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/dsp-impl.h (3860B)

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
 *
 * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
 */
#ifndef __ASM_ARC_DSP_IMPL_H
#define __ASM_ARC_DSP_IMPL_H

#include <asm/dsp.h>

#define DSP_CTRL_DISABLED_ALL		0

#ifdef __ASSEMBLY__

/* clobbers r5 register */
.macro DSP_EARLY_INIT
#ifdef CONFIG_ISA_ARCV2
	lr	r5, [ARC_AUX_DSP_BUILD]
	bmsk	r5, r5, 7
	breq    r5, 0, 1f
	mov	r5, DSP_CTRL_DISABLED_ALL
	sr	r5, [ARC_AUX_DSP_CTRL]
1:
#endif
.endm

/* clobbers r10, r11 registers pair */
.macro DSP_SAVE_REGFILE_IRQ
#if defined(CONFIG_ARC_DSP_KERNEL)
	/*
	 * Drop any changes to DSP_CTRL made by userspace so userspace won't be
	 * able to break kernel - reset it to DSP_CTRL_DISABLED_ALL value
	 */
	mov	r10, DSP_CTRL_DISABLED_ALL
	sr	r10, [ARC_AUX_DSP_CTRL]

#elif defined(CONFIG_ARC_DSP_SAVE_RESTORE_REGS)
	/*
	 * Save DSP_CTRL register and reset it to value suitable for kernel
	 * (DSP_CTRL_DISABLED_ALL)
	 */
	mov	r10, DSP_CTRL_DISABLED_ALL
	aex	r10, [ARC_AUX_DSP_CTRL]
	st	r10, [sp, PT_DSP_CTRL]

#endif
.endm

/* clobbers r10, r11 registers pair */
.macro DSP_RESTORE_REGFILE_IRQ
#if defined(CONFIG_ARC_DSP_SAVE_RESTORE_REGS)
	ld	r10, [sp, PT_DSP_CTRL]
	sr	r10, [ARC_AUX_DSP_CTRL]

#endif
.endm

#else /* __ASEMBLY__ */

#include <linux/sched.h>
#include <asm/asserts.h>
#include <asm/switch_to.h>

#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS

/*
 * As we save new and restore old AUX register value in the same place we
 * can optimize a bit and use AEX instruction (swap contents of an auxiliary
 * register with a core register) instead of LR + SR pair.
 */
#define AUX_SAVE_RESTORE(_saveto, _readfrom, _offt, _aux)		\
do {									\
	long unsigned int _scratch;					\
									\
	__asm__ __volatile__(						\
		"ld	%0, [%2, %4]			\n"		\
		"aex	%0, [%3]			\n"		\
		"st	%0, [%1, %4]			\n"		\
		:							\
		  "=&r" (_scratch)	/* must be early clobber */	\
		:							\
		   "r" (_saveto),					\
		   "r" (_readfrom),					\
		   "Ir" (_aux),						\
		   "Ir" (_offt)						\
		:							\
		  "memory"						\
	);								\
} while (0)

#define DSP_AUX_SAVE_RESTORE(_saveto, _readfrom, _aux)			\
	AUX_SAVE_RESTORE(_saveto, _readfrom,				\
		offsetof(struct dsp_callee_regs, _aux),			\
		ARC_AUX_##_aux)

static inline void dsp_save_restore(struct task_struct *prev,
					struct task_struct *next)
{
	long unsigned int *saveto = &prev->thread.dsp.ACC0_GLO;
	long unsigned int *readfrom = &next->thread.dsp.ACC0_GLO;

DSP_AUX_SAVE_RESTORE(saveto, readfrom, ACC0_GLO);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, ACC0_GHI);

DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_BFLY0);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_FFT_CTRL);

#ifdef CONFIG_ARC_DSP_AGU_USERSPACE
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP0);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP1);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP2);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP3);

DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS0);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS1);

DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD0);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD1);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD2);
	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD3);
#endif /* CONFIG_ARC_DSP_AGU_USERSPACE */
}

#else /* !CONFIG_ARC_DSP_SAVE_RESTORE_REGS */
#define dsp_save_restore(p, n)
#endif /* CONFIG_ARC_DSP_SAVE_RESTORE_REGS */

static inline bool dsp_exist(void)
{
	struct bcr_generic bcr;

READ_BCR(ARC_AUX_DSP_BUILD, bcr);
	return !!bcr.ver;
}

static inline bool agu_exist(void)
{
	struct bcr_generic bcr;

READ_BCR(ARC_AUX_AGU_BUILD, bcr);
	return !!bcr.ver;
}

static inline void dsp_config_check(void)
{
	CHK_OPT_STRICT(CONFIG_ARC_DSP_HANDLED, dsp_exist());
	CHK_OPT_WEAK(CONFIG_ARC_DSP_AGU_USERSPACE, agu_exist());
}

#endif /* __ASEMBLY__ */
#endif /* __ASM_ARC_DSP_IMPL_H */

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