[Lost] [Patch] kernel2: Syscall pm_sleep

["Kevin Wolf" <kevin@xxxxxxxxxx>]

+ kernel2: Syscall pm_sleep

Index: trunk/src/kernel2/include/syscall.h
===================================================================
--- trunk.orig/src/kernel2/include/syscall.h
+++ trunk/src/kernel2/include/syscall.h
@@ -96,6 +96,9 @@ int syscall_pm_p(void);
 /// Kritischen Abschnitt verlassen
 int syscall_pm_v(pid_t pid);
 
+/// Die Kontrolle an einen anderen Task abgeben
+void syscall_pm_sleep(void);
+
 /// Prozess erstellen
 pid_t syscall_pm_create_process(vaddr_t start, uid_t uid,
     const char* cmdline, pid_t parent_pid);
Index: trunk/src/kernel2/src/syscall.c
===================================================================
--- trunk.orig/src/kernel2/src/syscall.c
+++ trunk/src/kernel2/src/syscall.c
@@ -57,6 +57,8 @@ void syscall_init()
     syscall_register(SYSCALL_PM_GET_CMDLINE, (void*) syscall_pm_get_cmdline,
         0);
 
+    syscall_register(SYSCALL_PM_SLEEP, &syscall_pm_sleep, 0);
+
     syscall_register(SYSCALL_PM_P, (void*) &syscall_pm_p, 0);
     syscall_register(SYSCALL_PM_V, (void*) &syscall_pm_v, 1);
 
Index: trunk/src/kernel2/src/syscalls/pm.c
===================================================================
--- trunk.orig/src/kernel2/src/syscalls/pm.c
+++ trunk/src/kernel2/src/syscalls/pm.c
@@ -167,3 +167,24 @@ void syscall_init_child_page(pid_t pid, 
     // Speicherbereich aus dem Adressraum des Quellprozesses entfernen
     mmc_unmap(&mmc_current_context(), src, NUM_PAGES(size));
 }
+
+/**
+ * Die Kontrolle an einen anderen Task abgeben
+ *
+ * FIXME Diesen Code gibt es in genau dieser Form auch in im.c
+ */
+void syscall_pm_sleep(void)
+{
+    pm_thread_t* thread = cpu_get_current()->thread;
+
+    // Den aktuellen Thread an den Scheduler zurueckgeben
+    pm_scheduler_push(thread);
+
+    // Einen neuen Thread holen.
+    thread = pm_scheduler_pop();
+
+    cpu_get_current()->tss.esp0 = (uintptr_t) thread->kernel_stack + sizeof(interrupt_stack_frame_t);
+    cpu_get_current()->tss.ss0 = 2 << 3;
+
+    cpu_get_current()->thread = thread;
+}