Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask

[pandora-kernel.git] / arch / x86 / kernel / setup.c

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 900dad7..b415843 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -112,8 +112,13 @@
 #define ARCH_SETUP
 #endif
 
+RESERVE_BRK(dmi_alloc, 65536);
+
 unsigned int boot_cpu_id __read_mostly;
 
+static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
+unsigned long _brk_end = (unsigned long)__brk_base;
+
 #ifdef CONFIG_X86_64
 int default_cpu_present_to_apicid(int mps_cpu)
 {
@@ -158,12 +163,6 @@ static struct resource bss_resource = {
 
 
 #ifdef CONFIG_X86_32
-/* This value is set up by the early boot code to point to the value
-   immediately after the boot time page tables.  It contains a *physical*
-   address, and must not be in the .bss segment! */
-unsigned long init_pg_tables_start __initdata = ~0UL;
-unsigned long init_pg_tables_end __initdata = ~0UL;
-
 static struct resource video_ram_resource = {
        .name   = "Video RAM area",
        .start  = 0xa0000,
@@ -202,7 +201,9 @@ struct ist_info ist_info;
 #endif
 
 #else
-struct cpuinfo_x86 boot_cpu_data __read_mostly;
+struct cpuinfo_x86 boot_cpu_data __read_mostly = {
+       .x86_phys_bits = MAX_PHYSMEM_BITS,
+};
 EXPORT_SYMBOL(boot_cpu_data);
 #endif
 
@@ -216,12 +217,6 @@ unsigned long mmu_cr4_features = X86_CR4_PAE;
 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
 int bootloader_type;
 
-/*
- * Early DMI memory
- */
-int dmi_alloc_index;
-char dmi_alloc_data[DMI_MAX_DATA];
-
 /*
  * Setup options
  */
@@ -267,6 +262,35 @@ static inline void copy_edd(void)
 }
 #endif
 
+void * __init extend_brk(size_t size, size_t align)
+{
+       size_t mask = align - 1;
+       void *ret;
+
+       BUG_ON(_brk_start == 0);
+       BUG_ON(align & mask);
+
+       _brk_end = (_brk_end + mask) & ~mask;
+       BUG_ON((char *)(_brk_end + size) > __brk_limit);
+
+       ret = (void *)_brk_end;
+       _brk_end += size;
+
+       memset(ret, 0, size);
+
+       return ret;
+}
+
+static void __init reserve_brk(void)
+{
+       if (_brk_end > _brk_start)
+               reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK");
+
+       /* Mark brk area as locked down and no longer taking any
+          new allocations */
+       _brk_start = 0;
+}
+
 #ifdef CONFIG_BLK_DEV_INITRD
 
 #ifdef CONFIG_X86_32
@@ -715,11 +739,7 @@ void __init setup_arch(char **cmdline_p)
        init_mm.start_code = (unsigned long) _text;
        init_mm.end_code = (unsigned long) _etext;
        init_mm.end_data = (unsigned long) _edata;
-#ifdef CONFIG_X86_32
-       init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
-#else
-       init_mm.brk = (unsigned long) &_end;
-#endif
+       init_mm.brk = _brk_end;
 
        code_resource.start = virt_to_phys(_text);
        code_resource.end = virt_to_phys(_etext)-1;
@@ -840,6 +860,8 @@ void __init setup_arch(char **cmdline_p)
        setup_bios_corruption_check();
 #endif
 
+       reserve_brk();
+
        /* max_pfn_mapped is updated here */
        max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
        max_pfn_mapped = max_low_pfn_mapped;