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 PARALLEL_BASE   0x378
  15 #define PNPBIOS_BASE    0xf000  /* only relevant for PReP */
  16
  17 #ifndef CONFIG_PPC64
  18 #include <asm-ppc/io.h>
  19 #else
  20
  21 #include <linux/compiler.h>
  22 #include <asm/page.h>
  23 #include <asm/byteorder.h>
  24 #include <asm/paca.h>
  25 #include <asm/synch.h>
  26 #include <asm/delay.h>
  27
  28 #include <asm-generic/iomap.h>
  29
  30 #define SIO_CONFIG_RA   0x398
  31 #define SIO_CONFIG_RD   0x399
  32
  33 #define SLOW_DOWN_IO
  34
  35 extern unsigned long isa_io_base;
  36 extern unsigned long pci_io_base;
  37
  38 #ifdef CONFIG_PPC_ISERIES
  39
  40 extern int in_8(const volatile unsigned char __iomem *addr);
  41 extern void out_8(volatile unsigned char __iomem *addr, int val);
  42 extern int in_le16(const volatile unsigned short __iomem *addr);
  43 extern int in_be16(const volatile unsigned short __iomem *addr);
  44 extern void out_le16(volatile unsigned short __iomem *addr, int val);
  45 extern void out_be16(volatile unsigned short __iomem *addr, int val);
  46 extern unsigned in_le32(const volatile unsigned __iomem *addr);
  47 extern unsigned in_be32(const volatile unsigned __iomem *addr);
  48 extern void out_le32(volatile unsigned __iomem *addr, int val);
  49 extern void out_be32(volatile unsigned __iomem *addr, int val);
  50 extern unsigned long in_le64(const volatile unsigned long __iomem *addr);
  51 extern unsigned long in_be64(const volatile unsigned long __iomem *addr);
  52 extern void out_le64(volatile unsigned long __iomem *addr, unsigned long val);
  53 extern void out_be64(volatile unsigned long __iomem *addr, unsigned long val);
  54
  55 extern unsigned char __raw_readb(const volatile void __iomem *addr);
  56 extern unsigned short __raw_readw(const volatile void __iomem *addr);
  57 extern unsigned int __raw_readl(const volatile void __iomem *addr);
  58 extern unsigned long __raw_readq(const volatile void __iomem *addr);
  59 extern void __raw_writeb(unsigned char v, volatile void __iomem *addr);
  60 extern void __raw_writew(unsigned short v, volatile void __iomem *addr);
  61 extern void __raw_writel(unsigned int v, volatile void __iomem *addr);
  62 extern void __raw_writeq(unsigned long v, volatile void __iomem *addr);
  63
  64 extern void memset_io(volatile void __iomem *addr, int c, unsigned long n);
  65 extern void memcpy_fromio(void *dest, const volatile void __iomem *src,
  66                                  unsigned long n);
  67 extern void memcpy_toio(volatile void __iomem *dest, const void *src,
  68                                  unsigned long n);
  69
  70 #else /* CONFIG_PPC_ISERIES */
  71
  72 #define in_8(addr)              __in_8((addr))
  73 #define out_8(addr, val)        __out_8((addr), (val))
  74 #define in_le16(addr)           __in_le16((addr))
  75 #define in_be16(addr)           __in_be16((addr))
  76 #define out_le16(addr, val)     __out_le16((addr), (val))
  77 #define out_be16(addr, val)     __out_be16((addr), (val))
  78 #define in_le32(addr)           __in_le32((addr))
  79 #define in_be32(addr)           __in_be32((addr))
  80 #define out_le32(addr, val)     __out_le32((addr), (val))
  81 #define out_be32(addr, val)     __out_be32((addr), (val))
  82 #define in_le64(addr)           __in_le64((addr))
  83 #define in_be64(addr)           __in_be64((addr))
  84 #define out_le64(addr, val)     __out_le64((addr), (val))
  85 #define out_be64(addr, val)     __out_be64((addr), (val))
  86
  87 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  88 {
  89         return *(volatile unsigned char __force *)addr;
  90 }
  91 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  92 {
  93         return *(volatile unsigned short __force *)addr;
  94 }
  95 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  96 {
  97         return *(volatile unsigned int __force *)addr;
  98 }
  99 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
 100 {
 101         return *(volatile unsigned long __force *)addr;
 102 }
 103 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
 104 {
 105         *(volatile unsigned char __force *)addr = v;
 106 }
 107 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
 108 {
 109         *(volatile unsigned short __force *)addr = v;
 110 }
 111 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
 112 {
 113         *(volatile unsigned int __force *)addr = v;
 114 }
 115 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
 116 {
 117         *(volatile unsigned long __force *)addr = v;
 118 }
 119 #define memset_io(a,b,c)        eeh_memset_io((a),(b),(c))
 120 #define memcpy_fromio(a,b,c)    eeh_memcpy_fromio((a),(b),(c))
 121 #define memcpy_toio(a,b,c)      eeh_memcpy_toio((a),(b),(c))
 122
 123 #endif /* CONFIG_PPC_ISERIES */
 124
 125 /*
 126  * The insw/outsw/insl/outsl macros don't do byte-swapping.
