/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_INTERRUPT_H
#define _ASM_POWERPC_INTERRUPT_H

/* BookE/4xx */
#define INTERRUPT_CRITICAL_INPUT  0x100

/* BookE */
#define INTERRUPT_DEBUG           0xd00
#ifdef CONFIG_BOOKE
#define INTERRUPT_PERFMON         0x260
#define INTERRUPT_DOORBELL        0x280
#endif

/* BookS/4xx/8xx */
#define INTERRUPT_MACHINE_CHECK   0x200

/* BookS/8xx */
#define INTERRUPT_SYSTEM_RESET    0x100

/* BookS */
#define INTERRUPT_DATA_SEGMENT    0x380
#define INTERRUPT_INST_SEGMENT    0x480
#define INTERRUPT_TRACE           0xd00
#define INTERRUPT_H_DATA_STORAGE  0xe00
#define INTERRUPT_HMI                   0xe60
#define INTERRUPT_H_FAC_UNAVAIL   0xf80
#ifdef CONFIG_PPC_BOOK3S
#define INTERRUPT_DOORBELL        0xa00
#define INTERRUPT_PERFMON         0xf00
#define INTERRUPT_ALTIVEC_UNAVAIL       0xf20
#endif

/* BookE/BookS/4xx/8xx */
#define INTERRUPT_DATA_STORAGE    0x300
#define INTERRUPT_INST_STORAGE    0x400
#define INTERRUPT_EXTERNAL              0x500
#define INTERRUPT_ALIGNMENT       0x600
#define INTERRUPT_PROGRAM         0x700
#define INTERRUPT_SYSCALL         0xc00
#define INTERRUPT_TRACE                 0xd00

/* BookE/BookS/44x */
#define INTERRUPT_FP_UNAVAIL      0x800

/* BookE/BookS/44x/8xx */
#define INTERRUPT_DECREMENTER     0x900

#ifndef INTERRUPT_PERFMON
#define INTERRUPT_PERFMON         0x0
#endif

/* 8xx */
#define INTERRUPT_SOFT_EMU_8xx          0x1000
#define INTERRUPT_INST_TLB_MISS_8xx     0x1100
#define INTERRUPT_DATA_TLB_MISS_8xx     0x1200
#define INTERRUPT_INST_TLB_ERROR_8xx    0x1300
#define INTERRUPT_DATA_TLB_ERROR_8xx    0x1400
#define INTERRUPT_DATA_BREAKPOINT_8xx   0x1c00
#define INTERRUPT_INST_BREAKPOINT_8xx   0x1d00

/* 603 */
#define INTERRUPT_INST_TLB_MISS_603             0x1000
#define INTERRUPT_DATA_LOAD_TLB_MISS_603        0x1100
#define INTERRUPT_DATA_STORE_TLB_MISS_603       0x1200

#ifndef __ASSEMBLER__

#include <linux/context_tracking.h>
#include <linux/hardirq.h>
#include <asm/cputime.h>
#include <asm/firmware.h>
#include <asm/ftrace.h>
#include <asm/kprobes.h>
#include <asm/runlatch.h>

#ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG
/*
 * WARN/BUG is handled with a program interrupt so minimise checks here to
 * avoid recursion and maximise the chance of getting the first oops handled.
 */
#define INT_SOFT_MASK_BUG_ON(regs, cond)                                \
do {                                                                    \
        if ((user_mode(regs) || (TRAP(regs) != INTERRUPT_PROGRAM)))     \
                BUG_ON(cond);                                           \
} while (0)
#else
#define INT_SOFT_MASK_BUG_ON(regs, cond)
#endif

#ifdef CONFIG_PPC_BOOK3S_64
extern char __end_soft_masked[];
bool search_kernel_soft_mask_table(unsigned long addr);
unsigned long search_kernel_restart_table(unsigned long addr);

DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);

static inline bool is_implicit_soft_masked(struct pt_regs *regs)
{
        if (user_mode(regs))
                return false;

        if (regs->nip >= (unsigned long)__end_soft_masked)
                return false;

        return search_kernel_soft_mask_table(regs->nip);
}

static inline void srr_regs_clobbered(void)
{
        local_paca->srr_valid = 0;
        local_paca->hsrr_valid = 0;
}
#else
static inline unsigned long search_kernel_restart_table(unsigned long addr)
{
        return 0;
}

static inline bool is_implicit_soft_masked(struct pt_regs *regs)
{
        return false;
}

static inline void srr_regs_clobbered(void)
{
}
#endif

static inline void nap_adjust_return(struct pt_regs *regs)
{
#ifdef CONFIG_PPC_970_NAP
        if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
                /* Can avoid a test-and-clear because NMIs do not call this */
                clear_thread_local_flags(_TLF_NAPPING);
                regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
        }
#endif
}

static inline void booke_restore_dbcr0(void)
{
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
        unsigned long dbcr0 = current->thread.debug.dbcr0;

        if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
                mtspr(SPRN_DBSR, -1);
                mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
        }
#endif
}

static inline void interrupt_enter_prepare(struct pt_regs *regs)
{
#ifdef CONFIG_PPC64
        irq_soft_mask_set(IRQS_ALL_DISABLED);

        /*
         * If the interrupt was taken with HARD_DIS clear, then enable MSR[EE].
         * Asynchronous interrupts get here with HARD_DIS set (see below), so
         * this enables MSR[EE] for synchronous interrupts. IRQs remain
         * soft-masked. The interrupt handler may later call
         * interrupt_cond_local_irq_enable() to achieve a regular process
         * context.
         */
        if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) {
                INT_SOFT_MASK_BUG_ON(regs, !(regs->msr & MSR_EE));
                __hard_irq_enable();
        } else {
                __hard_RI_enable();
        }
        /* Enable MSR[RI] early, to support kernel SLB and hash faults */
#endif

        if (!arch_irq_disabled_regs(regs))
                trace_hardirqs_off();

        if (user_mode(regs)) {
                kuap_lock();
                CT_WARN_ON(ct_state() != CT_STATE_USER);
                user_exit_irqoff();

                account_cpu_user_entry();
                account_stolen_time();
        } else {
                kuap_save_and_lock(regs);
                /*
                 * CT_WARN_ON comes here via program_check_exception,
                 * so avoid recursion.
                 */
                if (TRAP(regs) != INTERRUPT_PROGRAM)
                        CT_WARN_ON(ct_state() != CT_STATE_KERNEL &&
                                   ct_state() != CT_STATE_IDLE);
                INT_SOFT_MASK_BUG_ON(regs, is_implicit_soft_masked(regs));
                INT_SOFT_MASK_BUG_ON(regs, arch_irq_disabled_regs(regs) &&
                                           search_kernel_restart_table(regs->nip));
        }
        INT_SOFT_MASK_BUG_ON(regs, !arch_irq_disabled_regs(regs) &&
                                   !(regs->msr & MSR_EE));

        booke_restore_dbcr0();
}

/*
 * Care should be taken to note that interrupt_exit_prepare and
 * interrupt_async_exit_prepare do not necessarily return immediately to
 * regs context (e.g., if regs is usermode, we don't necessarily return to
 * user mode). Other interrupts might be taken between here and return,
 * context switch / preemption may occur in the exit path after this, or a
 * signal may be delivered, etc.
 *
 * The real interrupt exit code is platform specific, e.g.,
 * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
 *
 * However interrupt_nmi_exit_prepare does return directly to regs, because
 * NMIs do not do "exit work" or replay soft-masked interrupts.
 */
static inline void interrupt_exit_prepare(struct pt_regs *regs)
{
}

static inline void interrupt_async_enter_prepare(struct pt_regs *regs)
{
#ifdef CONFIG_PPC64
        /* Ensure interrupt_enter_prepare does not enable MSR[EE] */
        local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
#endif
        interrupt_enter_prepare(regs);
#ifdef CONFIG_PPC_BOOK3S_64
        /*
         * RI=1 is set by interrupt_enter_prepare, so this thread flags access
         * has to come afterward (it can cause SLB faults).
         */
        if (cpu_has_feature(CPU_FTR_CTRL) &&
            !test_thread_local_flags(_TLF_RUNLATCH))
                __ppc64_runlatch_on();
#endif
        irq_enter();
}

static inline void interrupt_async_exit_prepare(struct pt_regs *regs)
{
        /*
         * Adjust at exit so the main handler sees the true NIA. This must
         * come before irq_exit() because irq_exit can enable interrupts, and
         * if another interrupt is taken before nap_adjust_return has run
         * here, then that interrupt would return directly to idle nap return.
         */
        nap_adjust_return(regs);

