Factorize region allocator between kernel and user processes (same code was there twice)

1 files changed, 32 insertions, 0 deletions

diff --git a/src/common/include/region_alloc.h b/src/common/include/region_alloc.h
new file mode 100644
index 0000000..d314bd5
--- /dev/null
+++ b/src/common/include/region_alloc.h
@@ -0,0 +1,32 @@
+#pragma once
+
+// Virtual memory region allocator
+
+// This is entirely thread-safe
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+struct region_info;
+
+typedef bool (*map_page_fun_t)(void* addr);	// map a single page (used by region allocator)
+
+typedef struct region_info {
+	void* addr;
+	size_t size;
+	char* type;
+} region_info_t;
+
+// rsvd_end : when used for kernel memory region management, a reserved region
+// exists between begin (=K_HIGHHALF_ADDR) and the end of kernel static data
+// for user processes, use rsvd_end = begin (no reserved region)
+void region_allocator_init(void* begin, void* rsvd_end, void* end, map_page_fun_t map);
+
+void* region_alloc(size_t size, char* type);	// returns 0 on error
+region_info_t *find_region(void* addr);
+void region_free(void* addr);
+
+void dbg_print_region_info();
+
+/* vim: set ts=4 sw=4 tw=0 noet :*/