FM / asm

/usr/src/linux-headers-5.15.0-190/arch/arc/include/asm/

/usr/src/linux-headers-5.15.0-190/arch/arc/include/asm

Name	Size	Mode	Actions
arcregs.h	9477	0644	edit dl rm
asm-offsets.h	165	0644	edit dl rm
asserts.h	958	0644	edit dl rm
atomic-llsc.h	2864	0644	edit dl rm
atomic-spinlock.h	2569	0644	edit dl rm
atomic.h	1153	0644	edit dl rm
atomic64-arcv2.h	6095	0644	edit dl rm
barrier.h	1376	0644	edit dl rm
bitops.h	3885	0644	edit dl rm
bug.h	819	0644	edit dl rm
cache.h	3604	0644	edit dl rm
cacheflush.h	3824	0644	edit dl rm
checksum.h	2371	0644	edit dl rm
cmpxchg.h	3188	0644	edit dl rm
current.h	549	0644	edit dl rm
delay.h	1896	0644	edit dl rm
disasm.h	3813	0644	edit dl rm
dma.h	313	0644	edit dl rm
dsp-impl.h	3860	0644	edit dl rm
dsp.h	796	0644	edit dl rm
dwarf.h	746	0644	edit dl rm
elf.h	1935	0644	edit dl rm
entry-arcv2.h	7419	0644	edit dl rm
entry-compact.h	8810	0644	edit dl rm
entry.h	6687	0644	edit dl rm
exec.h	264	0644	edit dl rm
fb.h	411	0644	edit dl rm
fpu.h	1125	0644	edit dl rm
futex.h	3611	0644	edit dl rm
highmem.h	1422	0644	edit dl rm
hugepage.h	2071	0644	edit dl rm
io.h	6291	0644	edit dl rm
irq.h	679	0644	edit dl rm
irqflags-arcv2.h	3491	0644	edit dl rm
irqflags-compact.h	4293	0644	edit dl rm
irqflags.h	363	0644	edit dl rm
jump_label.h	1976	0644	edit dl rm
Kbuild	153	0644	edit dl rm
kdebug.h	254	0644	edit dl rm
kgdb.h	1239	0644	edit dl rm
kprobes.h	1186	0644	edit dl rm
linkage.h	1484	0644	edit dl rm
mach_desc.h	1943	0644	edit dl rm
mmu-arcv2.h	2494	0644	edit dl rm
mmu.h	387	0644	edit dl rm
mmu_context.h	5568	0644	edit dl rm
module.h	428	0644	edit dl rm
page.h	3313	0644	edit dl rm
pci.h	360	0644	edit dl rm
perf_event.h	6879	0644	edit dl rm
pgalloc.h	2888	0644	edit dl rm
pgtable-bits-arcv2.h	4896	0644	edit dl rm
pgtable-levels.h	5626	0644	edit dl rm
pgtable.h	780	0644	edit dl rm
processor.h	3253	0644	edit dl rm
ptrace.h	3759	0644	edit dl rm
sections.h	261	0644	edit dl rm
segment.h	476	0644	edit dl rm
serial.h	498	0644	edit dl rm
setup.h	1274	0644	edit dl rm
shmparam.h	296	0644	edit dl rm
smp.h	3823	0644	edit dl rm
spinlock.h	8580	0644	edit dl rm
spinlock_types.h	905	0644	edit dl rm
stacktrace.h	1178	0644	edit dl rm
string.h	1036	0644	edit dl rm
switch_to.h	553	0644	edit dl rm
syscall.h	1738	0644	edit dl rm
syscalls.h	547	0644	edit dl rm
thread_info.h	3339	0644	edit dl rm
timex.h	362	0644	edit dl rm
tlb.h	262	0644	edit dl rm
tlbflush.h	1654	0644	edit dl rm
uaccess.h	17019	0644	edit dl rm
unaligned.h	625	0644	edit dl rm
unwind.h	3446	0644	edit dl rm
vermagic.h	157	0644	edit dl rm
vmalloc.h	87	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/arch/arc/include/asm/entry.h (6687B)

