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379 lines
11 KiB
379 lines
11 KiB
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
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*/
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#ifndef _LINUX_BOOTMEM_H
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#define _LINUX_BOOTMEM_H
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#include <linux/mmzone.h>
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#include <linux/mm_types.h>
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#include <asm/dma.h>
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#include <asm/processor.h>
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#include <linux/memblock.h>
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/*
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* simple boot-time physical memory area allocator.
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*/
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extern unsigned long max_low_pfn;
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extern unsigned long min_low_pfn;
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/*
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* highest page
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*/
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extern unsigned long max_pfn;
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/*
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* highest possible page
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*/
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extern unsigned long long max_possible_pfn;
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#ifndef CONFIG_NO_BOOTMEM
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/*
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* node_bootmem_map is a map pointer - the bits represent all physical
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* memory pages (including holes) on the node.
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*/
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typedef struct bootmem_data {
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unsigned long node_min_pfn;
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unsigned long node_low_pfn;
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void *node_bootmem_map;
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unsigned long last_end_off;
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unsigned long hint_idx;
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struct list_head list;
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} bootmem_data_t;
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extern bootmem_data_t bootmem_node_data[];
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#endif
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extern unsigned long bootmem_bootmap_pages(unsigned long);
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extern unsigned long init_bootmem_node(pg_data_t *pgdat,
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unsigned long freepfn,
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unsigned long startpfn,
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unsigned long endpfn);
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extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
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extern unsigned long free_all_bootmem(void);
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extern void reset_node_managed_pages(pg_data_t *pgdat);
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extern void reset_all_zones_managed_pages(void);
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extern void free_bootmem_node(pg_data_t *pgdat,
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unsigned long addr,
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unsigned long size);
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extern void free_bootmem(unsigned long physaddr, unsigned long size);
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extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
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/*
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* Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
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* the architecture-specific code should honor this).
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*
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* If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
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* If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
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* already was reserved.
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*/
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#define BOOTMEM_DEFAULT 0
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#define BOOTMEM_EXCLUSIVE (1<<0)
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extern int reserve_bootmem(unsigned long addr,
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unsigned long size,
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int flags);
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extern int reserve_bootmem_node(pg_data_t *pgdat,
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unsigned long physaddr,
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unsigned long size,
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int flags);
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extern void *__alloc_bootmem(unsigned long size,
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unsigned long align,
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unsigned long goal);
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extern void *__alloc_bootmem_nopanic(unsigned long size,
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unsigned long align,
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unsigned long goal) __malloc;
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extern void *__alloc_bootmem_node(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal) __malloc;
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void *__alloc_bootmem_node_high(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal) __malloc;
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extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal) __malloc;
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void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal,
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unsigned long limit) __malloc;
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extern void *__alloc_bootmem_low(unsigned long size,
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unsigned long align,
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unsigned long goal) __malloc;
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void *__alloc_bootmem_low_nopanic(unsigned long size,
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unsigned long align,
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unsigned long goal) __malloc;
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extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal) __malloc;
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#ifdef CONFIG_NO_BOOTMEM
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/* We are using top down, so it is safe to use 0 here */
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#define BOOTMEM_LOW_LIMIT 0
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#else
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#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
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#endif
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#ifndef ARCH_LOW_ADDRESS_LIMIT
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#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
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#endif
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#define alloc_bootmem(x) \
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__alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_align(x, align) \
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__alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_nopanic(x) \
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__alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_pages(x) \
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__alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_pages_nopanic(x) \
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__alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_node(pgdat, x) \
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__alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_node_nopanic(pgdat, x) \
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__alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_pages_node(pgdat, x) \
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__alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
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__alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
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#define alloc_bootmem_low(x) \
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__alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
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#define alloc_bootmem_low_pages_nopanic(x) \
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__alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
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#define alloc_bootmem_low_pages(x) \
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__alloc_bootmem_low(x, PAGE_SIZE, 0)
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#define alloc_bootmem_low_pages_node(pgdat, x) \
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__alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
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#if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
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/* FIXME: use MEMBLOCK_ALLOC_* variants here */
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#define BOOTMEM_ALLOC_ACCESSIBLE 0
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#define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
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/* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
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void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
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phys_addr_t align, phys_addr_t min_addr,
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phys_addr_t max_addr, int nid);
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void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
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phys_addr_t min_addr, phys_addr_t max_addr, int nid);
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void __memblock_free_early(phys_addr_t base, phys_addr_t size);
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void __memblock_free_late(phys_addr_t base, phys_addr_t size);
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static inline void * __init memblock_virt_alloc(
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phys_addr_t size, phys_addr_t align)
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{
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memblock_dbg("%s: %llu bytes align=0x%llx %pF\n",
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__func__, (u64)size, (u64)align, (void *)_RET_IP_);
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return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
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BOOTMEM_ALLOC_ACCESSIBLE,
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NUMA_NO_NODE);
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}
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static inline void * __init memblock_virt_alloc_nopanic(
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phys_addr_t size, phys_addr_t align)
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{
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return memblock_virt_alloc_try_nid_nopanic(size, align,
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BOOTMEM_LOW_LIMIT,
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BOOTMEM_ALLOC_ACCESSIBLE,
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NUMA_NO_NODE);
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}
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static inline void * __init memblock_virt_alloc_low(
