include/asm-ppc64/io.h

   1 #ifndef _PPC64_IO_H
   2 #define _PPC64_IO_H
   3
   4 /*
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version
   8  * 2 of the License, or (at your option) any later version.
   9  */
  10
  11 #include <linux/config.h>
  12 #include <linux/compiler.h>
  13 #include <asm/page.h>
  14 #include <asm/byteorder.h>
  15 #ifdef CONFIG_PPC_ISERIES
  16 #include <asm/iSeries/iSeries_io.h>
  17 #endif
  18 #include <asm/memory.h>
  19 #include <asm/delay.h>
  20
  21 #include <asm-generic/iomap.h>
  22
  23 #define __ide_mm_insw(p, a, c) _insw_ns((volatile u16 __iomem *)(p), (a), (c))
  24 #define __ide_mm_insl(p, a, c) _insl_ns((volatile u32 __iomem *)(p), (a), (c))
  25 #define __ide_mm_outsw(p, a, c) _outsw_ns((volatile u16 __iomem *)(p), (a), (c))
  26 #define __ide_mm_outsl(p, a, c) _outsl_ns((volatile u32 __iomem *)(p), (a), (c))
  27
  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 extern unsigned long io_page_mask;
  37
  38 #define MAX_ISA_PORT 0x10000
  39
  40 #define _IO_IS_VALID(port) ((port) >= MAX_ISA_PORT || (1 << (port>>PAGE_SHIFT)) \
  41                             & io_page_mask)
  42
  43 #ifdef CONFIG_PPC_ISERIES
  44 /* __raw_* accessors aren't supported on iSeries */
  45 #define __raw_readb(addr)       { BUG(); 0; }
  46 #define __raw_readw(addr)       { BUG(); 0; }
  47 #define __raw_readl(addr)       { BUG(); 0; }
  48 #define __raw_readq(addr)       { BUG(); 0; }
  49 #define __raw_writeb(v, addr)   { BUG(); 0; }
  50 #define __raw_writew(v, addr)   { BUG(); 0; }
  51 #define __raw_writel(v, addr)   { BUG(); 0; }
  52 #define __raw_writeq(v, addr)   { BUG(); 0; }
  53 #define readb(addr)             iSeries_Read_Byte(addr)
  54 #define readw(addr)             iSeries_Read_Word(addr)
  55 #define readl(addr)             iSeries_Read_Long(addr)
  56 #define writeb(data, addr)      iSeries_Write_Byte((data),(addr))
  57 #define writew(data, addr)      iSeries_Write_Word((data),(addr))
  58 #define writel(data, addr)      iSeries_Write_Long((data),(addr))
  59 #define memset_io(a,b,c)        iSeries_memset_io((a),(b),(c))
  60 #define memcpy_fromio(a,b,c)    iSeries_memcpy_fromio((a), (b), (c))
  61 #define memcpy_toio(a,b,c)      iSeries_memcpy_toio((a), (b), (c))
  62
  63 #define inb(addr)               readb(((void __iomem *)(long)(addr)))
  64 #define inw(addr)               readw(((void __iomem *)(long)(addr)))
  65 #define inl(addr)               readl(((void __iomem *)(long)(addr)))
  66 #define outb(data,addr)         writeb(data,((void __iomem *)(long)(addr)))
  67 #define outw(data,addr)         writew(data,((void __iomem *)(long)(addr)))
  68 #define outl(data,addr)         writel(data,((void __iomem *)(long)(addr)))
  69 /*
  70  * The *_ns versions below don't do byte-swapping.
  71  * Neither do the standard versions now, these are just here
  72  * for older code.
