turn default stack size into a constant

PauloMigAlmeida · Dec 18, 2021 · 6ff0623 · 6ff0623
1 parent 1670c3b
commit 6ff0623
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Showing 2 changed files with 2 additions and 1 deletion.
diff --git a/include/kernel/mm/init.h b/include/kernel/mm/init.h
@@ -13,6 +13,7 @@
 #define ELF_TEXT_OFFSET         0x1000
 #define PAGE_SIZE               0x1000
 #define PAGEFRAME_SIZE          0x1000
+#define STACK_SIZE              PAGE_SIZE * 2
 
 /* Virtual Memory Mapping -> More at: /include/boot/global/mem.asm */
 #define K_VIRT_START_ADDR           0xffff800000000000

diff --git a/src/kernel/mm/init.c b/src/kernel/mm/init.c
@@ -29,7 +29,7 @@ static void print_mem_alloc(char *desc, mem_map_region_t *region) {
 static void reserve_kernel_sections(void) {
     /* reserve memory area to hold kernel stack which is going to be 2x 4Kb PAGES (same as Linux) */
     mem_map_region_t kern_stack = mem_alloc_region(
-            pa((uint64_t) &kernel_virt_start_addr) - ELF_TEXT_OFFSET - PAGE_SIZE * 2,
+            pa((uint64_t) &kernel_virt_start_addr) - ELF_TEXT_OFFSET - STACK_SIZE,
             round_up_po2(pa((uint64_t) &kernel_virt_start_addr) - ELF_TEXT_OFFSET, PAGE_SIZE));
     print_mem_alloc("K_STACK", &kern_stack);