--- /dev/null
+#ifndef _LINUX_MEMBLOCK_H
+#define _LINUX_MEMBLOCK_H
+#ifdef __KERNEL__
+
+#ifdef CONFIG_HAVE_MEMBLOCK
+/*
+ * Logical memory blocks.
+ *
+ * Copyright (C) 2001 Peter Bergner, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/mm.h>
+
+#define INIT_MEMBLOCK_REGIONS 128
+#define INIT_PHYSMEM_REGIONS 4
+
+/* Definition of memblock flags. */
+#define MEMBLOCK_HOTPLUG 0x1 /* hotpluggable region */
+
+struct memblock_region {
+ phys_addr_t base;
+ phys_addr_t size;
+ unsigned long flags;
+#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
+ int nid;
+#endif
+};
+
+struct memblock_type {
+ unsigned long cnt; /* number of regions */
+ unsigned long max; /* size of the allocated array */
+ phys_addr_t total_size; /* size of all regions */
+ struct memblock_region *regions;
+};
+
+struct memblock {
+ bool bottom_up; /* is bottom up direction? */
+ phys_addr_t current_limit;
+ struct memblock_type memory;
+ struct memblock_type reserved;
+#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
+ struct memblock_type physmem;
+#endif
+};
+
+extern struct memblock memblock;
+extern int memblock_debug;
+#ifdef CONFIG_MOVABLE_NODE
+/* If movable_node boot option specified */
+extern bool movable_node_enabled;
+#endif /* CONFIG_MOVABLE_NODE */
+
+#define memblock_dbg(fmt, ...) \
+ if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
+
+phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
+ phys_addr_t start, phys_addr_t end,
+ int nid);
+phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
+ phys_addr_t size, phys_addr_t align);
+phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
+phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
+void memblock_allow_resize(void);
+int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
+int memblock_add(phys_addr_t base, phys_addr_t size);
+int memblock_remove(phys_addr_t base, phys_addr_t size);
+int memblock_free(phys_addr_t base, phys_addr_t size);
+int memblock_reserve(phys_addr_t base, phys_addr_t size);
+void memblock_trim_memory(phys_addr_t align);
+int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
+int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
+
+/* Low level functions */
+int memblock_add_range(struct memblock_type *type,
+ phys_addr_t base, phys_addr_t size,
+ int nid, unsigned long flags);
+
+int memblock_remove_range(struct memblock_type *type,
+ phys_addr_t base,
+ phys_addr_t size);
+
+void __next_mem_range(u64 *idx, int nid, struct memblock_type *type_a,
+ struct memblock_type *type_b, phys_addr_t *out_start,
+ phys_addr_t *out_end, int *out_nid);
+
+void __next_mem_range_rev(u64 *idx, int nid, struct memblock_type *type_a,
+ struct memblock_type *type_b, phys_addr_t *out_start,
+ phys_addr_t *out_end, int *out_nid);
+
+/**
+ * for_each_mem_range - iterate through memblock areas from type_a and not
+ * included in type_b. Or just type_a if type_b is NULL.
+ * @i: u64 used as loop variable
+ * @type_a: ptr to memblock_type to iterate
+ * @type_b: ptr to memblock_type which excludes from the iteration
+ * @nid: node selector, %NUMA_NO_NODE for all nodes
+ * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
+ * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
+ * @p_nid: ptr to int for nid of the range, can be %NULL
+ */
+#define for_each_mem_range(i, type_a, type_b, nid, \
+ p_start, p_end, p_nid) \
+ for (i = 0, __next_mem_range(&i, nid, type_a, type_b, \
+ p_start, p_end, p_nid); \
+ i != (u64)ULLONG_MAX; \
+ __next_mem_range(&i, nid, type_a, type_b, \
+ p_start, p_end, p_nid))
+
+/**
+ * for_each_mem_range_rev - reverse iterate through memblock areas from
+ * type_a and not included in type_b. Or just type_a if type_b is NULL.
+ * @i: u64 used as loop variable
+ * @type_a: ptr to memblock_type to iterate
+ * @type_b: ptr to memblock_type which excludes from the iteration
+ * @nid: node selector, %NUMA_NO_NODE for all nodes
+ * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
+ * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
+ * @p_nid: ptr to int for nid of the range, can be %NULL
+ */
+#define for_each_mem_range_rev(i, type_a, type_b, nid, \
+ p_start, p_end, p_nid) \
+ for (i = (u64)ULLONG_MAX, \
+ __next_mem_range_rev(&i, nid, type_a, type_b, \
+ p_start, p_end, p_nid); \
+ i != (u64)ULLONG_MAX; \
+ __next_mem_range_rev(&i, nid, type_a, type_b, \
+ p_start, p_end, p_nid))
+
+#ifdef CONFIG_MOVABLE_NODE
+static inline bool memblock_is_hotpluggable(struct memblock_region *m)
+{
+ return m->flags & MEMBLOCK_HOTPLUG;
+}
+
+static inline bool movable_node_is_enabled(void)
+{
+ return movable_node_enabled;
+}
+#else
+static inline bool memblock_is_hotpluggable(struct memblock_region *m)
+{
+ return false;
+}
+static inline bool movable_node_is_enabled(void)
+{
+ return false;
+}
+#endif
+
+#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
+int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
+ unsigned long *end_pfn);
+void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
+ unsigned long *out_end_pfn, int *out_nid);
+
+/**
+ * for_each_mem_pfn_range - early memory pfn range iterator
+ * @i: an integer used as loop variable
+ * @nid: node selector, %MAX_NUMNODES for all nodes
+ * @p_start: ptr to ulong for start pfn of the range, can be %NULL
+ * @p_end: ptr to ulong for end pfn of the range, can be %NULL
+ * @p_nid: ptr to int for nid of the range, can be %NULL
+ *
+ * Walks over configured memory ranges.
