 }
__raw_readw(const volatile void __iomem * addr)140 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
141 {
142 return *(volatile unsigned short __force *) addr;
143 }
__raw_readl(const volatile void __iomem * addr)144 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
145 {
146 return *(volatile unsigned int __force *) addr;
147 }
__raw_readq(const volatile void __iomem * addr)148 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
149 {
150 return *(volatile unsigned long long __force *) addr;
151 }
152
__raw_writeb(unsigned char b,volatile void __iomem * addr)153 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
154 {
155 *(volatile unsigned char __force *) addr = b;
156 }
__raw_writew(unsigned short b,volatile void __iomem * addr)157 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
158 {
159 *(volatile unsigned short __force *) addr = b;
160 }
__raw_writel(unsigned int b,volatile void __iomem * addr)161 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
162 {
163 *(volatile unsigned int __force *) addr = b;
164 }
__raw_writeq(unsigned long long b,volatile void __iomem * addr)165 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
166 {
167 *(volatile unsigned long long __force *) addr = b;
168 }
169
readb(const volatile void __iomem * addr)170 static inline unsigned char readb(const volatile void __iomem *addr)
171 {
172 return __raw_readb(addr);
173 }
readw(const volatile void __iomem * addr)174 static inline unsigned short readw(const volatile void __iomem *addr)
175 {
176 return le16_to_cpu((__le16 __force) __raw_readw(addr));
177 }
readl(const volatile void __iomem * addr)178 static inline unsigned int readl(const volatile void __iomem *addr)
179 {
180 return le32_to_cpu((__le32 __force) __raw_readl(addr));
181 }
readq(const volatile void __iomem * addr)182 static inline unsigned long long readq(const volatile void __iomem *addr)
183 {
184 return le64_to_cpu((__le64 __force) __raw_readq(addr));
185 }
186
writeb(unsigned char b,volatile void __iomem * addr)187 static inline void writeb(unsigned char b, volatile void __iomem *addr)
188 {
189 __raw_writeb(b, addr);
190 }
writew(unsigned short w,volatile void __iomem * addr)191 static inline void writew(unsigned short w, volatile void __iomem *addr)
192 {
193 __raw_writew((__u16 __force) cpu_to_le16(w), addr);
194 }
writel(unsigned int l,volatile void __iomem * addr)195 static inline void writel(unsigned int l, volatile void __iomem *addr)
196 {
197 __raw_writel((__u32 __force) cpu_to_le32(l), addr);
198 }
writeq(unsigned long long q,volatile void __iomem * addr)199 static inline void writeq(unsigned long long q, volatile void __iomem *addr)
200 {
201 __raw_writeq((__u64 __force) cpu_to_le64(q), addr);
202 }
203
204 #define readb readb
205 #define readw readw
206 #define readl readl
207 #define readq readq
208 #define writeb writeb
209 #define writew writew
210 #define writel writel
211 #define writeq writeq
212
213 #define readb_relaxed(addr) readb(addr)
214 #define readw_relaxed(addr) readw(addr)
215 #define readl_relaxed(addr) readl(addr)
216 #define readq_relaxed(addr) readq(addr)
217 #define writeb_relaxed(b, addr) writeb(b, addr)
218 #define writew_relaxed(w, addr) writew(w, addr)
219 #define writel_relaxed(l, addr) writel(l, addr)
220 #define writeq_relaxed(q, addr) writeq(q, addr)
221
222 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
223 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
224 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
225
226 /* Port-space IO */
227
228 #define inb_p inb
229 #define inw_p inw
230 #define inl_p inl
231 #define outb_p outb
232 #define outw_p outw
233 #define outl_p outl
234
235 extern unsigned char eisa_in8(unsigned short port);
236 extern unsigned short eisa_in16(unsigned short port);
237 extern unsigned int eisa_in32(unsigned short port);
238 extern void eisa_out8(unsigned char data, unsigned short port);
239 extern void eisa_out16(unsigned short data, unsigned short port);
240 extern void eisa_out32(unsigned int data, unsigned short port);
241
242 #if defined(CONFIG_PCI)
243 extern unsigned char inb(int addr);
244 extern unsigned short inw(int addr);
245 extern unsigned int inl(int addr);
246
247 extern void outb(unsigned char b, int addr);
248 extern void outw(unsigned short b, int addr);
249 extern void outl(unsigned int b, int addr);
250 #elif defined(CONFIG_EISA)
251 #define inb eisa_in8
252 #define inw eisa_in16
253 #define inl eisa_in32
254 #define outb eisa_out8
255 #define outw eisa_out16
256 #define outl eisa_out32
257 #else
inb(unsigned long addr)258 static inline char inb(unsigned long addr)
259 {
260 BUG();
261 return -1;
262 }
263
inw(unsigned long addr)264 static inline short inw(unsigned long addr)
265 {
266 BUG();
267 return -1;
268 }
269
inl(unsigned long addr)270 static inline int inl(unsigned long addr)
271 {
272 BUG();
273 return -1;
274 }
275
276 #define outb(x, y) BUG()
277 #define outw(x, y) BUG()
278 #define outl(x, y) BUG()
279 #endif
280
281 /*
282 * String versions of in/out ops:
283 */
284 extern void insb (unsigned long port, void *dst, unsigned long count);
285 extern void insw (unsigned long port, void *dst, unsigned long count);
286 extern void insl (unsigned long port, void *dst, unsigned long count);
287 extern void outsb (unsigned long port, const void *src, unsigned long count);
288 extern void outsw (unsigned long port, const void *src, unsigned long count);
289 extern void outsl (unsigned long port, const void *src, unsigned long count);
290
291
292 /* IO Port space is : BBiiii where BB is HBA number. */
293 #define IO_SPACE_LIMIT 0x00ffffff
294
295 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
296 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
297 * mode (essentially just sign extending. This macro takes in a 32
298 * bit I/O address (still with the leading f) and outputs the correct
299 * value for either 32 or 64 bit mode */
300 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
301
302 #define ioread64 ioread64
303 #define ioread64be ioread64be
304 #define iowrite64 iowrite64
305 #define iowrite64be iowrite64be
306 extern u64 ioread64(const void __iomem *addr);
307 extern u64 ioread64be(const void __iomem *addr);
308 extern void iowrite64(u64 val, void __iomem *addr);
309 extern void iowrite64be(u64 val, void __iomem *addr);
310
311 #include <asm-generic/iomap.h>
312
313 /*
314 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
315 * access
316 */
317 #define xlate_dev_mem_ptr(p) __va(p)
318
319 extern int devmem_is_allowed(unsigned long pfn);
320
321 #endif
322