include/asm-sparc/ide.h

   1 /* ide.h: SPARC PCI specific IDE glue.
   2  *
   3  * Copyright (C) 1997  David S. Miller (davem@davemloft.net)
   4  * Copyright (C) 1998  Eddie C. Dost   (ecd@skynet.be)
   5  * Adaptation from sparc64 version to sparc by Pete Zaitcev.
   6  */
   7
   8 #ifndef _SPARC_IDE_H
   9 #define _SPARC_IDE_H
  10
  11 #ifdef __KERNEL__
  12
  13 #include <asm/io.h>
  14 #ifdef CONFIG_SPARC64
  15 #include <asm/pgalloc.h>
  16 #include <asm/spitfire.h>
  17 #include <asm/cacheflush.h>
  18 #include <asm/page.h>
  19 #else
  20 #include <asm/pgtable.h>
  21 #include <asm/psr.h>
  22 #endif
  23
  24 #undef  MAX_HWIFS
  25 #define MAX_HWIFS       2
  26
  27 #define __ide_insl(data_reg, buffer, wcount) \
  28         __ide_insw(data_reg, buffer, (wcount)<<1)
  29 #define __ide_outsl(data_reg, buffer, wcount) \
  30         __ide_outsw(data_reg, buffer, (wcount)<<1)
  31
  32 /* On sparc, I/O ports and MMIO registers are accessed identically.  */
  33 #define __ide_mm_insw   __ide_insw
  34 #define __ide_mm_insl   __ide_insl
  35 #define __ide_mm_outsw  __ide_outsw
  36 #define __ide_mm_outsl  __ide_outsl
  37
  38 static inline void __ide_insw(void __iomem *port, void *dst, u32 count)
  39 {
  40 #if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
  41         unsigned long end = (unsigned long)dst + (count << 1);
  42 #endif
  43         u16 *ps = dst;
  44         u32 *pi;
  45
  46         if(((unsigned long)ps) & 0x2) {
  47                 *ps++ = __raw_readw(port);
  48                 count--;
  49         }
  50         pi = (u32 *)ps;
  51         while(count >= 2) {
  52                 u32 w;
  53
  54                 w  = __raw_readw(port) << 16;
  55                 w |= __raw_readw(port);
  56                 *pi++ = w;
  57                 count -= 2;
  58         }
  59         ps = (u16 *)pi;
  60         if(count)
  61                 *ps++ = __raw_readw(port);
  62
  63 #if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
  64         __flush_dcache_range((unsigned long)dst, end);
  65 #endif
  66 }
  67
  68 static inline void __ide_outsw(void __iomem *port, const void *src, u32 count)
  69 {
  70 #if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
  71         unsigned long end = (unsigned long)src + (count << 1);
  72 #endif
  73         const u16 *ps = src;
  74         const u32 *pi;
  75
  76         if(((unsigned long)src) & 0x2) {
  77                 __raw_writew(*ps++, port);
  78                 count--;
  79         }
  80         pi = (const u32 *)ps;
  81         while(count >= 2) {
  82                 u32 w;
  83
  84                 w = *pi++;
  85                 __raw_writew((w >> 16), port);
  86                 __raw_writew(w, port);
  87                 count -= 2;
  88         }
  89         ps = (const u16 *)pi;
  90         if(count)
  91                 __raw_writew(*ps, port);
  92
  93 #if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
  94         __flush_dcache_range((unsigned long)src, end);
  95 #endif
  96 }
  97
  98 #endif /* __KERNEL__ */
  99
 100 #endif /* _SPARC_IDE_H */