From d39af90265feb40ec198c4ca8268724645b4b50e Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Mon, 11 Apr 2016 21:14:17 +0300 Subject: 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 --- arch/xtensa/mm/init.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'arch/xtensa/mm/init.c') diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c index 4d7142beac72..302fa72d0d5a 100644 --- a/arch/xtensa/mm/init.c +++ b/arch/xtensa/mm/init.c @@ -266,8 +266,7 @@ void __init bootmem_init(void) if (min_low_pfn > max_pfn) panic("No memory found!\n"); - max_low_pfn = max_pfn < MAX_MEM_PFN >> PAGE_SHIFT ? - max_pfn : MAX_MEM_PFN >> PAGE_SHIFT; + max_low_pfn = min(max_pfn, MAX_LOW_PFN); /* Find an area to use for the bootmem bitmap. */ -- cgit v1.2.3-55-g7522