include/asm-sparc/ide_32.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/pgtable.h>
  14 #include <asm/io.h>
  15 #include <asm/psr.h>
  16
  17 #undef  MAX_HWIFS
  18 #define MAX_HWIFS       2
  19
  20 #define __ide_insl(data_reg, buffer, wcount) \
  21         __ide_insw(data_reg, buffer, (wcount)<<1)
  22 #define __ide_outsl(data_reg, buffer, wcount) \
  23         __ide_outsw(data_reg, buffer, (wcount)<<1)
  24
  25 /* On sparc, I/O ports and MMIO registers are accessed identically.  */
  26 #define __ide_mm_insw   __ide_insw
  27 #define __ide_mm_insl   __ide_insl
  28 #define __ide_mm_outsw  __ide_outsw
  29 #define __ide_mm_outsl  __ide_outsl
  30
  31 static inline void __ide_insw(void __iomem *port, void *dst, u32 count)
  32 {
  33         /* unsigned long end = (unsigned long)dst + (count << 1); */ /* P3 */
  34         u16 *ps = dst;
  35         u32 *pi;
  36
  37         if(((unsigned long)ps) & 0x2) {
  38                 *ps++ = __raw_readw(port);
  39                 count--;
  40         }
  41         pi = (u32 *)ps;
  42         while(count >= 2) {
  43                 u32 w;
  44
  45                 w  = __raw_readw(port) << 16;
  46                 w |= __raw_readw(port);
  47                 *pi++ = w;
  48                 count -= 2;
  49         }
  50         ps = (u16 *)pi;
  51         if(count)
  52                 *ps++ = __raw_readw(port);
  53
  54         /* __flush_dcache_range((unsigned long)dst, end); */ /* P3 see hme */
  55 }
  56
  57 static inline void __ide_outsw(void __iomem *port, const void *src, u32 count)
  58 {
  59         /* unsigned long end = (unsigned long)src + (count << 1); */
  60         const u16 *ps = src;
  61         const u32 *pi;
  62
  63         if(((unsigned long)src) & 0x2) {
  64                 __raw_writew(*ps++, port);
  65                 count--;
  66         }
  67         pi = (const u32 *)ps;
  68         while(count >= 2) {
  69                 u32 w;
  70
  71                 w = *pi++;
  72                 __raw_writew((w >> 16), port);
  73                 __raw_writew(w, port);
  74                 count -= 2;
  75         }
  76         ps = (const u16 *)pi;
  77         if(count)
  78                 __raw_writew(*ps, port);
  79
  80         /* __flush_dcache_range((unsigned long)src, end); */ /* P3 see hme */
  81 }
  82
  83 #endif /* __KERNEL__ */
  84
  85 #endif /* _SPARC_IDE_H */