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authorLinus Torvalds <torvalds@linux-foundation.org>2009-06-10 19:13:20 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-10 19:13:20 -0400
commitbb7762961d3ce745688e9050e914c1d3f980268d (patch)
treee841f58cd6188cc44583cd055798b4475a4d68f0 /arch/x86/kernel/setup.c
parent48c72d1ab4ec86789a23aed0b0b5f31ac083c0c6 (diff)
parent35d5a9a61490bf39d2e48d7f499c8c801a39ebe9 (diff)
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (22 commits) x86: fix system without memory on node0 x86, mm: Fix node_possible_map logic mm, x86: remove MEMORY_HOTPLUG_RESERVE related code x86: make sparse mem work in non-NUMA mode x86: process.c, remove useless headers x86: merge process.c a bit x86: use sparse_memory_present_with_active_regions() on UMA x86: unify 64-bit UMA and NUMA paging_init() x86: Allow 1MB of slack between the e820 map and SRAT, not 4GB x86: Sanity check the e820 against the SRAT table using e820 map only x86: clean up and and print out initial max_pfn_mapped x86/pci: remove rounding quirk from e820_setup_gap() x86, e820, pci: reserve extra free space near end of RAM x86: fix typo in address space documentation x86: 46 bit physical address support on 64 bits x86, mm: fault.c, use printk_once() in is_errata93() x86: move per-cpu mmu_gathers to mm/init.c x86: move max_pfn_mapped and max_low_pfn_mapped to setup.c x86: unify noexec handling x86: remove (null) in /sys kernel_page_tables ...
Diffstat (limited to 'arch/x86/kernel/setup.c')
-rw-r--r--arch/x86/kernel/setup.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 7791eef95b91..d1c636bf31a7 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -112,6 +112,14 @@
112#define ARCH_SETUP 112#define ARCH_SETUP
113#endif 113#endif
114 114
115/*
116 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
117 * The direct mapping extends to max_pfn_mapped, so that we can directly access
118 * apertures, ACPI and other tables without having to play with fixmaps.
119 */
120unsigned long max_low_pfn_mapped;
121unsigned long max_pfn_mapped;
122
115RESERVE_BRK(dmi_alloc, 65536); 123RESERVE_BRK(dmi_alloc, 65536);
116 124
117unsigned int boot_cpu_id __read_mostly; 125unsigned int boot_cpu_id __read_mostly;
@@ -860,12 +868,16 @@ void __init setup_arch(char **cmdline_p)
860 max_low_pfn = max_pfn; 868 max_low_pfn = max_pfn;
861 869
862 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; 870 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
871 max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT;
863#endif 872#endif
864 873
865#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION 874#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
866 setup_bios_corruption_check(); 875 setup_bios_corruption_check();
867#endif 876#endif
868 877
878 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
879 max_pfn_mapped<<PAGE_SHIFT);
880
869 reserve_brk(); 881 reserve_brk();
870 882
871 /* max_pfn_mapped is updated here */ 883 /* max_pfn_mapped is updated here */