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
  15 #ifndef CONFIG_PPC64
  16 #include <asm-ppc/io.h>
  17 #else
  18
  19 #include <linux/compiler.h>
  20 #include <asm/page.h>
  21 #include <asm/byteorder.h>
  22 #include <asm/paca.h>
  23 #include <asm/synch.h>
  24 #include <asm/delay.h>
  25
  26 #include <asm-generic/iomap.h>
  27
  28 #define SIO_CONFIG_RA   0x398
  29 #define SIO_CONFIG_RD   0x399
  30
  31 #define SLOW_DOWN_IO
  32
  33 extern unsigned long isa_io_base;
  34 extern unsigned long pci_io_base;
  35
  36 #ifdef CONFIG_PPC_ISERIES
  37
  38 extern int in_8(const volatile unsigned char __iomem *addr);
  39 extern void out_8(volatile unsigned char __iomem *addr, int val);
  40 extern int in_le16(const volatile unsigned short __iomem *addr);
  41 extern int in_be16(const volatile unsigned short __iomem *addr);
  42 extern void out_le16(volatile unsigned short __iomem *addr, int val);
  43 extern void out_be16(volatile unsigned short __iomem *addr, int val);
  44 extern unsigned in_le32(const volatile unsigned __iomem *addr);
  45 extern unsigned in_be32(const volatile unsigned __iomem *addr);
  46 extern void out_le32(volatile unsigned __iomem *addr, int val);
  47 extern void out_be32(volatile unsigned __iomem *addr, int val);
  48 extern unsigned long in_le64(const volatile unsigned long __iomem *addr);
  49 extern unsigned long in_be64(const volatile unsigned long __iomem *addr);
  50 extern void out_le64(volatile unsigned long __iomem *addr, unsigned long val);
  51 extern void out_be64(volatile unsigned long __iomem *addr, unsigned long val);
  52
  53 extern unsigned char __raw_readb(const volatile void __iomem *addr);
  54 extern unsigned short __raw_readw(const volatile void __iomem *addr);
  55 extern unsigned int __raw_readl(const volatile void __iomem *addr);
  56 extern unsigned long __raw_readq(const volatile void __iomem *addr);
  57 extern void __raw_writeb(unsigned char v, volatile void __iomem *addr);
  58 extern void __raw_writew(unsigned short v, volatile void __iomem *addr);
  59 extern void __raw_writel(unsigned int v, volatile void __iomem *addr);
  60 extern void __raw_writeq(unsigned long v, volatile void __iomem *addr);
  61
  62 extern void memset_io(volatile void __iomem *addr, int c, unsigned long n);
  63 extern void memcpy_fromio(void *dest, const volatile void __iomem *src,
  64                                  unsigned long n);
  65 extern void memcpy_toio(volatile void __iomem *dest, const void *src,
  66                                  unsigned long n);
  67
  68 #else /* CONFIG_PPC_ISERIES */
  69
  70 #define in_8(addr)              __in_8((addr))
  71 #define out_8(addr, val)        __out_8((addr), (val))
  72 #define in_le16(addr)           __in_le16((addr))
  73 #define in_be16(addr)           __in_be16((addr))
  74 #define out_le16(addr, val)     __out_le16((addr), (val))
  75 #define out_be16(addr, val)     __out_be16((addr), (val))
  76 #define in_le32(addr)           __in_le32((addr))
  77 #define in_be32(addr)           __in_be32((addr))
  78 #define out_le32(addr, val)     __out_le32((addr), (val))
  79 #define out_be32(addr, val)     __out_be32((addr), (val))
  80 #define in_le64(addr)           __in_le64((addr))
  81 #define in_be64(addr)           __in_be64((addr))
  82 #define out_le64(addr, val)     __out_le64((addr), (val))
  83 #define out_be64(addr, val)     __out_be64((addr), (val))
  84
  85 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  86 {
  87         return *(volatile unsigned char __force *)addr;
  88 }
  89 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  90 {
  91         return *(volatile unsigned short __force *)addr;
  92 }
  93 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  94 {
  95         return *(volatile unsigned int __force *)addr;
  96 }
  97 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
  98 {
  99         return *(volatile unsigned long __force *)addr;
 100 }
 101 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
 102 {
 103         *(volatile unsigned char __force *)addr = v;
 104 }
 105 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
 106 {
 107         *(volatile unsigned short __force *)addr = v;
 108 }
 109 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
 110 {
 111         *(volatile unsigned int __force *)addr = v;
 112 }
 113 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
 114 {
 115         *(volatile unsigned long __force *)addr = v;
 116 }
 117 #define memset_io(a,b,c)        eeh_memset_io((a),(b),(c))
 118 #define memcpy_fromio(a,b,c)    eeh_memcpy_fromio((a),(b),(c))
 119 #define memcpy_toio(a,b,c)      eeh_memcpy_toio((a),(b),(c))
 120
 121 #endif /* CONFIG_PPC_ISERIES */
 122
 123 /*
 124  * The insw/outsw/insl/outsl macros don't do byte-swapping.
