Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SPARC_SYSCALL_H
#define __ASM_SPARC_SYSCALL_H
 
#include <uapi/linux/audit.h>
#include <linux/kernel.h>
#include <linux/compat.h>
#include <linux/sched.h>
#include <asm/ptrace.h>
#include <asm/thread_info.h>
 
/*
 * The syscall table always contains 32 bit pointers since we know that the
 * address of the function to be called is (way) below 4GB.  So the "int"
 * type here is what we want [need] for both 32 bit and 64 bit systems.
 */
extern const unsigned int sys_call_table[];
 
/* The system call number is given by the user in %g1 */
static inline long syscall_get_nr(struct task_struct *task,
<------><------><------><------>  struct pt_regs *regs)
{
<------>int syscall_p = pt_regs_is_syscall(regs);
 
<------>return (syscall_p ? regs->u_regs[UREG_G1] : -1L);
}
 
static inline void syscall_rollback(struct task_struct *task,
<------><------><------><------>    struct pt_regs *regs)
{
<------>/* XXX This needs some thought.  On Sparc we don't
<------> * XXX save away the original %o0 value somewhere.
<------> * XXX Instead we hold it in register %l5 at the top
<------> * XXX level trap frame and pass this down to the signal
<------> * XXX dispatch code which is the only place that value
<------> * XXX ever was needed.
<------> */
}
 
#ifdef CONFIG_SPARC32
static inline bool syscall_has_error(struct pt_regs *regs)
{
<------>return (regs->psr & PSR_C) ? true : false;
}
static inline void syscall_set_error(struct pt_regs *regs)
{
<------>regs->psr |= PSR_C;
}
static inline void syscall_clear_error(struct pt_regs *regs)
{
<------>regs->psr &= ~PSR_C;
}
#else
static inline bool syscall_has_error(struct pt_regs *regs)
{
<------>return (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)) ? true : false;
}
static inline void syscall_set_error(struct pt_regs *regs)
{
<------>regs->tstate |= (TSTATE_XCARRY | TSTATE_ICARRY);
}
static inline void syscall_clear_error(struct pt_regs *regs)
{
<------>regs->tstate &= ~(TSTATE_XCARRY | TSTATE_ICARRY);
}
#endif
 
static inline long syscall_get_error(struct task_struct *task,
<------><------><------><------>     struct pt_regs *regs)
{
<------>long val = regs->u_regs[UREG_I0];
 
<------>return (syscall_has_error(regs) ? -val : 0);
}
 
static inline long syscall_get_return_value(struct task_struct *task,
<------><------><------><------><------>    struct pt_regs *regs)
{
<------>long val = regs->u_regs[UREG_I0];
 
<------>return val;
}
 
static inline void syscall_set_return_value(struct task_struct *task,
<------><------><------><------><------>    struct pt_regs *regs,
<------><------><------><------><------>    int error, long val)
{
<------>if (error) {
<------><------>syscall_set_error(regs);
<------><------>regs->u_regs[UREG_I0] = -error;
<------>} else {
<------><------>syscall_clear_error(regs);
<------><------>regs->u_regs[UREG_I0] = val;
<------>}
}
 
static inline void syscall_get_arguments(struct task_struct *task,
<------><------><------><------><------> struct pt_regs *regs,
<------><------><------><------><------> unsigned long *args)
{
<------>int zero_extend = 0;
<------>unsigned int j;
<------>unsigned int n = 6;
 
#ifdef CONFIG_SPARC64
<------>if (test_tsk_thread_flag(task, TIF_32BIT))
<------><------>zero_extend = 1;
#endif
 
<------>for (j = 0; j < n; j++) {
<------><------>unsigned long val = regs->u_regs[UREG_I0 + j];
 
<------><------>if (zero_extend)
<------><------><------>args[j] = (u32) val;
<------><------>else
<------><------><------>args[j] = val;
<------>}
}
 
static inline void syscall_set_arguments(struct task_struct *task,
<------><------><------><------><------> struct pt_regs *regs,
<------><------><------><------><------> const unsigned long *args)
{
<------>unsigned int i;
 
<------>for (i = 0; i < 6; i++)
<------><------>regs->u_regs[UREG_I0 + i] = args[i];
}
 
static inline int syscall_get_arch(struct task_struct *task)
{
#if defined(CONFIG_SPARC64) && defined(CONFIG_COMPAT)
<------>return test_tsk_thread_flag(task, TIF_32BIT)
<------><------>? AUDIT_ARCH_SPARC : AUDIT_ARCH_SPARC64;
#elif defined(CONFIG_SPARC64)
<------>return AUDIT_ARCH_SPARC64;
#else
<------>return AUDIT_ARCH_SPARC;
#endif
}
 
#endif /* __ASM_SPARC_SYSCALL_H */