  73  */
  74 #define insw_ns(port, buf, ns)  _insw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
  75 #define insl_ns(port, buf, nl)  _insl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
  76 #else
  77
  78 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  79 {
  80         return *(volatile unsigned char __force *)addr;
  81 }
  82 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  83 {
  84         return *(volatile unsigned short __force *)addr;
  85 }
  86 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  87 {
  88         return *(volatile unsigned int __force *)addr;
  89 }
  90 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
  91 {
  92         return *(volatile unsigned long __force *)addr;
  93 }
  94 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
  95 {
  96         *(volatile unsigned char __force *)addr = v;
  97 }
  98 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
  99 {
 100         *(volatile unsigned short __force *)addr = v;
 101 }
 102 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
 103 {
 104         *(volatile unsigned int __force *)addr = v;
 105 }
 106 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
 107 {
 108         *(volatile unsigned long __force *)addr = v;
 109 }
 110 #define readb(addr)             eeh_readb(addr)
 111 #define readw(addr)             eeh_readw(addr)
 112 #define readl(addr)             eeh_readl(addr)
 113 #define readq(addr)             eeh_readq(addr)
 114 #define writeb(data, addr)      eeh_writeb((data), (addr))
 115 #define writew(data, addr)      eeh_writew((data), (addr))
 116 #define writel(data, addr)      eeh_writel((data), (addr))
 117 #define writeq(data, addr)      eeh_writeq((data), (addr))
 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 #define inb(port)               eeh_inb((unsigned long)port)
 122 #define outb(val, port)         eeh_outb(val, (unsigned long)port)
 123 #define inw(port)               eeh_inw((unsigned long)port)
 124 #define outw(val, port)         eeh_outw(val, (unsigned long)port)
 125 #define inl(port)               eeh_inl((unsigned long)port)
 126 #define outl(val, port)         eeh_outl(val, (unsigned long)port)
 127
 128 /*
 129  * The insw/outsw/insl/outsl macros don't do byte-swapping.
 130  * They are only used in practice for transferring buffers which
 131  * are arrays of bytes, and byte-swapping is not appropriate in
 132  * that case.  - paulus */
 133 #define insb(port, buf, ns)     eeh_insb((port), (buf), (ns))
 134 #define insw(port, buf, ns)     eeh_insw_ns((port), (buf), (ns))
 135 #define insl(port, buf, nl)     eeh_insl_ns((port), (buf), (nl))
 136 #define insw_ns(port, buf, ns)  eeh_insw_ns((port), (buf), (ns))
 137 #define insl_ns(port, buf, nl)  eeh_insl_ns((port), (buf), (nl))
 138
 139 #define outsb(port, buf, ns)  _outsb((u8 __iomem *)((port)+pci_io_base), (buf), (ns))
 140 #define outsw(port, buf, ns)  _outsw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
 141 #define outsl(port, buf, nl)  _outsl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
 142
 143 #endif
 144
 145 #define readb_relaxed(addr) readb(addr)
 146 #define readw_relaxed(addr) readw(addr)
 147 #define readl_relaxed(addr) readl(addr)
 148 #define readq_relaxed(addr) readq(addr)
 149
 150 extern void _insb(volatile u8 __iomem *port, void *buf, int ns);
 151 extern void _outsb(volatile u8 __iomem *port, const void *buf, int ns);
 152 extern void _insw(volatile u16 __iomem *port, void *buf, int ns);
 153 extern void _outsw(volatile u16 __iomem *port, const void *buf, int ns);
 154 extern void _insl(volatile u32 __iomem *port, void *buf, int nl);
 155 extern void _outsl(volatile u32 __iomem *port, const void *buf, int nl);
 156 extern void _insw_ns(volatile u16 __iomem *port, void *buf, int ns);
 157 extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, int ns);
 158 extern void _insl_ns(volatile u32 __iomem *port, void *buf, int nl);
 159 extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, int nl);
 160
 161 #define mmiowb()
 162
 163 /*
 164  * output pause versions need a delay at least for the
 165  * w83c105 ide controller in a p610.
 166  */
 167 #define inb_p(port)             inb(port)
 168 #define outb_p(val, port)       (udelay(1), outb((val), (port)))
 169 #define inw_p(port)             inw(port)
 170 #define outw_p(val, port)       (udelay(1), outw((val), (port)))
 171 #define inl_p(port)             inl(port)
 172 #define outl_p(val, port)       (udelay(1), outl((val), (port)))
 173
 174 /*
 175  * The *_ns versions below don't do byte-swapping.
 176  * Neither do the standard versions now, these are just here
 177  * for older code.
