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- /* 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 ([email protected])
- * Copyright (C) 2000 Anton Blanchard ([email protected])
- */
- #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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