6 * read{b,w,l}/write{b,w,l} are for PCI,
7 * while in{b,w,l}/out{b,w,l} are for ISA
8 * These may (will) be platform specific function.
9 * In addition we have 'pausing' versions: in{b,w,l}_p/out{b,w,l}_p
10 * and 'string' versions: ins{b,w,l}/outs{b,w,l}
11 * For read{b,w,l} and write{b,w,l} there are also __raw versions, which
12 * do not have a memory barrier after them.
14 * In addition, we have
15 * ctrl_in{b,w,l}/ctrl_out{b,w,l} for SuperH specific I/O.
16 * which are processor specific.
20 * We follow the Alpha convention here:
21 * __inb expands to an inline function call (which calls via the mv)
22 * _inb is a real function call (note ___raw fns are _ version of __raw)
23 * inb by default expands to _inb, but the machine specific code may
24 * define it to __inb if it chooses.
26 #include <asm/cache.h>
27 #include <asm/system.h>
28 #include <asm/addrspace.h>
29 #include <asm/machvec.h>
30 #include <asm/pgtable.h>
31 #include <asm-generic/iomap.h>
36 * Depending on which platform we are running on, we need different
39 #define __IO_PREFIX generic
40 #include <asm/io_generic.h>
41 #include <asm/io_trapped.h>
43 #define maybebadio(port) \
44 printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \
45 __FUNCTION__, __LINE__, (port), (u32)__builtin_return_address(0))
48 * Since boards are able to define their own set of I/O routines through
49 * their respective machine vector, we always wrap through the mv.
51 * Also, in the event that a board hasn't provided its own definition for
52 * a given routine, it will be wrapped to generic code at run-time.
55 #define __inb(p) sh_mv.mv_inb((p))
56 #define __inw(p) sh_mv.mv_inw((p))
57 #define __inl(p) sh_mv.mv_inl((p))
58 #define __outb(x,p) sh_mv.mv_outb((x),(p))
59 #define __outw(x,p) sh_mv.mv_outw((x),(p))
60 #define __outl(x,p) sh_mv.mv_outl((x),(p))
62 #define __inb_p(p) sh_mv.mv_inb_p((p))
63 #define __inw_p(p) sh_mv.mv_inw_p((p))
64 #define __inl_p(p) sh_mv.mv_inl_p((p))
65 #define __outb_p(x,p) sh_mv.mv_outb_p((x),(p))
66 #define __outw_p(x,p) sh_mv.mv_outw_p((x),(p))
67 #define __outl_p(x,p) sh_mv.mv_outl_p((x),(p))
69 #define __insb(p,b,c) sh_mv.mv_insb((p), (b), (c))
70 #define __insw(p,b,c) sh_mv.mv_insw((p), (b), (c))
71 #define __insl(p,b,c) sh_mv.mv_insl((p), (b), (c))
72 #define __outsb(p,b,c) sh_mv.mv_outsb((p), (b), (c))
73 #define __outsw(p,b,c) sh_mv.mv_outsw((p), (b), (c))
74 #define __outsl(p,b,c) sh_mv.mv_outsl((p), (b), (c))
76 #define __readb(a) sh_mv.mv_readb((a))
77 #define __readw(a) sh_mv.mv_readw((a))
78 #define __readl(a) sh_mv.mv_readl((a))
79 #define __writeb(v,a) sh_mv.mv_writeb((v),(a))
80 #define __writew(v,a) sh_mv.mv_writew((v),(a))
81 #define __writel(v,a) sh_mv.mv_writel((v),(a))
93 #define outb_p __outb_p
94 #define outw_p __outw_p
95 #define outl_p __outl_p
100 #define outsb __outsb
101 #define outsw __outsw
102 #define outsl __outsl
104 #define __raw_readb(a) __readb((void __iomem *)(a))
105 #define __raw_readw(a) __readw((void __iomem *)(a))
106 #define __raw_readl(a) __readl((void __iomem *)(a))
107 #define __raw_writeb(v, a) __writeb(v, (void __iomem *)(a))
108 #define __raw_writew(v, a) __writew(v, (void __iomem *)(a))
109 #define __raw_writel(v, a) __writel(v, (void __iomem *)(a))
111 void __raw_writesl(unsigned long addr, const void *data, int longlen);
112 void __raw_readsl(unsigned long addr, void *data, int longlen);
115 * The platform header files may define some of these macros to use
116 * the inlined versions where appropriate. These macros may also be
117 * redefined by userlevel programs.
