xref: /openbmc/u-boot/arch/powerpc/include/asm/io.h (revision 2290fe06)
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
5  */
6 
7 #ifndef _PPC_IO_H
8 #define _PPC_IO_H
9 
10 #include <asm/byteorder.h>
11 
12 #ifdef CONFIG_ADDR_MAP
13 #include <addr_map.h>
14 #endif
15 
16 #define SIO_CONFIG_RA   0x398
17 #define SIO_CONFIG_RD   0x399
18 
19 #ifndef _IO_BASE
20 #define _IO_BASE 0
21 #endif
22 
23 #define readb(addr) in_8((volatile u8 *)(addr))
24 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
25 #if !defined(__BIG_ENDIAN)
26 #define readw(addr) (*(volatile u16 *) (addr))
27 #define readl(addr) (*(volatile u32 *) (addr))
28 #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
29 #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
30 #else
31 #define readw(addr) in_le16((volatile u16 *)(addr))
32 #define readl(addr) in_le32((volatile u32 *)(addr))
33 #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
34 #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
35 #endif
36 
37 /*
38  * The insw/outsw/insl/outsl macros don't do byte-swapping.
39  * They are only used in practice for transferring buffers which
40  * are arrays of bytes, and byte-swapping is not appropriate in
41  * that case.  - paulus
42  */
43 #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
44 #define outsb(port, buf, ns)    _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
45 #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
46 #define outsw(port, buf, ns)    _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
47 #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
48 #define outsl(port, buf, nl)    _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
49 
50 #define inb(port)       in_8((u8 *)((port)+_IO_BASE))
51 #define outb(val, port)     out_8((u8 *)((port)+_IO_BASE), (val))
52 #if !defined(__BIG_ENDIAN)
53 #define inw(port)       in_be16((u16 *)((port)+_IO_BASE))
54 #define outw(val, port)     out_be16((u16 *)((port)+_IO_BASE), (val))
55 #define inl(port)       in_be32((u32 *)((port)+_IO_BASE))
56 #define outl(val, port)     out_be32((u32 *)((port)+_IO_BASE), (val))
57 #else
58 #define inw(port)       in_le16((u16 *)((port)+_IO_BASE))
59 #define outw(val, port)     out_le16((u16 *)((port)+_IO_BASE), (val))
60 #define inl(port)       in_le32((u32 *)((port)+_IO_BASE))
61 #define outl(val, port)     out_le32((u32 *)((port)+_IO_BASE), (val))
62 #endif
63 
64 #define inb_p(port)     in_8((u8 *)((port)+_IO_BASE))
65 #define outb_p(val, port)   out_8((u8 *)((port)+_IO_BASE), (val))
66 #define inw_p(port)     in_le16((u16 *)((port)+_IO_BASE))
67 #define outw_p(val, port)   out_le16((u16 *)((port)+_IO_BASE), (val))
68 #define inl_p(port)     in_le32((u32 *)((port)+_IO_BASE))
69 #define outl_p(val, port)   out_le32((u32 *)((port)+_IO_BASE), (val))
70 
71 extern void _insb(volatile u8 *port, void *buf, int ns);
72 extern void _outsb(volatile u8 *port, const void *buf, int ns);
73 extern void _insw(volatile u16 *port, void *buf, int ns);
74 extern void _outsw(volatile u16 *port, const void *buf, int ns);
75 extern void _insl(volatile u32 *port, void *buf, int nl);
76 extern void _outsl(volatile u32 *port, const void *buf, int nl);
77 extern void _insw_ns(volatile u16 *port, void *buf, int ns);
78 extern void _outsw_ns(volatile u16 *port, const void *buf, int ns);
79 extern void _insl_ns(volatile u32 *port, void *buf, int nl);
80 extern void _outsl_ns(volatile u32 *port, const void *buf, int nl);
81 
82 /*
83  * The *_ns versions below don't do byte-swapping.
84  * Neither do the standard versions now, these are just here
85  * for older code.
86  */
87 #define insw_ns(port, buf, ns)  _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
88 #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
89 #define insl_ns(port, buf, nl)  _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
90 #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
91 
92 
93 #define IO_SPACE_LIMIT ~0
94 
95 #define memset_io(a,b,c)       memset((void *)(a),(b),(c))
96 #define memcpy_fromio(a,b,c)   memcpy((a),(void *)(b),(c))
97 #define memcpy_toio(a,b,c)  memcpy((void *)(a),(b),(c))
98 
99 /*
100  * Enforce In-order Execution of I/O:
101  * Acts as a barrier to ensure all previous I/O accesses have
102  * completed before any further ones are issued.
103  */
104 static inline void eieio(void)
105 {
106 	__asm__ __volatile__ ("eieio" : : : "memory");
107 }
108 
109 static inline void sync(void)
110 {
111 	__asm__ __volatile__ ("sync" : : : "memory");
112 }
113 
114 static inline void isync(void)
115 {
116 	__asm__ __volatile__ ("isync" : : : "memory");
117 }
118 
119 /* Enforce in-order execution of data I/O.
120  * No distinction between read/write on PPC; use eieio for all three.
