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MIPS: sync I/O related header files with linux-4.4

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Mainly sync asm/io.h to get a working ioremap() implementation
as well as the full set of I/O accessors. Pull in additional
header files to make this work.

Furthermore port over the directory 'arch/mips/include/asm/mach-generic/'
with contains default definitions for I/O and memory spaces and default
implementations for mapping those spaces. All files in that directory
can be overwritten by a SoC/machine.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
This commit is contained in:
Daniel Schwierzeck 2016-01-12 21:48:25 +01:00
parent df50b3b414
commit 23ff8633fd
10 changed files with 989 additions and 412 deletions
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102
arch/mips/include/asm/mach-generic/spaces.h Normal file
View file

@ -0,0 +1,102 @@
/*
* Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
* Copyright (C) 2000, 2002 Maciej W. Rozycki
* Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
*
* SPDX-License-Identifier: GPL-2.0
*/
#ifndef _ASM_MACH_GENERIC_SPACES_H
#define _ASM_MACH_GENERIC_SPACES_H
#include <asm/const.h>
/*
* This gives the physical RAM offset.
*/
#ifndef PHYS_OFFSET
#define PHYS_OFFSET _AC(0, UL)
#endif
#ifdef CONFIG_32BIT
#ifdef CONFIG_KVM_GUEST
#define CAC_BASE _AC(0x40000000, UL)
#else
#define CAC_BASE _AC(0x80000000, UL)
#endif
#ifndef IO_BASE
#define IO_BASE _AC(0xa0000000, UL)
#endif
#ifndef UNCAC_BASE
#define UNCAC_BASE _AC(0xa0000000, UL)
#endif
#ifndef MAP_BASE
#ifdef CONFIG_KVM_GUEST
#define MAP_BASE _AC(0x60000000, UL)
#else
#define MAP_BASE _AC(0xc0000000, UL)
#endif
#endif
/*
* Memory above this physical address will be considered highmem.
*/
#ifndef HIGHMEM_START
#define HIGHMEM_START _AC(0x20000000, UL)
#endif
#endif /* CONFIG_32BIT */
#ifdef CONFIG_64BIT
#ifndef CAC_BASE
#ifdef CONFIG_DMA_NONCOHERENT
#define CAC_BASE _AC(0x9800000000000000, UL)
#else
#define CAC_BASE _AC(0xa800000000000000, UL)
#endif
#endif
#ifndef IO_BASE
#define IO_BASE _AC(0x9000000000000000, UL)
#endif
#ifndef UNCAC_BASE
#define UNCAC_BASE _AC(0x9000000000000000, UL)
#endif
#ifndef MAP_BASE
#define MAP_BASE _AC(0xc000000000000000, UL)
#endif
/*
* Memory above this physical address will be considered highmem.
* Fixme: 59 bits is a fictive number and makes assumptions about processors
* in the distant future. Nobody will care for a few years :-)
*/
#ifndef HIGHMEM_START
#define HIGHMEM_START (_AC(1, UL) << _AC(59, UL))
#endif
#define TO_PHYS(x) ( ((x) & TO_PHYS_MASK))
#define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK))
#define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK))
#endif /* CONFIG_64BIT */
/*
* This handles the memory map.
*/
#ifndef PAGE_OFFSET
#define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET)
#endif
#ifndef FIXADDR_TOP
#ifdef CONFIG_KVM_GUEST
#define FIXADDR_TOP ((unsigned long)(long)(int)0x7ffe0000)
#else
#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000)
#endif
#endif
#endif /* __ASM_MACH_GENERIC_SPACES_H */