include/asm-sparc64/ide.h

   1 /* $Id: ide.h,v 1.21 2001/09/25 20:21:48 kanoj Exp $
   2  * ide.h: Ultra/PCI specific IDE glue.
   3  *
   4  * Copyright (C) 1997  David S. Miller (davem@caip.rutgers.edu)
   5  * Copyright (C) 1998  Eddie C. Dost   (ecd@skynet.be)
   6  */
   7
   8 #ifndef _SPARC64_IDE_H
   9 #define _SPARC64_IDE_H
  10
  11 #ifdef __KERNEL__
  12
  13 #include <linux/config.h>
  14 #include <asm/pgalloc.h>
  15 #include <asm/io.h>
  16 #include <asm/spitfire.h>
  17 #include <asm/cacheflush.h>
  18
  19 #ifndef MAX_HWIFS
  20 # ifdef CONFIG_BLK_DEV_IDEPCI
  21 #define MAX_HWIFS       10
  22 # else
  23 #define MAX_HWIFS       2
  24 # endif
  25 #endif
  26
  27 #define IDE_ARCH_OBSOLETE_INIT
  28 #define ide_default_io_ctl(base)        ((base) + 0x206) /* obsolete */
  29
  30 #define __ide_insl(data_reg, buffer, wcount) \
  31         __ide_insw(data_reg, buffer, (wcount)<<1)
  32 #define __ide_outsl(data_reg, buffer, wcount) \
  33         __ide_outsw(data_reg, buffer, (wcount)<<1)
  34
  35 /* On sparc64, I/O ports and MMIO registers are accessed identically.  */
  36 #define __ide_mm_insw   __ide_insw
  37 #define __ide_mm_insl   __ide_insl
  38 #define __ide_mm_outsw  __ide_outsw
  39 #define __ide_mm_outsl  __ide_outsl
  40
  41 static inline unsigned int inw_be(void __iomem *addr)
  42 {
  43         unsigned int ret;
  44
  45         __asm__ __volatile__("lduha [%1] %2, %0"
  46                              : "=r" (ret)
  47                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
  48
  49         return ret;
  50 }
  51
  52 static inline void __ide_insw(void __iomem *port, void *dst, u32 count)
  53 {
  54 #ifdef DCACHE_ALIASING_POSSIBLE
  55         unsigned long end = (unsigned long)dst + (count << 1);
  56 #endif
  57         u16 *ps = dst;
  58         u32 *pi;
  59
  60         if(((u64)ps) & 0x2) {
  61                 *ps++ = inw_be(port);
  62                 count--;
  63         }
  64         pi = (u32 *)ps;
  65         while(count >= 2) {
  66                 u32 w;
  67
  68                 w  = inw_be(port) << 16;
  69                 w |= inw_be(port);
  70                 *pi++ = w;
  71                 count -= 2;
  72         }
  73         ps = (u16 *)pi;
  74         if(count)
  75                 *ps++ = inw_be(port);
  76
  77 #ifdef DCACHE_ALIASING_POSSIBLE
  78         __flush_dcache_range((unsigned long)dst, end);
  79 #endif
  80 }
  81
  82 static inline void outw_be(unsigned short w, void __iomem *addr)
  83 {
  84         __asm__ __volatile__("stha %0, [%1] %2"
  85                              : /* no outputs */
  86                              : "r" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
  87 }
  88
  89 static inline void __ide_outsw(void __iomem *port, void *src, u32 count)
  90 {
  91 #ifdef DCACHE_ALIASING_POSSIBLE
  92         unsigned long end = (unsigned long)src + (count << 1);
  93 #endif
  94         const u16 *ps = src;
  95         const u32 *pi;
  96
  97         if(((u64)src) & 0x2) {
  98                 outw_be(*ps++, port);
  99                 count--;
 100         }
 101         pi = (const u32 *)ps;
 102         while(count >= 2) {
 103                 u32 w;
 104
 105                 w = *pi++;
 106                 outw_be((w >> 16), port);
 107                 outw_be(w, port);
 108                 count -= 2;
 109         }
 110         ps = (const u16 *)pi;
 111         if(count)
 112                 outw_be(*ps, port);
 113
 114 #ifdef DCACHE_ALIASING_POSSIBLE
 115         __flush_dcache_range((unsigned long)src, end);
 116 #endif
 117 }
 118
 119 #endif /* __KERNEL__ */
 120
 121 #endif /* _SPARC64_IDE_H */