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