cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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spaces.h (2281B)

      1/*
      2 * This file is subject to the terms and conditions of the GNU General Public
      3 * License.  See the file "COPYING" in the main directory of this archive
      4 * for more details.
      5 *
      6 * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
      7 * Copyright (C) 2000, 2002  Maciej W. Rozycki
      8 * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
      9 */
     10#ifndef _ASM_MACH_GENERIC_SPACES_H
     11#define _ASM_MACH_GENERIC_SPACES_H
     12
     13#include <linux/const.h>
     14
     15#include <asm/mipsregs.h>
     16
     17#ifndef IO_SPACE_LIMIT
     18#define IO_SPACE_LIMIT 0xffff
     19#endif
     20
     21/*
     22 * This gives the physical RAM offset.
     23 */
     24#ifndef __ASSEMBLY__
     25# if defined(CONFIG_MIPS_AUTO_PFN_OFFSET)
     26#  define PHYS_OFFSET		((unsigned long)PFN_PHYS(ARCH_PFN_OFFSET))
     27# elif !defined(PHYS_OFFSET)
     28#  define PHYS_OFFSET		_AC(0, UL)
     29# endif
     30#endif /* __ASSEMBLY__ */
     31
     32#ifdef CONFIG_32BIT
     33#define CAC_BASE		_AC(0x80000000, UL)
     34#ifndef IO_BASE
     35#define IO_BASE			_AC(0xa0000000, UL)
     36#endif
     37#ifndef UNCAC_BASE
     38#define UNCAC_BASE		_AC(0xa0000000, UL)
     39#endif
     40
     41#ifndef MAP_BASE
     42#define MAP_BASE		_AC(0xc0000000, UL)
     43#endif
     44
     45/*
     46 * Memory above this physical address will be considered highmem.
     47 */
     48#ifndef HIGHMEM_START
     49#define HIGHMEM_START		_AC(0x20000000, UL)
     50#endif
     51
     52#endif /* CONFIG_32BIT */
     53
     54#ifdef CONFIG_64BIT
     55
     56#ifndef CAC_BASE
     57#define CAC_BASE	PHYS_TO_XKPHYS(read_c0_config() & CONF_CM_CMASK, 0)
     58#endif
     59
     60#ifndef IO_BASE
     61#define IO_BASE			_AC(0x9000000000000000, UL)
     62#endif
     63
     64#ifndef UNCAC_BASE
     65#define UNCAC_BASE		_AC(0x9000000000000000, UL)
     66#endif
     67
     68#ifndef MAP_BASE
     69#define MAP_BASE		_AC(0xc000000000000000, UL)
     70#endif
     71
     72/*
     73 * Memory above this physical address will be considered highmem.
     74 * Fixme: 59 bits is a fictive number and makes assumptions about processors
     75 * in the distant future.  Nobody will care for a few years :-)
     76 */
     77#ifndef HIGHMEM_START
     78#define HIGHMEM_START		(_AC(1, UL) << _AC(59, UL))
     79#endif
     80
     81#define TO_PHYS(x)		(	      ((x) & TO_PHYS_MASK))
     82#define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
     83#define TO_UNCAC(x)		(UNCAC_BASE | ((x) & TO_PHYS_MASK))
     84
     85#endif /* CONFIG_64BIT */
     86
     87/*
     88 * This handles the memory map.
     89 */
     90#ifndef PAGE_OFFSET
     91#define PAGE_OFFSET		(CAC_BASE + PHYS_OFFSET)
     92#endif
     93
     94#ifndef FIXADDR_TOP
     95#define FIXADDR_TOP		((unsigned long)(long)(int)0xfffe0000)
     96#endif
     97
     98#endif /* __ASM_MACH_GENERIC_SPACES_H */