120 # define readb(a) ({ unsigned int r_ = __raw_readb(a); mb(); r_; })
123 # define readw(a) ({ unsigned int r_ = __raw_readw(a); mb(); r_; })
126 # define readl(a) ({ unsigned int r_ = __raw_readl(a); mb(); r_; })
130 # define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); })
133 # define writew(v,a) ({ __raw_writew((v),(a)); mb(); })
136 # define writel(v,a) ({ __raw_writel((v),(a)); mb(); })
139 #define __BUILD_MEMORY_STRING(bwlq, type) \
141 static inline void writes##bwlq(volatile void __iomem *mem, \
142 const void *addr, unsigned int count) \
144 const volatile type *__addr = addr; \
147 __raw_write##bwlq(*__addr, mem); \
152 static inline void reads##bwlq(volatile void __iomem *mem, void *addr, \
153 unsigned int count) \
155 volatile type *__addr = addr; \
158 *__addr = __raw_read##bwlq(mem); \
163 __BUILD_MEMORY_STRING(b, u8)
164 __BUILD_MEMORY_STRING(w, u16)
165 #define writesl __raw_writesl
166 #define readsl __raw_readsl
168 #define readb_relaxed(a) readb(a)
169 #define readw_relaxed(a) readw(a)
170 #define readl_relaxed(a) readl(a)
173 #define ioread8(a) readb(a)
174 #define ioread16(a) readw(a)
175 #define ioread16be(a) be16_to_cpu(__raw_readw((a)))
176 #define ioread32(a) readl(a)
177 #define ioread32be(a) be32_to_cpu(__raw_readl((a)))
179 #define iowrite8(v,a) writeb((v),(a))
180 #define iowrite16(v,a) writew((v),(a))
181 #define iowrite16be(v,a) __raw_writew(cpu_to_be16((v)),(a))
182 #define iowrite32(v,a) writel((v),(a))
183 #define iowrite32be(v,a) __raw_writel(cpu_to_be32((v)),(a))
185 #define ioread8_rep(a, d, c) readsb((a), (d), (c))
186 #define ioread16_rep(a, d, c) readsw((a), (d), (c))
187 #define ioread32_rep(a, d, c) readsl((a), (d), (c))
189 #define iowrite8_rep(a, s, c) writesb((a), (s), (c))
190 #define iowrite16_rep(a, s, c) writesw((a), (s), (c))
191 #define iowrite32_rep(a, s, c) writesl((a), (s), (c))
193 #define mmiowb() wmb() /* synco on SH-4A, otherwise a nop */
195 #define IO_SPACE_LIMIT 0xffffffff
198 * This function provides a method for the generic case where a board-specific
199 * ioport_map simply needs to return the port + some arbitrary port base.
201 * We use this at board setup time to implicitly set the port base, and
202 * as a result, we can use the generic ioport_map.
