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| author | Michal Simek <monstr@monstr.eu> | 2011-12-22 12:33:24 +0100 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2012-03-23 09:28:14 +0100 |
| commit | 7c0d26150781cbd8a522259c9dea9e7ef23df8e3 (patch) | |
| tree | f0324f4c59a50c74340ab198eda0832085e9be81 /arch | |
| parent | microblaze: Highmem support (diff) | |
| download | linux-7c0d26150781cbd8a522259c9dea9e7ef23df8e3.tar.xz linux-7c0d26150781cbd8a522259c9dea9e7ef23df8e3.zip | |
microblaze: Fix mapin_ram function
Fix how many pages are allocated in mapin_ram. It is lowmem_size
not setup CONFIG_LOWMEM_SIZE because it is the same for all systems.
Which means that wrong pages are allocated if memory size is smaller
than CONFIG_LOWMEM_SIZE. It has dramatic impact on bootup time.
On sp605 MMU full hw design is 7s.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/microblaze/include/asm/page.h | 1 | ||||
| -rw-r--r-- | arch/microblaze/mm/pgtable.c | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h index 665f29330ce1..352cc2352bd5 100644 --- a/arch/microblaze/include/asm/page.h +++ b/arch/microblaze/include/asm/page.h @@ -136,6 +136,7 @@ extern unsigned long max_pfn; extern unsigned long memory_start; extern unsigned long memory_size; +extern unsigned long lowmem_size; extern int page_is_ram(unsigned long pfn); diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c index 84905da83cb7..d1c06d07fed8 100644 --- a/arch/microblaze/mm/pgtable.c +++ b/arch/microblaze/mm/pgtable.c @@ -167,7 +167,7 @@ void __init mapin_ram(void) v = CONFIG_KERNEL_START; p = memory_start; - for (s = 0; s < CONFIG_LOWMEM_SIZE; s += PAGE_SIZE) { + for (s = 0; s < lowmem_size; s += PAGE_SIZE) { f = _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_SHARED | _PAGE_HWEXEC; if ((char *) v < _stext || (char *) v >= _etext) |