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author | Alex Auvolat <alex.auvolat@ens.fr> | 2014-12-02 20:12:42 +0100 |
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committer | Alex Auvolat <alex.auvolat@ens.fr> | 2014-12-02 20:12:42 +0100 |
commit | 6a56675851c16a0cefcf5a2d10a1227c37e9d886 (patch) | |
tree | aebd4784159999993e3ae9f1e7c15961f267cad6 /kernel/include | |
parent | 456fc99e8feac598f7c6f1a3aaa82bf994404e39 (diff) | |
download | macroscope-6a56675851c16a0cefcf5a2d10a1227c37e9d886.tar.gz macroscope-6a56675851c16a0cefcf5a2d10a1227c37e9d886.zip |
Implement kernel memory region allocator.
Diffstat (limited to 'kernel/include')
-rw-r--r-- | kernel/include/region.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/include/region.h b/kernel/include/region.h new file mode 100644 index 0000000..701e2d9 --- /dev/null +++ b/kernel/include/region.h @@ -0,0 +1,33 @@ +#pragma once + +// Kernel virtual memory region allocator + +#include <sys.h> +#include <paging.h> + +// Region types +#define REGION_T_KERNEL_BASE 0x00000001 // base kernel code & data +#define REGION_T_DESCRIPTORS 0x00000002 // contains more region descriptors +#define REGION_T_PAGEDIR 0x00000010 // used to map a page directory +#define REGION_T_PAGETABLE 0x00000020 // used to map a page table +#define REGION_T_CORE_HEAP 0x00000100 // used for the core kernel heap +#define REGION_T_PROC_HEAP 0x00000200 // used for a kernel process' heap +#define REGION_T_CACHE 0x00001000 // used for cache +#define REGION_T_HW 0x00002000 // used for hardware access + +struct region_info; +typedef void (*page_fault_handler_t)(pagedir_t *pd, struct region_info *r, size_t addr); + +typedef struct region_info { + size_t addr, size; + uint32_t type; + page_fault_handler_t pf; +} region_info_t; + +void region_allocator_init(void* kernel_data_end); + +size_t region_alloc(size_t size, uint32_t type, page_fault_handler_t pf); // returns 0 on error +region_info_t *find_region(size_t addr); +void region_free(size_t addr); + +void dbg_print_region_stats(); |