 125  * They are only used in practice for transferring buffers which
 126  * are arrays of bytes, and byte-swapping is not appropriate in
 127  * that case.  - paulus */
 128 #define insb(port, buf, ns)     eeh_insb((port), (buf), (ns))
 129 #define insw(port, buf, ns)     eeh_insw_ns((port), (buf), (ns))
 130 #define insl(port, buf, nl)     eeh_insl_ns((port), (buf), (nl))
 131
 132 #define outsb(port, buf, ns)  _outsb((u8 __iomem *)((port)+pci_io_base), (buf), (ns))
 133 #define outsw(port, buf, ns)  _outsw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
 134 #define outsl(port, buf, nl)  _outsl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
 135
 136 #define readb(addr)             eeh_readb(addr)
 137 #define readw(addr)             eeh_readw(addr)
 138 #define readl(addr)             eeh_readl(addr)
 139 #define readq(addr)             eeh_readq(addr)
 140 #define writeb(data, addr)      eeh_writeb((data), (addr))
 141 #define writew(data, addr)      eeh_writew((data), (addr))
 142 #define writel(data, addr)      eeh_writel((data), (addr))
 143 #define writeq(data, addr)      eeh_writeq((data), (addr))
 144 #define inb(port)               eeh_inb((unsigned long)port)
 145 #define outb(val, port)         eeh_outb(val, (unsigned long)port)
 146 #define inw(port)               eeh_inw((unsigned long)port)
 147 #define outw(val, port)         eeh_outw(val, (unsigned long)port)
 148 #define inl(port)               eeh_inl((unsigned long)port)
 149 #define outl(val, port)         eeh_outl(val, (unsigned long)port)
 150
 151 #define readb_relaxed(addr) readb(addr)
 152 #define readw_relaxed(addr) readw(addr)
 153 #define readl_relaxed(addr) readl(addr)
 154 #define readq_relaxed(addr) readq(addr)
 155
 156 extern void _insb(volatile u8 __iomem *port, void *buf, long count);
 157 extern void _outsb(volatile u8 __iomem *port, const void *buf, long count);
 158 extern void _insw_ns(volatile u16 __iomem *port, void *buf, long count);
 159 extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count);
 160 extern void _insl_ns(volatile u32 __iomem *port, void *buf, long count);
 161 extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count);
 162
 163 static inline void mmiowb(void)
 164 {
 165         __asm__ __volatile__ ("sync" : : : "memory");
 166         get_paca()->io_sync = 0;
 167 }
 168
 169 /*
 170  * output pause versions need a delay at least for the
 171  * w83c105 ide controller in a p610.
 172  */
 173 #define inb_p(port)             inb(port)
 174 #define outb_p(val, port)       (udelay(1), outb((val), (port)))
 175 #define inw_p(port)             inw(port)
 176 #define outw_p(val, port)       (udelay(1), outw((val), (port)))
 177 #define inl_p(port)             inl(port)
 178 #define outl_p(val, port)       (udelay(1), outl((val), (port)))
 179
 180
 181 #define IO_SPACE_LIMIT ~(0UL)
 182
 183
 184 extern int __ioremap_explicit(unsigned long p_addr, unsigned long v_addr,
 185                               unsigned long size, unsigned long flags);
 186 extern void __iomem *__ioremap(unsigned long address, unsigned long size,
 187                        unsigned long flags);
 188
 189 /**
 190  * ioremap     -   map bus memory into CPU space
 191  * @address:   bus address of the memory
 192  * @size:      size of the resource to map
 193  *
 194  * ioremap performs a platform specific sequence of operations to
 195  * make bus memory CPU accessible via the readb/readw/readl/writeb/
 196  * writew/writel functions and the other mmio helpers. The returned
 197  * address is not guaranteed to be usable directly as a virtual
 198  * address.
