1 files changed, 38 insertions, 0 deletions
diff --git a/src/kernel/include/region.h b/src/kernel/include/region.h
new file mode 100644
index 0000000..1fef582
--- /dev/null
+++ b/src/kernel/include/region.h
@@ -0,0 +1,38 @@
+#pragma once
+
+// Kernel virtual memory region allocator
+
+// This is entirely thread-safe
+
+#include <sys.h>
+#include <paging.h>
+
+struct region_info;
+typedef void (*page_fault_handler_t)(pagedir_t *pd, struct region_info *r, void* addr);
+
+typedef struct region_info {
+	void* addr;
+	size_t size;
+	char* type;
+	page_fault_handler_t pf;
+} region_info_t;
+
+void region_allocator_init(void* kernel_data_end);
+
+void* region_alloc(size_t size, char* type, page_fault_handler_t pf);	// returns 0 on error
+region_info_t *find_region(void* addr);
+void region_free(void* addr);
+
+// some usefull PF handlers
+// default_allocator_pf_handler : just allocates new frames on page faults
+void default_allocator_pf_handler(pagedir_t *pd, struct region_info *r, void* addr);
+
+// some functions for freeing regions and frames
+// region_free_unmap_free : deletes a region and frees all frames that were mapped in it
+void region_free_unmap_free(void* addr);
+// region_free_unmap : deletes a region and unmaps all frames that were mapped in it, without freeing them
+void region_free_unmap(void* addr);
+
+void dbg_print_region_info();
+
+/* vim: set ts=4 sw=4 tw=0 noet :*/