 127  * They are only used in practice for transferring buffers which
 128  * are arrays of bytes, and byte-swapping is not appropriate in
 129  * that case.  - paulus */
 130 #define insb(port, buf, ns)     eeh_insb((port), (buf), (ns))
 131 #define insw(port, buf, ns)     eeh_insw_ns((port), (buf), (ns))
 132 #define insl(port, buf, nl)     eeh_insl_ns((port), (buf), (nl))
 133
 134 #define outsb(port, buf, ns)  _outsb((u8 __iomem *)((port)+pci_io_base), (buf), (ns))
 135 #define outsw(port, buf, ns)  _outsw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
 136 #define outsl(port, buf, nl)  _outsl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
 137
 138 #define readb(addr)             eeh_readb(addr)
 139 #define readw(addr)             eeh_readw(addr)
 140 #define readl(addr)             eeh_readl(addr)
 141 #define readq(addr)             eeh_readq(addr)
 142 #define writeb(data, addr)      eeh_writeb((data), (addr))
 143 #define writew(data, addr)      eeh_writew((data), (addr))
 144 #define writel(data, addr)      eeh_writel((data), (addr))
 145 #define writeq(data, addr)      eeh_writeq((data), (addr))
 146 #define inb(port)               eeh_inb((unsigned long)port)
 147 #define outb(val, port)         eeh_outb(val, (unsigned long)port)
 148 #define inw(port)               eeh_inw((unsigned long)port)
 149 #define outw(val, port)         eeh_outw(val, (unsigned long)port)
 150 #define inl(port)               eeh_inl((unsigned long)port)
 151 #define outl(val, port)         eeh_outl(val, (unsigned long)port)
 152
 153 #define readb_relaxed(addr) readb(addr)
 154 #define readw_relaxed(addr) readw(addr)
 155 #define readl_relaxed(addr) readl(addr)
 156 #define readq_relaxed(addr) readq(addr)
 157
 158 extern void _insb(volatile u8 __iomem *port, void *buf, long count);
 159 extern void _outsb(volatile u8 __iomem *port, const void *buf, long count);
 160 extern void _insw_ns(volatile u16 __iomem *port, void *buf, long count);
 161 extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count);
 162 extern void _insl_ns(volatile u32 __iomem *port, void *buf, long count);
 163 extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count);
 164
 165 static inline void mmiowb(void)
 166 {
 167         __asm__ __volatile__ ("sync" : : : "memory");
 168         get_paca()->io_sync = 0;
 169 }
 170
 171 /*
 172  * output pause versions need a delay at least for the
 173  * w83c105 ide controller in a p610.
 174  */
 175 #define inb_p(port)             inb(port)
 176 #define outb_p(val, port)       (udelay(1), outb((val), (port)))
 177 #define inw_p(port)             inw(port)
 178 #define outw_p(val, port)       (udelay(1), outw((val), (port)))
 179 #define inl_p(port)             inl(port)
 180 #define outl_p(val, port)       (udelay(1), outl((val), (port)))
 181
 182
 183 #define IO_SPACE_LIMIT ~(0UL)
 184
 185
 186 extern int __ioremap_explicit(unsigned long p_addr, unsigned long v_addr,
 187                               unsigned long size, unsigned long flags);
 188 extern void __iomem *__ioremap(unsigned long address, unsigned long size,
 189                        unsigned long flags);
 190
 191 /**
 192  * ioremap     -   map bus memory into CPU space
 193  * @address:   bus address of the memory
 194  * @size:      size of the resource to map
 195  *
 196  * ioremap performs a platform specific sequence of operations to
 197  * make bus memory CPU accessible via the readb/readw/readl/writeb/
 198  * writew/writel functions and the other mmio helpers. The returned
 199  * address is not guaranteed to be usable directly as a virtual
 200  * address.