121  */
122 #define iobarrier_rw() eieio()
123 #define iobarrier_r()  eieio()
124 #define iobarrier_w()  eieio()
125 
126 #define mb()	sync()
127 #define isb()	isync()
128 
129 /*
130  * Non ordered and non-swapping "raw" accessors
131  */
132 #define PCI_FIX_ADDR(addr)	(addr)
133 
134 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
135 {
136 	return *(volatile unsigned char *)PCI_FIX_ADDR(addr);
137 }
138 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
139 {
140 	return *(volatile unsigned short *)PCI_FIX_ADDR(addr);
141 }
142 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
143 {
144 	return *(volatile unsigned int *)PCI_FIX_ADDR(addr);
145 }
146 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
147 {
148 	*(volatile unsigned char *)PCI_FIX_ADDR(addr) = v;
149 }
150 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
151 {
152 	*(volatile unsigned short *)PCI_FIX_ADDR(addr) = v;
153 }
154 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
155 {
156 	*(volatile unsigned int *)PCI_FIX_ADDR(addr) = v;
157 }
158 
159 /*
160  * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
161  *
162  * Read operations have additional twi & isync to make sure the read
163  * is actually performed (i.e. the data has come back) before we start
164  * executing any following instructions.
165  */
166 static inline u8 in_8(const volatile unsigned char __iomem *addr)
167 {
168 	u8 ret;
169 
170 	__asm__ __volatile__(
171 		"sync; lbz%U1%X1 %0,%1;\n"
172 		"twi 0,%0,0;\n"
173 		"isync" : "=r" (ret) : "m" (*addr));
174 	return ret;
175 }
176 
177 static inline void out_8(volatile unsigned char __iomem *addr, u8 val)
178 {
179 	__asm__ __volatile__("sync;\n"
180 			     "stb%U0%X0 %1,%0;\n"
181 			     : "=m" (*addr)
182 			     : "r" (val));
183 }
184 
185 static inline u16 in_le16(const volatile unsigned short __iomem *addr)
186 {
187 	u16 ret;
188 
189 	__asm__ __volatile__("sync; lhbrx %0,0,%1;\n"
190 			     "twi 0,%0,0;\n"
191 			     "isync" : "=r" (ret) :
192 			      "r" (addr), "m" (*addr));
193 	return ret;
194 }
195 
196 static inline u16 in_be16(const volatile unsigned short __iomem *addr)
197 {
198 	u16 ret;
199 
200 	__asm__ __volatile__("sync; lhz%U1%X1 %0,%1;\n"
201 			     "twi 0,%0,0;\n"
202 			     "isync" : "=r" (ret) : "m" (*addr));
203 	return ret;
204 }
205 
206 static inline void out_le16(volatile unsigned short __iomem *addr, u16 val)
207 {
208 	__asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) :
209 			      "r" (val), "r" (addr));
210 }
211 
212 static inline void out_be16(volatile unsigned short __iomem *addr, u16 val)
213 {
214 	__asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
215 }
216 
217 static inline u32 in_le32(const volatile unsigned __iomem *addr)
218 {
219 	u32 ret;
220 
221 	__asm__ __volatile__("sync; lwbrx %0,0,%1;\n"
222 			     "twi 0,%0,0;\n"
223 			     "isync" : "=r" (ret) :
224 			     "r" (addr), "m" (*addr));
225 	return ret;
226 }
227 
228 static inline u32 in_be32(const volatile unsigned __iomem *addr)
229 {
230 	u32 ret;
231 
232 	__asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n"
233 			     "twi 0,%0,0;\n"
234 			     "isync" : "=r" (ret) : "m" (*addr));
235 	return ret;
236 }
237 
238 static inline void out_le32(volatile unsigned __iomem *addr, u32 val)
239 {
240 	__asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) :
241 			     "r" (val), "r" (addr));
242 }
243 
244 static inline void out_be32(volatile unsigned __iomem *addr, u32 val)
245 {
246 	__asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
247 }
248 
249 /* Clear and set bits in one shot. These macros can be used to clear and
250  * set multiple bits in a register using a single call. These macros can
251  * also be used to set a multiple-bit bit pattern using a mask, by
252  * specifying the mask in the 'clear' parameter and the new bit pattern
253  * in the 'set' parameter.
254  */
255 
256 #define clrbits(type, addr, clear) \
257 	out_##type((addr), in_##type(addr) & ~(clear))
258 
259 #define setbits(type, addr, set) \
260 	out_##type((addr), in_##type(addr) | (set))
261 
262 #define clrsetbits(type, addr, clear, set) \
263 	out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
264 
265 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
266 #define setbits_be32(addr, set) setbits(be32, addr, set)
267 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
268 
269 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
270 #define setbits_le32(addr, set) setbits(le32, addr, set)
271 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
272 
273 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
274 #define setbits_be16(addr, set) setbits(be16, addr, set)
275 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
276 
277 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
278 #define setbits_le16(addr, set) setbits(le16, addr, set)
279 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
280 
281 #define clrbits_8(addr, clear) clrbits(8, addr, clear)
282 #define setbits_8(addr, set) setbits(8, addr, set)
283 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
284 
285 /*
286  * Given a physical address and a length, return a virtual address
287  * that can be used to access the memory range with the caching
288  * properties specified by "flags".
289  */
290 #define MAP_NOCACHE	(0)
291 #define MAP_WRCOMBINE	(0)
292 #define MAP_WRBACK	(0)
293 #define MAP_WRTHROUGH	(0)
294 
295 static inline void *
296 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
297 {
298 #ifdef CONFIG_ADDR_MAP
299 	return addrmap_phys_to_virt(paddr);
300 #else
301 	return (void *)((unsigned long)paddr);
302 #endif
303 }
304 
305 /*
306  * Take down a mapping set up by map_physmem().
307  */
308 static inline void unmap_physmem(void *vaddr, unsigned long flags)
309 {
310 
311 }
312 
313 static inline phys_addr_t virt_to_phys(void * vaddr)
314 {
315 #ifdef CONFIG_ADDR_MAP
316 	return addrmap_virt_to_phys(vaddr);
317 #else
318 	return (phys_addr_t)((unsigned long)vaddr);
319 #endif
320 }
321 
322 #endif
323