1 /* originally from linux source.
2 * removed the dependencies on CONFIG_ values
3 * removed virt_to_phys stuff (and in fact everything surrounded by #if __KERNEL__)
4 * Modified By Rob Taylor, Flying Pig Systems, 2000
10 #include <linux/config.h>
11 #include <asm/byteorder.h>
13 #define SIO_CONFIG_RA 0x398
14 #define SIO_CONFIG_RD 0x399
20 #define readb(addr) in_8((volatile u8 *)(addr))
21 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
22 #if !defined(__BIG_ENDIAN)
23 #define readw(addr) (*(volatile u16 *) (addr))
24 #define readl(addr) (*(volatile u32 *) (addr))
25 #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
26 #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
28 #define readw(addr) in_le16((volatile u16 *)(addr))
29 #define readl(addr) in_le32((volatile u32 *)(addr))
30 #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
31 #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
35 * The insw/outsw/insl/outsl macros don't do byte-swapping.
36 * They are only used in practice for transferring buffers which
37 * are arrays of bytes, and byte-swapping is not appropriate in
40 #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
41 #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
42 #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
43 #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
44 #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
45 #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
47 #define inb(port) in_8((u8 *)((port)+_IO_BASE))
48 #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
49 #if !defined(__BIG_ENDIAN)
50 #define inw(port) in_be16((u16 *)((port)+_IO_BASE))
51 #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
52 #define inl(port) in_be32((u32 *)((port)+_IO_BASE))
53 #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
55 #define inw(port) in_le16((u16 *)((port)+_IO_BASE))
56 #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
57 #define inl(port) in_le32((u32 *)((port)+_IO_BASE))
58 #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
61 #define inb_p(port) in_8((u8 *)((port)+_IO_BASE))
62 #define outb_p(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
63 #define inw_p(port) in_le16((u16 *)((port)+_IO_BASE))
64 #define outw_p(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
65 #define inl_p(port) in_le32((u32 *)((port)+_IO_BASE))
66 #define outl_p(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
68 extern void _insb(volatile u8 *port, void *buf, int ns);
69 extern void _outsb(volatile u8 *port, const void *buf, int ns);
70 extern void _insw(volatile u16 *port, void *buf, int ns);
71 extern void _outsw(volatile u16 *port, const void *buf, int ns);
72 extern void _insl(volatile u32 *port, void *buf, int nl);
73 extern void _outsl(volatile u32 *port, const void *buf, int nl);
74 extern void _insw_ns(volatile u16 *port, void *buf, int ns);
75 extern void _outsw_ns(volatile u16 *port, const void *buf, int ns);
76 extern void _insl_ns(volatile u32 *port, void *buf, int nl);
77 extern void _outsl_ns(volatile u32 *port, const void *buf, int nl);
80 * The *_ns versions below don't do byte-swapping.
81 * Neither do the standard versions now, these are just here
84 #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
85 #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
86 #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
87 #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
90 #define IO_SPACE_LIMIT ~0
92 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
93 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
94 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
97 * Enforce In-order Execution of I/O:
98 * Acts as a barrier to ensure all previous I/O accesses have
99 * completed before any further ones are issued.
101 static inline void eieio(void)
103 __asm__ __volatile__ ("eieio" : : : "memory");
106 static inline void sync(void)
108 __asm__ __volatile__ ("sync" : : : "memory");
111 static inline void isync(void)
113 __asm__ __volatile__ ("isync" : : : "memory");
116 /* Enforce in-order execution of data I/O.
117 * No distinction between read/write on PPC; use eieio for all three.
