include/asm-powerpc/io.h

   1 #ifndef _ASM_POWERPC_IO_H
   2 #define _ASM_POWERPC_IO_H
   3 #ifdef __KERNEL__
   4
   5 /*
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 /* Check of existence of legacy devices */
  13 extern int check_legacy_ioport(unsigned long base_port);
  14 #define PNPBIOS_BASE    0xf000  /* only relevant for PReP */
  15
  16 #ifndef CONFIG_PPC64
  17 #include <asm-ppc/io.h>
  18 #else
  19
  20 #include <linux/compiler.h>
  21 #include <asm/page.h>
  22 #include <asm/byteorder.h>
  23 #include <asm/paca.h>
  24 #include <asm/synch.h>
  25 #include <asm/delay.h>
  26
  27 #include <asm-generic/iomap.h>
  28
  29 #define SIO_CONFIG_RA   0x398
  30 #define SIO_CONFIG_RD   0x399
  31
  32 #define SLOW_DOWN_IO
  33
  34 extern unsigned long isa_io_base;
  35 extern unsigned long pci_io_base;
  36
  37 #ifdef CONFIG_PPC_ISERIES
  38
  39 extern int in_8(const volatile unsigned char __iomem *addr);
  40 extern void out_8(volatile unsigned char __iomem *addr, int val);
  41 extern int in_le16(const volatile unsigned short __iomem *addr);
  42 extern int in_be16(const volatile unsigned short __iomem *addr);
  43 extern void out_le16(volatile unsigned short __iomem *addr, int val);
  44 extern void out_be16(volatile unsigned short __iomem *addr, int val);
  45 extern unsigned in_le32(const volatile unsigned __iomem *addr);
  46 extern unsigned in_be32(const volatile unsigned __iomem *addr);
  47 extern void out_le32(volatile unsigned __iomem *addr, int val);
  48 extern void out_be32(volatile unsigned __iomem *addr, int val);
  49 extern unsigned long in_le64(const volatile unsigned long __iomem *addr);
  50 extern unsigned long in_be64(const volatile unsigned long __iomem *addr);
  51 extern void out_le64(volatile unsigned long __iomem *addr, unsigned long val);
  52 extern void out_be64(volatile unsigned long __iomem *addr, unsigned long val);
  53
  54 extern unsigned char __raw_readb(const volatile void __iomem *addr);
  55 extern unsigned short __raw_readw(const volatile void __iomem *addr);
  56 extern unsigned int __raw_readl(const volatile void __iomem *addr);
  57 extern unsigned long __raw_readq(const volatile void __iomem *addr);
  58 extern void __raw_writeb(unsigned char v, volatile void __iomem *addr);
  59 extern void __raw_writew(unsigned short v, volatile void __iomem *addr);
  60 extern void __raw_writel(unsigned int v, volatile void __iomem *addr);
  61 extern void __raw_writeq(unsigned long v, volatile void __iomem *addr);
  62
  63 extern void memset_io(volatile void __iomem *addr, int c, unsigned long n);
  64 extern void memcpy_fromio(void *dest, const volatile void __iomem *src,
  65                                  unsigned long n);
  66 extern void memcpy_toio(volatile void __iomem *dest, const void *src,
  67                                  unsigned long n);
  68
  69 #else /* CONFIG_PPC_ISERIES */
  70
  71 #define in_8(addr)              __in_8((addr))
  72 #define out_8(addr, val)        __out_8((addr), (val))
  73 #define in_le16(addr)           __in_le16((addr))
  74 #define in_be16(addr)           __in_be16((addr))
  75 #define out_le16(addr, val)     __out_le16((addr), (val))
  76 #define out_be16(addr, val)     __out_be16((addr), (val))
  77 #define in_le32(addr)           __in_le32((addr))
  78 #define in_be32(addr)           __in_be32((addr))
  79 #define out_le32(addr, val)     __out_le32((addr), (val))
  80 #define out_be32(addr, val)     __out_be32((addr), (val))
  81 #define in_le64(addr)           __in_le64((addr))
  82 #define in_be64(addr)           __in_be64((addr))
  83 #define out_le64(addr, val)     __out_le64((addr), (val))
  84 #define out_be64(addr, val)     __out_be64((addr), (val))
  85
  86 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  87 {
  88         return *(volatile unsigned char __force *)addr;
  89 }
  90 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  91 {
  92         return *(volatile unsigned short __force *)addr;
  93 }
  94 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  95 {
  96         return *(volatile unsigned int __force *)addr;
  97 }
  98 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
  99 {
 100         return *(volatile unsigned long __force *)addr;
 101 }
 102 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
 103 {
 104         *(volatile unsigned char __force *)addr = v;
 105 }
 106 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
 107 {
 108         *(volatile unsigned short __force *)addr = v;
 109 }
 110 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
 111 {
 112         *(volatile unsigned int __force *)addr = v;
 113 }
 114 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
 115 {
 116         *(volatile unsigned long __force *)addr = v;
 117 }
 118 #define memset_io(a,b,c)        eeh_memset_io((a),(b),(c))
 119 #define memcpy_fromio(a,b,c)    eeh_memcpy_fromio((a),(b),(c))
 120 #define memcpy_toio(a,b,c)      eeh_memcpy_toio((a),(b),(c))
 121
 122 #endif /* CONFIG_PPC_ISERIES */
 123
 124 /*
 125  * The insw/outsw/insl/outsl macros don't do byte-swapping.
