2 * $Id: io.h,v 1.30 2001/12/21 01:23:21 davem Exp $
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/ioport.h> /* struct resource */
11 #include <asm/page.h> /* IO address mapping routines need this */
12 #include <asm/system.h>
14 #define page_to_phys(page) (((page) - mem_map) << PAGE_SHIFT)
16 static inline u32 flip_dword (u32 l)
18 return ((l&0xff)<<24) | (((l>>8)&0xff)<<16) | (((l>>16)&0xff)<<8)| ((l>>24)&0xff);
21 static inline u16 flip_word (u16 w)
23 return ((w&0xff) << 8) | ((w>>8)&0xff);
29 * Memory mapped I/O to PCI
32 static inline u8 __raw_readb(const volatile void __iomem *addr)
34 return *(__force volatile u8 *)addr;
37 static inline u16 __raw_readw(const volatile void __iomem *addr)
39 return *(__force volatile u16 *)addr;
42 static inline u32 __raw_readl(const volatile void __iomem *addr)
44 return *(__force volatile u32 *)addr;
47 static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
49 *(__force volatile u8 *)addr = b;
52 static inline void __raw_writew(u16 w, volatile void __iomem *addr)
54 *(__force volatile u16 *)addr = w;
57 static inline void __raw_writel(u32 l, volatile void __iomem *addr)
59 *(__force volatile u32 *)addr = l;
62 static inline u8 __readb(const volatile void __iomem *addr)
64 return *(__force volatile u8 *)addr;
67 static inline u16 __readw(const volatile void __iomem *addr)
69 return flip_word(*(__force volatile u16 *)addr);
72 static inline u32 __readl(const volatile void __iomem *addr)
74 return flip_dword(*(__force volatile u32 *)addr);
77 static inline void __writeb(u8 b, volatile void __iomem *addr)
79 *(__force volatile u8 *)addr = b;
82 static inline void __writew(u16 w, volatile void __iomem *addr)
84 *(__force volatile u16 *)addr = flip_word(w);
87 static inline void __writel(u32 l, volatile void __iomem *addr)
89 *(__force volatile u32 *)addr = flip_dword(l);
92 #define readb(__addr) __readb(__addr)
93 #define readw(__addr) __readw(__addr)
94 #define readl(__addr) __readl(__addr)
95 #define readb_relaxed(__addr) readb(__addr)
96 #define readw_relaxed(__addr) readw(__addr)
97 #define readl_relaxed(__addr) readl(__addr)
99 #define writeb(__b, __addr) __writeb((__b),(__addr))
100 #define writew(__w, __addr) __writew((__w),(__addr))
101 #define writel(__l, __addr) __writel((__l),(__addr))
104 * I/O space operations
106 * Arrangement on a Sun is somewhat complicated.
108 * First of all, we want to use standard Linux drivers
109 * for keyboard, PC serial, etc. These drivers think
110 * they access I/O space and use inb/outb.
111 * On the other hand, EBus bridge accepts PCI *memory*
112 * cycles and converts them into ISA *I/O* cycles.
113 * Ergo, we want inb & outb to generate PCI memory cycles.
115 * If we want to issue PCI *I/O* cycles, we do this
116 * with a low 64K fixed window in PCIC. This window gets
117 * mapped somewhere into virtual kernel space and we
118 * can use inb/outb again.
120 #define inb_local(__addr) __readb((void __iomem *)(unsigned long)(__addr))
121 #define inb(__addr) __readb((void __iomem *)(unsigned long)(__addr))
122 #define inw(__addr) __readw((void __iomem *)(unsigned long)(__addr))
123 #define inl(__addr) __readl((void __iomem *)(unsigned long)(__addr))
125 #define outb_local(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
126 #define outb(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
127 #define outw(__w, __addr) __writew(__w, (void __iomem *)(unsigned long)(__addr))
128 #define outl(__l, __addr) __writel(__l, (void __iomem *)(unsigned long)(__addr))
130 #define inb_p(__addr) inb(__addr)
131 #define outb_p(__b, __addr) outb(__b, __addr)
132 #define inw_p(__addr) inw(__addr)
133 #define outw_p(__w, __addr) outw(__w, __addr)
134 #define inl_p(__addr) inl(__addr)
135 #define outl_p(__l, __addr) outl(__l, __addr)
137 void outsb(unsigned long addr, const void *src, unsigned long cnt);
138 void outsw(unsigned long addr, const void *src, unsigned long cnt);
139 void outsl(unsigned long addr, const void *src, unsigned long cnt);
140 void insb(unsigned long addr, void *dst, unsigned long count);
141 void insw(unsigned long addr, void *dst, unsigned long count);
142 void insl(unsigned long addr, void *dst, unsigned long count);
144 #define IO_SPACE_LIMIT 0xffffffff
149 * SBus has only one, memory mapped, I/O space.
