Changeset ed7e057 in mainline for kernel/generic/src/main/main.c

Timestamp:

2024-01-16T15:46:47Z (17 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master

Children:

29029ac0, a5b5f17

Parents:

4ed7870

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2024-01-15 20:09:30)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2024-01-16 15:46:47)

Message:

Add functions context_create(), context_replace() and context_swap()

and use them where appropriate, removing context_save() in the process.
Much like in userspace, context_swap() maintains natural control flow
as opposed to context_save()'s return-twice mechanic.

Beyond that, in the future, context_replace() and context_swap()
can be implemented more efficiently than the context_save()/
context_restore() pair. As of now, the original implementation is
retained.

File:

• kernel/generic/src/main/main.c (modified) (3 diffs)

kernel/generic/src/main/main.c

@@ -80 +80 @@
 #include <arch/arch.h>
 #include <arch.h>
-#include <arch/faddr.h>
 #include <ipc/ipc.h>
 #include <macros.h>
@@ -174 +173 @@
             ALIGN_UP((uintptr_t) kdata_end - config.base, PAGE_SIZE);
 
-        context_save(&ctx);
-        context_set(&ctx, FADDR(main_bsp_separated_stack),
+        context_create(&ctx, main_bsp_separated_stack,
             bootstrap_stack, bootstrap_stack_size);
         context_restore(&ctx);
@@ -336 +334 @@
          * switch to this cpu's private stack prior to waking kmp up.
          */
-        context_t ctx;
-        context_save(&ctx);
-        context_set(&ctx, FADDR(main_ap_separated_stack),
-            (uintptr_t) CPU_LOCAL->stack, STACK_SIZE);
-        context_restore(&ctx);
+        context_replace(main_ap_separated_stack, CPU_LOCAL->stack, STACK_SIZE);
         /* not reached */
 }