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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_SWITCH_TO_32_H
#define __ASM_SH_SWITCH_TO_32_H

#ifdef CONFIG_SH_DSP

#define is_dsp_enabled(tsk)						\
	(!!(tsk->thread.dsp_status.status & SR_DSP))

#define __restore_dsp(tsk)						\
do {									\
	register u32 *__ts2 __asm__ ("r2") =				\
			(u32 *)&tsk->thread.dsp_status;			\
	__asm__ __volatile__ (						\
		".balign 4\n\t"						\
		"movs.l	@r2+, a0\n\t"					\
		"movs.l	@r2+, a1\n\t"					\
		"movs.l	@r2+, a0g\n\t"					\
		"movs.l	@r2+, a1g\n\t"					\
		"movs.l	@r2+, m0\n\t"					\
		"movs.l	@r2+, m1\n\t"					\
		"movs.l	@r2+, x0\n\t"					\
		"movs.l	@r2+, x1\n\t"					\
		"movs.l	@r2+, y0\n\t"					\
		"movs.l	@r2+, y1\n\t"					\
		"lds.l	@r2+, dsr\n\t"					\
		"ldc.l	@r2+, rs\n\t"					\
		"ldc.l	@r2+, re\n\t"					\
		"ldc.l	@r2+, mod\n\t"					\
		: : "r" (__ts2));					\
} while (0)

#define __save_dsp(tsk)							\
do {									\
	register u32 *__ts2 __asm__ ("r2") =				\
			(u32 *)&tsk->thread.dsp_status + 14;		\
									\
	__asm__ __volatile__ (						\
		".balign 4\n\t"						\
		"stc.l	mod, @-r2\n\t"					\
		"stc.l	re, @-r2\n\t"					\
		"stc.l	rs, @-r2\n\t"					\
		"sts.l	dsr, @-r2\n\t"					\
		"movs.l	y1, @-r2\n\t"					\
		"movs.l	y0, @-r2\n\t"					\
		"movs.l	x1, @-r2\n\t"					\
		"movs.l	x0, @-r2\n\t"					\
		"movs.l	m1, @-r2\n\t"					\
		"movs.l	m0, @-r2\n\t"					\
		"movs.l	a1g, @-r2\n\t"					\
		"movs.l	a0g, @-r2\n\t"					\
		"movs.l	a1, @-r2\n\t"					\
		"movs.l	a0, @-r2\n\t"					\
		: : "r" (__ts2));					\
} while (0)

#else

#define is_dsp_enabled(tsk)	(0)
#define __save_dsp(tsk)		do { } while (0)
#define __restore_dsp(tsk)	do { } while (0)
#endif

struct task_struct *__switch_to(struct task_struct *prev,
				struct task_struct *next);

