1 /*
2 * asm-ppc/hydra.h -- Mac I/O `Hydra' definitions
3 *
4 * Copyright (C) 1997 Geert Uytterhoeven
5 *
6 * This file is based on the following documentation:
7 *
8 * Macintosh Technology in the Common Hardware Reference Platform
9 * Apple Computer, Inc.
10 *
11 * © Copyright 1995 Apple Computer, Inc. All rights reserved.
12 *
13 * It's available online from http://chrp.apple.com/MacTech.pdf.
14 * You can obtain paper copies of this book from computer bookstores or by
15 * writing Morgan Kaufmann Publishers, Inc., 340 Pine Street, Sixth Floor, San
16 * Francisco, CA 94104. Reference ISBN 1-55860-393-X.
17 *
18 * This file is subject to the terms and conditions of the GNU General Public
19 * License. See the file COPYING in the main directory of this archive
20 * for more details.
21 */
22
23 #ifndef _ASMPPC_HYDRA_H
24 #define _ASMPPC_HYDRA_H
25
26 #ifdef __KERNEL__
27
28 struct Hydra {
29 /* DBDMA Controller Register Space */
30 char Pad1[0x30];
31 u_int CachePD;
32 u_int IDs;
33 u_int Feature_Control;
34 char Pad2[0x7fc4];
35 /* DBDMA Channel Register Space */
36 char SCSI_DMA[0x100];
37 char Pad3[0x300];
38 char SCCA_Tx_DMA[0x100];
39 char SCCA_Rx_DMA[0x100];
40 char SCCB_Tx_DMA[0x100];
41 char SCCB_Rx_DMA[0x100];
42 char Pad4[0x7800];
43 /* Device Register Space */
44 char SCSI[0x1000];
45 char ADB[0x1000];
46 char SCC_Legacy[0x1000];
47 char SCC[0x1000];
48 char Pad9[0x2000];
49 char VIA[0x2000];
50 char Pad10[0x28000];
51 char OpenPIC[0x40000];
52 };
53
54 extern volatile struct Hydra *Hydra;
55
56
57 /*
58 * Feature Control Register
59 */
60
61 #define HYDRA_FC_SCC_CELL_EN 0x00000001 /* Enable SCC Clock */
62 #define HYDRA_FC_SCSI_CELL_EN 0x00000002 /* Enable SCSI Clock */
63 #define HYDRA_FC_SCCA_ENABLE 0x00000004 /* Enable SCC A Lines */
64 #define HYDRA_FC_SCCB_ENABLE 0x00000008 /* Enable SCC B Lines */
65 #define HYDRA_FC_ARB_BYPASS 0x00000010 /* Bypass Internal Arbiter */
66 #define HYDRA_FC_RESET_SCC 0x00000020 /* Reset SCC */
67 #define HYDRA_FC_MPIC_ENABLE 0x00000040 /* Enable OpenPIC */
68 #define HYDRA_FC_SLOW_SCC_PCLK 0x00000080 /* 1=15.6672, 0=25 MHz */
69 #define HYDRA_FC_MPIC_IS_MASTER 0x00000100 /* OpenPIC Master Mode */
70
71
72 /*
73 * OpenPIC Interrupt Sources
74 */
75
76 #define HYDRA_INT_SIO 0
77 #define HYDRA_INT_SCSI_DMA 1
78 #define HYDRA_INT_SCCA_TX_DMA 2
79 #define HYDRA_INT_SCCA_RX_DMA 3
80 #define HYDRA_INT_SCCB_TX_DMA 4
81 #define HYDRA_INT_SCCB_RX_DMA 5
82 #define HYDRA_INT_SCSI 6
83 #define HYDRA_INT_SCCA 7
84 #define HYDRA_INT_SCCB 8
85 #define HYDRA_INT_VIA 9
86 #define HYDRA_INT_ADB 10
87 #define HYDRA_INT_ADB_NMI 11
88 #define HYDRA_INT_EXT1 12 /* PCI IRQW */
89 #define HYDRA_INT_EXT2 13 /* PCI IRQX */
90 #define HYDRA_INT_EXT3 14 /* PCI IRQY */
91 #define HYDRA_INT_EXT4 15 /* PCI IRQZ */
92 #define HYDRA_INT_EXT5 16 /* IDE Primay/Secondary */
93 #define HYDRA_INT_EXT6 17 /* IDE Secondary */
94 #define HYDRA_INT_EXT7 18 /* Power Off Request */
95 #define HYDRA_INT_SPARE 19
96
97 extern int hydra_init(void);
98 extern void macio_adb_init(void);
99
100 #endif /* __KERNEL__ */
101
102 #endif /* _ASMPPC_HYDRA_H */
103
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