| /* 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_types.h> |
| |
| enum fixed_addresses { |
| FIX_HOLE, |
| #ifdef CONFIG_HIGHMEM |
| FIX_KMAP_BEGIN, |
| FIX_KMAP_END = (KM_TYPE_NR * 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) */ |
