[PATCH] sparsemem memory model for i386
Provide the architecture specific implementation for SPARSEMEM for i386 SMP
and NUMA systems.
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Martin Bligh <mbligh@aracnet.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-i386/mmzone.h b/include/asm-i386/mmzone.h
index 48e46d4..33ce5d3 100644
--- a/include/asm-i386/mmzone.h
+++ b/include/asm-i386/mmzone.h
@@ -8,7 +8,9 @@
#include <asm/smp.h>
-#ifdef CONFIG_DISCONTIGMEM
+#if CONFIG_NUMA
+extern struct pglist_data *node_data[];
+#define NODE_DATA(nid) (node_data[nid])
#ifdef CONFIG_NUMA
#ifdef CONFIG_X86_NUMAQ
@@ -21,8 +23,28 @@
#define get_zholes_size(n) (0)
#endif /* CONFIG_NUMA */
-extern struct pglist_data *node_data[];
-#define NODE_DATA(nid) (node_data[nid])
+extern int get_memcfg_numa_flat(void );
+/*
+ * This allows any one NUMA architecture to be compiled
+ * for, and still fall back to the flat function if it
+ * fails.
+ */
+static inline void get_memcfg_numa(void)
+{
+#ifdef CONFIG_X86_NUMAQ
+ if (get_memcfg_numaq())
+ return;
+#elif CONFIG_ACPI_SRAT
+ if (get_memcfg_from_srat())
+ return;
+#endif
+
+ get_memcfg_numa_flat();
+}
+
+#endif /* CONFIG_NUMA */
+
+#ifdef CONFIG_DISCONTIGMEM
/*
* generic node memory support, the following assumptions apply:
@@ -48,26 +70,6 @@
#endif
}
-/*
- * Following are macros that are specific to this numa platform.
- */
-#define reserve_bootmem(addr, size) \
- reserve_bootmem_node(NODE_DATA(0), (addr), (size))
-#define alloc_bootmem(x) \
- __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
-#define alloc_bootmem_low(x) \
- __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
-#define alloc_bootmem_pages(x) \
- __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
-#define alloc_bootmem_low_pages(x) \
- __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
-#define alloc_bootmem_node(ignore, x) \
- __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
-#define alloc_bootmem_pages_node(ignore, x) \
- __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
-#define alloc_bootmem_low_pages_node(ignore, x) \
- __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
-
#define node_localnr(pfn, nid) ((pfn) - node_data[nid]->node_start_pfn)
/*
@@ -121,29 +123,34 @@
return (pfn < node_end_pfn(nid));
return 0;
}
-#endif
-
-extern int get_memcfg_numa_flat(void );
-/*
- * This allows any one NUMA architecture to be compiled
- * for, and still fall back to the flat function if it
- * fails.
- */
-static inline void get_memcfg_numa(void)
-{
-#ifdef CONFIG_X86_NUMAQ
- if (get_memcfg_numaq())
- return;
-#elif CONFIG_ACPI_SRAT
- if (get_memcfg_from_srat())
- return;
-#endif
-
- get_memcfg_numa_flat();
-}
+#endif /* CONFIG_X86_NUMAQ */
#endif /* CONFIG_DISCONTIGMEM */
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+
+/*
+ * Following are macros that are specific to this numa platform.
+ */
+#define reserve_bootmem(addr, size) \
+ reserve_bootmem_node(NODE_DATA(0), (addr), (size))
+#define alloc_bootmem(x) \
+ __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
+#define alloc_bootmem_low(x) \
+ __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
+#define alloc_bootmem_pages(x) \
+ __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
+#define alloc_bootmem_low_pages(x) \
+ __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
+#define alloc_bootmem_node(ignore, x) \
+ __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
+#define alloc_bootmem_pages_node(ignore, x) \
+ __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
+#define alloc_bootmem_low_pages_node(ignore, x) \
+ __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
+
+#endif /* CONFIG_NEED_MULTIPLE_NODES */
+
extern int early_pfn_to_nid(unsigned long pfn);
#endif /* _ASM_MMZONE_H_ */
diff --git a/include/asm-i386/page.h b/include/asm-i386/page.h
index 8f3dded..dea8f8e 100644
--- a/include/asm-i386/page.h
+++ b/include/asm-i386/page.h
@@ -137,11 +137,11 @@
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-#ifndef CONFIG_DISCONTIGMEM
+#ifdef CONFIG_FLATMEM
#define pfn_to_page(pfn) (mem_map + (pfn))
#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
#define pfn_valid(pfn) ((pfn) < max_mapnr)
-#endif /* !CONFIG_DISCONTIGMEM */
+#endif /* CONFIG_FLATMEM */
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index e9efe14..77c6497 100644
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -398,9 +398,9 @@
#endif /* !__ASSEMBLY__ */
-#ifndef CONFIG_DISCONTIGMEM
+#ifdef CONFIG_FLATMEM
#define kern_addr_valid(addr) (1)
-#endif /* !CONFIG_DISCONTIGMEM */
+#endif /* CONFIG_FLATMEM */
#define io_remap_page_range(vma, vaddr, paddr, size, prot) \
remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
diff --git a/include/asm-i386/sparsemem.h b/include/asm-i386/sparsemem.h
new file mode 100644
index 0000000..cfeed99
--- /dev/null
+++ b/include/asm-i386/sparsemem.h
@@ -0,0 +1,31 @@
+#ifndef _I386_SPARSEMEM_H
+#define _I386_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: how big each section will be
+ * MAX_PHYSADDR_BITS 2^N: how much physical address space we have
+ * MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space
+ */
+#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
+
+/* XXX: FIXME -- wli */
+#define kern_addr_valid(kaddr) (0)
+
+#endif /* CONFIG_SPARSEMEM */
+#endif /* _I386_SPARSEMEM_H */