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Commit 7c0d2615 authored by Michal Simek's avatar Michal Simek
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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: default avatarMichal Simek <monstr@monstr.eu>
parent 2f2f371f

arch/microblaze/include/asm/page.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

arch/microblaze/mm/pgtable.c

+1 −1
Original line number Diff line number Diff line
@@ -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)