| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859 |
- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1994, 1995, 1996, 1998, 1999, 2002, 2003 Ralf Baechle
- * Copyright (C) 1996 David S. Miller ([email protected])
- * Copyright (C) 1994, 1995, 1996, by Andreas Busse
- * Copyright (C) 1999 Silicon Graphics, Inc.
- * Copyright (C) 2000 MIPS Technologies, Inc.
- * written by Carsten Langgaard, [email protected]
- */
- #include <asm/asm.h>
- #include <asm/cachectl.h>
- #include <asm/mipsregs.h>
- #include <asm/asm-offsets.h>
- #include <asm/regdef.h>
- #include <asm/stackframe.h>
- #include <asm/thread_info.h>
- #include <asm/asmmacro.h>
- /*
- * task_struct *resume(task_struct *prev, task_struct *next,
- * struct thread_info *next_ti)
- */
- .align 5
- LEAF(resume)
- mfc0 t1, CP0_STATUS
- LONG_S t1, THREAD_STATUS(a0)
- cpu_save_nonscratch a0
- LONG_S ra, THREAD_REG31(a0)
- #if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP)
- PTR_LA t8, __stack_chk_guard
- LONG_L t9, TASK_STACK_CANARY(a1)
- LONG_S t9, 0(t8)
- #endif
- /*
- * The order of restoring the registers takes care of the race
- * updating $28, $29 and kernelsp without disabling ints.
- */
- move $28, a2
- cpu_restore_nonscratch a1
- PTR_ADDU t0, $28, _THREAD_SIZE - 32
- set_saved_sp t0, t1, t2
- mfc0 t1, CP0_STATUS /* Do we really need this? */
- li a3, 0xff01
- and t1, a3
- LONG_L a2, THREAD_STATUS(a1)
- nor a3, $0, a3
- and a2, a3
- or a2, t1
- mtc0 a2, CP0_STATUS
- move v0, a0
- jr ra
- END(resume)
|
