OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ARM: tegra: use section-sized static mappings for LPAE too 

The static mappings for Tegra's PPSB and APB regions were sized at 1MB
in order to allow mapping via sections in order to avoid burning RAM for
PTEs. On LPAE, sections are 2MB, so the static mappings need to be
larger in order to gain the same benefit. Set IO_{PPSB,APB}_SIZE to
SECTION_SIZE so this adjusts automatically.

While we're fiddling with iomap.h, compress IO_{IRAM,CPU}_VIRT together
to save virtual address space in the vmalloc region; these two regions
are mapped using PTEs.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Stephen Warren 2013-10-29 13:47:21 -06:00
parent 2f1d70af28
commit 6dee8200b7
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/arm/mach-tegra/iomap.h
View File

@ -19,6 +19,7 @@
#ifndef __MACH_TEGRA_IOMAP_H
#define __MACH_TEGRA_IOMAP_H
#include <asm/pgtable.h>
#include <asm/sizes.h>
#define TEGRA_IRAM_BASE 0x40000000
@ -115,27 +116,26 @@
* two 256MB io windows (that actually only use about 64KB
* at the start of each).
*
* We will just map the first 1MB of each window (to minimize
* We will just map the first MMU section of each window (to minimize
* pt entries needed) and provide a macro to transform physical
* io addresses to an appropriate void __iomem *.
*
*/
#define IO_IRAM_PHYS 0x40000000
#define IO_IRAM_VIRT IOMEM(0xFE400000)
#define IO_IRAM_SIZE SZ_256K
#define IO_CPU_PHYS 0x50040000
#define IO_CPU_VIRT IOMEM(0xFE000000)
#define IO_CPU_PHYS 0x50040000
#define IO_CPU_VIRT IOMEM(0xFE440000)
#define IO_CPU_SIZE SZ_16K
#define IO_PPSB_PHYS 0x60000000
#define IO_PPSB_VIRT IOMEM(0xFE200000)
#define IO_PPSB_SIZE SZ_1M
#define IO_PPSB_SIZE SECTION_SIZE
#define IO_APB_PHYS 0x70000000
#define IO_APB_VIRT IOMEM(0xFE300000)
#define IO_APB_SIZE SZ_1M
#define IO_APB_VIRT IOMEM(0xFE000000)
#define IO_APB_SIZE SECTION_SIZE
#define IO_TO_VIRT_BETWEEN(p, st, sz) ((p) >= (st) && (p) < ((st) + (sz)))
#define IO_TO_VIRT_XLATE(p, pst, vst) (((p) - (pst) + (vst)))