rom/hidds/ata_pci/interface_dma.h

   1 /*
   2     Copyright © 2004-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: PCI-DMA hardware definitions
   6     Lang: English
   7 */
   8
   9 #include <asm/io.h>
  10
  11 /*
  12  * this **might** cause problems with PPC64, which **might** expect both to be 64bit.
  13  */
  14 struct PRDEntry
  15 {
  16    ULONG   prde_Address;
  17    ULONG   prde_Length;
  18 };
  19
  20 #define PRDE_EOT    0x80000000
  21 #define PRD_MAX     256
  22
  23 /* The single IDE bus (channel) */
  24 struct dma_data
  25 {
  26    port_t           au_DMAPort;
  27    struct PRDEntry *ab_PRD;
  28 };
  29
  30 /* SFF-8038i DMA registers */
  31 #define dma_Command         0x00
  32 #define dma_Status          0x02
  33 #define dma_PRD             0x04
  34
  35 /* DMA command register */
  36 #define DMA_READ            0x00    /* PCI *READS* from memory to drive */
  37 #define DMA_WRITE           0x08    /* PCI *WRITES* to memory from drive */
  38 #define DMA_START           0x01    /* DMA Start/Stop */
  39
  40 #define DMAB_Active         0
  41 #define DMAB_Error          1
  42 #define DMAB_Interrupt      2
  43 #define DMAB_Simplex        7
  44
  45 #define DMAF_Active         (1 << DMAB_Active)
  46 #define DMAF_Error          (1 << DMAB_Error)
  47 #define DMAF_Interrupt      (1 << DMAB_Interrupt)
  48 #define DMAF_Simplex        (1 << DMAB_Simplex)
  49
  50 extern const APTR dma_FuncTable[];