6 #include <linux/config.h>
7 #include <asm/virtconvert.h>
9 #if defined(CONFIG_H83007) || defined(CONFIG_H83068)
10 #include <asm/regs306x.h>
11 #elif defined(CONFIG_H8S2678)
12 #include <asm/regs267x.h>
14 #error UNKNOWN CPU TYPE
19 * These are for ISA/PCI shared memory _only_ and should never be used
20 * on any other type of memory, including Zorro memory. They are meant to
21 * access the bus in the bus byte order which is little-endian!.
23 * readX/writeX() are used to access memory mapped devices. On some
24 * architectures the memory mapped IO stuff needs to be accessed
25 * differently. On the m68k architecture, we just read/write the
26 * memory location directly.
28 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
29 * two accesses to memory, which may be undesireable for some devices.
33 * swap functions are sometimes needed to interface little-endian hardware
36 static inline unsigned short _swapw(volatile unsigned short v)
38 #ifndef H8300_IO_NOSWAP
40 __asm__("xor.b %w0,%x0\n\t"
51 static inline unsigned long _swapl(volatile unsigned long v)
53 #ifndef H8300_IO_NOSWAP
55 __asm__("xor.b %w0,%x0\n\t"
73 ({ unsigned char __v = (*(volatile unsigned char *) ((addr) & 0x00ffffff)); __v; })
75 ({ unsigned short __v = (*(volatile unsigned short *) ((addr) & 0x00ffffff)); __v; })
77 ({ unsigned int __v = (*(volatile unsigned int *) ((addr) & 0x00ffffff)); __v; })
79 #define writeb(b,addr) (void)((*(volatile unsigned char *) ((addr) & 0x00ffffff)) = (b))
80 #define writew(b,addr) (void)((*(volatile unsigned short *) ((addr) & 0x00ffffff)) = (b))
81 #define writel(b,addr) (void)((*(volatile unsigned int *) ((addr) & 0x00ffffff)) = (b))
82 #define readb_relaxed(addr) readb(addr)
83 #define readw_relaxed(addr) readw(addr)
84 #define readl_relaxed(addr) readl(addr)
86 #define __raw_readb readb
87 #define __raw_readw readw
88 #define __raw_readl readl
89 #define __raw_writeb writeb
90 #define __raw_writew writew
91 #define __raw_writel writel
93 static inline int h8300_buswidth(unsigned int addr)
95 return (*(volatile unsigned char *)ABWCR & (1 << ((addr >> 21) & 7))) == 0;
98 static inline void io_outsb(unsigned int addr, const void *buf, int len)
100 volatile unsigned char *ap_b = (volatile unsigned char *) addr;
101 volatile unsigned short *ap_w = (volatile unsigned short *) addr;
102 unsigned char *bp = (unsigned char *) buf;
104 if(h8300_buswidth(addr) && (addr & 1)) {
113 static inline void io_outsw(unsigned int addr, const void *buf, int len)
115 volatile unsigned short *ap = (volatile unsigned short *) addr;
116 unsigned short *bp = (unsigned short *) buf;
121 static inline void io_outsl(unsigned int addr, const void *buf, int len)
123 volatile unsigned long *ap = (volatile unsigned long *) addr;
124 unsigned long *bp = (unsigned long *) buf;
129 static inline void io_outsw_noswap(unsigned int addr, const void *buf, int len)
131 volatile unsigned short *ap = (volatile unsigned short *) addr;
132 unsigned short *bp = (unsigned short *) buf;
137 static inline void io_outsl_noswap(unsigned int addr, const void *buf, int len)
139 volatile unsigned long *ap = (volatile unsigned long *) addr;
140 unsigned long *bp = (unsigned long *) buf;
145 static inline void io_insb(unsigned int addr, void *buf, int len)
147 volatile unsigned char *ap_b;
148 volatile unsigned short *ap_w;
149 unsigned char *bp = (unsigned char *) buf;
151 if(h8300_buswidth(addr)) {
152 ap_w = (volatile unsigned short *)(addr & ~1);
154 *bp++ = *ap_w & 0xff;
156 ap_b = (volatile unsigned char *)addr;
162 static inline void io_insw(unsigned int addr, void *buf, int len)
164 volatile unsigned short *ap = (volatile unsigned short *) addr;
165 unsigned short *bp = (unsigned short *) buf;
170 static inline void io_insl(unsigned int addr, void *buf, int len)
172 volatile unsigned long *ap = (volatile unsigned long *) addr;
