patch-2.1.19 linux/include/asm-sparc64/sbus.h

• Lines: 99
• Date: Mon Dec 30 12:00:03 1996
• Orig file: v2.1.18/linux/include/asm-sparc64/sbus.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.18/linux/include/asm-sparc64/sbus.h linux/include/asm-sparc64/sbus.h
@@ -0,0 +1,98 @@
+/* $Id: sbus.h,v 1.1 1996/12/26 14:22:36 davem Exp $
+ * sbus.h:  Defines for the Sun SBus.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+/* XXX This needs to be mostly redone for sun5 SYSIO. */
+
+#ifndef _SPARC64_SBUS_H
+#define _SPARC64_SBUS_H
+
+#include <asm/oplib.h>
+#include <asm/iommu.h>
+
+/* We scan which devices are on the SBus using the PROM node device
+ * tree.  SBus devices are described in two different ways.  You can
+ * either get an absolute address at which to access the device, or
+ * you can get a SBus 'slot' number and an offset within that slot.
+ */
+
+/* The base address at which to calculate device OBIO addresses. */
+#define SUN_SBUS_BVADDR        0xf8000000
+#define SBUS_OFF_MASK          0x01ffffff
+
+/* These routines are used to calculate device address from slot
+ * numbers + offsets, and vice versa.
+ */
+
+extern __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
+{
+  return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
+}
+
+extern __inline__ int sbus_dev_slot(unsigned long dev_addr)
+{
+  return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
+}
+
+extern __inline__ unsigned long sbus_dev_offset(unsigned long dev_addr)
+{
+  return (unsigned long) (((dev_addr)-SUN_SBUS_BVADDR)&SBUS_OFF_MASK);
+}
+
+struct linux_sbus;
+
+/* Linux SBUS device tables */
+struct linux_sbus_device {
+  struct linux_sbus_device *next;      /* next device on this SBus or null */
+  struct linux_sbus_device *child;     /* For ledma and espdma on sun4m */
+  struct linux_sbus *my_bus;           /* Back ptr to sbus */
+  int prom_node;                       /* PROM device tree node for this device */
+  char prom_name[64];                  /* PROM device name */
+  char linux_name[64];                 /* Name used internally by Linux */
+
+  struct linux_prom_registers reg_addrs[PROMREG_MAX];
+  int num_registers;
+
+  struct linux_prom_irqs irqs[PROMINTR_MAX];
+  int num_irqs;
+
+  unsigned long sbus_addr;             /* Absolute base address for device. */
+  unsigned long sbus_vaddrs[PROMVADDR_MAX];
+  unsigned long num_vaddrs;
+  unsigned long offset;                /* Offset given by PROM */
+  int slot;
+};
+
+/* This struct describes the SBus(s) found on this machine. */
+struct linux_sbus {
+	struct linux_sbus *next;             /* next SBus, if more than one SBus */
+	struct linux_sbus_device *devices;   /* Link to devices on this SBus */
+	struct iommu_struct *iommu;          /* IOMMU for this sbus if applicable */
+	int prom_node;                       /* PROM device tree node for this SBus */
+	char prom_name[64];                  /* Usually "sbus" or "sbi" */
+	int clock_freq;
+	struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
+	int num_sbus_ranges;
+};
+
+extern struct linux_sbus *SBus_chain;
+
+/* Device probing routines could find these handy */
+#define for_each_sbus(bus) \
+        for((bus) = SBus_chain; (bus); (bus)=(bus)->next)
+
+#define for_each_sbusdev(device, bus) \
+        for((device) = (bus)->devices; (device); (device)=(device)->next)
+        
+#define for_all_sbusdev(device, bus) \
+	for((bus) = SBus_chain, (device) = (bus)->devices; (bus); (device)=((device)->next ? (device)->next : ((bus) = (bus)->next, (bus) ? (bus)->devices : 0)))
+
+/* XXX This is promlib stuff, what is it doing here? XXX */
+
+/* Apply promlib probed SBUS ranges to registers. */
+extern void prom_apply_sbus_ranges(struct linux_sbus *sbus, 
+				   struct linux_prom_registers *sbusregs, int nregs);
+
+#endif /* !(_SPARC64_SBUS_H) */