150 * We do not need to flip bytes for SBus of course.
152 static inline u8 _sbus_readb(const volatile void __iomem *addr)
154 return *(__force volatile u8 *)addr;
157 static inline u16 _sbus_readw(const volatile void __iomem *addr)
159 return *(__force volatile u16 *)addr;
162 static inline u32 _sbus_readl(const volatile void __iomem *addr)
164 return *(__force volatile u32 *)addr;
167 static inline void _sbus_writeb(u8 b, volatile void __iomem *addr)
169 *(__force volatile u8 *)addr = b;
172 static inline void _sbus_writew(u16 w, volatile void __iomem *addr)
174 *(__force volatile u16 *)addr = w;
177 static inline void _sbus_writel(u32 l, volatile void __iomem *addr)
179 *(__force volatile u32 *)addr = l;
183 * The only reason for #define's is to hide casts to unsigned long.
185 #define sbus_readb(__addr) _sbus_readb(__addr)
186 #define sbus_readw(__addr) _sbus_readw(__addr)
187 #define sbus_readl(__addr) _sbus_readl(__addr)
188 #define sbus_writeb(__b, __addr) _sbus_writeb(__b, __addr)
189 #define sbus_writew(__w, __addr) _sbus_writew(__w, __addr)
190 #define sbus_writel(__l, __addr) _sbus_writel(__l, __addr)
192 static inline void sbus_memset_io(volatile void __iomem *__dst, int c, __kernel_size_t n)
195 sbus_writeb(c, __dst);
201 _memset_io(volatile void __iomem *dst, int c, __kernel_size_t n)
203 volatile void __iomem *d = dst;
211 #define memset_io(d,c,sz) _memset_io(d,c,sz)
214 _memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n)
219 char tmp = readb(src);
225 #define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
228 _memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n)
231 volatile void __iomem *d = dst;
240 #define memcpy_toio(d,s,sz) _memcpy_toio(d,s,sz)
245 * Bus number may be embedded in the higher bits of the physical address.
246 * This is why we have no bus number argument to ioremap().
248 extern void __iomem *ioremap(unsigned long offset, unsigned long size);
249 #define ioremap_nocache(X,Y) ioremap((X),(Y))
250 extern void iounmap(volatile void __iomem *addr);
252 #define ioread8(X) readb(X)
253 #define ioread16(X) readw(X)
254 #define ioread32(X) readl(X)
255 #define iowrite8(val,X) writeb(val,X)
256 #define iowrite16(val,X) writew(val,X)
257 #define iowrite32(val,X) writel(val,X)
259 static inline void ioread8_rep(void __iomem *port, void *buf, unsigned long count)
261 insb((unsigned long __force)port, buf, count);
263 static inline void ioread16_rep(void __iomem *port, void *buf, unsigned long count)
265 insw((unsigned long __force)port, buf, count);
268 static inline void ioread32_rep(void __iomem *port, void *buf, unsigned long count)
270 insl((unsigned long __force)port, buf, count);
273 static inline void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count)
275 outsb((unsigned long __force)port, buf, count);
278 static inline void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count)
280 outsw((unsigned long __force)port, buf, count);
283 static inline void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count)
285 outsl((unsigned long __force)port, buf, count);
288 /* Create a virtual mapping cookie for an IO port range */
289 extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
290 extern void ioport_unmap(void __iomem *);
292 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
294 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
295 extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
298 * Bus number may be in res->flags... somewhere.
300 extern void __iomem *sbus_ioremap(struct resource *res, unsigned long offset,
301 unsigned long size, char *name);
302 extern void sbus_iounmap(volatile void __iomem *vaddr, unsigned long size);
306 * At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
307 * so rtc_port is static in it. This should not change unless a new
310 #define RTC_PORT(x) (rtc_port + (x))
311 #define RTC_ALWAYS_BCD 0
315 #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1
318 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
321 #define xlate_dev_mem_ptr(p) __va(p)
324 * Convert a virtual cached pointer to an uncached pointer
326 #define xlate_dev_kmem_ptr(p) p
328 #endif /* !(__SPARC_IO_H) */