 126  * They are only used in practice for transferring buffers which
 127  * are arrays of bytes, and byte-swapping is not appropriate in
 128  * that case.  - paulus */
 129 #define insb(port, buf, ns)     eeh_insb((port), (buf), (ns))
 130 #define insw(port, buf, ns)     eeh_insw_ns((port), (buf), (ns))
 131 #define insl(port, buf, nl)     eeh_insl_ns((port), (buf), (nl))
 132
 133 #define outsb(port, buf, ns)  _outsb((u8 __iomem *)((port)+pci_io_base), (buf), (ns))
 134 #define outsw(port, buf, ns)  _outsw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
 135 #define outsl(port, buf, nl)  _outsl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
 136
 137 #define readb(addr)             eeh_readb(addr)
 138 #define readw(addr)             eeh_readw(addr)
 139 #define readl(addr)             eeh_readl(addr)
 140 #define readq(addr)             eeh_readq(addr)
 141 #define writeb(data, addr)      eeh_writeb((data), (addr))
 142 #define writew(data, addr)      eeh_writew((data), (addr))
 143 #define writel(data, addr)      eeh_writel((data), (addr))
 144 #define writeq(data, addr)      eeh_writeq((data), (addr))
 145 #define inb(port)               eeh_inb((unsigned long)port)
 146 #define outb(val, port)         eeh_outb(val, (unsigned long)port)
 147 #define inw(port)               eeh_inw((unsigned long)port)
 148 #define outw(val, port)         eeh_outw(val, (unsigned long)port)
 149 #define inl(port)               eeh_inl((unsigned long)port)
 150 #define outl(val, port)         eeh_outl(val, (unsigned long)port)
 151
 152 #define readb_relaxed(addr) readb(addr)
 153 #define readw_relaxed(addr) readw(addr)
 154 #define readl_relaxed(addr) readl(addr)
 155 #define readq_relaxed(addr) readq(addr)
 156
 157 extern void _insb(volatile u8 __iomem *port, void *buf, long count);
 158 extern void _outsb(volatile u8 __iomem *port, const void *buf, long count);
 159 extern void _insw_ns(volatile u16 __iomem *port, void *buf, long count);
 160 extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count);
 161 extern void _insl_ns(volatile u32 __iomem *port, void *buf, long count);
 162 extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count);
 163
 164 static inline void mmiowb(void)
 165 {
 166         unsigned long tmp;
 167
 168         __asm__ __volatile__("sync; li %0,0; stb %0,%1(13)"
 169         : "=&r" (tmp) : "i" (offsetof(struct paca_struct, io_sync))
 170         : "memory");
 171 }
 172
 173 /*
 174  * output pause versions need a delay at least for the
 175  * w83c105 ide controller in a p610.
 176  */
 177 #define inb_p(port)             inb(port)
 178 #define outb_p(val, port)       (udelay(1), outb((val), (port)))
 179 #define inw_p(port)             inw(port)
 180 #define outw_p(val, port)       (udelay(1), outw((val), (port)))
 181 #define inl_p(port)             inl(port)
 182 #define outl_p(val, port)       (udelay(1), outl((val), (port)))
 183
 184
 185 #define IO_SPACE_LIMIT ~(0UL)
 186
 187
 188 extern int __ioremap_explicit(unsigned long p_addr, unsigned long v_addr,
 189                               unsigned long size, unsigned long flags);
 190 extern void __iomem *__ioremap(unsigned long address, unsigned long size,
 191                        unsigned long flags);
 192
 193 /**
 194  * ioremap     -   map bus memory into CPU space
 195  * @address:   bus address of the memory
 196  * @size:      size of the resource to map
 197  *
 198  * ioremap performs a platform specific sequence of operations to
 199  * make bus memory CPU accessible via the readb/readw/readl/writeb/
 200  * writew/writel functions and the other mmio helpers. The returned
 201  * address is not guaranteed to be usable directly as a virtual
 202  * address.
