patch-1.3.71 linux/include/asm-sparc/vaddrs.h

• Lines: 57
• Date: Mon Mar 4 08:50:04 1996
• Orig file: v1.3.70/linux/include/asm-sparc/vaddrs.h
• Orig date: Sat Nov 25 19:04:56 1995

diff -u --recursive --new-file v1.3.70/linux/include/asm-sparc/vaddrs.h linux/include/asm-sparc/vaddrs.h
@@ -1,4 +1,4 @@
-/* $Id: vaddrs.h,v 1.15 1995/11/25 02:33:20 davem Exp $ */
+/* $Id: vaddrs.h,v 1.17 1996/01/10 21:00:16 davem Exp $ */
 #ifndef _SPARC_VADDRS_H
 #define _SPARC_VADDRS_H
 
@@ -16,13 +16,6 @@
  * mappings for devices and is the speedup improvements of not loading
  * a pointer and then the value in the assembly code
  */
-
-#define  AUXIO_VADDR  (KERNBASE+0x6000)    /* Auxiliary IO register */
-#define  TIMER_VADDR  (AUXIO_VADDR+0x1000) /* One page after AUXIO, length is
-					    * 5 pages which is needed on sun4m.
-					    */
-#define  INTREG_VADDR (TIMER_VADDR+0x5000)
-
 #define  IOBASE_VADDR   0xfe000000  /* Base for mapping pages */
 #define  IOBASE_LEN     0x00100000  /* Length of the IO area */
 #define  IOBASE_END     0xfe100000
@@ -30,6 +23,31 @@
 #define  DVMA_LEN       0x00040000  /* Size of the DVMA address space */
 #define  DVMA_END       0xfff40000
 
+/* IOMMU Mapping area, must be on a 16MB boundry!  Note this
+ * doesn't count the DVMA areas, the prom lives between the
+ * iommu mapping area (for scsi transfer buffers) and the
+ * dvma upper range (for lance packet ring buffers).
+ */
+#define  IOMMU_VADDR    0xff000000
+#define  IOMMU_LEN      0x00c00000
+#define  IOMMU_END      0xffc00000 /* KADB debugger vm starts here */
+
+/* On the sun4/4c we don't need an IOMMU area, but we need a place
+ * to reliably map locked down kernel data.  This includes the
+ * task_struct and kernel stack pages of each process plus the
+ * scsi buffers during dvma IO transfers, also the floppy buffers
+ * during pseudo dma which runs with traps off (no faults allowed).
+ * Some quick calculations yield:
+ *       NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000
+ * Subtract this from 0xc00000 and you get 0x927C0 of vm left
+ * over to map SCSI dvma + floppy pseudo-dma buffers.  So be
+ * careful if you change NR_TASKS or else there won't be enough
+ * room for it all.
+ */
+#define  SUN4C_LOCK_VADDR  0xff000000
+#define  SUN4C_LOCK_LEN    0x00c00000
+#define  SUN4C_LOCK_END    0xffc00000
+
 /* On sun4m machines we need per-cpu virtual areas */
 #define  PERCPU_VADDR   0xff000000  /* Base for per-cpu virtual mappings */
 #define  PERCPU_ENTSIZE 0x00100000
@@ -44,3 +62,4 @@
 #define  PERCPU_ISIDLING_OFFSET 0x03008      /* Is CPU in idle loop spinning? */
 
 #endif /* !(_SPARC_VADDRS_H) */
+