204 static inline void __set_io_port_base(unsigned long pbase)
206 extern unsigned long generic_io_base;
208 generic_io_base = pbase;
211 #define __ioport_map(p, n) sh_mv.mv_ioport_map((p), (n))
213 /* We really want to try and get these to memcpy etc */
214 extern void memcpy_fromio(void *, volatile void __iomem *, unsigned long);
215 extern void memcpy_toio(volatile void __iomem *, const void *, unsigned long);
216 extern void memset_io(volatile void __iomem *, int, unsigned long);
218 /* SuperH on-chip I/O functions */
219 static inline unsigned char ctrl_inb(unsigned long addr)
221 return *(volatile unsigned char*)addr;
224 static inline unsigned short ctrl_inw(unsigned long addr)
226 return *(volatile unsigned short*)addr;
229 static inline unsigned int ctrl_inl(unsigned long addr)
231 return *(volatile unsigned long*)addr;
234 static inline unsigned long long ctrl_inq(unsigned long addr)
236 return *(volatile unsigned long long*)addr;
239 static inline void ctrl_outb(unsigned char b, unsigned long addr)
241 *(volatile unsigned char*)addr = b;
244 static inline void ctrl_outw(unsigned short b, unsigned long addr)
246 *(volatile unsigned short*)addr = b;
249 static inline void ctrl_outl(unsigned int b, unsigned long addr)
251 *(volatile unsigned long*)addr = b;
254 static inline void ctrl_outq(unsigned long long b, unsigned long addr)
256 *(volatile unsigned long long*)addr = b;
259 static inline void ctrl_delay(void)
266 /* Quad-word real-mode I/O, don't ask.. */
267 unsigned long long peek_real_address_q(unsigned long long addr);
268 unsigned long long poke_real_address_q(unsigned long long addr,
269 unsigned long long val);
271 #if !defined(CONFIG_MMU)
272 #define virt_to_phys(address) ((unsigned long)(address))
273 #define phys_to_virt(address) ((void *)(address))
275 #define virt_to_phys(address) (__pa(address))
276 #define phys_to_virt(address) (__va(address))
280 * On 32-bit SH, we traditionally have the whole physical address space
281 * mapped at all times (as MIPS does), so "ioremap()" and "iounmap()" do
282 * not need to do anything but place the address in the proper segment.
283 * This is true for P1 and P2 addresses, as well as some P3 ones.
284 * However, most of the P3 addresses and newer cores using extended
285 * addressing need to map through page tables, so the ioremap()
286 * implementation becomes a bit more complicated.
288 * See arch/sh/mm/ioremap.c for additional notes on this.
290 * We cheat a bit and always return uncachable areas until we've fixed
291 * the drivers to handle caching properly.
293 * On the SH-5 the concept of segmentation in the 1:1 PXSEG sense simply
294 * doesn't exist, so everything must go through page tables.
297 void __iomem *__ioremap(unsigned long offset, unsigned long size,
298 unsigned long flags);
299 void __iounmap(void __iomem *addr);
301 /* arch/sh/mm/ioremap_64.c */
302 unsigned long onchip_remap(unsigned long addr, unsigned long size,
304 extern void onchip_unmap(unsigned long vaddr);
306 #define __ioremap(offset, size, flags) ((void __iomem *)(offset))
307 #define __iounmap(addr) do { } while (0)
308 #define onchip_remap(addr, size, name) (addr)
309 #define onchip_unmap(addr) do { } while (0)
310 #endif /* CONFIG_MMU */
312 static inline void __iomem *
313 __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
315 #ifdef CONFIG_SUPERH32
316 unsigned long last_addr = offset + size - 1;
320 ret = __ioremap_trapped(offset, size);
324 #ifdef CONFIG_SUPERH32
326 * For P1 and P2 space this is trivial, as everything is already
327 * mapped. Uncached access for P1 addresses are done through P2.
328 * In the P3 case or for addresses outside of the 29-bit space,
329 * mapping must be done by the PMB or by using page tables.
331 if (likely(PXSEG(offset) < P3SEG && PXSEG(last_addr) < P3SEG)) {
332 if (unlikely(flags & _PAGE_CACHABLE))
333 return (void __iomem *)P1SEGADDR(offset);
335 return (void __iomem *)P2SEGADDR(offset);
339 return __ioremap(offset, size, flags);
342 #define ioremap(offset, size) \
343 __ioremap_mode((offset), (size), 0)
344 #define ioremap_nocache(offset, size) \
345 __ioremap_mode((offset), (size), 0)
346 #define ioremap_cache(offset, size) \
347 __ioremap_mode((offset), (size), _PAGE_CACHABLE)
348 #define p3_ioremap(offset, size, flags) \
349 __ioremap((offset), (size), (flags))
350 #define iounmap(addr) \
354 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
357 #define xlate_dev_mem_ptr(p) __va(p)
360 * Convert a virtual cached pointer to an uncached pointer
362 #define xlate_dev_kmem_ptr(p) p
364 #endif /* __KERNEL__ */
366 #endif /* __ASM_SH_IO_H */