173 unsigned long *bp = (unsigned long *) buf;
178 static inline void io_insw_noswap(unsigned int addr, void *buf, int len)
180 volatile unsigned short *ap = (volatile unsigned short *) addr;
181 unsigned short *bp = (unsigned short *) buf;
186 static inline void io_insl_noswap(unsigned int addr, void *buf, int len)
188 volatile unsigned long *ap = (volatile unsigned long *) addr;
189 unsigned long *bp = (unsigned long *) buf;
195 * make the short names macros so specific devices
196 * can override them as required
199 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
200 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
201 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
203 #define inb(addr) ((h8300_buswidth(addr))?readw((addr) & ~1) & 0xff:readb(addr))
204 #define inw(addr) _swapw(readw(addr))
205 #define inl(addr) _swapl(readl(addr))
206 #define outb(x,addr) ((void)((h8300_buswidth(addr) && \
207 ((addr) & 1))?writew(x,(addr) & ~1):writeb(x,addr)))
208 #define outw(x,addr) ((void) writew(_swapw(x),addr))
209 #define outl(x,addr) ((void) writel(_swapl(x),addr))
211 #define inb_p(addr) inb(addr)
212 #define inw_p(addr) inw(addr)
213 #define inl_p(addr) inl(addr)
214 #define outb_p(x,addr) outb(x,addr)
215 #define outw_p(x,addr) outw(x,addr)
216 #define outl_p(x,addr) outl(x,addr)
218 #define outsb(a,b,l) io_outsb(a,b,l)
219 #define outsw(a,b,l) io_outsw(a,b,l)
220 #define outsl(a,b,l) io_outsl(a,b,l)
222 #define insb(a,b,l) io_insb(a,b,l)
223 #define insw(a,b,l) io_insw(a,b,l)
224 #define insl(a,b,l) io_insl(a,b,l)
226 #define IO_SPACE_LIMIT 0xffffff
229 /* Values for nocacheflag and cmode */
230 #define IOMAP_FULL_CACHING 0
231 #define IOMAP_NOCACHE_SER 1
232 #define IOMAP_NOCACHE_NONSER 2
233 #define IOMAP_WRITETHROUGH 3
235 extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
236 extern void __iounmap(void *addr, unsigned long size);
238 static inline void *ioremap(unsigned long physaddr, unsigned long size)
240 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
242 static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
244 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
246 static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size)
248 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
250 static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
252 return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
255 extern void iounmap(void *addr);
259 #define dma_cache_inv(_start,_size) do { } while (0)
260 #define dma_cache_wback(_start,_size) do { } while (0)
261 #define dma_cache_wback_inv(_start,_size) do { } while (0)
263 /* H8/300 internal I/O functions */
264 static __inline__ unsigned char ctrl_inb(unsigned long addr)
266 return *(volatile unsigned char*)addr;
269 static __inline__ unsigned short ctrl_inw(unsigned long addr)
271 return *(volatile unsigned short*)addr;
274 static __inline__ unsigned long ctrl_inl(unsigned long addr)
276 return *(volatile unsigned long*)addr;
279 static __inline__ void ctrl_outb(unsigned char b, unsigned long addr)
281 *(volatile unsigned char*)addr = b;
284 static __inline__ void ctrl_outw(unsigned short b, unsigned long addr)
286 *(volatile unsigned short*)addr = b;
289 static __inline__ void ctrl_outl(unsigned long b, unsigned long addr)
291 *(volatile unsigned long*)addr = b;
294 /* Pages to physical address... */
295 #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
296 #define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT)
299 * Macros used for converting between virtual and physical mappings.
301 #define mm_ptov(vaddr) ((void *) (vaddr))
302 #define mm_vtop(vaddr) ((unsigned long) (vaddr))
303 #define phys_to_virt(vaddr) ((void *) (vaddr))
304 #define virt_to_phys(vaddr) ((unsigned long) (vaddr))
306 #define virt_to_bus virt_to_phys
307 #define bus_to_virt phys_to_virt
309 #endif /* __KERNEL__ */
311 #endif /* _H8300_IO_H */