/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
#include <i386/asm.h>
#include <i386/proc_reg.h>
+#include <i386/mp.h>
#include <assym.s>
-#ifdef SYMMETRY
-#include <sqt/asm_macros.h>
-#endif
-
-#if AT386
-#include <i386/mp.h>
-#endif /* AT386 */
#define CX(addr, reg) addr(,reg,4)
+ .text
/*
* Context switch routines for i386.
*/
Entry(Load_context)
movl S_ARG0,%ecx /* get thread */
movl TH_KERNEL_STACK(%ecx),%ecx /* get kernel stack */
- lea KERNEL_STACK_SIZE-IKS_SIZE-IEL_SIZE(%ecx),%edx
- /* point to stack top */
+ lea -IKS_SIZE(%ecx),%edx
+ add EXT(kernel_stack_size),%edx /* point to stack top */
movl %ecx,%gs:CPU_ACTIVE_STACK /* store stack address */
movl %edx,%gs:CPU_KERNEL_STACK /* store stack top */
movl %edx,%esp
movl %edx,%ebp
+ subl $12, %esp /* align stack */
xorl %eax,%eax /* return zero (no old thread) */
pushl %eax
call EXT(thread_continue)
/*
- * This really only has to save registers
+ * This has to save registers only
* when there is no explicit continuation.
*/
Entry(Switch_context)
- movl %gs:CPU_ACTIVE_STACK,%ecx /* get old kernel stack */
+ popl %eax /* pop return PC */
+ /* Test for a continuation and skip all state saving if so... */
+ cmpl $0,4(%esp)
+ jne 5f
+ movl %gs:CPU_KERNEL_STACK,%ecx /* get old kernel stack top */
movl %ebx,KSS_EBX(%ecx) /* save registers */
movl %ebp,KSS_EBP(%ecx)
movl %edi,KSS_EDI(%ecx)
movl %esi,KSS_ESI(%ecx)
- popl KSS_EIP(%ecx) /* save return PC */
+ movl %eax,KSS_EIP(%ecx) /* save return PC */
movl %esp,KSS_ESP(%ecx) /* save SP */
-
+5:
movl 0(%esp),%eax /* return old thread */
- movl 8(%esp),%ebx /* get new thread */
- movl %ebx,%gs:CPU_ACTIVE_THREAD /* new thread is active */
- movl TH_KERNEL_STACK(%ebx),%ecx /* get its kernel stack */
- lea KERNEL_STACK_SIZE-IKS_SIZE-IEL_SIZE(%ecx),%ebx
+ movl 8(%esp),%ecx /* get new thread */
+ movl %ecx,%gs:CPU_ACTIVE_THREAD /* new thread is active */
+ movl TH_KERNEL_STACK(%ecx),%ebx /* get its kernel stack */
+ lea -IKS_SIZE(%ebx),%ecx
+ add EXT(kernel_stack_size),%ecx
/* point to stack top */
- movl %ecx,%gs:CPU_ACTIVE_STACK /* set current stack */
- movl %ebx,%gs:CPU_KERNEL_STACK /* set stack top */
-
-
- movl $0,%gs:CPU_ACTIVE_KLOADED
+ movl %ebx,%gs:CPU_ACTIVE_STACK /* set current stack */
+ movl %ecx,%gs:CPU_KERNEL_STACK /* set stack top */
+
movl KSS_ESP(%ecx),%esp /* switch stacks */
movl KSS_ESI(%ecx),%esi /* restore registers */
movl KSS_EDI(%ecx),%edi
jmp *KSS_EIP(%ecx) /* return old thread */
Entry(Thread_continue)
+ subl $12, %esp /* align stack */
pushl %eax /* push the thread argument */
xorl %ebp,%ebp /* zero frame pointer */
call *%ebx /* call real continuation */
/*
- * void machine_processor_shutdown(thread_t thread,
- * void (*routine)(processor_t),
- * processor_t processor)
+ * thread_t Shutdown_context(thread_t thread,
+ * void (*routine)(processor_t),
+ * processor_t processor)
*
* saves the kernel context of the thread,
* switches to the interrupt stack,
* continues the thread (with thread_continue),
* then runs routine on the interrupt stack.
*
- * Assumes that the thread is a kernel thread (thus
- * has no FPU state)
*/
-Entry(machine_processor_shutdown)
- movl %gs:CPU_ACTIVE_STACK,%ecx /* get old kernel stack */
+Entry(Shutdown_context)
+ movl %gs:CPU_KERNEL_STACK,%ecx /* get old kernel stack */
movl %ebx,KSS_EBX(%ecx) /* save registers */
movl %ebp,KSS_EBP(%ecx)
movl %edi,KSS_EDI(%ecx)
popl KSS_EIP(%ecx) /* save return PC */
movl %esp,KSS_ESP(%ecx) /* save SP */
+ movl %gs:CPU_ACTIVE_STACK,%ecx /* get old stack */
movl 0(%esp),%eax /* get old thread */
movl %ecx,TH_KERNEL_STACK(%eax) /* save old stack */
movl 4(%esp),%ebx /* get routine to run next */
movl %gs:CPU_INT_STACK_TOP,%esp /* switch to interrupt stack */
+ subl $12, %esp /* align stack */
pushl %esi /* push argument */
call *%ebx /* call routine to run */
hlt /* (should never return) */
-
-
- .text
-
- .globl EXT(locore_end)
-LEXT(locore_end)
-
projects / apple / xnu.git / blobdiff