Changeset 2057572 in mainline for uspace/libc/arch

Timestamp:

2007-03-27T23:40:25Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

399ece9

Parents:

8d37a06

Message:

The Ultimate Solution To Illegal Virtual Aliases.
It is better to avoid them completely than to fight them.
Switch the sparc64 port to 16K pages. The TLBs and TSBs
continue to operate with 8K pages only. Page tables and
other generic parts operate with 16K pages.

Because the MMU doesn't support 16K directly, each 16K
page is emulated by a pair of 8K pages. With 16K pages,
illegal aliases cannot be created in 16K D-cache.

Location:

uspace/libc/arch/sparc64

Files:

• _link.ld.in (modified) (3 diffs)
• include/config.h (modified) (1 diff)
• include/stack.h (modified) (1 diff)

uspace/libc/arch/sparc64/_link.ld.in

@@ -8 +8 @@
 
 SECTIONS {
-        . = 0x2000;
+        . = 0x4000;
 
-        .init ALIGN(0x2000) : SUBALIGN(0x2000) {
+        .init ALIGN(0x4000) : SUBALIGN(0x4000) {
                 *(.init);
         } :text
@@ -18 +18 @@
         } :text
         
-        .got ALIGN(0x2000) : SUBALIGN(0x2000) {
+        .got ALIGN(0x4000) : SUBALIGN(0x4000) {
                  _gp = .;
                  *(.got*);
         } :data
-        .data ALIGN(0x2000) : SUBALIGN(0x2000) {
+        .data ALIGN(0x4000) : SUBALIGN(0x4000) {
                 *(.data);
                 *(.sdata);
@@ -42 +42 @@
         } :data
 
-        . = ALIGN(0x2000);
+        . = ALIGN(0x4000);
         _heap = .;
         

uspace/libc/arch/sparc64/include/config.h

@@ -36 +36 @@
 #define LIBC_sparc64_CONFIG_H_
 
-#define PAGE_WIDTH      13
-#define PAGE_SIZE       (1<<PAGE_WIDTH)
-#define PAGE_COLOR_BITS 1               /**< Bit 13 is the page color. */
+#define PAGE_WIDTH      14
+#define PAGE_SIZE       (1 << PAGE_WIDTH)
+#define PAGE_COLOR_BITS 0               /**< Only one page color. */
 
 #endif

uspace/libc/arch/sparc64/include/stack.h

@@ -44 +44 @@
  * 16-extended-word save area for %i[0-7] and %l[0-7] registers.
  */
-#define STACK_WINDOW_SAVE_AREA_SIZE     (16*STACK_ITEM_SIZE)
+#define STACK_WINDOW_SAVE_AREA_SIZE     (16 * STACK_ITEM_SIZE)
 
 /**