 203  */
 204 extern void __iomem *ioremap(unsigned long address, unsigned long size);
 205
 206 #define ioremap_nocache(addr, size)     ioremap((addr), (size))
 207 extern int iounmap_explicit(volatile void __iomem *addr, unsigned long size);
 208 extern void iounmap(volatile void __iomem *addr);
 209 extern void __iomem * reserve_phb_iospace(unsigned long size);
 210
 211 /**
 212  *      virt_to_phys    -       map virtual addresses to physical
 213  *      @address: address to remap
 214  *
 215  *      The returned physical address is the physical (CPU) mapping for
 216  *      the memory address given. It is only valid to use this function on
 217  *      addresses directly mapped or allocated via kmalloc.
 218  *
 219  *      This function does not give bus mappings for DMA transfers. In
 220  *      almost all conceivable cases a device driver should not be using
 221  *      this function
 222  */
 223 static inline unsigned long virt_to_phys(volatile void * address)
 224 {
 225         return __pa((unsigned long)address);
 226 }
 227
 228 /**
 229  *      phys_to_virt    -       map physical address to virtual
 230  *      @address: address to remap
 231  *
 232  *      The returned virtual address is a current CPU mapping for
 233  *      the memory address given. It is only valid to use this function on
 234  *      addresses that have a kernel mapping
 235  *
 236  *      This function does not handle bus mappings for DMA transfers. In
 237  *      almost all conceivable cases a device driver should not be using
 238  *      this function
 239  */
 240 static inline void * phys_to_virt(unsigned long address)
 241 {
 242         return (void *)__va(address);
 243 }
 244
 245 /*
 246  * Change "struct page" to physical address.
 247  */
 248 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
 249
 250 /* We do NOT want virtual merging, it would put too much pressure on
 251  * our iommu allocator. Instead, we want drivers to be smart enough
 252  * to coalesce sglists that happen to have been mapped in a contiguous
 253  * way by the iommu
 254  */
 255 #define BIO_VMERGE_BOUNDARY     0
 256
 257 static inline void iosync(void)
 258 {
 259         __asm__ __volatile__ ("sync" : : : "memory");
 260 }
 261
 262 /* Enforce in-order execution of data I/O.
 263  * No distinction between read/write on PPC; use eieio for all three.
 264  */
 265 #define iobarrier_rw() eieio()
 266 #define iobarrier_r()  eieio()
 267 #define iobarrier_w()  eieio()
 268
 269 /*
 270  * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 271  * These routines do not perform EEH-related I/O address translation,
 272  * and should not be used directly by device drivers.  Use inb/readb
 273  * instead.
 274  */
 275 static inline int __in_8(const volatile unsigned char __iomem *addr)
 276 {
 277         int ret;
 278
 279         __asm__ __volatile__("sync; lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
 280                              : "=r" (ret) : "m" (*addr));
 281         return ret;
 282 }
 283
 284 static inline void __out_8(volatile unsigned char __iomem *addr, int val)
 285 {
 286         __asm__ __volatile__("sync; stb%U0%X0 %1,%0"
 287                              : "=m" (*addr) : "r" (val));
 288         get_paca()->io_sync = 1;
 289 }
 290
 291 static inline int __in_le16(const volatile unsigned short __iomem *addr)
 292 {
 293         int ret;
 294
 295         __asm__ __volatile__("sync; lhbrx %0,0,%1; twi 0,%0,0; isync"
 296                              : "=r" (ret) : "r" (addr), "m" (*addr));
 297         return ret;
 298 }
 299
 300 static inline int __in_be16(const volatile unsigned short __iomem *addr)
 301 {
 302         int ret;
 303
 304         __asm__ __volatile__("sync; lhz%U1%X1 %0,%1; twi 0,%0,0; isync"
 305                              : "=r" (ret) : "m" (*addr));
 306         return ret;
 307 }
 308
 309 static inline void __out_le16(volatile unsigned short __iomem *addr, int val)
 310 {
 311         __asm__ __volatile__("sync; sthbrx %1,0,%2"
 312                              : "=m" (*addr) : "r" (val), "r" (addr));
 313         get_paca()->io_sync = 1;
 314 }
 315
 316 static inline void __out_be16(volatile unsigned short __iomem *addr, int val)
