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 #ifdef CONFIG_PPC_ISERIES
  23 #include <asm/iseries/iseries_io.h>
  24 #endif
  25 #include <asm/synch.h>
  26 #include <asm/delay.h>
  27
  28 #include <asm-generic/iomap.h>
  29
  30 #define __ide_mm_insw(p, a, c) _insw_ns((volatile u16 __iomem *)(p), (a), (c))
  31 #define __ide_mm_insl(p, a, c) _insl_ns((volatile u32 __iomem *)(p), (a), (c))
  32 #define __ide_mm_outsw(p, a, c) _outsw_ns((volatile u16 __iomem *)(p), (a), (c))
  33 #define __ide_mm_outsl(p, a, c) _outsl_ns((volatile u32 __iomem *)(p), (a), (c))
  34
  35
  36 #define SIO_CONFIG_RA   0x398
  37 #define SIO_CONFIG_RD   0x399
  38
  39 #define SLOW_DOWN_IO
  40
  41 extern unsigned long isa_io_base;
  42 extern unsigned long pci_io_base;
  43 extern unsigned long io_page_mask;
  44
  45 #define MAX_ISA_PORT 0x10000
  46
  47 #define _IO_IS_VALID(port) ((port) >= MAX_ISA_PORT || (1 << (port>>PAGE_SHIFT)) \
  48                             & io_page_mask)
  49
  50 #ifdef CONFIG_PPC_ISERIES
  51 /* __raw_* accessors aren't supported on iSeries */
  52 #define __raw_readb(addr)       { BUG(); 0; }
  53 #define __raw_readw(addr)       { BUG(); 0; }
  54 #define __raw_readl(addr)       { BUG(); 0; }
  55 #define __raw_readq(addr)       { BUG(); 0; }
  56 #define __raw_writeb(v, addr)   { BUG(); 0; }
  57 #define __raw_writew(v, addr)   { BUG(); 0; }
  58 #define __raw_writel(v, addr)   { BUG(); 0; }
  59 #define __raw_writeq(v, addr)   { BUG(); 0; }
  60 #define readb(addr)             iSeries_Read_Byte(addr)
  61 #define readw(addr)             iSeries_Read_Word(addr)
  62 #define readl(addr)             iSeries_Read_Long(addr)
  63 #define writeb(data, addr)      iSeries_Write_Byte((data),(addr))
  64 #define writew(data, addr)      iSeries_Write_Word((data),(addr))
  65 #define writel(data, addr)      iSeries_Write_Long((data),(addr))
  66 #define memset_io(a,b,c)        iSeries_memset_io((a),(b),(c))
  67 #define memcpy_fromio(a,b,c)    iSeries_memcpy_fromio((a), (b), (c))
  68 #define memcpy_toio(a,b,c)      iSeries_memcpy_toio((a), (b), (c))
  69
  70 #define inb(addr)               readb(((void __iomem *)(long)(addr)))
  71 #define inw(addr)               readw(((void __iomem *)(long)(addr)))
  72 #define inl(addr)               readl(((void __iomem *)(long)(addr)))
  73 #define outb(data,addr)         writeb(data,((void __iomem *)(long)(addr)))
  74 #define outw(data,addr)         writew(data,((void __iomem *)(long)(addr)))
  75 #define outl(data,addr)         writel(data,((void __iomem *)(long)(addr)))
  76 /*
  77  * The *_ns versions below don't do byte-swapping.
  78  * Neither do the standard versions now, these are just here
  79  * for older code.
  80  */
  81 #define insw_ns(port, buf, ns)  _insw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
  82 #define insl_ns(port, buf, nl)  _insl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
  83 #else
  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 readb(addr)             eeh_readb(addr)
 118 #define readw(addr)             eeh_readw(addr)
 119 #define readl(addr)             eeh_readl(addr)
 120 #define readq(addr)             eeh_readq(addr)
 121 #define writeb(data, addr)      eeh_writeb((data), (addr))
 122 #define writew(data, addr)      eeh_writew((data), (addr))
 123 #define writel(data, addr)      eeh_writel((data), (addr))
 124 #define writeq(data, addr)      eeh_writeq((data), (addr))
 125 #define memset_io(a,b,c)        eeh_memset_io((a),(b),(c))
 126 #define memcpy_fromio(a,b,c)    eeh_memcpy_fromio((a),(b),(c))
 127 #define memcpy_toio(a,b,c)      eeh_memcpy_toio((a),(b),(c))
 128 #define inb(port)               eeh_inb((unsigned long)port)
 129 #define outb(val, port)         eeh_outb(val, (unsigned long)port)
 130 #define inw(port)               eeh_inw((unsigned long)port)
 131 #define outw(val, port)         eeh_outw(val, (unsigned long)port)
 132 #define inl(port)               eeh_inl((unsigned long)port)
 133 #define outl(val, port)         eeh_outl(val, (unsigned long)port)
 134
 135 /*
 136  * The insw/outsw/insl/outsl macros don't do byte-swapping.