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 */

#ifndef __ASM_ARC_ENTRY_H
#define __ASM_ARC_ENTRY_H

#include <asm/unistd.h>		/* For NR_syscalls defination */
#include <asm/arcregs.h>
#include <asm/ptrace.h>
#include <asm/processor.h>	/* For VMALLOC_START */
#include <asm/mmu.h>

#ifdef CONFIG_ISA_ARCOMPACT
#include <asm/entry-compact.h>	/* ISA specific bits */
#else
#include <asm/entry-arcv2.h>
#endif

/* Note on the LD/ST addr modes with addr reg wback
 *
 * LD.a same as LD.aw
 *
 * LD.a    reg1, [reg2, x]  => Pre Incr
 *      Eff Addr for load = [reg2 + x]
 *
 * LD.ab   reg1, [reg2, x]  => Post Incr
 *      Eff Addr for load = [reg2]
 */

.macro PUSH reg
	st.a	\reg, [sp, -4]
.endm

.macro PUSHAX aux
	lr	r9, [\aux]
	PUSH	r9
.endm

.macro POP reg
	ld.ab	\reg, [sp, 4]
.endm

.macro POPAX aux
	POP	r9
	sr	r9, [\aux]
.endm

/*--------------------------------------------------------------
 * Helpers to save/restore Scratch Regs:
 * used by Interrupt/Exception Prologue/Epilogue
 *-------------------------------------------------------------*/
.macro  SAVE_R0_TO_R12
	PUSH	r0
	PUSH	r1
	PUSH	r2
	PUSH	r3
	PUSH	r4
	PUSH	r5
	PUSH	r6
	PUSH	r7
	PUSH	r8
	PUSH	r9
	PUSH	r10
	PUSH	r11
	PUSH	r12
.endm

.macro RESTORE_R12_TO_R0
	POP	r12
	POP	r11
	POP	r10
	POP	r9
	POP	r8
	POP	r7
	POP	r6
	POP	r5
	POP	r4
	POP	r3
	POP	r2
	POP	r1
	POP	r0

.endm

/*--------------------------------------------------------------
 * Helpers to save/restore callee-saved regs:
 * used by several macros below
 *-------------------------------------------------------------*/
.macro SAVE_R13_TO_R24
	PUSH	r13
	PUSH	r14
	PUSH	r15
	PUSH	r16
	PUSH	r17
	PUSH	r18
	PUSH	r19
	PUSH	r20
	PUSH	r21
	PUSH	r22
	PUSH	r23
	PUSH	r24
.endm

.macro RESTORE_R24_TO_R13
	POP	r24
	POP	r23
	POP	r22
	POP	r21
	POP	r20
	POP	r19
	POP	r18
	POP	r17
	POP	r16
	POP	r15
	POP	r14
	POP	r13
.endm

/*--------------------------------------------------------------
 * Collect User Mode callee regs as struct callee_regs - needed by
 * fork/do_signal/unaligned-access-emulation.
 * (By default only scratch regs are saved on entry to kernel)
 *
 * Special handling for r25 if used for caching Task Pointer.
 * It would have been saved in task->thread.user_r25 already, but to keep
 * the interface same it is copied into regular r25 placeholder in
 * struct callee_regs.
 *-------------------------------------------------------------*/
.macro SAVE_CALLEE_SAVED_USER

mov	r12, sp		; save SP as ref to pt_regs
	SAVE_R13_TO_R24

#ifdef CONFIG_ARC_CURR_IN_REG
	; Retrieve orig r25 and save it with rest of callee_regs
	ld	r12, [r12, PT_user_r25]
	PUSH	r12
#else
	PUSH	r25
#endif

.endm

/*--------------------------------------------------------------
 * Save kernel Mode callee regs at the time of Contect Switch.
 *
 * Special handling for r25 if used for caching Task Pointer.
 * Kernel simply skips saving it since it will be loaded with
 * incoming task pointer anyways
 *-------------------------------------------------------------*/
.macro SAVE_CALLEE_SAVED_KERNEL

SAVE_R13_TO_R24

#ifdef CONFIG_ARC_CURR_IN_REG
	sub     sp, sp, 4
#else
	PUSH	r25
#endif
.endm

/*--------------------------------------------------------------
 * Opposite of SAVE_CALLEE_SAVED_KERNEL
 *-------------------------------------------------------------*/
.macro RESTORE_CALLEE_SAVED_KERNEL

