1/*
2 * $Id: io.h,v 1.1.1.1 2008/10/15 03:29:17 james26_jang Exp $
3 */
4#ifndef __SPARC_IO_H
5#define __SPARC_IO_H
6
7#include <linux/kernel.h>
8#include <linux/types.h>
9#include <linux/ioport.h>  /* struct resource */
10
11#include <asm/page.h>      /* IO address mapping routines need this */
12#include <asm/system.h>
13
14#define virt_to_bus virt_to_phys
15#define bus_to_virt phys_to_virt
16#define page_to_phys(page)     ((((page) - mem_map) << PAGE_SHIFT)+phys_base)
17
18static __inline__ u32 flip_dword (u32 d)
19{
20	return ((d&0xff)<<24) | (((d>>8)&0xff)<<16) | (((d>>16)&0xff)<<8)| ((d>>24)&0xff);
21}
22
23static __inline__ u16 flip_word (u16 d)
24{
25	return ((d&0xff) << 8) | ((d>>8)&0xff);
26}
27
28/*
29 * Memory mapped I/O to PCI
30 */
31static __inline__ u8 readb(unsigned long addr)
32{
33	return *(volatile u8 *)addr;
34}
35
36static __inline__ u16 readw(unsigned long addr)
37{
38	return flip_word(*(volatile u16 *)addr);
39}
40
41static __inline__ u32 readl(unsigned long addr)
42{
43	return flip_dword(*(volatile u32 *)addr);
44}
45
46static __inline__ void writeb(u8 b, unsigned long addr)
47{
48	*(volatile u8 *)addr = b;
49}
50
51static __inline__ void writew(u16 b, unsigned long addr)
52{
53	*(volatile u16 *)addr = flip_word(b);
54}
55
56static __inline__ void writel(u32 b, unsigned long addr)
57{
58	*(volatile u32 *)addr = flip_dword(b);
59}
60
61/* Now the 'raw' versions. */
62static __inline__ u8 __raw_readb(unsigned long addr)
63{
64	return *(volatile u8 *)addr;
65}
66
67static __inline__ u16 __raw_readw(unsigned long addr)
68{
69	return *(volatile u16 *)addr;
70}
71
72static __inline__ u32 __raw_readl(unsigned long addr)
73{
74	return *(volatile u32 *)addr;
75}
76
77static __inline__ void __raw_writeb(u8 b, unsigned long addr)
78{
79	*(volatile u8 *)addr = b;
80}
81
82static __inline__ void __raw_writew(u16 b, unsigned long addr)
83{
84	*(volatile u16 *)addr = b;
85}
86
87static __inline__ void __raw_writel(u32 b, unsigned long addr)
88{
89	*(volatile u32 *)addr = b;
90}
91
92/*
93 * I/O space operations
94 *
95 * Arrangement on a Sun is somewhat complicated.
96 *
97 * First of all, we want to use standard Linux drivers
98 * for keyboard, PC serial, etc. These drivers think
99 * they access I/O space and use inb/outb.
100 * On the other hand, EBus bridge accepts PCI *memory*
101 * cycles and converts them into ISA *I/O* cycles.
102 * Ergo, we want inb & outb to generate PCI memory cycles.
103 *
104 * If we want to issue PCI *I/O* cycles, we do this
105 * with a low 64K fixed window in PCIC. This window gets
106 * mapped somewhere into virtual kernel space and we
107 * can use inb/outb again.
108 */
109#define inb_local(addr)		readb(addr)
110#define inb(addr)		readb(addr)
111#define inw(addr)		readw(addr)
112#define inl(addr)		readl(addr)
113#define inb_p(addr)		readb(addr)
114
115#define outb_local(b, addr)	writeb(b, addr)
116#define outb(b, addr)		writeb(b, addr)
117#define outw(b, addr)		writew(b, addr)
118#define outl(b, addr)		writel(b, addr)
119#define outb_p(b, addr)		writeb(b, addr)
120
121extern void outsb(unsigned long addr, const void *src, unsigned long cnt);
122extern void outsw(unsigned long addr, const void *src, unsigned long cnt);
123extern void outsl(unsigned long addr, const void *src, unsigned long cnt);
124extern void insb(unsigned long addr, void *dst, unsigned long count);
125extern void insw(unsigned long addr, void *dst, unsigned long count);
126extern void insl(unsigned long addr, void *dst, unsigned long count);
127
128#define IO_SPACE_LIMIT 0xffffffff
129
130/*
131 * SBus accessors.
132 *
133 * SBus has only one, memory mapped, I/O space.
134 * We do not need to flip bytes for SBus of course.
135 */
136static __inline__ u8 _sbus_readb(unsigned long addr)
137{
138	return *(volatile u8 *)addr;
139}
140
141static __inline__ u16 _sbus_readw(unsigned long addr)
142{
143	return *(volatile u16 *)addr;
144}
145
146static __inline__ u32 _sbus_readl(unsigned long addr)
147{
148	return *(volatile u32 *)addr;
149}
150
151static __inline__ void _sbus_writeb(u8 b, unsigned long addr)
152{
153	*(volatile u8 *)addr = b;
154}
155
156static __inline__ void _sbus_writew(u16 b, unsigned long addr)
157{
158	*(volatile u16 *)addr = b;
159}
160
161static __inline__ void _sbus_writel(u32 b, unsigned long addr)
162{
163	*(volatile u32 *)addr = b;
164}
165
166#define sbus_readb(a)		_sbus_readb((unsigned long)(a))
167#define sbus_readw(a)		_sbus_readw((unsigned long)(a))
168#define sbus_readl(a)		_sbus_readl((unsigned long)(a))
169#define sbus_writeb(v, a)	_sbus_writeb(v, (unsigned long)(a))
170#define sbus_writew(v, a)	_sbus_writew(v, (unsigned long)(a))
171#define sbus_writel(v, a)	_sbus_writel(v, (unsigned long)(a))
172
173static inline void *sbus_memset_io(void *__dst, int c, __kernel_size_t n)
174{
175	unsigned long dst = (unsigned long)__dst;
176
177	while(n--) {
178		sbus_writeb(c, dst);
179		dst++;
180	}
181	return (void *) dst;
182}
183
184#ifdef __KERNEL__
185
186/*
187 * Bus number may be embedded in the higher bits of the physical address.
188 * This is why we have no bus number argument to ioremap().
189 */
190extern void *ioremap(unsigned long offset, unsigned long size);
191#define ioremap_nocache(X,Y)	ioremap((X),(Y))
192extern void iounmap(void *addr);
193
194/* P3: talk davem into dropping "name" argument in favor of res->name */
195/*
196 * Bus number may be in res->flags... somewhere.
197 */
198extern unsigned long sbus_ioremap(struct resource *res, unsigned long offset,
199    unsigned long size, char *name);
200extern void sbus_iounmap(unsigned long vaddr, unsigned long size);
201
202
203#define virt_to_phys(x) __pa((unsigned long)(x))
204#define phys_to_virt(x) __va((unsigned long)(x))
205
206/*
207 * At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
208 * so rtc_port is static in it. This should not change unless a new
209 * hardware pops up.
210 */
211#define RTC_PORT(x)   (rtc_port + (x))
212#define RTC_ALWAYS_BCD  0
213
214/* Nothing to do */
215/* P3: Only IDE DMA may need these. */
216
217#define dma_cache_inv(_start,_size)		do { } while (0)
218#define dma_cache_wback(_start,_size)		do { } while (0)
219#define dma_cache_wback_inv(_start,_size)	do { } while (0)
220
221#endif
222
223#endif /* !(__SPARC_IO_H) */
224