From 6a56675851c16a0cefcf5a2d10a1227c37e9d886 Mon Sep 17 00:00:00 2001 From: Alex Auvolat Date: Tue, 2 Dec 2014 20:12:42 +0100 Subject: Implement kernel memory region allocator. --- kernel/include/region.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 kernel/include/region.h (limited to 'kernel/include') 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 +#include + +// 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(); -- cgit v1.2.3