diff options
Diffstat (limited to 'arch/x86/include/asm/sparsemem.h')
| -rw-r--r-- | arch/x86/include/asm/sparsemem.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/x86/include/asm/sparsemem.h b/arch/x86/include/asm/sparsemem.h new file mode 100644 index 000000000..6a9ccc1b2 --- /dev/null +++ b/arch/x86/include/asm/sparsemem.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#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_PHYSMEM_BITS 2^n: max size of physical address space + * + */ + +#ifdef CONFIG_X86_32 +# ifdef CONFIG_X86_PAE +# define SECTION_SIZE_BITS 29 +# define MAX_PHYSMEM_BITS 36 +# else +# define SECTION_SIZE_BITS 26 +# define MAX_PHYSMEM_BITS 32 +# endif +#else /* CONFIG_X86_32 */ +# define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */ +# define MAX_PHYSMEM_BITS (pgtable_l5_enabled() ? 52 : 46) +#endif + +#endif /* CONFIG_SPARSEMEM */ + +#ifndef __ASSEMBLY__ +#ifdef CONFIG_NUMA_KEEP_MEMINFO +extern int phys_to_target_node(phys_addr_t start); +#define phys_to_target_node phys_to_target_node +extern int memory_add_physaddr_to_nid(u64 start); +#define memory_add_physaddr_to_nid memory_add_physaddr_to_nid +#endif +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_X86_SPARSEMEM_H */ |