 137  * They are only used in practice for transferring buffers which
 138  * are arrays of bytes, and byte-swapping is not appropriate in
 139  * that case.  - paulus */
 140 #define insb(port, buf, ns)     eeh_insb((port), (buf), (ns))
 141 #define insw(port, buf, ns)     eeh_insw_ns((port), (buf), (ns))
 142 #define insl(port, buf, nl)     eeh_insl_ns((port), (buf), (nl))
 143 #define insw_ns(port, buf, ns)  eeh_insw_ns((port), (buf), (ns))
 144 #define insl_ns(port, buf, nl)  eeh_insl_ns((port), (buf), (nl))
 145
 146 #define outsb(port, buf, ns)  _outsb((u8 __iomem *)((port)+pci_io_base), (buf), (ns))
 147 #define outsw(port, buf, ns)  _outsw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
 148 #define outsl(port, buf, nl)  _outsl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
 149
 150 #endif
 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, int ns);
 158 extern void _outsb(volatile u8 __iomem *port, const void *buf, int ns);
 159 extern void _insw(volatile u16 __iomem *port, void *buf, int ns);
 160 extern void _outsw(volatile u16 __iomem *port, const void *buf, int ns);
 161 extern void _insl(volatile u32 __iomem *port, void *buf, int nl);
 162 extern void _outsl(volatile u32 __iomem *port, const void *buf, int nl);
 163 extern void _insw_ns(volatile u16 __iomem *port, void *buf, int ns);
 164 extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, int ns);
 165 extern void _insl_ns(volatile u32 __iomem *port, void *buf, int nl);
 166 extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, int nl);
 167
 168 #define mmiowb()
 169
 170 /*
 171  * output pause versions need a delay at least for the
 172  * w83c105 ide controller in a p610.
 173  */
 174 #define inb_p(port)             inb(port)
 175 #define outb_p(val, port)       (udelay(1), outb((val), (port)))
 176 #define inw_p(port)             inw(port)
 177 #define outw_p(val, port)       (udelay(1), outw((val), (port)))
 178 #define inl_p(port)             inl(port)
 179 #define outl_p(val, port)       (udelay(1), outl((val), (port)))
 180
 181 /*
 182  * The *_ns versions below don't do byte-swapping.
 183  * Neither do the standard versions now, these are just here
 184  * for older code.
 185  */
 186 #define outsw_ns(port, buf, ns) _outsw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
 187 #define outsl_ns(port, buf, nl) _outsl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
 188
 189
 190 #define IO_SPACE_LIMIT ~(0UL)
 191
 192
 193 extern int __ioremap_explicit(unsigned long p_addr, unsigned long v_addr,
 194                               unsigned long size, unsigned long flags);
 195 extern void __iomem *__ioremap(unsigned long address, unsigned long size,
 196                        unsigned long flags);
 197
 198 /**
 199  * ioremap     -   map bus memory into CPU space
 200  * @address:   bus address of the memory
 201  * @size:      size of the resource to map
 202  *
 203  * ioremap performs a platform specific sequence of operations to
 204  * make bus memory CPU accessible via the readb/readw/readl/writeb/
 205  * writew/writel functions and the other mmio helpers. The returned
 206  * address is not guaranteed to be usable directly as a virtual
 207  * address.
 208  */
 209 extern void __iomem *ioremap(unsigned long address, unsigned long size);
 210
 211 #define ioremap_nocache(addr, size)     ioremap((addr), (size))
 212 extern int iounmap_explicit(volatile void __iomem *addr, unsigned long size);
 213 extern void iounmap(volatile void __iomem *addr);
 214 extern void __iomem * reserve_phb_iospace(unsigned long size);
 215
 216 /**
 217  *      virt_to_phys    -       map virtual addresses to physical
 218  *      @address: address to remap
 219  *
 220  *      The returned physical address is the physical (CPU) mapping for
 221  *      the memory address given. It is only valid to use this function on
 222  *      addresses directly mapped or allocated via kmalloc.
