basic arena allocator implementation

include/util/arena_alloc.nasm

@@ -68,6 +68,7 @@ arena_alloc:
 .func:
     ; remove bytes from pool and increment mark to the new cursor location
     ; return a pointer to the begining of  allocated segment
+    ERROR STEVIA_DEBUG_UNIMPLEMENTED
 .endp:
     __CDECL16_EXIT
     ret
@@ -76,6 +77,7 @@ arena_mark:
     __CDECL16_ENTRY
 .func:
     ; return the current location of the 'cursor' in the allocator
+    ERROR STEVIA_DEBUG_UNIMPLEMENTED
 .endp:
     __CDECL16_EXIT
     ret
@@ -84,6 +86,7 @@ arena_reset_to:
     __CDECL16_ENTRY
 .func:
     ; rewind the arena to a previously marked point
+    ERROR STEVIA_DEBUG_UNIMPLEMENTED
 .endp:
     __CDECL16_EXIT
     ret
@@ -92,6 +95,7 @@ arena_reset:
     __CDECL16_ENTRY
 .func:
     ; reset the entire heap to a fresh state
+    ERROR STEVIA_DEBUG_UNIMPLEMENTED
 .endp:
     __CDECL16_EXIT
     ret

src/stage2/stage2.nasm

@@ -88,7 +88,7 @@ init:
     jmp word __STAGE2_SEGMENT:main
 
 ; ###############
-; Functions
+; Core Functions
 ; ###############
 
 %include "util/kmem_func.nasm"
@@ -96,6 +96,11 @@ init:
 %include "util/kmemset4_func.nasm"
 %include "util/error_func.nasm"
 
+; ###############
+; Functions
+; ###############
+%include "util/arena_alloc.nasm"
+
 ; ###############
 ; FAT32 Driver
 ; ###############
@@ -152,6 +157,10 @@ main:
     call disable_cursor_bios
     print_string HelloPrompt_info
     
+    ; setup the early heap
+    push area
+    call arena_init
+
     ; enable A20 gate
     call EnableA20
     print_string A20_Enabled_OK_info
@@ -413,6 +422,10 @@ fat32_state:
 align 16, resb 1
 SteviaInfo:
     resd 4
+
+align 16, resb 1
+early_heap_state:
+    resb ArenaStateStruc_t_size
 ;
 ; post-bss init globals
 ;