include/asm/assembler.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
5  *  Copyright (C) 1996-2000 Russell King
10  *  Do not include any C declarations in this file - it is included by
21 #include <asm/opcodes-virt.h>
22 #include <asm/asm-offsets.h>
25 #include <asm/uaccess-asm.h>
76  * set to write-allocate (this would need further testing on XScale when WA
127 	stmdb   sp!, {r0-r3, ip, lr}
131 	ldmia	sp!, {r0-r3, ip, lr}
143 	stmdb   sp!, {r0-r3, ip, lr}
147 	ldmia	sp!, {r0-r3, ip, lr}
265 	.pushsection ".alt.smp.init", "a"			;\
267 	.long	9998b - .					;\
269 	.if . - 9997b == 2					;\
272 	.if . - 9997b != 4					;\
277 	.pushsection ".alt.smp.init", "a"			;\
279 	.long	9998b - .					;\
280 	W(b)	. + (label - 9998b)					;\
289 	 * this_cpu_offset - load the per-CPU offset of this CPU into
309 	 * set_current - store the task pointer of this CPU's current task
328 	 * get_current - load the task pointer of this CPU's current task
347 	 * reload_current - reload the task pointer of this CPU's current task
374  * SMP data memory barrier
387 #error Incompatible SMP platform
398  * Raw SMP data memory barrier
410 	.error "Incompatible SMP platform"
416 	 * setmode is used to assert to be in svc mode during boot. For v7-M
457  * workaround for possibly broken pre-v6 hardware
458  * (akita, Sharp Zaurus C-1000, PXA270-based)
465  * STRT/LDRT access macros with ARM and Thumb-2 variants
542 	.size \name , . - \name
599 .La\@:	.long		\sym - .Lpc\@
605 	movw\c		\tmp, #:lower16:\sym - .Lpc\@
606 	movt\c		\tmp, #:upper16:\sym - .Lpc\@
619 	 * In Thumb-2 builds, the PC bias depends on whether we are currently
624 	.set		.Lpc\@, . + (. - .Lb\@)
633 	 * mov_l - move a constant value or [relocated] address into a register
645 	 * adr_l - adr pseudo-op with unlimited range
656 	 * ldr_l - ldr <literal> pseudo-op with unlimited range
667 	 * str_l - str <literal> pseudo-op with unlimited range
678 	.macro		__ldst_va, op, reg, tmp, sym, cond, offset
687 	 * of -/+ 256 MiB, which should be sufficient for the core kernel and
694 .L0_\@: sub\cond	\tmp, pc, #8 - \offset
695 .L1_\@: sub\cond	\tmp, \tmp, #4 - \offset
698 	\op\cond	\reg, [\tmp, #\offset]
702 	 * ldr_va - load a 32-bit word from the virtual address of \sym
704 	.macro		ldr_va, rd:req, sym:req, cond, tmp, offset=0
706 	__ldst_va	ldr, \rd, \tmp, \sym, \cond, \offset
708 	__ldst_va	ldr, \rd, \rd, \sym, \cond, \offset
713 	 * str_va - store a 32-bit word to the virtual address of \sym
720 	 * ldr_this_cpu_armv6 - Load a 32-bit word from the per-CPU variable 'sym',
737 	 * ldr_this_cpu - Load a 32-bit word from the per-CPU variable 'sym'
757 	 * rev_l - byte-swap a 32-bit value
780 	 * bl_r - branch and link to register