 223  *
 224  *      This function does not give bus mappings for DMA transfers. In
 225  *      almost all conceivable cases a device driver should not be using
 226  *      this function
 227  */
 228 static inline unsigned long virt_to_phys(volatile void * address)
 229 {
 230         return __pa((unsigned long)address);
 231 }
 232
 233 /**
 234  *      phys_to_virt    -       map physical address to virtual
 235  *      @address: address to remap
 236  *
 237  *      The returned virtual address is a current CPU mapping for
 238  *      the memory address given. It is only valid to use this function on
 239  *      addresses that have a kernel mapping
 240  *
 241  *      This function does not handle bus mappings for DMA transfers. In
 242  *      almost all conceivable cases a device driver should not be using
 243  *      this function
 244  */
 245 static inline void * phys_to_virt(unsigned long address)
 246 {
 247         return (void *)__va(address);
 248 }
 249
 250 /*
 251  * Change "struct page" to physical address.
 252  */
 253 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
 254
 255 /* We do NOT want virtual merging, it would put too much pressure on
 256  * our iommu allocator. Instead, we want drivers to be smart enough
 257  * to coalesce sglists that happen to have been mapped in a contiguous
 258  * way by the iommu
 259  */
 260 #define BIO_VMERGE_BOUNDARY     0
 261
 262 static inline void iosync(void)
 263 {
 264         __asm__ __volatile__ ("sync" : : : "memory");
 265 }
 266
 267 /* Enforce in-order execution of data I/O.
 268  * No distinction between read/write on PPC; use eieio for all three.
 269  */
 270 #define iobarrier_rw() eieio()
 271 #define iobarrier_r()  eieio()
 272 #define iobarrier_w()  eieio()
 273
 274 /*
 275  * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 276  * These routines do not perform EEH-related I/O address translation,
 277  * and should not be used directly by device drivers.  Use inb/readb
 278  * instead.
 279  */
 280 static inline int in_8(const volatile unsigned char __iomem *addr)
 281 {
 282         int ret;
 283
 284         __asm__ __volatile__("lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
 285                              : "=r" (ret) : "m" (*addr));
 286         return ret;
 287 }
 288
 289 static inline void out_8(volatile unsigned char __iomem *addr, int val)
 290 {
 291         __asm__ __volatile__("stb%U0%X0 %1,%0; sync"
 292                              : "=m" (*addr) : "r" (val));
 293 }
 294
 295 static inline int in_le16(const volatile unsigned short __iomem *addr)
 296 {
 297         int ret;
 298
 299         __asm__ __volatile__("lhbrx %0,0,%1; twi 0,%0,0; isync"
 300                              : "=r" (ret) : "r" (addr), "m" (*addr));
 301         return ret;
 302 }
 303
 304 static inline int in_be16(const volatile unsigned short __iomem *addr)
 305 {
 306         int ret;
 307
 308         __asm__ __volatile__("lhz%U1%X1 %0,%1; twi 0,%0,0; isync"
 309                              : "=r" (ret) : "m" (*addr));
 310         return ret;
 311 }
 312
 313 static inline void out_le16(volatile unsigned short __iomem *addr, int val)
 314 {
 315         __asm__ __volatile__("sthbrx %1,0,%2; sync"
 316                              : "=m" (*addr) : "r" (val), "r" (addr));
 317 }
 318
 319 static inline void out_be16(volatile unsigned short __iomem *addr, int val)
 320 {
 321         __asm__ __volatile__("sth%U0%X0 %1,%0; sync"
 322                              : "=m" (*addr) : "r" (val));
 323 }
 324
 325 static inline unsigned in_le32(const volatile unsigned __iomem *addr)
 326 {
 327         unsigned ret;
 328
 329         __asm__ __volatile__("lwbrx %0,0,%1; twi 0,%0,0; isync"
 330                              : "=r" (ret) : "r" (addr), "m" (*addr));
 331         return ret;
 332 }
 333
 334 static inline unsigned in_be32(const volatile unsigned __iomem *addr)
 335 {
 336         unsigned ret;
 337
 338         __asm__ __volatile__("lwz%U1%X1 %0,%1; twi 0,%0,0; isync"
 339                              : "=r" (ret) : "m" (*addr));
