35 lines
868 B
C
35 lines
868 B
C
#ifndef _ASM_X86_SPARSEMEM_H
|
|
#define _ASM_X86_SPARSEMEM_H
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
/*
|
|
* generic non-linear memory support:
|
|
*
|
|
* 1) we will not split memory into more chunks than will fit into the flags
|
|
* field of the struct page
|
|
*
|
|
* SECTION_SIZE_BITS 2^n: size of each section
|
|
* MAX_PHYSADDR_BITS 2^n: max size of physical address space
|
|
* MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space
|
|
*
|
|
*/
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# ifdef CONFIG_X86_PAE
|
|
# define SECTION_SIZE_BITS 30
|
|
# define MAX_PHYSADDR_BITS 36
|
|
# define MAX_PHYSMEM_BITS 36
|
|
# else
|
|
# define SECTION_SIZE_BITS 26
|
|
# define MAX_PHYSADDR_BITS 32
|
|
# define MAX_PHYSMEM_BITS 32
|
|
# endif
|
|
#else /* CONFIG_X86_32 */
|
|
# define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */
|
|
# define MAX_PHYSADDR_BITS 40
|
|
# define MAX_PHYSMEM_BITS 40
|
|
#endif
|
|
|
|
#endif /* CONFIG_SPARSEMEM */
|
|
#endif
|