 178  */
 179 #define outsw_ns(port, buf, ns) _outsw_ns((u16 __iomem *)((port)+pci_io_base), (buf), (ns))
 180 #define outsl_ns(port, buf, nl) _outsl_ns((u32 __iomem *)((port)+pci_io_base), (buf), (nl))
 181
 182
 183 #define IO_SPACE_LIMIT ~(0UL)
 184
 185
 186 #ifdef __KERNEL__
 187 extern int __ioremap_explicit(unsigned long p_addr, unsigned long v_addr,
 188                               unsigned long size, unsigned long flags);
 189 extern void __iomem *__ioremap(unsigned long address, unsigned long size,
 190                        unsigned long flags);
 191
 192 /**
 193  * ioremap     -   map bus memory into CPU space
 194  * @address:   bus address of the memory
 195  * @size:      size of the resource to map
 196  *
 197  * ioremap performs a platform specific sequence of operations to
 198  * make bus memory CPU accessible via the readb/readw/readl/writeb/
 199  * writew/writel functions and the other mmio helpers. The returned
 200  * address is not guaranteed to be usable directly as a virtual
 201  * address.
 202  */
 203 extern void __iomem *ioremap(unsigned long address, unsigned long size);
 204
 205 #define ioremap_nocache(addr, size)     ioremap((addr), (size))
 206 extern int iounmap_explicit(volatile void __iomem *addr, unsigned long size);
 207 extern void iounmap(volatile void __iomem *addr);
 208 extern void __iomem * reserve_phb_iospace(unsigned long size);
 209
 210 /**
 211  *      virt_to_phys    -       map virtual addresses to physical
 212  *      @address: address to remap
 213  *
 214  *      The returned physical address is the physical (CPU) mapping for
 215  *      the memory address given. It is only valid to use this function on
 216  *      addresses directly mapped or allocated via kmalloc.
 217  *
 218  *      This function does not give bus mappings for DMA transfers. In
 219  *      almost all conceivable cases a device driver should not be using
 220  *      this function
 221  */
 222 static inline unsigned long virt_to_phys(volatile void * address)
 223 {
 224         return __pa((unsigned long)address);
 225 }
 226
 227 /**
 228  *      phys_to_virt    -       map physical address to virtual
 229  *      @address: address to remap
 230  *
 231  *      The returned virtual address is a current CPU mapping for
 232  *      the memory address given. It is only valid to use this function on
 233  *      addresses that have a kernel mapping
 234  *
 235  *      This function does not handle bus mappings for DMA transfers. In
 236  *      almost all conceivable cases a device driver should not be using
 237  *      this function
 238  */
 239 static inline void * phys_to_virt(unsigned long address)
 240 {
 241         return (void *)__va(address);
 242 }
 243
 244 /*
 245  * Change "struct page" to physical address.
 246  */
 247 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
 248
 249 /* We do NOT want virtual merging, it would put too much pressure on
 250  * our iommu allocator. Instead, we want drivers to be smart enough
 251  * to coalesce sglists that happen to have been mapped in a contiguous
 252  * way by the iommu
 253  */
 254 #define BIO_VMERGE_BOUNDARY     0
 255
 256 #endif /* __KERNEL__ */
 257
 258 static inline void iosync(void)
 259 {
 260         __asm__ __volatile__ ("sync" : : : "memory");
 261 }
 262
 263 /* Enforce in-order execution of data I/O.
 264  * No distinction between read/write on PPC; use eieio for all three.
 265  */
 266 #define iobarrier_rw() eieio()
 267 #define iobarrier_r()  eieio()
 268 #define iobarrier_w()  eieio()
 269
 270 /*
 271  * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 272  * These routines do not perform EEH-related I/O address translation,
 273  * and should not be used directly by device drivers.  Use inb/readb
 274  * instead.
