ia64/linux-2.6.18-xen.hg

view include/asm-h8300/io.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 #ifndef _H8300_IO_H
2 #define _H8300_IO_H
4 #ifdef __KERNEL__
6 #include <asm/virtconvert.h>
8 #if defined(CONFIG_H83007) || defined(CONFIG_H83068)
9 #include <asm/regs306x.h>
10 #elif defined(CONFIG_H8S2678)
11 #include <asm/regs267x.h>
12 #else
13 #error UNKNOWN CPU TYPE
14 #endif
17 /*
18 * These are for ISA/PCI shared memory _only_ and should never be used
19 * on any other type of memory, including Zorro memory. They are meant to
20 * access the bus in the bus byte order which is little-endian!.
21 *
22 * readX/writeX() are used to access memory mapped devices. On some
23 * architectures the memory mapped IO stuff needs to be accessed
24 * differently. On the m68k architecture, we just read/write the
25 * memory location directly.
26 */
27 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
28 * two accesses to memory, which may be undesireable for some devices.
29 */
31 /*
32 * swap functions are sometimes needed to interface little-endian hardware
33 */
35 static inline unsigned short _swapw(volatile unsigned short v)
36 {
37 #ifndef H8300_IO_NOSWAP
38 unsigned short r;
39 __asm__("xor.b %w0,%x0\n\t"
40 "xor.b %x0,%w0\n\t"
41 "xor.b %w0,%x0"
42 :"=r"(r)
43 :"0"(v));
44 return r;
45 #else
46 return v;
47 #endif
48 }
50 static inline unsigned long _swapl(volatile unsigned long v)
51 {
52 #ifndef H8300_IO_NOSWAP
53 unsigned long r;
54 __asm__("xor.b %w0,%x0\n\t"
55 "xor.b %x0,%w0\n\t"
56 "xor.b %w0,%x0\n\t"
57 "xor.w %e0,%f0\n\t"
58 "xor.w %f0,%e0\n\t"
59 "xor.w %e0,%f0\n\t"
60 "xor.b %w0,%x0\n\t"
61 "xor.b %x0,%w0\n\t"
62 "xor.b %w0,%x0"
63 :"=r"(r)
64 :"0"(v));
65 return r;
66 #else
67 return v;
68 #endif
69 }
71 #define readb(addr) \
72 ({ unsigned char __v = \
73 *(volatile unsigned char *)((unsigned long)(addr) & 0x00ffffff); \
74 __v; })
75 #define readw(addr) \
76 ({ unsigned short __v = \
77 *(volatile unsigned short *)((unsigned long)(addr) & 0x00ffffff); \
78 __v; })
79 #define readl(addr) \
80 ({ unsigned long __v = \
81 *(volatile unsigned long *)((unsigned long)(addr) & 0x00ffffff); \
82 __v; })
84 #define writeb(b,addr) (void)((*(volatile unsigned char *) \
85 ((unsigned long)(addr) & 0x00ffffff)) = (b))
86 #define writew(b,addr) (void)((*(volatile unsigned short *) \
87 ((unsigned long)(addr) & 0x00ffffff)) = (b))
88 #define writel(b,addr) (void)((*(volatile unsigned long *) \
89 ((unsigned long)(addr) & 0x00ffffff)) = (b))
90 #define readb_relaxed(addr) readb(addr)
91 #define readw_relaxed(addr) readw(addr)
92 #define readl_relaxed(addr) readl(addr)
94 #define __raw_readb readb
95 #define __raw_readw readw
96 #define __raw_readl readl
97 #define __raw_writeb writeb
98 #define __raw_writew writew
99 #define __raw_writel writel
101 static inline int h8300_buswidth(unsigned int addr)
102 {
103 return (*(volatile unsigned char *)ABWCR & (1 << ((addr >> 21) & 7))) == 0;
104 }
106 static inline void io_outsb(unsigned int addr, const void *buf, int len)
107 {
108 volatile unsigned char *ap_b = (volatile unsigned char *) addr;
109 volatile unsigned short *ap_w = (volatile unsigned short *) addr;
110 unsigned char *bp = (unsigned char *) buf;
112 if(h8300_buswidth(addr) && (addr & 1)) {
113 while (len--)
114 *ap_w = *bp++;
115 } else {
116 while (len--)
117 *ap_b = *bp++;
118 }
119 }
121 static inline void io_outsw(unsigned int addr, const void *buf, int len)
122 {
123 volatile unsigned short *ap = (volatile unsigned short *) addr;
124 unsigned short *bp = (unsigned short *) buf;
125 while (len--)
126 *ap = _swapw(*bp++);
127 }
129 static inline void io_outsl(unsigned int addr, const void *buf, int len)
130 {
131 volatile unsigned long *ap = (volatile unsigned long *) addr;
132 unsigned long *bp = (unsigned long *) buf;
133 while (len--)
134 *ap = _swapl(*bp++);
135 }
137 static inline void io_outsw_noswap(unsigned int addr, const void *buf, int len)
138 {
139 volatile unsigned short *ap = (volatile unsigned short *) addr;
140 unsigned short *bp = (unsigned short *) buf;
141 while (len--)
142 *ap = *bp++;
143 }
145 static inline void io_outsl_noswap(unsigned int addr, const void *buf, int len)
146 {
147 volatile unsigned long *ap = (volatile unsigned long *) addr;
148 unsigned long *bp = (unsigned long *) buf;
149 while (len--)
150 *ap = *bp++;
151 }
153 static inline void io_insb(unsigned int addr, void *buf, int len)
154 {
155 volatile unsigned char *ap_b;
156 volatile unsigned short *ap_w;
157 unsigned char *bp = (unsigned char *) buf;
159 if(h8300_buswidth(addr)) {
160 ap_w = (volatile unsigned short *)(addr & ~1);
161 while (len--)
162 *bp++ = *ap_w & 0xff;
163 } else {
164 ap_b = (volatile unsigned char *)addr;
165 while (len--)
166 *bp++ = *ap_b;
167 }
168 }
170 static inline void io_insw(unsigned int addr, void *buf, int len)
