Refactor PF handlers and region freeing functions.

1 files changed, 15 insertions, 2 deletions

diff --git a/kernel/include/region.h b/kernel/include/region.h
index bc26bfe..4bc8917 100644
--- a/kernel/include/region.h
+++ b/kernel/include/region.h
@@ -8,9 +8,10 @@
 // Region types
 #define REGION_T_KERNEL_BASE	0x00000001		// base kernel code & data
 #define REGION_T_DESCRIPTORS	0x00000002		// contains more region descriptors
-#define REGION_T_PAGETABLE		0x00000010		// used to map a page table/page directory
 #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_KPROC_HEAP		0x00000200		// used for a kernel process' heap
+#define REGION_T_KPROC_STACK	0x00000400		// used for a kernel process' heap
+#define REGION_T_PROC_KSTACK	0x00000800		// used for a process' kernel heap
 #define REGION_T_CACHE			0x00001000		// used for cache
 #define REGION_T_HW				0x00002000		// used for hardware access
 
@@ -30,4 +31,16 @@ void* region_alloc(size_t size, uint32_t type, page_fault_handler_t pf);	// retu
 region_info_t *find_region(void* addr);
 void region_free(void* addr);
 
+// some usefull PF handlers
+// stack_pf_handler : allocates new frames and panics on access to first page of region (stack overflow)
+void stack_pf_handler(pagedir_t *pd, struct region_info *r, void* addr);
+// 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_stats();