Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * "Indirect" DCR access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (c) 2004 Eugene Surovegin <ebs@ebshome.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <asm/ppc_asm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define DCR_ACCESS_PROLOG(table) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	cmplwi	cr0,r3,1024;	 \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	rlwinm  r3,r3,4,18,27;   \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	lis     r5,table@h;      \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	ori     r5,r5,table@l;   \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	add     r3,r3,r5;        \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	bge-	1f;		 \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	mtctr   r3;              \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	bctr;			 \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 1:	trap;			 \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0;	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	blr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) _GLOBAL(__mfdcr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	DCR_ACCESS_PROLOG(__mfdcr_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) EXPORT_SYMBOL(__mfdcr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) _GLOBAL(__mtdcr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	DCR_ACCESS_PROLOG(__mtdcr_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) EXPORT_SYMBOL(__mtdcr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) __mfdcr_table:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	mfdcr  r3,0; blr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) __mtdcr_table:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	mtdcr  0,r4; blr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) dcr     = 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)         .rept   1023
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	mfdcr   r3,dcr; blr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	mtdcr   dcr,r4; blr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	dcr     = dcr + 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	.endr