171 {
172 volatile unsigned short *ap = (volatile unsigned short *) addr;
173 unsigned short *bp = (unsigned short *) buf;
174 while (len--)
175 *bp++ = _swapw(*ap);
176 }
178 static inline void io_insl(unsigned int addr, void *buf, int len)
179 {
180 volatile unsigned long *ap = (volatile unsigned long *) addr;
181 unsigned long *bp = (unsigned long *) buf;
182 while (len--)
183 *bp++ = _swapl(*ap);
184 }
186 static inline void io_insw_noswap(unsigned int addr, void *buf, int len)
187 {
188 volatile unsigned short *ap = (volatile unsigned short *) addr;
189 unsigned short *bp = (unsigned short *) buf;
190 while (len--)
191 *bp++ = *ap;
192 }
194 static inline void io_insl_noswap(unsigned int addr, void *buf, int len)
195 {
196 volatile unsigned long *ap = (volatile unsigned long *) addr;
197 unsigned long *bp = (unsigned long *) buf;
198 while (len--)
199 *bp++ = *ap;
200 }
202 /*
203 * make the short names macros so specific devices
204 * can override them as required
205 */
207 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
208 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
209 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
211 #define mmiowb()
213 #define inb(addr) ((h8300_buswidth(addr))?readw((addr) & ~1) & 0xff:readb(addr))
214 #define inw(addr) _swapw(readw(addr))
215 #define inl(addr) _swapl(readl(addr))
216 #define outb(x,addr) ((void)((h8300_buswidth(addr) && \
217 ((addr) & 1))?writew(x,(addr) & ~1):writeb(x,addr)))
218 #define outw(x,addr) ((void) writew(_swapw(x),addr))
219 #define outl(x,addr) ((void) writel(_swapl(x),addr))
221 #define inb_p(addr) inb(addr)
222 #define inw_p(addr) inw(addr)
223 #define inl_p(addr) inl(addr)
224 #define outb_p(x,addr) outb(x,addr)
225 #define outw_p(x,addr) outw(x,addr)
226 #define outl_p(x,addr) outl(x,addr)
228 #define outsb(a,b,l) io_outsb(a,b,l)
229 #define outsw(a,b,l) io_outsw(a,b,l)
230 #define outsl(a,b,l) io_outsl(a,b,l)
232 #define insb(a,b,l) io_insb(a,b,l)
233 #define insw(a,b,l) io_insw(a,b,l)
234 #define insl(a,b,l) io_insl(a,b,l)
236 #define IO_SPACE_LIMIT 0xffffff
239 /* Values for nocacheflag and cmode */
240 #define IOMAP_FULL_CACHING 0
241 #define IOMAP_NOCACHE_SER 1
242 #define IOMAP_NOCACHE_NONSER 2
243 #define IOMAP_WRITETHROUGH 3
245 extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
246 extern void __iounmap(void *addr, unsigned long size);
248 static inline void *ioremap(unsigned long physaddr, unsigned long size)
249 {
250 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
251 }
252 static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
253 {
254 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
255 }
256 static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size)
257 {
258 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
259 }
260 static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
261 {
262 return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
263 }
265 extern void iounmap(void *addr);
267 /* Nothing to do */
269 #define dma_cache_inv(_start,_size) do { } while (0)
270 #define dma_cache_wback(_start,_size) do { } while (0)
271 #define dma_cache_wback_inv(_start,_size) do { } while (0)
273 /* H8/300 internal I/O functions */
274 static __inline__ unsigned char ctrl_inb(unsigned long addr)
275 {
276 return *(volatile unsigned char*)addr;
277 }
279 static __inline__ unsigned short ctrl_inw(unsigned long addr)
280 {
281 return *(volatile unsigned short*)addr;
282 }
284 static __inline__ unsigned long ctrl_inl(unsigned long addr)
285 {
286 return *(volatile unsigned long*)addr;
287 }
289 static __inline__ void ctrl_outb(unsigned char b, unsigned long addr)
290 {
291 *(volatile unsigned char*)addr = b;
292 }
294 static __inline__ void ctrl_outw(unsigned short b, unsigned long addr)
295 {
296 *(volatile unsigned short*)addr = b;
297 }
299 static __inline__ void ctrl_outl(unsigned long b, unsigned long addr)
300 {
301 *(volatile unsigned long*)addr = b;
302 }
304 /* Pages to physical address... */
305 #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
306 #define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT)
308 /*
309 * Macros used for converting between virtual and physical mappings.
310 */
311 #define mm_ptov(vaddr) ((void *) (vaddr))
312 #define mm_vtop(vaddr) ((unsigned long) (vaddr))
313 #define phys_to_virt(vaddr) ((void *) (vaddr))
314 #define virt_to_phys(vaddr) ((unsigned long) (vaddr))
316 #define virt_to_bus virt_to_phys
317 #define bus_to_virt phys_to_virt
319 /*
320 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
321 * access
322 */
323 #define xlate_dev_mem_ptr(p) __va(p)
325 /*
326 * Convert a virtual cached pointer to an uncached pointer
327 */
328 #define xlate_dev_kmem_ptr(p) p
330 #endif /* __KERNEL__ */
332 #endif /* _H8300_IO_H */