usr/src/uts/sun4u/sys/isadma.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2000 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #ifndef _SYS_ISADMA_H
  28 #define _SYS_ISADMA_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * definition of ebus reg spec entry:
  38  */
  39 typedef struct {
  40         uint32_t ebus_addr_hi;
  41         uint32_t ebus_addr_low;
  42         uint32_t ebus_size;
  43 } ebus_regspec_t;
  44
  45 /*
  46  * driver soft state structure:
  47  */
  48 typedef struct {
  49         dev_info_t *isadma_dip;                 /* Our dip */
  50         ebus_regspec_t *isadma_regp;            /* Our cached registers */
  51         int32_t isadma_reglen;                  /* reg len */
  52         kmutex_t isadma_access_lock;            /* PIO/DMA lock */
  53         kcondvar_t isadma_access_cv;            /* cv to prevent PIO's */
  54         dev_info_t *isadma_ldip;                /* DMA lock dip */
  55         int isadma_want;                        /* Want state flag */
  56 } isadma_devstate_t;
  57
  58 /*
  59  * Lower bound and upper bound of DMA address space hole. Registers
  60  * in this hole belong to our childs  devices.
  61  */
  62 #define LO_BOUND        DMAC2_ALLMASK
  63 #define HI_BOUND        DMA_0XCNT
  64 #define IN_CHILD_SPACE(o)       ((o) > LO_BOUND && (o) < HI_BOUND)
  65 #define IN_16BIT_SPACE(o)       ((((o) >= DMA_0ADR) && (o) <= DMA_3WCNT) || \
  66         (((o) >= DMA_4ADR) && ((o) <= DMA_7WCNT)))
  67 #define IS_SEQREG(o)            (((o) == DMAC1_CLFF) || ((o) == DMAC2_CLFF))
  68 #define HDL_TO_SEQREG_ADDR(h, o) \
  69         ((((o) >= DMA_0ADR) && ((o) <= DMA_3WCNT)) ? \
  70         (h)->ahi_common.ah_addr + DMAC1_CLFF : \
  71         (h)->ahi_common.ah_addr + DMAC2_CLFF)
  72
  73 #define BEGIN_ISADMA(o, v)      ((o) == DMAC1_ALLMASK && (v))
  74 #define END_ISADMA(o, v)        ((o) == DMAC1_ALLMASK && (v) == 0)
  75
  76 #ifdef  __cplusplus
  77 }
  78 #endif
  79
  80 #endif  /* _SYS_ISADMA_H */