Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * Miscellaneous low-level MMU functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2008-2009 PetaLogix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 2007 Xilinx, Inc.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Derived from arch/ppc/kernel/misc.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * This file is subject to the terms and conditions of the GNU General
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * Public License. See the file COPYING in the main directory of this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * archive for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/sys.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/mmu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	.text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  * Flush MMU TLB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  * We avoid flushing the pinned 0, 1 and possibly 2 entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .globl _tlbia;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .type  _tlbia, @function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .align 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) _tlbia:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	lwi	r12, r0, tlb_skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	/* isync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) _tlbia_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	mts	rtlbx, r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	mts	rtlbhi, r0 /* flush: ensure V is clear */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	rsubi	r11, r12, MICROBLAZE_TLB_SIZE - 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	bneid	r11, _tlbia_1 /* loop for all entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	addik	r12, r12, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	mbar	1 /* sync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	rtsd	r15, 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	.size  _tlbia, . - _tlbia
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  * Flush MMU TLB for a particular address (in r5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .globl _tlbie;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .type  _tlbie, @function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .align 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) _tlbie:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	mts	rtlbsx, r5 /* look up the address in TLB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	mfs	r12, rtlbx /* Retrieve index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	blti	r12, _tlbie_1 /* Check if found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	mts	rtlbhi, r0 /* flush: ensure V is clear */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	mbar	1 /* sync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) _tlbie_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	rtsd	r15, 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	.size  _tlbie, . - _tlbie