162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef _SPARC_VADDRS_H 362306a36Sopenharmony_ci#define _SPARC_VADDRS_H 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#include <asm/head.h> 662306a36Sopenharmony_ci 762306a36Sopenharmony_ci/* 862306a36Sopenharmony_ci * asm/vaddrs.h: Here we define the virtual addresses at 962306a36Sopenharmony_ci * which important things will be mapped. 1062306a36Sopenharmony_ci * 1162306a36Sopenharmony_ci * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 1262306a36Sopenharmony_ci * Copyright (C) 2000 Anton Blanchard (anton@samba.org) 1362306a36Sopenharmony_ci */ 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci#define SRMMU_MAXMEM 0x0c000000 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci#define SRMMU_NOCACHE_VADDR (KERNBASE + SRMMU_MAXMEM) 1862306a36Sopenharmony_ci /* = 0x0fc000000 */ 1962306a36Sopenharmony_ci/* XXX Empiricals - this needs to go away - KMW */ 2062306a36Sopenharmony_ci#define SRMMU_MIN_NOCACHE_PAGES (550) 2162306a36Sopenharmony_ci#define SRMMU_MAX_NOCACHE_PAGES (1280) 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci/* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize() 2462306a36Sopenharmony_ci * to determine the amount of memory that will be reserved as nocache: 2562306a36Sopenharmony_ci * 2662306a36Sopenharmony_ci * 256 pages will be taken as nocache per each 2762306a36Sopenharmony_ci * SRMMU_NOCACHE_ALCRATIO MB of system memory. 2862306a36Sopenharmony_ci * 2962306a36Sopenharmony_ci * limits enforced: nocache minimum = 256 pages 3062306a36Sopenharmony_ci * nocache maximum = 1280 pages 3162306a36Sopenharmony_ci */ 3262306a36Sopenharmony_ci#define SRMMU_NOCACHE_ALCRATIO 64 /* 256 pages per 64MB of system RAM */ 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci#ifndef __ASSEMBLY__ 3562306a36Sopenharmony_ci#include <asm/kmap_size.h> 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_cienum fixed_addresses { 3862306a36Sopenharmony_ci FIX_HOLE, 3962306a36Sopenharmony_ci#ifdef CONFIG_HIGHMEM 4062306a36Sopenharmony_ci FIX_KMAP_BEGIN, 4162306a36Sopenharmony_ci FIX_KMAP_END = (KM_MAX_IDX * NR_CPUS), 4262306a36Sopenharmony_ci#endif 4362306a36Sopenharmony_ci __end_of_fixed_addresses 4462306a36Sopenharmony_ci}; 4562306a36Sopenharmony_ci#endif 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ci/* Leave one empty page between IO pages at 0xfd000000 and 4862306a36Sopenharmony_ci * the top of the fixmap. 4962306a36Sopenharmony_ci */ 5062306a36Sopenharmony_ci#define FIXADDR_TOP (0xfcfff000UL) 5162306a36Sopenharmony_ci#define FIXADDR_SIZE ((FIX_KMAP_END + 1) << PAGE_SHIFT) 5262306a36Sopenharmony_ci#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) 5362306a36Sopenharmony_ci 5462306a36Sopenharmony_ci#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) 5562306a36Sopenharmony_ci 5662306a36Sopenharmony_ci#define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */ 5762306a36Sopenharmony_ci#define IOBASE_VADDR 0xfe000000 5862306a36Sopenharmony_ci#define IOBASE_END 0xfe600000 5962306a36Sopenharmony_ci 6062306a36Sopenharmony_ci#define KADB_DEBUGGER_BEGVM 0xffc00000 /* Where kern debugger is in virt-mem */ 6162306a36Sopenharmony_ci#define KADB_DEBUGGER_ENDVM 0xffd00000 6262306a36Sopenharmony_ci#define DEBUG_FIRSTVADDR KADB_DEBUGGER_BEGVM 6362306a36Sopenharmony_ci#define DEBUG_LASTVADDR KADB_DEBUGGER_ENDVM 6462306a36Sopenharmony_ci 6562306a36Sopenharmony_ci#define LINUX_OPPROM_BEGVM 0xffd00000 6662306a36Sopenharmony_ci#define LINUX_OPPROM_ENDVM 0xfff00000 6762306a36Sopenharmony_ci 6862306a36Sopenharmony_ci#define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */ 6962306a36Sopenharmony_ci#define DVMA_END 0xfffc0000 7062306a36Sopenharmony_ci 7162306a36Sopenharmony_ci#endif /* !(_SPARC_VADDRS_H) */ 72