powerpc/kernel/misc_64.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * This file contains miscellaneous low-level functions.
4  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
21 #include <asm/asm-offsets.h>
27 #include <asm/feature-fixups.h>
47 	sync
53 	sync
58 	sync
62 	sync
68 	sync
73 	sync
86 	sync
88 	sync
94 	sync
100 	sync
106 	sync
117 	sync
119 	sync
125 	sync
131 	sync
137 	sync
148 	sync
150 	sync
155 	sync
163 	sync
165 	sync
170 	sync
193 	mtmsrd	r0,1
203 	sync
218 	mtmsrd	r4,1
227 	mtmsrd	r0,1
235 	sync
244 	mtmsrd	r5,1
260 1:	mflr	r5
261 	addi	r5,r5,kexec_flag-1b
271 	clrrdi	r11,r11,1	/* Clear MSR_LE */
294  * assumes that 1G is enough for kexec.
298 	 * Invalidate all non-IPROT TLB entries to avoid any TLB conflict.
302 	sync
307 	subi	r10,r10,1	/* Last entry: no conflict with kernel text */
308 	lis	r9,MAS0_TLBSEL(1)@h
353  * 0 and 1 (big endian) of the effective address in real mode
362 1:	li	r9,MSR_RI
369 	mtmsrd	r9,1
388 	/* switch stacks to newstack -- &kexec_stack.stack */
389 	stdu	r1,THREAD_SIZE-STACK_FRAME_MIN_SIZE(r3)
398 	std	r31,-8(r1)
399 	std	r30,-16(r1)
400 	std	r29,-24(r1)
401 	std	r28,-32(r1)
402 	std	r27,-40(r1)
403 	std	r26,-48(r1)
404 	std	r25,-56(r1)
406 	stdu	r1,-STACK_FRAME_MIN_SIZE-64(r1)
423 	mtmsrd	r3,1
430 	beq	1f
432 1:
439 	bne	1f
443 1:	li	r3,0
448 1:	/* assume normal blr return */
452 	li	r6,1
453 	stw	r6,kexec_flag-1b(5)
456 	beq	1f
484  *   and 0 will store phys into struct boot-block and load r3 from there,
485  *   copy kernel 0-0x100 and tell slaves to back down to 0x60 again
492 1:	mr	r3,r25	# my phys cpu
496 	blr	/* image->start(physid, image->start, 0); */