 199  */
 200 extern void __iomem *ioremap(unsigned long address, unsigned long size);
 201
 202 #define ioremap_nocache(addr, size)     ioremap((addr), (size))
 203 extern int iounmap_explicit(volatile void __iomem *addr, unsigned long size);
 204 extern void iounmap(volatile void __iomem *addr);
 205 extern void __iomem * reserve_phb_iospace(unsigned long size);
 206
 207 /**
 208  *      virt_to_phys    -       map virtual addresses to physical
 209  *      @address: address to remap
 210  *
 211  *      The returned physical address is the physical (CPU) mapping for
 212  *      the memory address given. It is only valid to use this function on
 213  *      addresses directly mapped or allocated via kmalloc.
 214  *
 215  *      This function does not give bus mappings for DMA transfers. In
 216  *      almost all conceivable cases a device driver should not be using
 217  *      this function
 218  */
 219 static inline unsigned long virt_to_phys(volatile void * address)
 220 {
 221         return __pa((unsigned long)address);
 222 }
 223
 224 /**
 225  *      phys_to_virt    -       map physical address to virtual
 226  *      @address: address to remap
 227  *
 228  *      The returned virtual address is a current CPU mapping for
 229  *      the memory address given. It is only valid to use this function on
 230  *      addresses that have a kernel mapping
 231  *
 232  *      This function does not handle bus mappings for DMA transfers. In
 233  *      almost all conceivable cases a device driver should not be using
 234  *      this function
 235  */
 236 static inline void * phys_to_virt(unsigned long address)
 237 {
 238         return (void *)__va(address);
 239 }
 240
 241 /*
 242  * Change "struct page" to physical address.
 243  */
 244 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
 245
 246 /* We do NOT want virtual merging, it would put too much pressure on
 247  * our iommu allocator. Instead, we want drivers to be smart enough
 248  * to coalesce sglists that happen to have been mapped in a contiguous
 249  * way by the iommu
 250  */
 251 #define BIO_VMERGE_BOUNDARY     0
 252
 253 static inline void iosync(void)
 254 {
 255         __asm__ __volatile__ ("sync" : : : "memory");
 256 }
 257
 258 /* Enforce in-order execution of data I/O.
 259  * No distinction between read/write on PPC; use eieio for all three.
 260  */
 261 #define iobarrier_rw() eieio()
 262 #define iobarrier_r()  eieio()
 263 #define iobarrier_w()  eieio()
 264
 265 /*
 266  * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 267  * These routines do not perform EEH-related I/O address translation,
 268  * and should not be used directly by device drivers.  Use inb/readb
 269  * instead.
 270  */
 271 static inline int __in_8(const volatile unsigned char __iomem *addr)
 272 {
 273         int ret;
 274
 275         __asm__ __volatile__("sync; lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
 276                              : "=r" (ret) : "m" (*addr));
 277         return ret;
 278 }
 279
 280 static inline void __out_8(volatile unsigned char __iomem *addr, int val)
 281 {
 282         __asm__ __volatile__("sync; stb%U0%X0 %1,%0"
 283                              : "=m" (*addr) : "r" (val));
 284         get_paca()->io_sync = 1;
 285 }
 286
 287 static inline int __in_le16(const volatile unsigned short __iomem *addr)
 288 {
 289         int ret;
 290
 291         __asm__ __volatile__("sync; lhbrx %0,0,%1; twi 0,%0,0; isync"
 292                              : "=r" (ret) : "r" (addr), "m" (*addr));
 293         return ret;
 294 }
 295
 296 static inline int __in_be16(const volatile unsigned short __iomem *addr)
 297 {
 298         int ret;
 299
 300         __asm__ __volatile__("sync; lhz%U1%X1 %0,%1; twi 0,%0,0; isync"
 301                              : "=r" (ret) : "m" (*addr));
 302         return ret;
 303 }
 304
 305 static inline void __out_le16(volatile unsigned short __iomem *addr, int val)
 306 {
 307         __asm__ __volatile__("sync; sthbrx %1,0,%2"
 308                              : "=m" (*addr) : "r" (val), "r" (addr));
 309         get_paca()->io_sync = 1;
 310 }
 311
 312 static inline void __out_be16(volatile unsigned short __iomem *addr, int val)
 313 {
 314         __asm__ __volatile__("sync; sth%U0%X0 %1,%0"
 315                              : "=m" (*addr) : "r" (val));
 316         get_paca()->io_sync = 1;
 317 }
 318
 319 static inline unsigned __in_le32(const volatile unsigned __iomem *addr)
 320 {
 321         unsigned ret;
 322
 323         __asm__ __volatile__("sync; lwbrx %0,0,%1; twi 0,%0,0; isync"
 324                              : "=r" (ret) : "r" (addr), "m" (*addr));
