Added a private tls.h file with definitions for the reserved TLS slots.

Renamed i386_set_kstack() to i386_set_tss_and_kstack(), because that's what
it does.
Added a new function arch_thread_init_tls() which must be called after
having allocated the TLS area.
Renamed arch_thread_initialize_kthread_stack() to arch_thread_init_kthread_stack()
to be more consistent.
Changed the parameters for arch_thread_enter_uspace() - it now gets a pointer
to the thread structure and takes the user stack pointer from there (which
might also be architectural different).


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2379 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/tls.h

@@ -0,0 +1,28 @@
+/* 
+** Copyright 2003, Axel Dörfler, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+#ifndef _KERNEL_TLS_H
+#define _KERNEL_TLS_H
+
+#include <support/TLS.h>
+
+
+#define TLS_SIZE (TLS_MAX_KEYS * sizeof(void *))
+
+enum {
+	TLS_BASE_ADDRESS_SLOT = 0,
+		// contains the address of the local storage space
+
+	TLS_THREAD_ID_SLOT,
+	TLS_ERRNO_SLOT,
+
+	// Note: these entries can safely be changed between
+	// releases; 3rd party code always calls tls_allocate()
+	// to get a free slot
+
+	TLS_FIRST_FREE_SLOT
+		// the first free slot for user allocations
+};
+
+#endif	/* _KERNEL_TLS_H */