Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * License.  See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 1994, 1995, 1996, 1998, 1999, 2002, 2003 Ralf Baechle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Copyright (C) 1994, 1995, 1996, by Andreas Busse
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Copyright (C) 1999 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * Copyright (C) 2000 MIPS Technologies, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *    written by Carsten Langgaard, carstenl@mips.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/asm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/cachectl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/mipsregs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/asm-offsets.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/regdef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/stackframe.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/asmmacro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  * task_struct *resume(task_struct *prev, task_struct *next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  *		       struct thread_info *next_ti)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	.align	5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	LEAF(resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	mfc0	t1, CP0_STATUS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	LONG_S	t1, THREAD_STATUS(a0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	cpu_save_nonscratch a0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	LONG_S	ra, THREAD_REG31(a0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	PTR_LA	t8, __stack_chk_guard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	LONG_L	t9, TASK_STACK_CANARY(a1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	LONG_S	t9, 0(t8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	 * The order of restoring the registers takes care of the race
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	 * updating $28, $29 and kernelsp without disabling ints.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	move	$28, a2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	cpu_restore_nonscratch a1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	PTR_ADDU	t0, $28, _THREAD_SIZE - 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	set_saved_sp	t0, t1, t2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	mfc0	t1, CP0_STATUS		/* Do we really need this? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	li	a3, 0xff01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	and	t1, a3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	LONG_L	a2, THREAD_STATUS(a1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	nor	a3, $0, a3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	and	a2, a3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	or	a2, t1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	mtc0	a2, CP0_STATUS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	move	v0, a0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	jr	ra
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	END(resume)