]>
git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/asm-x86/sparsemem.h
1 #ifndef _ASM_X86_SPARSEMEM_H
2 #define _ASM_X86_SPARSEMEM_H
4 #ifdef CONFIG_SPARSEMEM
6 * generic non-linear memory support:
8 * 1) we will not split memory into more chunks than will fit into the flags
9 * field of the struct page
11 * SECTION_SIZE_BITS 2^n: size of each section
12 * MAX_PHYSADDR_BITS 2^n: max size of physical address space
13 * MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space
18 # ifdef CONFIG_X86_PAE
19 # define SECTION_SIZE_BITS 30
20 # define MAX_PHYSADDR_BITS 36
21 # define MAX_PHYSMEM_BITS 36
23 # define SECTION_SIZE_BITS 26
24 # define MAX_PHYSADDR_BITS 32
25 # define MAX_PHYSMEM_BITS 32
27 #else /* CONFIG_X86_32 */
28 # define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */
29 # define MAX_PHYSADDR_BITS 40
30 # define MAX_PHYSMEM_BITS 40
33 #endif /* CONFIG_SPARSEMEM */