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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/asm-generic/memory_model.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/asm-generic/memory_model.h')
-rw-r--r-- | kernel/include/asm-generic/memory_model.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/kernel/include/asm-generic/memory_model.h b/kernel/include/asm-generic/memory_model.h new file mode 100644 index 000000000..14909b0b9 --- /dev/null +++ b/kernel/include/asm-generic/memory_model.h @@ -0,0 +1,77 @@ +#ifndef __ASM_MEMORY_MODEL_H +#define __ASM_MEMORY_MODEL_H + +#ifndef __ASSEMBLY__ + +#if defined(CONFIG_FLATMEM) + +#ifndef ARCH_PFN_OFFSET +#define ARCH_PFN_OFFSET (0UL) +#endif + +#elif defined(CONFIG_DISCONTIGMEM) + +#ifndef arch_pfn_to_nid +#define arch_pfn_to_nid(pfn) pfn_to_nid(pfn) +#endif + +#ifndef arch_local_page_offset +#define arch_local_page_offset(pfn, nid) \ + ((pfn) - NODE_DATA(nid)->node_start_pfn) +#endif + +#endif /* CONFIG_DISCONTIGMEM */ + +/* + * supports 3 memory models. + */ +#if defined(CONFIG_FLATMEM) + +#define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET)) +#define __page_to_pfn(page) ((unsigned long)((page) - mem_map) + \ + ARCH_PFN_OFFSET) +#elif defined(CONFIG_DISCONTIGMEM) + +#define __pfn_to_page(pfn) \ +({ unsigned long __pfn = (pfn); \ + unsigned long __nid = arch_pfn_to_nid(__pfn); \ + NODE_DATA(__nid)->node_mem_map + arch_local_page_offset(__pfn, __nid);\ +}) + +#define __page_to_pfn(pg) \ +({ const struct page *__pg = (pg); \ + struct pglist_data *__pgdat = NODE_DATA(page_to_nid(__pg)); \ + (unsigned long)(__pg - __pgdat->node_mem_map) + \ + __pgdat->node_start_pfn; \ +}) + +#elif defined(CONFIG_SPARSEMEM_VMEMMAP) + +/* memmap is virtually contiguous. */ +#define __pfn_to_page(pfn) (vmemmap + (pfn)) +#define __page_to_pfn(page) (unsigned long)((page) - vmemmap) + +#elif defined(CONFIG_SPARSEMEM) +/* + * Note: section's mem_map is encoded to reflect its start_pfn. + * section[i].section_mem_map == mem_map's address - start_pfn; + */ +#define __page_to_pfn(pg) \ +({ const struct page *__pg = (pg); \ + int __sec = page_to_section(__pg); \ + (unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec))); \ +}) + +#define __pfn_to_page(pfn) \ +({ unsigned long __pfn = (pfn); \ + struct mem_section *__sec = __pfn_to_section(__pfn); \ + __section_mem_map_addr(__sec) + __pfn; \ +}) +#endif /* CONFIG_FLATMEM/DISCONTIGMEM/SPARSEMEM */ + +#define page_to_pfn __page_to_pfn +#define pfn_to_page __pfn_to_page + +#endif /* __ASSEMBLY__ */ + +#endif |