/*
 *	switch_to() should switch tasks to task nr n, first
 */
#define switch_to(prev, next, last)				\
do {								\
	register u32 *__ts1 __asm__ ("r1");			\
	register u32 *__ts2 __asm__ ("r2");			\
	register u32 *__ts4 __asm__ ("r4");			\
	register u32 *__ts5 __asm__ ("r5");			\
	register u32 *__ts6 __asm__ ("r6");			\
	register u32 __ts7 __asm__ ("r7");			\
	struct task_struct *__last;				\
								\
	if (is_dsp_enabled(prev))				\
		__save_dsp(prev);				\
	if (is_dsp_enabled(next))				\
		__restore_dsp(next);				\
								\
	__ts1 = (u32 *)&prev->thread.sp;			\
	__ts2 = (u32 *)&prev->thread.pc;			\
	__ts4 = (u32 *)prev;					\
	__ts5 = (u32 *)next;					\
	__ts6 = (u32 *)&next->thread.sp;			\
	__ts7 = next->thread.pc;				\
								\
	__asm__ __volatile__ (					\
		".balign 4\n\t"					\
		"stc.l	gbr, @-r15\n\t"				\
		"sts.l	pr, @-r15\n\t"				\
		"mov.l	r8, @-r15\n\t"				\
		"mov.l	r9, @-r15\n\t"				\
		"mov.l	r10, @-r15\n\t"				\
		"mov.l	r11, @-r15\n\t"				\
		"mov.l	r12, @-r15\n\t"				\
		"mov.l	r13, @-r15\n\t"				\
		"mov.l	r14, @-r15\n\t"				\
		"mov.l	r15, @r1\t! save SP\n\t"		\
		"mov.l	@r6, r15\t! change to new stack\n\t"	\
		"mova	1f, %0\n\t"				\
		"mov.l	%0, @r2\t! save PC\n\t"			\
		"mov.l	2f, %0\n\t"				\
		"jmp	@%0\t! call __switch_to\n\t"		\
		" lds	r7, pr\t!  with return to new PC\n\t"	\
		".balign	4\n"				\
		"2:\n\t"					\
		".long	__switch_to\n"				\
		"1:\n\t"					\
		"mov.l	@r15+, r14\n\t"				\
		"mov.l	@r15+, r13\n\t"				\
		"mov.l	@r15+, r12\n\t"				\
		"mov.l	@r15+, r11\n\t"				\
		"mov.l	@r15+, r10\n\t"				\
		"mov.l	@r15+, r9\n\t"				\
		"mov.l	@r15+, r8\n\t"				\
		"lds.l	@r15+, pr\n\t"				\
		"ldc.l	@r15+, gbr\n\t"				\
		: "=z" (__last)					\
		: "r" (__ts1), "r" (__ts2), "r" (__ts4),	\
		  "r" (__ts5), "r" (__ts6), "r" (__ts7)		\
		: "r3", "t");					\
								\
	last = __last;						\
} while (0)

