include/asm-ppc/io.h

   1 #ifdef __KERNEL__
   2 #ifndef _PPC_IO_H
   3 #define _PPC_IO_H
   4
   5 #include <linux/string.h>
   6 #include <linux/types.h>
   7
   8 #include <asm/page.h>
   9 #include <asm/byteorder.h>
  10 #include <asm/synch.h>
  11 #include <asm/mmu.h>
  12
  13 #define SIO_CONFIG_RA   0x398
  14 #define SIO_CONFIG_RD   0x399
  15
  16 #define SLOW_DOWN_IO
  17
  18 #define PMAC_ISA_MEM_BASE       0
  19 #define PMAC_PCI_DRAM_OFFSET    0
  20 #define CHRP_ISA_IO_BASE        0xf8000000
  21 #define CHRP_ISA_MEM_BASE       0xf7000000
  22 #define CHRP_PCI_DRAM_OFFSET    0
  23 #define PREP_ISA_IO_BASE        0x80000000
  24 #define PREP_ISA_MEM_BASE       0xc0000000
  25 #define PREP_PCI_DRAM_OFFSET    0x80000000
  26
  27 #if defined(CONFIG_4xx)
  28 #include <asm/ibm4xx.h>
  29 #elif defined(CONFIG_8xx)
  30 #include <asm/mpc8xx.h>
  31 #elif defined(CONFIG_8260)
  32 #include <asm/mpc8260.h>
  33 #elif defined(CONFIG_APUS) || !defined(CONFIG_PCI)
  34 #define _IO_BASE        0
  35 #define _ISA_MEM_BASE   0
  36 #define PCI_DRAM_OFFSET 0
  37 #else /* Everyone else */
  38 #define _IO_BASE        isa_io_base
  39 #define _ISA_MEM_BASE   isa_mem_base
  40 #define PCI_DRAM_OFFSET pci_dram_offset
  41 #endif /* Platform-dependent I/O */
  42
  43 #define ___IO_BASE ((void __iomem *)_IO_BASE)
  44 extern unsigned long isa_io_base;
  45 extern unsigned long isa_mem_base;
  46 extern unsigned long pci_dram_offset;
  47
  48 /*
  49  * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
  50  *
  51  * Read operations have additional twi & isync to make sure the read
  52  * is actually performed (i.e. the data has come back) before we start
  53  * executing any following instructions.
  54  */
  55 extern inline int in_8(const volatile unsigned char __iomem *addr)
  56 {
  57         int ret;
  58
  59         __asm__ __volatile__(
  60                 "sync; lbz%U1%X1 %0,%1;\n"
  61                 "twi 0,%0,0;\n"
  62                 "isync" : "=r" (ret) : "m" (*addr));
  63         return ret;
  64 }
  65
  66 extern inline void out_8(volatile unsigned char __iomem *addr, int val)
  67 {
  68         __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
  69 }
  70
  71 extern inline int in_le16(const volatile unsigned short __iomem *addr)
  72 {
  73         int ret;
  74
  75         __asm__ __volatile__("sync; lhbrx %0,0,%1;\n"
  76                              "twi 0,%0,0;\n"
  77                              "isync" : "=r" (ret) :
  78                               "r" (addr), "m" (*addr));
  79         return ret;
  80 }
  81
  82 extern inline int in_be16(const volatile unsigned short __iomem *addr)
  83 {
  84         int ret;
  85
  86         __asm__ __volatile__("sync; lhz%U1%X1 %0,%1;\n"
  87                              "twi 0,%0,0;\n"
  88                              "isync" : "=r" (ret) : "m" (*addr));
  89         return ret;
  90 }
  91
  92 extern inline void out_le16(volatile unsigned short __iomem *addr, int val)
  93 {
  94         __asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) :
  95                               "r" (val), "r" (addr));
  96 }
  97
  98 extern inline void out_be16(volatile unsigned short __iomem *addr, int val)
  99 {
 100         __asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
 101 }
 102
 103 extern inline unsigned in_le32(const volatile unsigned __iomem *addr)
 104 {
 105         unsigned ret;
 106
 107         __asm__ __volatile__("sync; lwbrx %0,0,%1;\n"
 108                              "twi 0,%0,0;\n"
 109                              "isync" : "=r" (ret) :
 110                              "r" (addr), "m" (*addr));
