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/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(unsigned long port,
  32                                   void *dst,
  33                                   unsigned long count)
  34 {
  35         volatile unsigned short *data_port;
  36         /* unsigned long end = (unsigned long)dst + (count << 1); */ /* P3 */
  37         u16 *ps = dst;
  38         u32 *pi;
  39
  40         data_port = (volatile unsigned short *)port;
  41
  42         if(((unsigned long)ps) & 0x2) {
  43                 *ps++ = *data_port;
  44                 count--;
  45         }
  46         pi = (u32 *)ps;
  47         while(count >= 2) {
  48                 u32 w;
  49
  50                 w  = (*data_port) << 16;
  51                 w |= (*data_port);
  52                 *pi++ = w;
  53                 count -= 2;
  54         }
  55         ps = (u16 *)pi;
  56         if(count)
  57                 *ps++ = *data_port;
  58
  59         /* __flush_dcache_range((unsigned long)dst, end); */ /* P3 see hme */
  60 }
  61
  62 static inline void __ide_outsw(unsigned long port,
  63                                    const void *src,
  64                                    unsigned long count)
  65 {
  66         volatile unsigned short *data_port;
  67         /* unsigned long end = (unsigned long)src + (count << 1); */
  68         const u16 *ps = src;
  69         const u32 *pi;
  70
  71         data_port = (volatile unsigned short *)port;
  72
  73         if(((unsigned long)src) & 0x2) {
  74                 *data_port = *ps++;
  75                 count--;
  76         }
  77         pi = (const u32 *)ps;
  78         while(count >= 2) {
  79                 u32 w;
  80
  81                 w = *pi++;
  82                 *data_port = (w >> 16);
  83                 *data_port = w;
  84                 count -= 2;
  85         }
  86         ps = (const u16 *)pi;
  87         if(count)
  88                 *data_port = *ps;
  89
  90         /* __flush_dcache_range((unsigned long)src, end); */ /* P3 see hme */
  91 }
  92
  93 #endif /* __KERNEL__ */
  94
  95 #endif /* _SPARC_IDE_H */