#endif /* __ASM_SH_SWITCH_TO_32_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 467 B 0644
adc.h File 253 B 0644
addrspace.h File 2.03 KB 0644
alignment.h File 654 B 0644
asm-offsets.h File 35 B 0644
atomic-grb.h File 2.6 KB 0644
atomic-irq.h File 1.63 KB 0644
atomic-llsc.h File 2.12 KB 0644
atomic.h File 1.78 KB 0644
barrier.h File 1.52 KB 0644
bitops-cas.h File 1.73 KB 0644
bitops-grb.h File 6.21 KB 0644
bitops-llsc.h File 2.79 KB 0644
bitops-op32.h File 3.78 KB 0644
bitops.h File 2.38 KB 0644
bl_bit.h File 216 B 0644
bl_bit_32.h File 639 B 0644
bl_bit_64.h File 979 B 0644
bug.h File 2.77 KB 0644
bugs.h File 1.38 KB 0644
cache.h File 1.2 KB 0644
cache_insns.h File 242 B 0644
cache_insns_32.h File 642 B 0644
cache_insns_64.h File 839 B 0644
cacheflush.h File 3.58 KB 0644
checksum.h File 140 B 0644
checksum_32.h File 5.21 KB 0644
clock.h File 436 B 0644
cmpxchg-cas.h File 549 B 0644
cmpxchg-grb.h File 2.8 KB 0644
cmpxchg-irq.h File 1.04 KB 0644
cmpxchg-llsc.h File 1.06 KB 0644
cmpxchg-xchg.h File 1.33 KB 0644
cmpxchg.h File 1.77 KB 0644
device.h File 450 B 0644
dma-mapping.h File 694 B 0644
dma-register.h File 1.8 KB 0644
dma.h File 3.74 KB 0644
dmabrg.h File 536 B 0644
dwarf.h File 9.8 KB 0644
elf.h File 7.28 KB 0644
entry-macros.S File 1.85 KB 0644
extable.h File 227 B 0644
fb.h File 375 B 0644
fixmap.h File 2.92 KB 0644
flat.h File 1.23 KB 0644
fpu.h File 1.77 KB 0644
freq.h File 472 B 0644
ftrace.h File 1.11 KB 0644
futex-cas.h File 728 B 0644
futex-irq.h File 482 B 0644
futex-llsc.h File 870 B 0644
futex.h File 1.5 KB 0644
gpio.h File 1017 B 0644
hardirq.h File 440 B 0644
hd64461.h File 11.79 KB 0644
heartbeat.h File 383 B 0644
hugetlb.h File 1.96 KB 0644
hw_breakpoint.h File 1.88 KB 0644
hw_irq.h File 915 B 0644
i2c-sh7760.h File 406 B 0644
io.h File 11.33 KB 0644
io_generic.h File 661 B 0644
io_noioport.h File 1.09 KB 0644
io_trapped.h File 1.44 KB 0644
irq.h File 1.68 KB 0644
irqflags.h File 226 B 0644
kdebug.h File 406 B 0644
kexec.h File 2.61 KB 0644
kgdb.h File 851 B 0644
kmap_types.h File 265 B 0644
kprobes.h File 1.51 KB 0644
linkage.h File 154 B 0644
machvec.h File 939 B 0644
mmu.h File 2.18 KB 0644
mmu_context.h File 4.44 KB 0644
mmu_context_32.h File 1.28 KB 0644
mmu_context_64.h File 1.97 KB 0644
mmzone.h File 1.1 KB 0644
module.h File 1005 B 0644
page.h File 6.06 KB 0644
pci.h File 3.19 KB 0644
perf_event.h File 797 B 0644
pgalloc.h File 1.86 KB 0644
pgtable-2level.h File 598 B 0644
pgtable-3level.h File 1.54 KB 0644
pgtable.h File 4 KB 0644
pgtable_32.h File 16.37 KB 0644
pgtable_64.h File 11.32 KB 0644
posix_types.h File 146 B 0644
processor.h File 4.41 KB 0644
processor_32.h File 4.67 KB 0644
processor_64.h File 5.54 KB 0644
ptrace.h File 3.39 KB 0644
ptrace_32.h File 307 B 0644
ptrace_64.h File 312 B 0644
push-switch.h File 755 B 0644
reboot.h File 472 B 0644
romimage-macros.h File 1.1 KB 0644
rtc.h File 383 B 0644
seccomp.h File 280 B 0644
sections.h File 307 B 0644
segment.h File 879 B 0644
setup.h File 725 B 0644
sfp-machine.h File 3.43 KB 0644
sh7760fb.h File 5.61 KB 0644
sh_bios.h File 743 B 0644
shmparam.h File 629 B 0644
siu.h File 539 B 0644
smc37c93x.h File 5.56 KB 0644
smp-ops.h File 1012 B 0644
smp.h File 1.83 KB 0644
sparsemem.h File 443 B 0644
spi.h File 265 B 0644
spinlock-cas.h File 2.09 KB 0644
spinlock-llsc.h File 4.13 KB 0644
spinlock.h File 578 B 0644
spinlock_types.h File 463 B 0644
sram.h File 670 B 0644
stackprotector.h File 711 B 0644
stacktrace.h File 606 B 0644
string.h File 131 B 0644
string_32.h File 2.66 KB 0644
string_64.h File 499 B 0644
suspend.h File 2.52 KB 0644
switch_to.h File 492 B 0644
switch_to_32.h File 3.55 KB 0644
switch_to_64.h File 968 B 0644
syscall.h File 267 B 0644
syscall_32.h File 2.42 KB 0644
syscall_64.h File 1.79 KB 0644
syscalls.h File 564 B 0644
syscalls_32.h File 1022 B 0644
syscalls_64.h File 441 B 0644
thread_info.h File 5.32 KB 0644
timex.h File 637 B 0644
tlb.h File 4.12 KB 0644
tlb_64.h File 2.08 KB 0644
tlbflush.h File 1.77 KB 0644
topology.h File 645 B 0644
traps.h File 487 B 0644
traps_32.h File 1.31 KB 0644
traps_64.h File 851 B 0644
types.h File 411 B 0644
uaccess.h File 4.83 KB 0644
uaccess_32.h File 3.77 KB 0644
uaccess_64.h File 2.2 KB 0644
unaligned-sh4a.h File 4.51 KB 0644
unaligned.h File 359 B 0644
uncached.h File 1.34 KB 0644
unistd.h File 952 B 0644
unwinder.h File 856 B 0644
user.h File 2.52 KB 0644
vga.h File 98 B 0644
vmlinux.lds.h File 558 B 0644
watchdog.h File 4.14 KB 0644
word-at-a-time.h File 1.29 KB 0644