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phys_addr_t size, phys_addr_t align)
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{
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return memblock_virt_alloc_try_nid(size, align,
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BOOTMEM_LOW_LIMIT,
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ARCH_LOW_ADDRESS_LIMIT,
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NUMA_NO_NODE);
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}
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static inline void * __init memblock_virt_alloc_low_nopanic(
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phys_addr_t size, phys_addr_t align)
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{
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return memblock_virt_alloc_try_nid_nopanic(size, align,
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BOOTMEM_LOW_LIMIT,
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ARCH_LOW_ADDRESS_LIMIT,
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NUMA_NO_NODE);
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}
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static inline void * __init memblock_virt_alloc_from_nopanic(
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phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
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{
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return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
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BOOTMEM_ALLOC_ACCESSIBLE,
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NUMA_NO_NODE);
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}
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static inline void * __init memblock_virt_alloc_node(
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phys_addr_t size, int nid)
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{
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return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
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BOOTMEM_ALLOC_ACCESSIBLE, nid);
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}
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static inline void * __init memblock_virt_alloc_node_nopanic(
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phys_addr_t size, int nid)
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{
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return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
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BOOTMEM_ALLOC_ACCESSIBLE,
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nid);
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}
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static inline void __init memblock_free_early(
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phys_addr_t base, phys_addr_t size)
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{
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__memblock_free_early(base, size);
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}
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static inline void __init memblock_free_early_nid(
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phys_addr_t base, phys_addr_t size, int nid)
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{
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__memblock_free_early(base, size);
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}
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static inline void __init memblock_free_late(
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phys_addr_t base, phys_addr_t size)
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{
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__memblock_free_late(base, size);
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}
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#else
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#define BOOTMEM_ALLOC_ACCESSIBLE 0
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/* Fall back to all the existing bootmem APIs */
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static inline void * __init memblock_virt_alloc(
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phys_addr_t size, phys_addr_t align)
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{
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if (!align)
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align = SMP_CACHE_BYTES;
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return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
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}
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static inline void * __init memblock_virt_alloc_nopanic(
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phys_addr_t size, phys_addr_t align)
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{
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if (!align)
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align = SMP_CACHE_BYTES;
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return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
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}
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static inline void * __init memblock_virt_alloc_low(
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phys_addr_t size, phys_addr_t align)
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{
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if (!align)
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align = SMP_CACHE_BYTES;
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return __alloc_bootmem_low(size, align, 0);
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}
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static inline void * __init memblock_virt_alloc_low_nopanic(
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phys_addr_t size, phys_addr_t align)
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{
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if (!align)
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align = SMP_CACHE_BYTES;
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return __alloc_bootmem_low_nopanic(size, align, 0);
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}
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static inline void * __init memblock_virt_alloc_from_nopanic(
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phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
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{
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return __alloc_bootmem_nopanic(size, align, min_addr);
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}
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static inline void * __init memblock_virt_alloc_node(
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phys_addr_t size, int nid)
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{
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return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
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BOOTMEM_LOW_LIMIT);
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}
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static inline void * __init memblock_virt_alloc_node_nopanic(
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phys_addr_t size, int nid)
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{
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return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
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SMP_CACHE_BYTES,
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BOOTMEM_LOW_LIMIT);
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}
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static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
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phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
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{
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return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
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min_addr);
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}
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static inline void * __init memblock_virt_alloc_try_nid_nopanic(
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phys_addr_t size, phys_addr_t align,
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phys_addr_t min_addr, phys_addr_t max_addr, int nid)
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{
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return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
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min_addr, max_addr);
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}
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static inline void __init memblock_free_early(
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phys_addr_t base, phys_addr_t size)
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{
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free_bootmem(base, size);
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}
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static inline void __init memblock_free_early_nid(
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phys_addr_t base, phys_addr_t size, int nid)
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{
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free_bootmem_node(NODE_DATA(nid), base, size);
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}
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static inline void __init memblock_free_late(
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phys_addr_t base, phys_addr_t size)
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{
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free_bootmem_late(base, size);
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}
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#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
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#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
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extern void *alloc_remap(int nid, unsigned long size);
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#else
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static inline void *alloc_remap(int nid, unsigned long size)
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{
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return NULL;
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}
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#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
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extern void *alloc_large_system_hash(const char *tablename,
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unsigned long bucketsize,
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unsigned long numentries,
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int scale,
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int flags,
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unsigned int *_hash_shift,
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unsigned int *_hash_mask,
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unsigned long low_limit,
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unsigned long high_limit);
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#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
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#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
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* shift passed via *_hash_shift */
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#define HASH_ZERO 0x00000004 /* Zero allocated hash table */
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/* Only NUMA needs hash distribution. 64bit NUMA architectures have
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* sufficient vmalloc space.
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*/
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#ifdef CONFIG_NUMA
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#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
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extern int hashdist; /* Distribute hashes across NUMA nodes? */
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#else
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#define hashdist (0)
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#endif
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#endif /* _LINUX_BOOTMEM_H */
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