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

#include <uapi/linux/audit.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/ptrace.h>

/* The system call number is given by the user in R12 */
static inline long syscall_get_nr(struct task_struct *task,
				  struct pt_regs *regs)
{
	return regs->r12;
}

static inline void syscall_rollback(struct task_struct *task,
				    struct pt_regs *regs)
{
	/* TODO.  */
}

static inline long syscall_get_error(struct task_struct *task,
				     struct pt_regs *regs)
{
	return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
}

static inline long syscall_get_return_value(struct task_struct *task,
					    struct pt_regs *regs)
{
	return regs->r3;
}

static inline void syscall_set_return_value(struct task_struct *task,
					    struct pt_regs *regs,
					    int error, long val)
{
	if (error)
		regs->r3 = -error;
	else
		regs->r3 = val;
}

static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
							  unsigned int n)
{
	switch (n) {
	case 5: return regs->r10;
	case 4: return regs->r9;
	case 3: return regs->r8;
	case 2: return regs->r7;
	case 1: return regs->r6;
	case 0: return regs->r5;
	default:
		BUG();
	}
	return ~0;
}

static inline void microblaze_set_syscall_arg(struct pt_regs *regs,
					      unsigned int n,
					      unsigned long val)
{
	switch (n) {
	case 5:
		regs->r10 = val;
	case 4:
		regs->r9 = val;
	case 3:
		regs->r8 = val;
	case 2:
		regs->r7 = val;
	case 1:
		regs->r6 = val;
	case 0:
		regs->r5 = val;
	default:
		BUG();
	}
}

static inline void syscall_get_arguments(struct task_struct *task,
					 struct pt_regs *regs,
					 unsigned int i, unsigned int n,
					 unsigned long *args)
{
	while (n--)
		*args++ = microblaze_get_syscall_arg(regs, i++);
}

static inline void syscall_set_arguments(struct task_struct *task,
					 struct pt_regs *regs,
					 unsigned int i, unsigned int n,
					 const unsigned long *args)
{
	while (n--)
		microblaze_set_syscall_arg(regs, i++, *args++);
}

asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs);
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);

static inline int syscall_get_arch(void)
{
	return AUDIT_ARCH_MICROBLAZE;
}
#endif /* __ASM_MICROBLAZE_SYSCALL_H */

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Name Type Size Permission Actions
Kbuild File 742 B 0644
asm-compat.h File 518 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 626 B 0644
cache.h File 644 B 0644
cacheflush.h File 4.12 KB 0644
checksum.h File 942 B 0644
cmpxchg.h File 919 B 0644
cpuinfo.h File 2.13 KB 0644
cputable.h File 1 B 0644
current.h File 850 B 0644
delay.h File 2.26 KB 0644
dma-mapping.h File 765 B 0644
dma.h File 706 B 0644
elf.h File 738 B 0644
entry.h File 1.13 KB 0644
exceptions.h File 2.08 KB 0644
fixmap.h File 1.96 KB 0644
flat.h File 2.26 KB 0644
ftrace.h File 641 B 0644
futex.h File 2.13 KB 0644
hash.h File 2.37 KB 0644
highmem.h File 2.2 KB 0644
hw_irq.h File 1 B 0644
io.h File 2.05 KB 0644
irq.h File 538 B 0644
irqflags.h File 2.6 KB 0644
kgdb.h File 739 B 0644
mmu.h File 4.19 KB 0644
mmu_context.h File 141 B 0644
mmu_context_mm.h File 3.91 KB 0644
module.h File 840 B 0644
page.h File 6.11 KB 0644
pci-bridge.h File 4.57 KB 0644
pci.h File 2.47 KB 0644
pgalloc.h File 4.74 KB 0644
pgtable.h File 17.66 KB 0644
processor.h File 4.11 KB 0644
prom.h File 713 B 0644
ptrace.h File 727 B 0644
pvr.h File 8.72 KB 0644
registers.h File 1.65 KB 0644
seccomp.h File 256 B 0644
sections.h File 637 B 0644
setup.h File 1.37 KB 0644
string.h File 630 B 0644
switch_to.h File 629 B 0644
syscall.h File 2.26 KB 0644
thread_info.h File 4.01 KB 0644
timex.h File 402 B 0644
tlb.h File 714 B 0644
tlbflush.h File 2.04 KB 0644
uaccess.h File 9.98 KB 0644
unaligned.h File 871 B 0644
unistd.h File 1.19 KB 0644
unwind.h File 719 B 0644
user.h File 1 B 0644