#ifdef CONFIG_ARC_CURR_IN_REG
	add     sp, sp, 4  /* skip usual r25 placeholder */
#else
	POP	r25
#endif
	RESTORE_R24_TO_R13
.endm

/*--------------------------------------------------------------
 * Opposite of SAVE_CALLEE_SAVED_USER
 *
 * ptrace tracer or unaligned-access fixup might have changed a user mode
 * callee reg which is saved back to usual r25 storage location
 *-------------------------------------------------------------*/
.macro RESTORE_CALLEE_SAVED_USER

#ifdef CONFIG_ARC_CURR_IN_REG
	POP	r12
#else
	POP	r25
#endif
	RESTORE_R24_TO_R13

; SP is back to start of pt_regs
#ifdef CONFIG_ARC_CURR_IN_REG
	st	r12, [sp, PT_user_r25]
#endif
.endm

/*--------------------------------------------------------------
 * Super FAST Restore callee saved regs by simply re-adjusting SP
 *-------------------------------------------------------------*/
.macro DISCARD_CALLEE_SAVED_USER
	add     sp, sp, SZ_CALLEE_REGS
.endm

/*-------------------------------------------------------------
 * given a tsk struct, get to the base of it's kernel mode stack
 * tsk->thread_info is really a PAGE, whose bottom hoists stack
 * which grows upwards towards thread_info
 *------------------------------------------------------------*/

.macro GET_TSK_STACK_BASE tsk, out

/* Get task->thread_info (this is essentially start of a PAGE) */
	ld  \out, [\tsk, TASK_THREAD_INFO]

/* Go to end of page where stack begins (grows upwards) */
	add2 \out, \out, (THREAD_SIZE)/4

.endm

/*
 * @reg [OUT] thread_info->flags of "current"
 */
.macro GET_CURR_THR_INFO_FLAGS  reg
	GET_CURR_THR_INFO_FROM_SP  \reg
	ld  \reg, [\reg, THREAD_INFO_FLAGS]
.endm

#ifdef CONFIG_SMP

/*-------------------------------------------------
 * Retrieve the current running task on this CPU
 * 1. Determine curr CPU id.
 * 2. Use it to index into _current_task[ ]
 */
.macro  GET_CURR_TASK_ON_CPU   reg
	GET_CPU_ID  \reg
	ld.as  \reg, [@_current_task, \reg]
.endm

/*-------------------------------------------------
 * Save a new task as the "current" task on this CPU
 * 1. Determine curr CPU id.
 * 2. Use it to index into _current_task[ ]
 *
 * Coded differently than GET_CURR_TASK_ON_CPU (which uses LD.AS)
 * because ST r0, [r1, offset] can ONLY have s9 @offset
 * while   LD can take s9 (4 byte insn) or LIMM (8 byte insn)
 */

.macro  SET_CURR_TASK_ON_CPU    tsk, tmp
	GET_CPU_ID  \tmp
	add2 \tmp, @_current_task, \tmp
	st   \tsk, [\tmp]
#ifdef CONFIG_ARC_CURR_IN_REG
	mov r25, \tsk
#endif

.endm

#else   /* Uniprocessor implementation of macros */

.macro  GET_CURR_TASK_ON_CPU    reg
	ld  \reg, [@_current_task]
.endm

.macro  SET_CURR_TASK_ON_CPU    tsk, tmp
	st  \tsk, [@_current_task]
#ifdef CONFIG_ARC_CURR_IN_REG
	mov r25, \tsk
#endif
.endm

#endif /* SMP / UNI */

/* ------------------------------------------------------------------
 * Get the ptr to some field of Current Task at @off in task struct
 *  -Uses r25 for Current task ptr if that is enabled
 */

#ifdef CONFIG_ARC_CURR_IN_REG

.macro GET_CURR_TASK_FIELD_PTR  off,  reg
	add \reg, r25, \off
.endm

#else

.macro GET_CURR_TASK_FIELD_PTR  off,  reg
	GET_CURR_TASK_ON_CPU  \reg
	add \reg, \reg, \off
.endm

#endif	/* CONFIG_ARC_CURR_IN_REG */

#endif  /* __ASM_ARC_ENTRY_H */

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