update project structures

[lunaix-os.git] / lunaix-os / kernel / mm / pmm.c

diff --git a/lunaix-os/kernel/mm/pmm.c b/lunaix-os/kernel/mm/pmm.c
index c6b0a25b7dd77cf39fa8f7fd8aa113b52c45a0c8..304d19dc47192f49606d546a777916bf90207034 100644 (file)
--- a/lunaix-os/kernel/mm/pmm.c
+++ b/lunaix-os/kernel/mm/pmm.c
@@ -17,6 +17,8 @@ uint8_t pm_bitmap[PM_BMP_MAX_SIZE];
 
 uintptr_t max_pg;
 
 
 uintptr_t max_pg;
 

+//  ... |xxxx xxxx |
+//  ... |-->|

 void
 pmm_mark_page_free(uintptr_t ppn)
 {
 void
 pmm_mark_page_free(uintptr_t ppn)
 {


@@ -77,7 +79,7 @@ size_t pg_lookup_ptr;
 void
 pmm_init(uintptr_t mem_upper_lim)
 {
 void
 pmm_init(uintptr_t mem_upper_lim)
 {

-    max_pg = (PG_ALIGN(mem_upper_lim) >> 12) + 1;
+    max_pg = (PG_ALIGN(mem_upper_lim) >> 12);

 
     pg_lookup_ptr = LOOKUP_START;
 
 
     pg_lookup_ptr = LOOKUP_START;
 


@@ -91,7 +93,7 @@ void*
 pmm_alloc_page()
 {
     // Next fit approach. Maximize the throughput!
 pmm_alloc_page()
 {
     // Next fit approach. Maximize the throughput!

-    uintptr_t good_page_found = NULL;
+    uintptr_t good_page_found = (uintptr_t)NULL;

     size_t old_pg_ptr = pg_lookup_ptr;
     size_t upper_lim = max_pg;
     uint8_t chunk = 0;
     size_t old_pg_ptr = pg_lookup_ptr;
     size_t upper_lim = max_pg;
     uint8_t chunk = 0;