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

#include <uapi/asm/ptrace.h>

#if defined(__sparc__) && defined(__arch64__)
#ifndef __ASSEMBLER__

#include <linux/compiler.h>
#include <linux/threads.h>
#include <asm/switch_to.h>

static inline int pt_regs_trap_type(struct pt_regs *regs)
{
        return regs->magic & 0x1ff;
}

static inline bool pt_regs_is_syscall(struct pt_regs *regs)
{
        return (regs->tstate & TSTATE_SYSCALL);
}

static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
{
        return (regs->tstate &= ~TSTATE_SYSCALL);
}

#define arch_ptrace_stop_needed() \
({      flush_user_windows(); \
        get_thread_wsaved() != 0; \
})

#define arch_ptrace_stop() \
        synchronize_user_stack()

#define current_pt_regs() \
        ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)

struct global_reg_snapshot {
        unsigned long           tstate;
        unsigned long           tpc;
        unsigned long           tnpc;
        unsigned long           o7;
        unsigned long           i7;
        unsigned long           rpc;
        struct thread_info      *thread;
        unsigned long           pad1;
};

struct global_pmu_snapshot {
        unsigned long           pcr[4];
        unsigned long           pic[4];
};

union global_cpu_snapshot {
        struct global_reg_snapshot      reg;
        struct global_pmu_snapshot      pmu;
};

extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];

#define force_successful_syscall_return() set_thread_noerror(1)
#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
#define instruction_pointer(regs) ((regs)->tpc)
#define instruction_pointer_set(regs, val) do { \
                (regs)->tpc = (val); \
                (regs)->tnpc = (val)+4; \
        } while (0)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
static inline int is_syscall_success(struct pt_regs *regs)
{
        return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
}

static inline long regs_return_value(struct pt_regs *regs)
{
        return regs->u_regs[UREG_I0];
}
#ifdef CONFIG_SMP
unsigned long profile_pc(struct pt_regs *);
#else
#define profile_pc(regs) instruction_pointer(regs)
#endif

#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))

int regs_query_register_offset(const char *name);
unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);

/**
 * regs_get_register() - get register value from its offset
 * @regs:       pt_regs from which register value is gotten
 * @offset:     offset number of the register.
 *
 * regs_get_register returns the value of a register whose
 * offset from @regs. The @offset is the offset of the register
 * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET,
 * this returns 0.
 */
static inline unsigned long regs_get_register(struct pt_regs *regs,
                                             unsigned long offset)
{
        if (unlikely(offset >= MAX_REG_OFFSET))
                return 0;
        if (offset == PT_V9_Y)
                return *(unsigned int *)((unsigned long)regs + offset);
        return *(unsigned long *)((unsigned long)regs + offset);
}

/* Valid only for Kernel mode traps. */
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
{
        return regs->u_regs[UREG_I6];
}
#else /* __ASSEMBLER__ */
#endif /* __ASSEMBLER__ */
#else /* (defined(__sparc__) && defined(__arch64__)) */
#ifndef __ASSEMBLER__
#include <asm/switch_to.h>

static inline bool pt_regs_is_syscall(struct pt_regs *regs)
{
        return (regs->psr & PSR_SYSCALL);
}

static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
{
        return (regs->psr &= ~PSR_SYSCALL);
}

#define arch_ptrace_stop_needed() \
({      flush_user_windows(); \
        current_thread_info()->w_saved != 0;    \
})

#define arch_ptrace_stop() \
        synchronize_user_stack()

#define current_pt_regs() \
        ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)

#define user_mode(regs) (!((regs)->psr & PSR_PS))
#define instruction_pointer(regs) ((regs)->pc)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
unsigned long profile_pc(struct pt_regs *);
#else /* (!__ASSEMBLER__) */
#endif /* (!__ASSEMBLER__) */
#endif /* (defined(__sparc__) && defined(__arch64__)) */
#define STACK_BIAS              2047

/* global_reg_snapshot offsets */
#define GR_SNAP_TSTATE  0x00
#define GR_SNAP_TPC     0x08
#define GR_SNAP_TNPC    0x10
#define GR_SNAP_O7      0x18
#define GR_SNAP_I7      0x20
#define GR_SNAP_RPC     0x28
#define GR_SNAP_THREAD  0x30
#define GR_SNAP_PAD1    0x38

#endif /* !(__SPARC_PTRACE_H) */