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+/*
+ * include/asm-ppc/hydra.h -- Mac I/O `Hydra' definitions
+ *
+ * Copyright (C) 1997 Geert Uytterhoeven
+ *
+ * This file is based on the following documentation:
+ *
+ * Macintosh Technology in the Common Hardware Reference Platform
+ * Apple Computer, Inc.
+ *
+ * © Copyright 1995 Apple Computer, Inc. All rights reserved.
+ *
+ * It's available online from http://chrp.apple.com/MacTech.pdf.
+ * You can obtain paper copies of this book from computer bookstores or by
+ * writing Morgan Kaufmann Publishers, Inc., 340 Pine Street, Sixth Floor, San
+ * Francisco, CA 94104. Reference ISBN 1-55860-393-X.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASMPPC_HYDRA_H
+#define _ASMPPC_HYDRA_H
+
+#ifdef __KERNEL__
+
+struct Hydra {
+ /* DBDMA Controller Register Space */
+ char Pad1[0x30];
+ u_int CachePD;
+ u_int IDs;
+ u_int Feature_Control;
+ char Pad2[0x7fc4];
+ /* DBDMA Channel Register Space */
+ char SCSI_DMA[0x100];
+ char Pad3[0x300];
+ char SCCA_Tx_DMA[0x100];
+ char SCCA_Rx_DMA[0x100];
+ char SCCB_Tx_DMA[0x100];
+ char SCCB_Rx_DMA[0x100];
+ char Pad4[0x7800];
+ /* Device Register Space */
+ char SCSI[0x1000];
+ char ADB[0x1000];
+ char SCC_Legacy[0x1000];
+ char SCC[0x1000];
+ char Pad9[0x2000];
+ char VIA[0x2000];
+ char Pad10[0x28000];
+ char OpenPIC[0x40000];
+};
+
+extern volatile struct Hydra *Hydra;
+
+
+ /*
+ * Feature Control Register
+ */
+
+#define HYDRA_FC_SCC_CELL_EN 0x00000001 /* Enable SCC Clock */
+#define HYDRA_FC_SCSI_CELL_EN 0x00000002 /* Enable SCSI Clock */
+#define HYDRA_FC_SCCA_ENABLE 0x00000004 /* Enable SCC A Lines */
+#define HYDRA_FC_SCCB_ENABLE 0x00000008 /* Enable SCC B Lines */
+#define HYDRA_FC_ARB_BYPASS 0x00000010 /* Bypass Internal Arbiter */
+#define HYDRA_FC_RESET_SCC 0x00000020 /* Reset SCC */
+#define HYDRA_FC_MPIC_ENABLE 0x00000040 /* Enable OpenPIC */
+#define HYDRA_FC_SLOW_SCC_PCLK 0x00000080 /* 1=15.6672, 0=25 MHz */
+#define HYDRA_FC_MPIC_IS_MASTER 0x00000100 /* OpenPIC Master Mode */
+
+
+ /*
+ * OpenPIC Interrupt Sources
+ */
+
+#define HYDRA_INT_SIO 0
+#define HYDRA_INT_SCSI_DMA 1
+#define HYDRA_INT_SCCA_TX_DMA 2
+#define HYDRA_INT_SCCA_RX_DMA 3
+#define HYDRA_INT_SCCB_TX_DMA 4
+#define HYDRA_INT_SCCB_RX_DMA 5
+#define HYDRA_INT_SCSI 6
+#define HYDRA_INT_SCCA 7
+#define HYDRA_INT_SCCB 8
+#define HYDRA_INT_VIA 9
+#define HYDRA_INT_ADB 10
+#define HYDRA_INT_ADB_NMI 11
+#define HYDRA_INT_EXT1 12 /* PCI IRQW */
+#define HYDRA_INT_EXT2 13 /* PCI IRQX */
+#define HYDRA_INT_EXT3 14 /* PCI IRQY */
+#define HYDRA_INT_EXT4 15 /* PCI IRQZ */
+#define HYDRA_INT_EXT5 16 /* IDE Primay/Secondary */
+#define HYDRA_INT_EXT6 17 /* IDE Secondary */
+#define HYDRA_INT_EXT7 18 /* Power Off Request */
+#define HYDRA_INT_SPARE 19
+
+extern int hydra_init(void);
+extern void macio_adb_init(void);
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASMPPC_HYDRA_H */