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| author | Max Filippov <jcmvbkbc@gmail.com> | 2016-04-11 21:14:17 +0300 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2016-07-24 06:33:58 +0300 |
| commit | d39af90265feb40ec198c4ca8268724645b4b50e (patch) | |
| tree | 32c3aed4a66a243251ca0a9e195c4ba8e6dddeeb /arch/xtensa/include/asm/page.h | |
| parent | f1883aa7d63e3be92ad18da7a1bfc6c9b15c4f9a (diff) | |
| download | linux-d39af90265feb40ec198c4ca8268724645b4b50e.tar.xz | |
xtensa: add alternative kernel memory layouts
MMUv3 is able to support low memory bigger than 128MB.
Implement 256MB and 512MB KSEG layouts:
- add Kconfig selector for KSEG layout;
- add KSEG base address, size and alignment definitions to
arch/xtensa/include/asm/kmem_layout.h;
- use new definitions in TLB initialization;
- add build time memory map consistency checks.
See Documentation/xtensa/mmu.txt for the details of new memory layouts.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/include/asm/page.h')
| -rw-r--r-- | arch/xtensa/include/asm/page.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h index fd12a1977ba8..8a02438232c4 100644 --- a/arch/xtensa/include/asm/page.h +++ b/arch/xtensa/include/asm/page.h @@ -27,10 +27,12 @@ #ifdef CONFIG_MMU #define PAGE_OFFSET XCHAL_KSEG_CACHED_VADDR -#define MAX_MEM_PFN XCHAL_KSEG_SIZE +#define MAX_LOW_PFN (PHYS_PFN(XCHAL_KSEG_PADDR) + \ + PHYS_PFN(XCHAL_KSEG_SIZE)) #else #define PAGE_OFFSET __XTENSA_UL_CONST(0) -#define MAX_MEM_PFN (PLATFORM_DEFAULT_MEM_START + PLATFORM_DEFAULT_MEM_SIZE) +#define MAX_LOW_PFN (PHYS_PFN(PLATFORM_DEFAULT_MEM_START) + \ + PHYS_PFN(PLATFORM_DEFAULT_MEM_SIZE)) #endif #define PGTABLE_START 0x80000000 |