Changeset cfa70add in mainline for kernel/arch/sparc64/src/asm.S

Timestamp:

2006-09-03T23:37:14Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

fd85ae5

Parents:

002e613

Message:

sparc64 update.

• Prototype userspace layer implementation that at least relates to sparc64 and compiles cleanly.
• Fixes for kernel's preemptible_handler and code related to running userspace.
• Enable userspace. Several dozen instructions are now run in userspace! We are pretty near the userspace milestone for sparc64.

File:

• kernel/arch/sparc64/src/asm.S (modified) (3 diffs)

kernel/arch/sparc64/src/asm.S

@@ -151 +151 @@
  * %o0  Userspace entry address.
  * %o1  Userspace stack pointer address.
+ * %o2  Userspace address of uarg structure.
  */
 .global switch_to_userspace
@@ -157 +158 @@
         wrpr %g0, 0, %cleanwin          ! avoid information leak
         save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
+
+        mov %i3, %o0                    ! uarg
 
         clr %i2
@@ -179 +182 @@
         stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi
         flush %i7
+
+        /*
+         * Spills and fills will be handled by the userspace handlers.
+         */
+        wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(1), %wstate
         
         done                            ! jump to userspace