 111         return ret;
 112 }
 113
 114 extern inline unsigned in_be32(const volatile unsigned __iomem *addr)
 115 {
 116         unsigned ret;
 117
 118         __asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n"
 119                              "twi 0,%0,0;\n"
 120                              "isync" : "=r" (ret) : "m" (*addr));
 121         return ret;
 122 }
 123
 124 extern inline void out_le32(volatile unsigned __iomem *addr, int val)
 125 {
 126         __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) :
 127                              "r" (val), "r" (addr));
 128 }
 129
 130 extern inline void out_be32(volatile unsigned __iomem *addr, int val)
 131 {
 132         __asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
 133 }
 134 #if defined (CONFIG_8260_PCI9)
 135 #define readb(addr) in_8((volatile u8 *)(addr))
 136 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
 137 #else
 138 static inline __u8 readb(const volatile void __iomem *addr)
 139 {
 140         return in_8(addr);
 141 }
 142 static inline void writeb(__u8 b, volatile void __iomem *addr)
 143 {
 144         out_8(addr, b);
 145 }
 146 #endif
 147
 148 #if defined(CONFIG_APUS)
 149 static inline __u16 readw(const volatile void __iomem *addr)
 150 {
 151         return *(__force volatile __u16 *)(addr);
 152 }
 153 static inline __u32 readl(const volatile void __iomem *addr)
 154 {
 155         return *(__force volatile __u32 *)(addr);
 156 }
 157 static inline void writew(__u16 b, volatile void __iomem *addr)
 158 {
 159         *(__force volatile __u16 *)(addr) = b;
 160 }
 161 static inline void writel(__u32 b, volatile void __iomem *addr)
 162 {
 163         *(__force volatile __u32 *)(addr) = b;
 164 }
 165 #elif defined (CONFIG_8260_PCI9)
 166 /* Use macros if PCI9 workaround enabled */
 167 #define readw(addr) in_le16((volatile u16 *)(addr))
 168 #define readl(addr) in_le32((volatile u32 *)(addr))
 169 #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
 170 #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
 171 #else
 172 static inline __u16 readw(const volatile void __iomem *addr)
 173 {
 174         return in_le16(addr);
 175 }
 176 static inline __u32 readl(const volatile void __iomem *addr)
 177 {
 178         return in_le32(addr);
 179 }
 180 static inline void writew(__u16 b, volatile void __iomem *addr)
 181 {
 182         out_le16(addr, b);
 183 }
 184 static inline void writel(__u32 b, volatile void __iomem *addr)
 185 {
 186         out_le32(addr, b);
 187 }
 188 #endif /* CONFIG_APUS */
 189
 190 #define readb_relaxed(addr) readb(addr)
 191 #define readw_relaxed(addr) readw(addr)
 192 #define readl_relaxed(addr) readl(addr)
 193
 194 static inline __u8 __raw_readb(const volatile void __iomem *addr)
 195 {
 196         return *(__force volatile __u8 *)(addr);
 197 }
 198 static inline __u16 __raw_readw(const volatile void __iomem *addr)
 199 {
 200         return *(__force volatile __u16 *)(addr);
 201 }
 202 static inline __u32 __raw_readl(const volatile void __iomem *addr)
 203 {
 204         return *(__force volatile __u32 *)(addr);
 205 }
 206 static inline void __raw_writeb(__u8 b, volatile void __iomem *addr)
 207 {
 208         *(__force volatile __u8 *)(addr) = b;
 209 }
 210 static inline void __raw_writew(__u16 b, volatile void __iomem *addr)
 211 {
 212         *(__force volatile __u16 *)(addr) = b;
 213 }
 214 static inline void __raw_writel(__u32 b, volatile void __iomem *addr)
 215 {
 216         *(__force volatile __u32 *)(addr) = b;
 217 }
 218
 219 #define mmiowb()
 220
 221 /*
 222  * The insw/outsw/insl/outsl macros don't do byte-swapping.
