mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-02-07 08:45:14 +07:00
c279443709
This adds a fixed virtual mapping for PCI i/o addresses. The mapping is located at the last 2MB of vmalloc region (0xfee00000-0xff000000). 2MB is used to align with PMD size, but IO_SPACE_LIMIT is 1MB. The space is reserved after .map_io and can be mapped at any time later with pci_ioremap_io. Platforms which need early i/o mapping (e.g. for vga console) can call pci_map_io_early in their .map_io function. This has changed completely from the 1st implementation which only supported creating the static mapping at .map_io. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Nicolas Pitre <nico@linaro.org>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
|
|
* arch/arm/include/asm/map.h
|
|
*
|
|
* Copyright (C) 1999-2000 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Page table mapping constructs and function prototypes
|
|
*/
|
|
#ifndef __ASM_MACH_MAP_H
|
|
#define __ASM_MACH_MAP_H
|
|
|
|
#include <asm/io.h>
|
|
|
|
struct map_desc {
|
|
unsigned long virtual;
|
|
unsigned long pfn;
|
|
unsigned long length;
|
|
unsigned int type;
|
|
};
|
|
|
|
/* types 0-3 are defined in asm/io.h */
|
|
#define MT_UNCACHED 4
|
|
#define MT_CACHECLEAN 5
|
|
#define MT_MINICLEAN 6
|
|
#define MT_LOW_VECTORS 7
|
|
#define MT_HIGH_VECTORS 8
|
|
#define MT_MEMORY 9
|
|
#define MT_ROM 10
|
|
#define MT_MEMORY_NONCACHED 11
|
|
#define MT_MEMORY_DTCM 12
|
|
#define MT_MEMORY_ITCM 13
|
|
#define MT_MEMORY_SO 14
|
|
#define MT_MEMORY_DMA_READY 15
|
|
|
|
#ifdef CONFIG_MMU
|
|
extern void iotable_init(struct map_desc *, int);
|
|
extern void vm_reserve_area_early(unsigned long addr, unsigned long size,
|
|
void *caller);
|
|
|
|
struct mem_type;
|
|
extern const struct mem_type *get_mem_type(unsigned int type);
|
|
/*
|
|
* external interface to remap single page with appropriate type
|
|
*/
|
|
extern int ioremap_page(unsigned long virt, unsigned long phys,
|
|
const struct mem_type *mtype);
|
|
#else
|
|
#define iotable_init(map,num) do { } while (0)
|
|
#define vm_reserve_area_early(a,s,c) do { } while (0)
|
|
#endif
|
|
|
|
#endif
|