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/* $Id: vaddrs.h,v 1.21 1996/10/07 03:03:02 davem Exp $ */
#ifndef _SPARC_VADDRS_H
#define _SPARC_VADDRS_H
#include <asm/head.h>
/* asm-sparc/vaddrs.h: Here will be define the virtual addresses at
* which important I/O addresses will be mapped.
* For instance the timer register virtual address
* is defined here.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
/* I can see only one reason why we should have statically defined
* mappings for devices and is the speedup improvements of not loading
* a pointer and then the value in the assembly code
*/
#define IOBASE_VADDR 0xfe000000 /* Base for mapping pages */
#define IOBASE_LEN 0x00300000 /* Length of the IO area */
#define IOBASE_END 0xfe300000
#define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */
#define DVMA_LEN 0x00040000 /* Size of the DVMA address space */
#define DVMA_END 0xfff40000
/* IOMMU Mapping area, must be on a 16MB boundary! 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 0xffc00000 /* Base for per-cpu virtual mappings */
#define PERCPU_ENTSIZE 0x00100000
#define PERCPU_LEN ((PERCPU_ENTSIZE*NCPUS))
/* per-cpu offsets */
#define PERCPU_TBR_OFFSET 0x00000 /* %tbr, mainly used for identification. */
#define PERCPU_KSTACK_OFFSET 0x01000 /* Beginning of kernel stack for this cpu */
#define PERCPU_MBOX_OFFSET 0x03000 /* Prom SMP Mailbox */
#define PERCPU_CPUID_OFFSET 0x04000 /* Per-cpu ID number. */
#define PERCPU_ISALIVE_OFFSET 0x04004 /* Has CPU been initted yet? */
#define PERCPU_ISIDLING_OFFSET 0x04008 /* Is CPU in idle loop spinning? */
#endif /* !(_SPARC_VADDRS_H) */
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