diff options
| author | Rob Herring <rob.herring@calxeda.com> | 2012-02-29 18:10:58 -0600 |
|---|---|---|
| committer | Rob Herring <rob.herring@calxeda.com> | 2012-07-25 09:26:42 -0500 |
| commit | c2794437091a4fda72c4a4f3567dd728dcc0c3c9 (patch) | |
| tree | 56e4d414f5b78bdf35822b38af5be021711a0970 /arch/arm/include/asm/mach/map.h | |
| parent | 701eb2647d7986b42fa973990649a83b3e15e8eb (diff) | |
ARM: Add fixed PCI i/o mapping
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>
Diffstat (limited to 'arch/arm/include/asm/mach/map.h')
| -rw-r--r-- | arch/arm/include/asm/mach/map.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mach/map.h b/arch/arm/include/asm/mach/map.h index a6efcdd6fd25..195ac2f9d3d3 100644 --- a/arch/arm/include/asm/mach/map.h +++ b/arch/arm/include/asm/mach/map.h @@ -9,6 +9,9 @@ * * Page table mapping constructs and function prototypes */ +#ifndef __ASM_MACH_MAP_H +#define __ASM_MACH_MAP_H + #include <asm/io.h> struct map_desc { @@ -34,6 +37,8 @@ struct map_desc { #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); @@ -44,4 +49,7 @@ 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 |