Current File : //usr/src/linux-headers-5.15.0-43/arch/sparc/include/asm/vaddrs.h
/* SPDX-License-Identifier: GPL-2.0 */
#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 */
#ifndef __ASSEMBLY__
#include <asm/kmap_size.h>
enum fixed_addresses {
FIX_HOLE,
#ifdef CONFIG_HIGHMEM
FIX_KMAP_BEGIN,
FIX_KMAP_END = (KM_MAX_IDX * NR_CPUS),
#endif
__end_of_fixed_addresses
};
#endif
/* Leave one empty page between IO pages at 0xfd000000 and
* the top of the fixmap.
*/
#define FIXADDR_TOP (0xfcfff000UL)
#define FIXADDR_SIZE ((FIX_KMAP_END + 1) << PAGE_SHIFT)
#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
#define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */
#define IOBASE_VADDR 0xfe000000
#define IOBASE_END 0xfe600000
#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) */
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