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