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99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
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/*
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File: AMICPrivEqu.h
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Contains: HAL private equates for accessing the DMA Controler in PDM (AMIC)
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Written by: Rich Collyer
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Copyright: <EFBFBD> 1992-1993 by Apple Computer, Inc., all rights reserved.
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Change History (most recent first):
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<SM3> 11/10/93 fau Update from SuperMunggio <SMG2>.
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<SMG2> 9/29/93 chp Removed typedefs for unsigned types.
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<SM2> 4/30/93 RC Major changes due to changes in B4 version of high level driver
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and due to new hardware.
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<SM1> 3/4/93 RC first checked in - Duplicate PSC HAL and made changes to work on AMIC (PDM)
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*/
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#ifndef __AMICPRIVEQU__
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#define __AMICPRIVEQU__
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/* duplicate enough "UniversalEqu" data structures to find the AMIC base address */
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enum {
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UnivInfoPtr = 0x0DD8 // low-memory global: type is (ProductInfo **)
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};
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enum {
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PhysBase = 0x61000000
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};
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struct ProductInfo {
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long decoderInfoPtr; // offset to address decoder info
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// there are several more fields here that are not interesting in this context
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};
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typedef struct ProductInfo ProductInfo;
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struct DecoderInfo {
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void *reserved [2]; // 2 base addresses precede the VIA1 in DecoderInfo
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char *VIA1Addr;
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void *reserved1 [33]; // 32 base addresses precede the AMIC in DecoderInfo
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void *AMICAddr;
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};
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typedef struct DecoderInfo DecoderInfo;
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/* AMIC register offsets and structures */
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enum AMICChannel{
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AMIC_SCC = 0x1080, // offset to DMA SCC
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AMIC_SCCTxA = 0x00, // offset to DMA SCC port A Transmit Buffer Address Register
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AMIC_SCCRxA = 0x10, // offset to DMA SCC port A Transmit Buffer Address Register
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AMIC_SCCTxB = 0x20, // offset to DMA SCC port A Transmit Buffer Address Register
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AMIC_SCCRxB = 0x30, // offset to DMA SCC port A Transmit Buffer Address Register
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AMIC_Count = 0x04, // offset to Count register off of Addr Reg
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AMIC_Cmd = 0x08, // offset to Command register off of Addr Reg
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AMIC_TopOfBuf = 0x2000 // DMA buffers for Serial are 8K big
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};
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typedef enum AMICChannel AMICChannel;
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enum {
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// DMA channel SCC Control register bit offsets
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RST = 0,
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RUN = 1,
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CONT = 2,
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IE = 3,
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PAUSE = 4,
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FROZEN = 5,
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RELOAD = 6,
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IF = 7
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};
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struct AMICDMASet {
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void *addr;
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ushort *cnt;
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ushort reserved;
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char *cmdStat;
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};
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typedef struct AMICDMASet AMICDMASet;
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struct AMICTailSet {
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void *addrPhys;
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void *addrLog;
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};
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typedef struct AMICTailSet AMICTailSet;
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#endif __AMICPRIVEQU__
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