 340         return ret;
 341 }
 342
 343 static inline void out_le32(volatile unsigned __iomem *addr, int val)
 344 {
 345         __asm__ __volatile__("stwbrx %1,0,%2; sync" : "=m" (*addr)
 346                              : "r" (val), "r" (addr));
 347 }
 348
 349 static inline void out_be32(volatile unsigned __iomem *addr, int val)
 350 {
 351         __asm__ __volatile__("stw%U0%X0 %1,%0; sync"
 352                              : "=m" (*addr) : "r" (val));
 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                              "ld %1,0(%2)\n"
 361                              "twi 0,%1,0\n"
 362                              "isync\n"
 363                              "rldimi %0,%1,5*8,1*8\n"
 364                              "rldimi %0,%1,3*8,2*8\n"
 365                              "rldimi %0,%1,1*8,3*8\n"
 366                              "rldimi %0,%1,7*8,4*8\n"
 367                              "rldicl %1,%1,32,0\n"
 368                              "rlwimi %0,%1,8,8,31\n"
 369                              "rlwimi %0,%1,24,16,23\n"
 370                              : "=r" (ret) , "=r" (tmp) : "b" (addr) , "m" (*addr));
 371         return ret;
 372 }
 373
 374 static inline unsigned long in_be64(const volatile unsigned long __iomem *addr)
 375 {
 376         unsigned long ret;
 377
 378         __asm__ __volatile__("ld%U1%X1 %0,%1; twi 0,%0,0; isync"
 379                              : "=r" (ret) : "m" (*addr));
 380         return ret;
 381 }
 382
 383 static inline void out_le64(volatile unsigned long __iomem *addr, unsigned long val)
 384 {
 385         unsigned long tmp;
 386
 387         __asm__ __volatile__(
 388                              "rldimi %0,%1,5*8,1*8\n"
 389                              "rldimi %0,%1,3*8,2*8\n"
 390                              "rldimi %0,%1,1*8,3*8\n"
 391                              "rldimi %0,%1,7*8,4*8\n"
 392                              "rldicl %1,%1,32,0\n"
 393                              "rlwimi %0,%1,8,8,31\n"
 394                              "rlwimi %0,%1,24,16,23\n"
 395                              "std %0,0(%3)\n"
 396                              "sync"
 397                              : "=&r" (tmp) , "=&r" (val) : "1" (val) , "b" (addr) , "m" (*addr));
 398 }
 399
 400 static inline void out_be64(volatile unsigned long __iomem *addr, unsigned long val)
 401 {
 402         __asm__ __volatile__("std%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val));
 403 }
 404
 405 #ifndef CONFIG_PPC_ISERIES
 406 #include <asm/eeh.h>
 407 #endif
 408
 409 /**
 410  *      check_signature         -       find BIOS signatures
 411  *      @io_addr: mmio address to check
 412  *      @signature:  signature block
 413  *      @length: length of signature
 414  *
 415  *      Perform a signature comparison with the mmio address io_addr. This
 416  *      address should have been obtained by ioremap.
 417  *      Returns 1 on a match.
 418  */
 419 static inline int check_signature(const volatile void __iomem * io_addr,
 420         const unsigned char *signature, int length)
 421 {
 422         int retval = 0;
 423 #ifndef CONFIG_PPC_ISERIES
 424         do {
 425                 if (readb(io_addr) != *signature)
 426                         goto out;
 427                 io_addr++;
 428                 signature++;
 429                 length--;
 430         } while (length);
 431         retval = 1;
 432 out:
 433 #endif
 434         return retval;
 435 }
 436
 437 /* Nothing to do */
 438
 439 #define dma_cache_inv(_start,_size)             do { } while (0)
 440 #define dma_cache_wback(_start,_size)           do { } while (0)
 441 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 442
 443
 444 /*
 445  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 446  * access
 447  */
 448 #define xlate_dev_mem_ptr(p)    __va(p)
 449
 450 /*
 451  * Convert a virtual cached pointer to an uncached pointer
 452  */
 453 #define xlate_dev_kmem_ptr(p)   p
 454
 455 #endif /* __KERNEL__ */
 456
 457 #endif /* CONFIG_PPC64 */
 458 #endif /* _ASM_POWERPC_IO_H */