 201  */
 202 extern void __iomem *ioremap(unsigned long address, unsigned long size);
 203
 204 #define ioremap_nocache(addr, size)     ioremap((addr), (size))
 205 extern int iounmap_explicit(volatile void __iomem *addr, unsigned long size);
 206 extern void iounmap(volatile void __iomem *addr);
 207 extern void __iomem * reserve_phb_iospace(unsigned long size);
 208
 209 /**
 210  *      virt_to_phys    -       map virtual addresses to physical
 211  *      @address: address to remap
 212  *
 213  *      The returned physical address is the physical (CPU) mapping for
 214  *      the memory address given. It is only valid to use this function on
 215  *      addresses directly mapped or allocated via kmalloc.
 216  *
 217  *      This function does not give bus mappings for DMA transfers. In
 218  *      almost all conceivable cases a device driver should not be using
 219  *      this function
 220  */
 221 static inline unsigned long virt_to_phys(volatile void * address)
 222 {
 223         return __pa((unsigned long)address);
 224 }
 225
 226 /**
 227  *      phys_to_virt    -       map physical address to virtual
 228  *      @address: address to remap
 229  *
 230  *      The returned virtual address is a current CPU mapping for
 231  *      the memory address given. It is only valid to use this function on
 232  *      addresses that have a kernel mapping
 233  *
 234  *      This function does not handle bus mappings for DMA transfers. In
 235  *      almost all conceivable cases a device driver should not be using
 236  *      this function
 237  */
 238 static inline void * phys_to_virt(unsigned long address)
 239 {
 240         return (void *)__va(address);
 241 }
 242
 243 /*
 244  * Change "struct page" to physical address.
 245  */
 246 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
 247
 248 /* We do NOT want virtual merging, it would put too much pressure on
 249  * our iommu allocator. Instead, we want drivers to be smart enough
 250  * to coalesce sglists that happen to have been mapped in a contiguous
 251  * way by the iommu
 252  */
 253 #define BIO_VMERGE_BOUNDARY     0
 254
 255 static inline void iosync(void)
 256 {
 257         __asm__ __volatile__ ("sync" : : : "memory");
 258 }
 259
 260 /* Enforce in-order execution of data I/O.
 261  * No distinction between read/write on PPC; use eieio for all three.
 262  */
 263 #define iobarrier_rw() eieio()
 264 #define iobarrier_r()  eieio()
 265 #define iobarrier_w()  eieio()
 266
 267 /*
 268  * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 269  * These routines do not perform EEH-related I/O address translation,
 270  * and should not be used directly by device drivers.  Use inb/readb
 271  * instead.
 272  */
 273 static inline int __in_8(const volatile unsigned char __iomem *addr)
 274 {
 275         int ret;
 276
 277         __asm__ __volatile__("sync; lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
 278                              : "=r" (ret) : "m" (*addr));
 279         return ret;
 280 }
 281
 282 static inline void __out_8(volatile unsigned char __iomem *addr, int val)
 283 {
 284         __asm__ __volatile__("sync; stb%U0%X0 %1,%0"
 285                              : "=m" (*addr) : "r" (val));
 286         get_paca()->io_sync = 1;
 287 }
 288
 289 static inline int __in_le16(const volatile unsigned short __iomem *addr)
 290 {
 291         int ret;
 292
 293         __asm__ __volatile__("sync; lhbrx %0,0,%1; twi 0,%0,0; isync"
 294                              : "=r" (ret) : "r" (addr), "m" (*addr));
 295         return ret;
 296 }
 297
 298 static inline int __in_be16(const volatile unsigned short __iomem *addr)
 299 {
 300         int ret;
 301
 302         __asm__ __volatile__("sync; lhz%U1%X1 %0,%1; twi 0,%0,0; isync"
 303                              : "=r" (ret) : "m" (*addr));
 304         return ret;
 305 }
 306
 307 static inline void __out_le16(volatile unsigned short __iomem *addr, int val)
 308 {
 309         __asm__ __volatile__("sync; sthbrx %1,0,%2"
 310                              : "=m" (*addr) : "r" (val), "r" (addr));
 311         get_paca()->io_sync = 1;
 312 }
 313
 314 static inline void __out_be16(volatile unsigned short __iomem *addr, int val)
 315 {
 316         __asm__ __volatile__("sync; sth%U0%X0 %1,%0"
 317                              : "=m" (*addr) : "r" (val));
 318         get_paca()->io_sync = 1;
 319 }
 320
 321 static inline unsigned __in_le32(const volatile unsigned __iomem *addr)
 322 {
 323         unsigned ret;
 324
 325         __asm__ __volatile__("sync; lwbrx %0,0,%1; twi 0,%0,0; isync"
 326                              : "=r" (ret) : "r" (addr), "m" (*addr));
