patch-1.3.4 linux/include/asm-sparc/sbus.h

• Lines: 77
• Date: Thu Jun 8 23:47:04 1995
• Orig file: v1.3.3/linux/include/asm-sparc/sbus.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.3/linux/include/asm-sparc/sbus.h linux/include/asm-sparc/sbus.h
@@ -0,0 +1,76 @@
+/* sbus.h:  Defines for the Sun SBus.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef _SPARC_SBUS_H
+#define _SPARC_SBUS_H
+
+#include <asm/openprom.h>  /* For linux_prom_registers and linux_prom_irqs */
+
+/* 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);
+}
+
+/* Handy macro */
+#define STRUCT_ALIGN(addr) ((addr+7)&(~7))
+
+/* Linus SBUS device tables */
+struct linux_sbus_device {
+  struct linux_sbus_device *next;      /* next device on this SBus or null */
+  int prom_node;                       /* PROM device tree node for this device */
+  char *prom_name;                     /* PROM device name */
+  char *linux_name;                    /* Name used internally by Linux */
+
+  /* device register addresses */
+  struct linux_prom_registers reg_addrs[PROMREG_MAX];
+  int num_registers;
+
+  /* List of IRQ's this device uses. */
+  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;                            /* Device slot number */
+};
+
+/* This struct describes the SBus-es 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 */
+  int prom_node;                       /* PROM device tree node for this SBus */
+  char *prom_name;                     /* Usually "sbus" */
+  int clock_freq;                 /* Speed of this SBus */
+};
+
+extern struct linux_sbus Linux_SBus;
+
+#endif /* !(_SPARC_SBUS_H) */