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
11static inline unsigned long isa_bus_to_virt(unsigned long addr) {
12	BUG();
13	return 0;
14}
15
16static 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
30static 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
44static 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
58static 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
69static 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
85static 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
95static 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
105static 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
112static 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
136#define pci_iounmap			pci_iounmap
137
138void memset_io(volatile void __iomem *addr, unsigned char val, int count);
139void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
140void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
141#define memset_io memset_io
142#define memcpy_fromio memcpy_fromio
143#define memcpy_toio memcpy_toio
144
145/* Port-space IO */
146
147#define inb_p inb
148#define inw_p inw
149#define inl_p inl
150#define outb_p outb
151#define outw_p outw
152#define outl_p outl
153
154extern unsigned char eisa_in8(unsigned short port);
155extern unsigned short eisa_in16(unsigned short port);
156extern unsigned int eisa_in32(unsigned short port);
157extern void eisa_out8(unsigned char data, unsigned short port);
158extern void eisa_out16(unsigned short data, unsigned short port);
159extern void eisa_out32(unsigned int data, unsigned short port);
160
161#if defined(CONFIG_PCI)
162extern unsigned char inb(int addr);
163extern unsigned short inw(int addr);
164extern unsigned int inl(int addr);
165extern void outb(unsigned char b, int addr);
166extern void outw(unsigned short b, int addr);
167extern void outl(unsigned int b, int addr);
168#define inb inb
169#define inw inw
170#define inl inl
171#define outb outb
172#define outw outw
173#define outl outl
174#elif defined(CONFIG_EISA)
175#define inb eisa_in8
176#define inw eisa_in16
177#define inl eisa_in32
178#define outb eisa_out8
179#define outw eisa_out16
180#define outl eisa_out32
181#else
182static inline char inb(unsigned long addr)
183{
184	BUG();
185	return -1;
186}
187
188static inline short inw(unsigned long addr)
189{
190	BUG();
191	return -1;
192}
193
194static inline int inl(unsigned long addr)
195{
196	BUG();
197	return -1;
198}
199#define inb inb
200#define inw inw
201#define inl inl
202#define outb(x, y)	({(void)(x); (void)(y); BUG(); 0;})
203#define outw(x, y)	({(void)(x); (void)(y); BUG(); 0;})
204#define outl(x, y)	({(void)(x); (void)(y); BUG(); 0;})
205#endif
206
207/*
208 * String versions of in/out ops:
209 */
210extern void insb (unsigned long port, void *dst, unsigned long count);
211extern void insw (unsigned long port, void *dst, unsigned long count);
212extern void insl (unsigned long port, void *dst, unsigned long count);
213extern void outsb (unsigned long port, const void *src, unsigned long count);
214extern void outsw (unsigned long port, const void *src, unsigned long count);
215extern void outsl (unsigned long port, const void *src, unsigned long count);
216#define insb insb
217#define insw insw
218#define insl insl
219#define outsb outsb
220#define outsw outsw
221#define outsl outsl
222
223/* IO Port space is :      BBiiii   where BB is HBA number. */
224#define IO_SPACE_LIMIT 0x00ffffff
225
226/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
227 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
228 * mode (essentially just sign extending.  This macro takes in a 32
229 * bit I/O address (still with the leading f) and outputs the correct
230 * value for either 32 or 64 bit mode */
231#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
232
233#ifdef CONFIG_64BIT
234#define ioread64 ioread64
235#define ioread64be ioread64be
236#define iowrite64 iowrite64
237#define iowrite64be iowrite64be
238extern u64 ioread64(const void __iomem *addr);
239extern u64 ioread64be(const void __iomem *addr);
240extern void iowrite64(u64 val, void __iomem *addr);
241extern void iowrite64be(u64 val, void __iomem *addr);
242#endif
243
244#include <asm-generic/iomap.h>
245/*
246 * These get provided from <asm-generic/iomap.h> since parisc does not
247 * select GENERIC_IOMAP.
248 */
249#define ioport_map ioport_map
250#define ioport_unmap ioport_unmap
251#define ioread8 ioread8
252#define ioread16 ioread16
253#define ioread32 ioread32
254#define ioread16be ioread16be
255#define ioread32be ioread32be
256#define iowrite8 iowrite8
257#define iowrite16 iowrite16
258#define iowrite32 iowrite32
259#define iowrite16be iowrite16be
260#define iowrite32be iowrite32be
261#define ioread8_rep ioread8_rep
262#define ioread16_rep ioread16_rep
263#define ioread32_rep ioread32_rep
264#define iowrite8_rep iowrite8_rep
265#define iowrite16_rep iowrite16_rep
266#define iowrite32_rep iowrite32_rep
267
268extern int devmem_is_allowed(unsigned long pfn);
269
270#include <asm-generic/io.h>
271
272#endif
273