 223  * They are only used in practice for transferring buffers which
 224  * are arrays of bytes, and byte-swapping is not appropriate in
 225  * that case.  - paulus
 226  */
 227 #define insb(port, buf, ns)     _insb((port)+___IO_BASE, (buf), (ns))
 228 #define outsb(port, buf, ns)    _outsb((port)+___IO_BASE, (buf), (ns))
 229 #define insw(port, buf, ns)     _insw_ns((port)+___IO_BASE, (buf), (ns))
 230 #define outsw(port, buf, ns)    _outsw_ns((port)+___IO_BASE, (buf), (ns))
 231 #define insl(port, buf, nl)     _insl_ns((port)+___IO_BASE, (buf), (nl))
 232 #define outsl(port, buf, nl)    _outsl_ns((port)+___IO_BASE, (buf), (nl))
 233
 234 #define readsb(a, b, n)         _insb((a), (b), (n))
 235 #define readsw(a, b, n)         _insw_ns((a), (b), (n))
 236 #define readsl(a, b, n)         _insl_ns((a), (b), (n))
 237 #define writesb(a, b, n)        _outsb((a),(b),(n))
 238 #define writesw(a, b, n)        _outsw_ns((a),(b),(n))
 239 #define writesl(a, b, n)        _outsl_ns((a),(b),(n))
 240
 241
 242 /*
 243  * On powermacs and 8xx we will get a machine check exception
 244  * if we try to read data from a non-existent I/O port. Because
 245  * the machine check is an asynchronous exception, it isn't
 246  * well-defined which instruction SRR0 will point to when the
 247  * exception occurs.
 248  * With the sequence below (twi; isync; nop), we have found that
 249  * the machine check occurs on one of the three instructions on
 250  * all PPC implementations tested so far.  The twi and isync are
 251  * needed on the 601 (in fact twi; sync works too), the isync and
 252  * nop are needed on 604[e|r], and any of twi, sync or isync will
 253  * work on 603[e], 750, 74xx.
 254  * The twi creates an explicit data dependency on the returned
 255  * value which seems to be needed to make the 601 wait for the
 256  * load to finish.
 257  */
 258
 259 #define __do_in_asm(name, op)                           \
 260 extern __inline__ unsigned int name(unsigned int port)  \
 261 {                                                       \
 262         unsigned int x;                                 \
 263         __asm__ __volatile__(                           \
 264                 "sync\n"                                \
 265                 "0:"    op "    %0,0,%1\n"              \
 266                 "1:     twi     0,%0,0\n"               \
 267                 "2:     isync\n"                        \
 268                 "3:     nop\n"                          \
 269                 "4:\n"                                  \
 270                 ".section .fixup,\"ax\"\n"              \
 271                 "5:     li      %0,-1\n"                \
 272                 "       b       4b\n"                   \
 273                 ".previous\n"                           \
 274                 ".section __ex_table,\"a\"\n"           \
 275                 "       .align  2\n"                    \
 276                 "       .long   0b,5b\n"                \
 277                 "       .long   1b,5b\n"                \
 278                 "       .long   2b,5b\n"                \
 279                 "       .long   3b,5b\n"                \
 280                 ".previous"                             \
 281                 : "=&r" (x)                             \
 282                 : "r" (port + ___IO_BASE));             \
 283         return x;                                       \
 284 }
 285
 286 #define __do_out_asm(name, op)                          \
 287 extern __inline__ void name(unsigned int val, unsigned int port) \
 288 {                                                       \
 289         __asm__ __volatile__(                           \
 290                 "sync\n"                                \
 291                 "0:" op " %0,0,%1\n"                    \
 292                 "1:     sync\n"                         \
 293                 "2:\n"                                  \
 294                 ".section __ex_table,\"a\"\n"           \
 295                 "       .align  2\n"                    \
 296                 "       .long   0b,2b\n"                \
 297                 "       .long   1b,2b\n"                \
 298                 ".previous"                             \