119 #define iobarrier_rw() eieio()
120 #define iobarrier_r() eieio()
121 #define iobarrier_w() eieio()
124 * Non ordered and non-swapping "raw" accessors
127 #define PCI_FIX_ADDR(addr) (addr)
129 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
131 return *(volatile unsigned char *)PCI_FIX_ADDR(addr);
133 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
135 return *(volatile unsigned short *)PCI_FIX_ADDR(addr);
137 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
139 return *(volatile unsigned int *)PCI_FIX_ADDR(addr);
141 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
143 *(volatile unsigned char *)PCI_FIX_ADDR(addr) = v;
145 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
147 *(volatile unsigned short *)PCI_FIX_ADDR(addr) = v;
149 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
151 *(volatile unsigned int *)PCI_FIX_ADDR(addr) = v;
155 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
157 * Read operations have additional twi & isync to make sure the read
158 * is actually performed (i.e. the data has come back) before we start
159 * executing any following instructions.
161 extern inline int in_8(const volatile unsigned char __iomem *addr)
165 __asm__ __volatile__(
166 "sync; lbz%U1%X1 %0,%1;\n"
168 "isync" : "=r" (ret) : "m" (*addr));
172 extern inline void out_8(volatile unsigned char __iomem *addr, int val)
174 __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
177 extern inline int in_le16(const volatile unsigned short __iomem *addr)
181 __asm__ __volatile__("sync; lhbrx %0,0,%1;\n"
183 "isync" : "=r" (ret) :
184 "r" (addr), "m" (*addr));
188 extern inline int in_be16(const volatile unsigned short __iomem *addr)
192 __asm__ __volatile__("sync; lhz%U1%X1 %0,%1;\n"
194 "isync" : "=r" (ret) : "m" (*addr));
198 extern inline void out_le16(volatile unsigned short __iomem *addr, int val)
200 __asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) :
201 "r" (val), "r" (addr));
204 extern inline void out_be16(volatile unsigned short __iomem *addr, int val)
206 __asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
209 extern inline unsigned in_le32(const volatile unsigned __iomem *addr)
213 __asm__ __volatile__("sync; lwbrx %0,0,%1;\n"
215 "isync" : "=r" (ret) :
216 "r" (addr), "m" (*addr));
220 extern inline unsigned in_be32(const volatile unsigned __iomem *addr)
224 __asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n"
226 "isync" : "=r" (ret) : "m" (*addr));
230 extern inline void out_le32(volatile unsigned __iomem *addr, int val)
232 __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) :
233 "r" (val), "r" (addr));
236 extern inline void out_be32(volatile unsigned __iomem *addr, int val)
238 __asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
241 /* Clear and set bits in one shot. These macros can be used to clear and
242 * set multiple bits in a register using a single call. These macros can
243 * also be used to set a multiple-bit bit pattern using a mask, by
244 * specifying the mask in the 'clear' parameter and the new bit pattern
245 * in the 'set' parameter.
248 #define clrbits(type, addr, clear) \
249 out_##type((addr), in_##type(addr) & ~(clear))
251 #define setbits(type, addr, set) \
252 out_##type((addr), in_##type(addr) | (set))
254 #define clrsetbits(type, addr, clear, set) \
255 out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
257 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
258 #define setbits_be32(addr, set) setbits(be32, addr, set)
259 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
261 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
262 #define setbits_le32(addr, set) setbits(le32, addr, set)
263 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
265 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
266 #define setbits_be16(addr, set) setbits(be16, addr, set)
267 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
269 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
270 #define setbits_le16(addr, set) setbits(le16, addr, set)
271 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
273 #define clrbits_8(addr, clear) clrbits(8, addr, clear)
274 #define setbits_8(addr, set) setbits(8, addr, set)
275 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
278 * Given a physical address and a length, return a virtual address
279 * that can be used to access the memory range with the caching
280 * properties specified by "flags".
282 #define MAP_NOCACHE (0)
283 #define MAP_WRCOMBINE (0)
284 #define MAP_WRBACK (0)
285 #define MAP_WRTHROUGH (0)
288 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
290 return (void *)((unsigned long)paddr);
294 * Take down a mapping set up by map_physmem().
296 static inline void unmap_physmem(void *vaddr, unsigned long flags)
301 static inline phys_addr_t virt_to_phys(void * vaddr)
303 return (phys_addr_t)((unsigned long)vaddr);