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x86: clean up and and print out initial max_pfn_mapped 

Do this so we can check the range that is mapped before
init_memory_mapping().

To be able to print out meaningful info, we first have to fix
64-bit to have max_pfn_mapped assigned before that call. This
also unifies the code-path a bit.

[ Impact: print more debug info, cleanup ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <49BF0978.40605@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2009-05-09 23:47:42 -07:00 committed by Ingo Molnar
parent 5d423ccd7b
commit 80989ce064
2 changed files with 7 additions and 4 deletions
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4
arch/x86/kernel/setup.c
View File

@ -862,12 +862,16 @@ void __init setup_arch(char **cmdline_p)
max_low_pfn = max_pfn;
high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT;
#endif
#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
setup_bios_corruption_check();
#endif
printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);
reserve_brk();
/* max_pfn_mapped is updated here */

7
arch/x86/mm/init.c
View File

@ -132,12 +132,11 @@ static void __init find_early_table_space(unsigned long end, int use_pse,
*/
#ifdef CONFIG_X86_32
start = 0x7000;
#else
start = 0x8000;
#endif
e820_table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
tables, PAGE_SIZE);
#else /* CONFIG_X86_64 */
start = 0x8000;
e820_table_start = find_e820_area(start, end, tables, PAGE_SIZE);
#endif
if (e820_table_start == -1UL)
panic("Cannot find space for the kernel page tables");