1 files changed, 64 insertions, 0 deletions

diff --git a/arch/sparc/include/asm/vaddrs.h b/arch/sparc/include/asm/vaddrs.h
new file mode 100644
index 000000000000..541e13755cec
--- /dev/null
+++ b/arch/sparc/include/asm/vaddrs.h
@@ -0,0 +1,64 @@
+#ifndef _SPARC_VADDRS_H
+#define _SPARC_VADDRS_H
+
+#include <asm/head.h>
+
+/*
+ * asm/vaddrs.h:  Here we define the virtual addresses at
+ *                      which important things will be mapped.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
+ */
+
+#define SRMMU_MAXMEM            0x0c000000
+
+#define SRMMU_NOCACHE_VADDR     (KERNBASE + SRMMU_MAXMEM)
+                                /* = 0x0fc000000 */
+/* XXX Empiricals - this needs to go away - KMW */
+#define SRMMU_MIN_NOCACHE_PAGES (550)
+#define SRMMU_MAX_NOCACHE_PAGES (1280)
+
+/* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize()
+ * to determine the amount of memory that will be reserved as nocache:
+ *
+ * 256 pages will be taken as nocache per each
+ * SRMMU_NOCACHE_ALCRATIO MB of system memory.
+ *
+ * limits enforced:     nocache minimum = 256 pages
+ *                      nocache maximum = 1280 pages
+ */
+#define SRMMU_NOCACHE_ALCRATIO  64      /* 256 pages per 64MB of system RAM */
+
+#define SUN4M_IOBASE_VADDR      0xfd000000 /* Base for mapping pages */
+#define IOBASE_VADDR            0xfe000000
+#define IOBASE_END              0xfe600000
+
+/*
+ * On the sun4/4c 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_END          0xffc00000
+
+#define KADB_DEBUGGER_BEGVM     0xffc00000 /* Where kern debugger is in virt-mem */
+#define KADB_DEBUGGER_ENDVM     0xffd00000
+#define DEBUG_FIRSTVADDR        KADB_DEBUGGER_BEGVM
+#define DEBUG_LASTVADDR         KADB_DEBUGGER_ENDVM
+
+#define LINUX_OPPROM_BEGVM      0xffd00000
+#define LINUX_OPPROM_ENDVM      0xfff00000
+
+#define DVMA_VADDR              0xfff00000 /* Base area of the DVMA on suns */
+#define DVMA_END                0xfffc0000
+
+#endif /* !(_SPARC_VADDRS_H) */