66aa230e43
Impact: unification of declarations, cleanup Unification of declarations: moved init_memory_mapping, initmem_init and free_initmem from page_XX_types.h to page_types.h Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <1239693869.3033.31.camel@ht.satnam> Signed-off-by: Ingo Molnar <mingo@elte.hu>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
#ifndef _ASM_X86_PAGE_32_DEFS_H
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#define _ASM_X86_PAGE_32_DEFS_H
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#include <linux/const.h>
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/*
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* This handles the memory map.
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*
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* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
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* a virtual address space of one gigabyte, which limits the
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* amount of physical memory you can use to about 950MB.
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*
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* If you want more physical memory than this then see the CONFIG_HIGHMEM4G
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* and CONFIG_HIGHMEM64G options in the kernel configuration.
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*/
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#define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
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#ifdef CONFIG_4KSTACKS
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#define THREAD_ORDER 0
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#else
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#define THREAD_ORDER 1
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#endif
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#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
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#define STACKFAULT_STACK 0
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#define DOUBLEFAULT_STACK 1
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#define NMI_STACK 0
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#define DEBUG_STACK 0
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#define MCE_STACK 0
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#define N_EXCEPTION_STACKS 1
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#ifdef CONFIG_X86_PAE
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/* 44=32+12, the limit we can fit into an unsigned long pfn */
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#define __PHYSICAL_MASK_SHIFT 44
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#define __VIRTUAL_MASK_SHIFT 32
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#else /* !CONFIG_X86_PAE */
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#define __PHYSICAL_MASK_SHIFT 32
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#define __VIRTUAL_MASK_SHIFT 32
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#endif /* CONFIG_X86_PAE */
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/*
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* Kernel image size is limited to 512 MB (see in arch/x86/kernel/head_32.S)
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*/
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#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
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#ifndef __ASSEMBLY__
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/*
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* This much address space is reserved for vmalloc() and iomap()
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* as well as fixmap mappings.
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*/
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extern unsigned int __VMALLOC_RESERVE;
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extern int sysctl_legacy_va_layout;
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extern void find_low_pfn_range(void);
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extern void setup_bootmem_allocator(void);
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_X86_PAGE_32_DEFS_H */
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