 299                 : : "r" (val), "r" (port + ___IO_BASE));        \
 300 }
 301
 302 __do_out_asm(outb, "stbx")
 303 #ifdef CONFIG_APUS
 304 __do_in_asm(inb, "lbzx")
 305 __do_in_asm(inw, "lhz%U1%X1")
 306 __do_in_asm(inl, "lwz%U1%X1")
 307 __do_out_asm(outl,"stw%U0%X0")
 308 __do_out_asm(outw, "sth%U0%X0")
 309 #elif defined (CONFIG_8260_PCI9)
 310 /* in asm cannot be defined if PCI9 workaround is used */
 311 #define inb(port)               in_8((port)+___IO_BASE)
 312 #define inw(port)               in_le16((port)+___IO_BASE)
 313 #define inl(port)               in_le32((port)+___IO_BASE)
 314 __do_out_asm(outw, "sthbrx")
 315 __do_out_asm(outl, "stwbrx")
 316 #else
 317 __do_in_asm(inb, "lbzx")
 318 __do_in_asm(inw, "lhbrx")
 319 __do_in_asm(inl, "lwbrx")
 320 __do_out_asm(outw, "sthbrx")
 321 __do_out_asm(outl, "stwbrx")
 322
 323 #endif
 324
 325 #define inb_p(port)             inb((port))
 326 #define outb_p(val, port)       outb((val), (port))
 327 #define inw_p(port)             inw((port))
 328 #define outw_p(val, port)       outw((val), (port))
 329 #define inl_p(port)             inl((port))
 330 #define outl_p(val, port)       outl((val), (port))
 331
 332 extern void _insb(const volatile u8 __iomem *addr, void *buf, long count);
 333 extern void _outsb(volatile u8 __iomem *addr,const void *buf,long count);
 334 extern void _insw_ns(const volatile u16 __iomem *addr, void *buf, long count);
 335 extern void _outsw_ns(volatile u16 __iomem *addr, const void *buf, long count);
 336 extern void _insl_ns(const volatile u32 __iomem *addr, void *buf, long count);
 337 extern void _outsl_ns(volatile u32 __iomem *addr, const void *buf, long count);
 338
 339
 340 #define IO_SPACE_LIMIT ~0
 341
 342 #if defined (CONFIG_8260_PCI9)
 343 #define memset_io(a,b,c)       memset((void *)(a),(b),(c))
 344 #define memcpy_fromio(a,b,c)   memcpy((a),(void *)(b),(c))
 345 #define memcpy_toio(a,b,c)     memcpy((void *)(a),(b),(c))
 346 #else
 347 static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
 348 {
 349         memset((void __force *)addr, val, count);
 350 }
 351 static inline void memcpy_fromio(void *dst,const volatile void __iomem *src, int count)
 352 {
 353         memcpy(dst, (void __force *) src, count);
 354 }
 355 static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
 356 {
 357         memcpy((void __force *) dst, src, count);
 358 }
 359 #endif
 360
 361 /*
 362  * Map in an area of physical address space, for accessing
 363  * I/O devices etc.
 364  */
 365 extern void __iomem *__ioremap(phys_addr_t address, unsigned long size,
 366                        unsigned long flags);
 367 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
 368 #ifdef CONFIG_44x
 369 extern void __iomem *ioremap64(unsigned long long address, unsigned long size);
 370 #endif
 371 #define ioremap_nocache(addr, size)     ioremap((addr), (size))
 372 extern void iounmap(volatile void __iomem *addr);
 373 extern unsigned long iopa(unsigned long addr);
 374 extern unsigned long mm_ptov(unsigned long addr) __attribute_const__;
 375 extern void io_block_mapping(unsigned long virt, phys_addr_t phys,
 376                              unsigned int size, int flags);
 377
 378 /*
 379  * The PCI bus is inherently Little-Endian.  The PowerPC is being
 380  * run Big-Endian.  Thus all values which cross the [PCI] barrier
 381  * must be endian-adjusted.  Also, the local DRAM has a different
 382  * address from the PCI point of view, thus buffer addresses also
 383  * have to be modified [mapped] appropriately.
 384  */
 385 extern inline unsigned long virt_to_bus(volatile void * address)
 386 {
 387 #ifndef CONFIG_APUS
 388         if (address == (void *)0)
 389                 return 0;
 390         return (unsigned long)address - KERNELBASE + PCI_DRAM_OFFSET;
 391 #else
 392         return iopa ((unsigned long) address);
 393 #endif
 394 }
 395
 396 extern inline void * bus_to_virt(unsigned long address)
 397 {
 398 #ifndef CONFIG_APUS
 399         if (address == 0)
 400                 return NULL;
 401         return (void *)(address - PCI_DRAM_OFFSET + KERNELBASE);
 402 #else
 403         return (void*) mm_ptov (address);
 404 #endif
 405 }
 406
 407 /*
 408  * Change virtual addresses to physical addresses and vv, for
 409  * addresses in the area where the kernel has the RAM mapped.