 275  */
 276 static inline int in_8(const volatile unsigned char __iomem *addr)
 277 {
 278         int ret;
 279
 280         __asm__ __volatile__("lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
 281                              : "=r" (ret) : "m" (*addr));
 282         return ret;
 283 }
 284
 285 static inline void out_8(volatile unsigned char __iomem *addr, int val)
 286 {
 287         __asm__ __volatile__("stb%U0%X0 %1,%0; sync"
 288                              : "=m" (*addr) : "r" (val));
 289 }
 290
 291 static inline int in_le16(const volatile unsigned short __iomem *addr)
 292 {
 293         int ret;
 294
 295         __asm__ __volatile__("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__("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__("sthbrx %1,0,%2; sync"
 312                              : "=m" (*addr) : "r" (val), "r" (addr));
 313 }
 314
 315 static inline void out_be16(volatile unsigned short __iomem *addr, int val)
 316 {
 317         __asm__ __volatile__("sth%U0%X0 %1,%0; sync"
 318                              : "=m" (*addr) : "r" (val));
 319 }
 320
 321 static inline unsigned in_le32(const volatile unsigned __iomem *addr)
 322 {
 323         unsigned ret;
 324
 325         __asm__ __volatile__("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__("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__("stwbrx %1,0,%2; sync" : "=m" (*addr)
 342                              : "r" (val), "r" (addr));
 343 }
 344
 345 static inline void out_be32(volatile unsigned __iomem *addr, int val)
 346 {
 347         __asm__ __volatile__("stw%U0%X0 %1,%0; sync"
 348                              : "=m" (*addr) : "r" (val));
 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                              "ld %1,0(%2)\n"
 357                              "twi 0,%1,0\n"
 358                              "isync\n"
 359                              "rldimi %0,%1,5*8,1*8\n"
 360                              "rldimi %0,%1,3*8,2*8\n"
 361                              "rldimi %0,%1,1*8,3*8\n"
 362                              "rldimi %0,%1,7*8,4*8\n"
 363                              "rldicl %1,%1,32,0\n"
 364                              "rlwimi %0,%1,8,8,31\n"
 365                              "rlwimi %0,%1,24,16,23\n"
 366                              : "=r" (ret) , "=r" (tmp) : "b" (addr) , "m" (*addr));
 367         return ret;
 368 }
 369
 370 static inline unsigned long in_be64(const volatile unsigned long __iomem *addr)
 371 {
 372         unsigned long ret;
 373
 374         __asm__ __volatile__("ld%U1%X1 %0,%1; twi 0,%0,0; isync"
 375                              : "=r" (ret) : "m" (*addr));
 376         return ret;
 377 }
 378
 379 static inline void out_le64(volatile unsigned long __iomem *addr, unsigned long val)
 380 {
 381         unsigned long tmp;
 382
 383         __asm__ __volatile__(
 384                              "rldimi %0,%1,5*8,1*8\n"
 385                              "rldimi %0,%1,3*8,2*8\n"
 386                              "rldimi %0,%1,1*8,3*8\n"
 387                              "rldimi %0,%1,7*8,4*8\n"
 388                              "rldicl %1,%1,32,0\n"
 389                              "rlwimi %0,%1,8,8,31\n"
 390                              "rlwimi %0,%1,24,16,23\n"
 391                              "std %0,0(%3)\n"
 392                              "sync"
 393                              : "=&r" (tmp) , "=&r" (val) : "1" (val) , "b" (addr) , "m" (*addr));
 394 }
 395
 396 static inline void out_be64(volatile unsigned long __iomem *addr, unsigned long val)
 397 {
 398         __asm__ __volatile__("std%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val));
 399 }
 400
 401 #ifndef CONFIG_PPC_ISERIES
 402 #include <asm/eeh.h>
 403 #endif
 404
 405 #ifdef __KERNEL__
 406
 407 /**
 408  *      check_signature         -       find BIOS signatures
 409  *      @io_addr: mmio address to check
 410  *      @signature:  signature block
 411  *      @length: length of signature
 412  *
 413  *      Perform a signature comparison with the mmio address io_addr. This
 414  *      address should have been obtained by ioremap.
 415  *      Returns 1 on a match.
 416  */
 417 static inline int check_signature(const volatile void __iomem * io_addr,
 418         const unsigned char *signature, int length)
 419 {
 420         int retval = 0;
 421 #ifndef CONFIG_PPC_ISERIES
 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 #endif
 432         return retval;
 433 }
 434
 435 /* Nothing to do */
 436
 437 #define dma_cache_inv(_start,_size)             do { } while (0)
 438 #define dma_cache_wback(_start,_size)           do { } while (0)
 439 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 440
 441 /* Check of existence of legacy devices */
 442 extern int check_legacy_ioport(unsigned long base_port);
 443
 444
 445 /*
 446  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 447  * access
 448  */
 449 #define xlate_dev_mem_ptr(p)    __va(p)
 450
 451 /*
 452  * Convert a virtual cached pointer to an uncached pointer
 453  */
 454 #define xlate_dev_kmem_ptr(p)   p
 455
 456 #endif /* __KERNEL__ */
 457
 458 #endif /* _PPC64_IO_H */