 317 {
 318         __asm__ __volatile__("sync; sth%U0%X0 %1,%0"
 319                              : "=m" (*addr) : "r" (val));
 320         get_paca()->io_sync = 1;
 321 }
 322
 323 static inline unsigned __in_le32(const volatile unsigned __iomem *addr)
 324 {
 325         unsigned ret;
 326
 327         __asm__ __volatile__("sync; lwbrx %0,0,%1; twi 0,%0,0; isync"
 328                              : "=r" (ret) : "r" (addr), "m" (*addr));
 329         return ret;
 330 }
 331
 332 static inline unsigned __in_be32(const volatile unsigned __iomem *addr)
 333 {
 334         unsigned ret;
 335
 336         __asm__ __volatile__("sync; lwz%U1%X1 %0,%1; twi 0,%0,0; isync"
 337                              : "=r" (ret) : "m" (*addr));
 338         return ret;
 339 }
 340
 341 static inline void __out_le32(volatile unsigned __iomem *addr, int val)
 342 {
 343         __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr)
 344                              : "r" (val), "r" (addr));
 345         get_paca()->io_sync = 1;
 346 }
 347
 348 static inline void __out_be32(volatile unsigned __iomem *addr, int val)
 349 {
 350         __asm__ __volatile__("sync; stw%U0%X0 %1,%0"
 351                              : "=m" (*addr) : "r" (val));
 352         get_paca()->io_sync = 1;
 353 }
 354
 355 static inline unsigned long __in_le64(const volatile unsigned long __iomem *addr)
 356 {
 357         unsigned long tmp, ret;
 358
 359         __asm__ __volatile__(
 360                              "sync\n"
 361                              "ld %1,0(%2)\n"
 362                              "twi 0,%1,0\n"
 363                              "isync\n"
 364                              "rldimi %0,%1,5*8,1*8\n"
 365                              "rldimi %0,%1,3*8,2*8\n"
 366                              "rldimi %0,%1,1*8,3*8\n"
 367                              "rldimi %0,%1,7*8,4*8\n"
 368                              "rldicl %1,%1,32,0\n"
 369                              "rlwimi %0,%1,8,8,31\n"
 370                              "rlwimi %0,%1,24,16,23\n"
 371                              : "=r" (ret) , "=r" (tmp) : "b" (addr) , "m" (*addr));
 372         return ret;
 373 }
 374
 375 static inline unsigned long __in_be64(const volatile unsigned long __iomem *addr)
 376 {
 377         unsigned long ret;
 378
 379         __asm__ __volatile__("sync; ld%U1%X1 %0,%1; twi 0,%0,0; isync"
 380                              : "=r" (ret) : "m" (*addr));
 381         return ret;
 382 }
 383
 384 static inline void __out_le64(volatile unsigned long __iomem *addr, unsigned long val)
 385 {
 386         unsigned long tmp;
 387
 388         __asm__ __volatile__(
 389                              "rldimi %0,%1,5*8,1*8\n"
 390                              "rldimi %0,%1,3*8,2*8\n"
 391                              "rldimi %0,%1,1*8,3*8\n"
 392                              "rldimi %0,%1,7*8,4*8\n"
 393                              "rldicl %1,%1,32,0\n"
 394                              "rlwimi %0,%1,8,8,31\n"
 395                              "rlwimi %0,%1,24,16,23\n"
 396                              "sync\n"
 397                              "std %0,0(%3)"
 398                              : "=&r" (tmp) , "=&r" (val) : "1" (val) , "b" (addr) , "m" (*addr));
 399         get_paca()->io_sync = 1;
 400 }
 401
 402 static inline void __out_be64(volatile unsigned long __iomem *addr, unsigned long val)
 403 {
 404         __asm__ __volatile__("sync; std%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
 405         get_paca()->io_sync = 1;
 406 }
 407
 408 #include <asm/eeh.h>
 409
 410 /* Nothing to do */
 411
 412 #define dma_cache_inv(_start,_size)             do { } while (0)
 413 #define dma_cache_wback(_start,_size)           do { } while (0)
 414 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 415
 416
 417 /*
 418  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 419  * access
 420  */
 421 #define xlate_dev_mem_ptr(p)    __va(p)
 422
 423 /*
 424  * Convert a virtual cached pointer to an uncached pointer
 425  */
 426 #define xlate_dev_kmem_ptr(p)   p
 427
 428 #endif /* __KERNEL__ */
 429
 430 #endif /* CONFIG_PPC64 */
 431 #endif /* _ASM_POWERPC_IO_H */