 327         return ret;
 328 }
 329
 330 static inline unsigned __in_be32(const volatile unsigned __iomem *addr)
 331 {
 332         unsigned ret;
 333
 334         __asm__ __volatile__("sync; lwz%U1%X1 %0,%1; twi 0,%0,0; isync"
 335                              : "=r" (ret) : "m" (*addr));
 336         return ret;
 337 }
 338
 339 static inline void __out_le32(volatile unsigned __iomem *addr, int val)
 340 {
 341         __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr)
 342                              : "r" (val), "r" (addr));
 343         get_paca()->io_sync = 1;
 344 }
 345
 346 static inline void __out_be32(volatile unsigned __iomem *addr, int val)
 347 {
 348         __asm__ __volatile__("sync; stw%U0%X0 %1,%0"
 349                              : "=m" (*addr) : "r" (val));
 350         get_paca()->io_sync = 1;
 351 }
 352
 353 static inline unsigned long __in_le64(const volatile unsigned long __iomem *addr)
 354 {
 355         unsigned long tmp, ret;
 356
 357         __asm__ __volatile__(
 358                              "sync\n"
 359                              "ld %1,0(%2)\n"
 360                              "twi 0,%1,0\n"
 361                              "isync\n"
 362                              "rldimi %0,%1,5*8,1*8\n"
 363                              "rldimi %0,%1,3*8,2*8\n"
 364                              "rldimi %0,%1,1*8,3*8\n"
 365                              "rldimi %0,%1,7*8,4*8\n"
 366                              "rldicl %1,%1,32,0\n"
 367                              "rlwimi %0,%1,8,8,31\n"
 368                              "rlwimi %0,%1,24,16,23\n"
 369                              : "=r" (ret) , "=r" (tmp) : "b" (addr) , "m" (*addr));
 370         return ret;
 371 }
 372
 373 static inline unsigned long __in_be64(const volatile unsigned long __iomem *addr)
 374 {
 375         unsigned long ret;
 376
 377         __asm__ __volatile__("sync; ld%U1%X1 %0,%1; twi 0,%0,0; isync"
 378                              : "=r" (ret) : "m" (*addr));
 379         return ret;
 380 }
 381
 382 static inline void __out_le64(volatile unsigned long __iomem *addr, unsigned long val)
 383 {
 384         unsigned long tmp;
 385
 386         __asm__ __volatile__(
 387                              "rldimi %0,%1,5*8,1*8\n"
 388                              "rldimi %0,%1,3*8,2*8\n"
 389                              "rldimi %0,%1,1*8,3*8\n"
 390                              "rldimi %0,%1,7*8,4*8\n"
 391                              "rldicl %1,%1,32,0\n"
 392                              "rlwimi %0,%1,8,8,31\n"
 393                              "rlwimi %0,%1,24,16,23\n"
 394                              "sync\n"
 395                              "std %0,0(%3)"
 396                              : "=&r" (tmp) , "=&r" (val) : "1" (val) , "b" (addr) , "m" (*addr));
 397         get_paca()->io_sync = 1;
 398 }
 399
 400 static inline void __out_be64(volatile unsigned long __iomem *addr, unsigned long val)
 401 {
 402         __asm__ __volatile__("sync; std%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
 403         get_paca()->io_sync = 1;
 404 }
 405
 406 #include <asm/eeh.h>
 407
 408 /**
 409  *      check_signature         -       find BIOS signatures
 410  *      @io_addr: mmio address to check
 411  *      @signature:  signature block
 412  *      @length: length of signature
 413  *
 414  *      Perform a signature comparison with the mmio address io_addr. This
 415  *      address should have been obtained by ioremap.
 416  *      Returns 1 on a match.
 417  */
 418 static inline int check_signature(const volatile void __iomem * io_addr,
 419         const unsigned char *signature, int length)
 420 {
 421         int retval = 0;
 422         do {
 423                 if (readb(io_addr) != *signature)
 424                         goto out;
 425                 io_addr++;
 426                 signature++;
 427                 length--;
 428         } while (length);
 429         retval = 1;
 430 out:
 431         return retval;
 432 }
 433
 434 /* Nothing to do */
 435
 436 #define dma_cache_inv(_start,_size)             do { } while (0)
 437 #define dma_cache_wback(_start,_size)           do { } while (0)
 438 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 439
 440
 441 /*
 442  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 443  * access
 444  */
 445 #define xlate_dev_mem_ptr(p)    __va(p)
 446
 447 /*
 448  * Convert a virtual cached pointer to an uncached pointer
 449  */
 450 #define xlate_dev_kmem_ptr(p)   p
 451
 452 #endif /* __KERNEL__ */
 453
 454 #endif /* CONFIG_PPC64 */
 455 #endif /* _ASM_POWERPC_IO_H */