+ */
+#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
+ for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
+ i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
+#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
+
+/**
+ * for_each_free_mem_range - iterate through free memblock areas
+ * @i: u64 used as loop variable
+ * @nid: node selector, %NUMA_NO_NODE for all nodes
+ * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
+ * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
+ * @p_nid: ptr to int for nid of the range, can be %NULL
+ *
+ * Walks over free (memory && !reserved) areas of memblock. Available as
+ * soon as memblock is initialized.
+ */
+#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
+ for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
+ nid, p_start, p_end, p_nid)
+
+/**
+ * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
+ * @i: u64 used as loop variable
+ * @nid: node selector, %NUMA_NO_NODE for all nodes
+ * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
+ * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
+ * @p_nid: ptr to int for nid of the range, can be %NULL
+ *
+ * Walks over free (memory && !reserved) areas of memblock in reverse
+ * order. Available as soon as memblock is initialized.
+ */
+#define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
+ for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
+ nid, p_start, p_end, p_nid)
+
+static inline void memblock_set_region_flags(struct memblock_region *r,
+ unsigned long flags)
+{
+ r->flags |= flags;
+}
+
+static inline void memblock_clear_region_flags(struct memblock_region *r,
+ unsigned long flags)
+{
+ r->flags &= ~flags;
+}
+
+#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
+int memblock_set_node(phys_addr_t base, phys_addr_t size,
+ struct memblock_type *type, int nid);
+
+static inline void memblock_set_region_node(struct memblock_region *r, int nid)
+{
+ r->nid = nid;
+}
+
+static inline int memblock_get_region_node(const struct memblock_region *r)
+{
+ return r->nid;
+}
+#else
+static inline void memblock_set_region_node(struct memblock_region *r, int nid)
+{
+}
+
+static inline int memblock_get_region_node(const struct memblock_region *r)
+{
+ return 0;
+}
+#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
+
+phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
+phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
+
+phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
+
+#ifdef CONFIG_MOVABLE_NODE
+/*
+ * Set the allocation direction to bottom-up or top-down.
+ */
+static inline void __init memblock_set_bottom_up(bool enable)
+{
+ memblock.bottom_up = enable;
+}
+
+/*
+ * Check if the allocation direction is bottom-up or not.
+ * if this is true, that said, memblock will allocate memory
+ * in bottom-up direction.
+ */
+static inline bool memblock_bottom_up(void)
+{
+ return memblock.bottom_up;
+}
+#else
+static inline void __init memblock_set_bottom_up(bool enable) {}
+static inline bool memblock_bottom_up(void) { return false; }
+#endif
+
+/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
+#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
+#define MEMBLOCK_ALLOC_ACCESSIBLE 0
+
+phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
+ phys_addr_t start, phys_addr_t end);
+phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
+ phys_addr_t max_addr);
+phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
+ phys_addr_t max_addr);
+phys_addr_t memblock_phys_mem_size(void);
+phys_addr_t memblock_mem_size(unsigned long limit_pfn);
+phys_addr_t memblock_start_of_DRAM(void);
+phys_addr_t memblock_end_of_DRAM(void);
+void memblock_enforce_memory_limit(phys_addr_t memory_limit);
+int memblock_is_memory(phys_addr_t addr);
+int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
+int memblock_is_reserved(phys_addr_t addr);
+int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
+
+extern void __memblock_dump_all(void);
+
+static inline void memblock_dump_all(void)
+{
+ if (memblock_debug)
+ __memblock_dump_all();
+}
+
+/**
+ * memblock_set_current_limit - Set the current allocation limit to allow
+ * limiting allocations to what is currently
+ * accessible during boot
+ * @limit: New limit value (physical address)
+ */
+void memblock_set_current_limit(phys_addr_t limit);
+
+
+phys_addr_t memblock_get_current_limit(void);
+
+/*
+ * pfn conversion functions
+ *
+ * While the memory MEMBLOCKs should always be page aligned, the reserved
+ * MEMBLOCKs may not be. This accessor attempt to provide a very clear
+ * idea of what they return for such non aligned MEMBLOCKs.
+ */
+
+/**
+ * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
+ * @reg: memblock_region structure
+ */
+static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
+{
+ return PFN_UP(reg->base);
+}
+
+/**
+ * memblock_region_memory_end_pfn - Return the end_pfn this region
+ * @reg: memblock_region structure
+ */
+static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
+{
+ return PFN_DOWN(reg->base + reg->size);
+}
+
+/**
+ * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
+ * @reg: memblock_region structure
+ */
+static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
+{
+ return PFN_DOWN(reg->base);
+}
+
+/**
+ * memblock_region_reserved_end_pfn - Return the end_pfn this region
+ * @reg: memblock_region structure
+ */
+static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
+{
+ return PFN_UP(reg->base + reg->size);
+}
+
+#define for_each_memblock(memblock_type, region) \
+ for (region = memblock.memblock_type.regions; \
+ region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
+ region++)
+
+
+#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
+#define __init_memblock __meminit
+#define __initdata_memblock __meminitdata
+#else
+#define __init_memblock
+#define __initdata_memblock
+#endif
+
+#ifdef CONFIG_MEMTEST
+extern void early_memtest(phys_addr_t start, phys_addr_t end);
+#else
+static inline void early_memtest(phys_addr_t start, phys_addr_t end)
+{
+}
+#endif
+
+#else
+static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
+{
+ return 0;
+}
+
+#endif /* CONFIG_HAVE_MEMBLOCK */
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_MEMBLOCK_H */
Code Review / kvmfornfv.git / blobdiff