 410  */
 411 extern inline unsigned long virt_to_phys(volatile void * address)
 412 {
 413 #ifndef CONFIG_APUS
 414         return (unsigned long) address - KERNELBASE;
 415 #else
 416         return iopa ((unsigned long) address);
 417 #endif
 418 }
 419
 420 extern inline void * phys_to_virt(unsigned long address)
 421 {
 422 #ifndef CONFIG_APUS
 423         return (void *) (address + KERNELBASE);
 424 #else
 425         return (void*) mm_ptov (address);
 426 #endif
 427 }
 428
 429 /*
 430  * Change "struct page" to physical address.
 431  */
 432 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
 433 #define page_to_bus(page)       (page_to_phys(page) + PCI_DRAM_OFFSET)
 434
 435 /* Enforce in-order execution of data I/O.
 436  * No distinction between read/write on PPC; use eieio for all three.
 437  */
 438 #define iobarrier_rw() eieio()
 439 #define iobarrier_r()  eieio()
 440 #define iobarrier_w()  eieio()
 441
 442 /*
 443  * Here comes the ppc implementation of the IOMAP
 444  * interfaces.
 445  */
 446 static inline unsigned int ioread8(void __iomem *addr)
 447 {
 448         return readb(addr);
 449 }
 450
 451 static inline unsigned int ioread16(void __iomem *addr)
 452 {
 453         return readw(addr);
 454 }
 455
 456 static inline unsigned int ioread32(void __iomem *addr)
 457 {
 458         return readl(addr);
 459 }
 460
 461 static inline void iowrite8(u8 val, void __iomem *addr)
 462 {
 463         writeb(val, addr);
 464 }
 465
 466 static inline void iowrite16(u16 val, void __iomem *addr)
 467 {
 468         writew(val, addr);
 469 }
 470
 471 static inline void iowrite32(u32 val, void __iomem *addr)
 472 {
 473         writel(val, addr);
 474 }
 475
 476 static inline void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
 477 {
 478         _insb(addr, dst, count);
 479 }
 480
 481 static inline void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
 482 {
 483         _insw_ns(addr, dst, count);
 484 }
 485
 486 static inline void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
 487 {
 488         _insl_ns(addr, dst, count);
 489 }
 490
 491 static inline void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
 492 {
 493         _outsb(addr, src, count);
 494 }
 495
 496 static inline void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
 497 {
 498         _outsw_ns(addr, src, count);
 499 }
 500
 501 static inline void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 502 {
 503         _outsl_ns(addr, src, count);
 504 }
 505
 506 /* Create a virtual mapping cookie for an IO port range */
 507 extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
 508 extern void ioport_unmap(void __iomem *);
 509
 510 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
 511 struct pci_dev;
 512 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
 513 extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
 514
 515 #endif /* _PPC_IO_H */
 516
 517 #ifdef CONFIG_8260_PCI9
 518 #include <asm/mpc8260_pci9.h>
 519 #endif
 520
 521 #ifdef CONFIG_NOT_COHERENT_CACHE
 522
 523 #define dma_cache_inv(_start,_size) \
 524         invalidate_dcache_range(_start, (_start + _size))
 525 #define dma_cache_wback(_start,_size) \
 526         clean_dcache_range(_start, (_start + _size))
 527 #define dma_cache_wback_inv(_start,_size) \
 528         flush_dcache_range(_start, (_start + _size))
 529
 530 #else
 531
 532 #define dma_cache_inv(_start,_size)             do { } while (0)
 533 #define dma_cache_wback(_start,_size)           do { } while (0)
 534 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 535
 536 #endif
 537
 538 /*
 539  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 540  * access
 541  */
 542 #define xlate_dev_mem_ptr(p)    __va(p)
 543
 544 /*
 545  * Convert a virtual cached pointer to an uncached pointer
 546  */
 547 #define xlate_dev_kmem_ptr(p)   p
 548
 549 /* access ports */
 550 #define setbits32(_addr, _v) out_be32((_addr), in_be32(_addr) |  (_v))
 551 #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v))
 552
 553 #define setbits16(_addr, _v) out_be16((_addr), in_be16(_addr) |  (_v))
 554 #define clrbits16(_addr, _v) out_be16((_addr), in_be16(_addr) & ~(_v))
 555
 556 #endif /* __KERNEL__ */