 325         return ret;
 326 }
 327
 328 static inline unsigned __in_be32(const volatile unsigned __iomem *addr)
 329 {
 330         unsigned ret;
 331
 332         __asm__ __volatile__("sync; lwz%U1%X1 %0,%1; twi 0,%0,0; isync"
 333                              : "=r" (ret) : "m" (*addr));
 334         return ret;
 335 }
 336
 337 static inline void __out_le32(volatile unsigned __iomem *addr, int val)
 338 {
 339         __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr)
 340                              : "r" (val), "r" (addr));
 341         get_paca()->io_sync = 1;
 342 }
 343
 344 static inline void __out_be32(volatile unsigned __iomem *addr, int val)
 345 {
 346         __asm__ __volatile__("sync; stw%U0%X0 %1,%0"
 347                              : "=m" (*addr) : "r" (val));
 348         get_paca()->io_sync = 1;
 349 }
 350
 351 static inline unsigned long __in_le64(const volatile unsigned long __iomem *addr)
 352 {
 353         unsigned long tmp, ret;
 354
 355         __asm__ __volatile__(
 356                              "sync\n"
 357                              "ld %1,0(%2)\n"
 358                              "twi 0,%1,0\n"
 359                              "isync\n"
 360                              "rldimi %0,%1,5*8,1*8\n"
 361                              "rldimi %0,%1,3*8,2*8\n"
 362                              "rldimi %0,%1,1*8,3*8\n"
 363                              "rldimi %0,%1,7*8,4*8\n"
 364                              "rldicl %1,%1,32,0\n"
 365                              "rlwimi %0,%1,8,8,31\n"
 366                              "rlwimi %0,%1,24,16,23\n"
 367                              : "=r" (ret) , "=r" (tmp) : "b" (addr) , "m" (*addr));
 368         return ret;
 369 }
 370
 371 static inline unsigned long __in_be64(const volatile unsigned long __iomem *addr)
 372 {
 373         unsigned long ret;
 374
 375         __asm__ __volatile__("sync; ld%U1%X1 %0,%1; twi 0,%0,0; isync"
 376                              : "=r" (ret) : "m" (*addr));
 377         return ret;
 378 }
 379
 380 static inline void __out_le64(volatile unsigned long __iomem *addr, unsigned long val)
 381 {
 382         unsigned long tmp;
 383
 384         __asm__ __volatile__(
 385                              "rldimi %0,%1,5*8,1*8\n"
 386                              "rldimi %0,%1,3*8,2*8\n"
 387                              "rldimi %0,%1,1*8,3*8\n"
 388                              "rldimi %0,%1,7*8,4*8\n"
 389                              "rldicl %1,%1,32,0\n"
 390                              "rlwimi %0,%1,8,8,31\n"
 391                              "rlwimi %0,%1,24,16,23\n"
 392                              "sync\n"
 393                              "std %0,0(%3)"
 394                              : "=&r" (tmp) , "=&r" (val) : "1" (val) , "b" (addr) , "m" (*addr));
 395         get_paca()->io_sync = 1;
 396 }
 397
 398 static inline void __out_be64(volatile unsigned long __iomem *addr, unsigned long val)
 399 {
 400         __asm__ __volatile__("sync; std%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
 401         get_paca()->io_sync = 1;
 402 }
 403
 404 #include <asm/eeh.h>
 405
 406 /**
 407  *      check_signature         -       find BIOS signatures
 408  *      @io_addr: mmio address to check
 409  *      @signature:  signature block
 410  *      @length: length of signature
 411  *
 412  *      Perform a signature comparison with the mmio address io_addr. This
 413  *      address should have been obtained by ioremap.
 414  *      Returns 1 on a match.
 415  */
 416 static inline int check_signature(const volatile void __iomem * io_addr,
 417         const unsigned char *signature, int length)
 418 {
 419         int retval = 0;
 420         do {
 421                 if (readb(io_addr) != *signature)
 422                         goto out;
 423                 io_addr++;
 424                 signature++;
 425                 length--;
 426         } while (length);
 427         retval = 1;
 428 out:
 429         return retval;
 430 }
 431
 432 /* Nothing to do */
 433
 434 #define dma_cache_inv(_start,_size)             do { } while (0)
 435 #define dma_cache_wback(_start,_size)           do { } while (0)
 436 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 437
 438
 439 /*
 440  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 441  * access
 442  */
 443 #define xlate_dev_mem_ptr(p)    __va(p)
 444
 445 /*
 446  * Convert a virtual cached pointer to an uncached pointer
 447  */
 448 #define xlate_dev_kmem_ptr(p)   p
 449
 450 #endif /* __KERNEL__ */
 451
 452 #endif /* CONFIG_PPC64 */
 453 #endif /* _ASM_POWERPC_IO_H */