81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
#ifndef MEMBLOCK_H_
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#define MEMBLOCK_H_
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#include <stddef.h>
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#include <limits.h>
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#include <socks/types.h>
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#define MEMBLOCK_INIT_MEMORY_REGION_COUNT 128
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#define MEMBLOCK_INIT_RESERVED_REGION_COUNT 128
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#define __for_each_mem_range(i, type_a, type_b, p_start, p_end) \
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for ((i)->__idx = 0, __next_memory_region(i, type_a, type_b, p_start, p_end); \
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(i)->__idx != ULLONG_MAX; \
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__next_memory_region(i, type_a, type_b, p_start, p_end))
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#define for_each_mem_range(i, p_start, p_end) \
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__for_each_mem_range(i, &memblock.memory, NULL, p_start, p_end)
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#define for_each_reserved_mem_range(i, p_start, p_end) \
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__for_each_mem_range(i, &memblock.reserved, NULL, p_start, p_end)
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#define for_each_free_mem_range(i, p_start, p_end) \
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__for_each_mem_range(i, &memblock.memory, &memblock.reserved, p_start, p_end)
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typedef uint64_t memblock_index_t;
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typedef enum memblock_region_status {
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/* Used in memblock.memory regions, indicates that the memory region exists */
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MEMBLOCK_MEMORY = 0,
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/* Used in memblock.reserved regions, indicates that the memory region was reserved
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* by a call to memblock_alloc() */
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MEMBLOCK_ALLOC,
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/* Used in memblock.reserved regions, indicates that the memory region was reserved
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* by a call to memblock_reserve() */
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MEMBLOCK_RESERVED,
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} memblock_region_status_t;
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typedef struct memblock_region {
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/* the status of the memory region (free, reserved, allocated, etc) */
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memblock_region_status_t status;
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/* the address of the first byte that makes up the region */
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phys_addr_t base;
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/* the address of the last byte that makes up the region */
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phys_addr_t limit;
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} memblock_region_t;
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typedef struct memblock_type {
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struct memblock_region *regions;
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unsigned int count;
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unsigned int max;
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const char *name;
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} memblock_type_t;
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typedef struct memblock {
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struct memblock_type memory;
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struct memblock_type reserved;
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} memblock_t;
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typedef struct memblock_iter {
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memblock_index_t __idx;
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phys_addr_t it_base;
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phys_addr_t it_limit;
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memblock_region_status_t it_status;
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} memblock_iter_t;
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extern memblock_t memblock;
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extern int __next_mem_range(memblock_iter_t *it);
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extern int memblock_add(phys_addr_t base, size_t size);
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extern int memblock_reserve(phys_addr_t base, size_t size);
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extern phys_addr_t memblock_alloc(size_t size);
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extern int memblock_free(phys_addr_t addr, size_t size);
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extern void __next_memory_region(memblock_iter_t *it, \
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memblock_type_t *type_a, memblock_type_t *type_b,
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phys_addr_t start, phys_addr_t end);
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#endif
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