Changeset d364e94 in mainline for kernel/arch/sparc64/src/proc/thread.c

Timestamp:

2008-10-02T20:24:01Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

1d132ae

Parents:

c2ad500

Message:

Do not allocate full page for the uspace window buffer.
Instead, allocate only the bare minimum to fit NWINDOWS - 1
uspace windows and to satisfy alignment requirements.

File:

• kernel/arch/sparc64/src/proc/thread.c (modified) (4 diffs)

kernel/arch/sparc64/src/proc/thread.c

@@ -35 +35 @@
 #include <proc/thread.h>
 #include <arch/proc/thread.h>
-#include <mm/frame.h>
-#include <mm/page.h>
-#include <arch/mm/page.h>
+#include <mm/slab.h>
+#include <arch/trap/regwin.h>
 #include <align.h>
 
@@ -51 +50 @@
 {
         if (t->arch.uspace_window_buffer) {
+                uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer;
                 /*
                  * Mind the possible alignment of the userspace window buffer
                  * belonging to a killed thread.
                  */
-                frame_free(KA2PA(ALIGN_DOWN((uintptr_t)
-                    t->arch.uspace_window_buffer, PAGE_SIZE)));
+                free((uint8_t *) ALIGN_DOWN(uw_buf, UWB_ALIGNMENT));
         }
 }
@@ -68 +67 @@
                  * returned from the slab allocator doesn't have any.
                  */
-                t->arch.uspace_window_buffer = frame_alloc(ONE_FRAME, FRAME_KA);
+                t->arch.uspace_window_buffer = malloc(UWB_ASIZE, 0);
         } else {
                 uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer;
@@ -77 +76 @@
                  */
                 t->arch.uspace_window_buffer = (uint8_t *) ALIGN_DOWN(uw_buf,
-                    PAGE_SIZE);
+                    UWB_ASIZE);
         }
 }