        irq_exit();
        interrupt_exit_prepare(regs);
}

struct interrupt_nmi_state {
#ifdef CONFIG_PPC64
        u8 irq_soft_mask;
        u8 irq_happened;
        u8 ftrace_enabled;
        u64 softe;
#endif
};

static inline bool nmi_disables_ftrace(struct pt_regs *regs)
{
        /* Allow DEC and PMI to be traced when they are soft-NMI */
        if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
                if (TRAP(regs) == INTERRUPT_DECREMENTER)
                       return false;
                if (TRAP(regs) == INTERRUPT_PERFMON)
                       return false;
        }
        if (IS_ENABLED(CONFIG_PPC_BOOK3E_64)) {
                if (TRAP(regs) == INTERRUPT_PERFMON)
                        return false;
        }

        return true;
}

static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
{
#ifdef CONFIG_PPC64
        state->irq_soft_mask = local_paca->irq_soft_mask;
        state->irq_happened = local_paca->irq_happened;
        state->softe = regs->softe;

        /*
         * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
         * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
         * because that goes through irq tracing which we don't want in NMI.
         */
        local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
        local_paca->irq_happened |= PACA_IRQ_HARD_DIS;

        if (!(regs->msr & MSR_EE) || is_implicit_soft_masked(regs)) {
                /*
                 * Adjust regs->softe to be soft-masked if it had not been
                 * reconcied (e.g., interrupt entry with MSR[EE]=0 but softe
                 * not yet set disabled), or if it was in an implicit soft
                 * masked state. This makes arch_irq_disabled_regs(regs)
                 * behave as expected.
                 */
                regs->softe = IRQS_ALL_DISABLED;
        }

        __hard_RI_enable();

        /* Don't do any per-CPU operations until interrupt state is fixed */

        if (nmi_disables_ftrace(regs)) {
                state->ftrace_enabled = this_cpu_get_ftrace_enabled();
                this_cpu_set_ftrace_enabled(0);
        }
#endif

        /* If data relocations are enabled, it's safe to use nmi_enter() */
        if (mfmsr() & MSR_DR) {
                nmi_enter();
                return;
        }

        /*
         * But do not use nmi_enter() for pseries hash guest taking a real-mode
         * NMI because not everything it touches is within the RMA limit.
         */
        if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
            firmware_has_feature(FW_FEATURE_LPAR) &&
            !radix_enabled())
                return;

        /*
         * Likewise, don't use it if we have some form of instrumentation (like
         * KASAN shadow) that is not safe to access in real mode (even on radix)
         */
        if (IS_ENABLED(CONFIG_KASAN))
                return;

        /*
         * Likewise, do not use it in real mode if percpu first chunk is not
         * embedded. With CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there
         * are chances where percpu allocation can come from vmalloc area.
         */
        if (percpu_first_chunk_is_paged)
                return;

        /* Otherwise, it should be safe to call it */
        nmi_enter();
}

static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
{
        if (mfmsr() & MSR_DR) {
                // nmi_exit if relocations are on
                nmi_exit();
        } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
                   firmware_has_feature(FW_FEATURE_LPAR) &&
                   !radix_enabled()) {
                // no nmi_exit for a pseries hash guest taking a real mode exception
        } else if (IS_ENABLED(CONFIG_KASAN)) {
                // no nmi_exit for KASAN in real mode
        } else if (percpu_first_chunk_is_paged) {
                // no nmi_exit if percpu first chunk is not embedded
        } else {
                nmi_exit();
        }

        /*
         * nmi does not call nap_adjust_return because nmi should not create
         * new work to do (must use irq_work for that).
         */

#ifdef CONFIG_PPC64
#ifdef CONFIG_PPC_BOOK3S
        if (arch_irq_disabled_regs(regs)) {
                unsigned long rst = search_kernel_restart_table(regs->nip);
                if (rst)
                        regs_set_return_ip(regs, rst);
        }
#endif

        if (nmi_disables_ftrace(regs))
                this_cpu_set_ftrace_enabled(state->ftrace_enabled);

        /* Check we didn't change the pending interrupt mask. */
        WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
        regs->softe = state->softe;
        local_paca->irq_happened = state->irq_happened;
        local_paca->irq_soft_mask = state->irq_soft_mask;
#endif
}

/*
 * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
 * function definition. The reason for this is the noinstr section is placed
 * after the main text section, i.e., very far away from the interrupt entry
 * asm. That creates problems with fitting linker stubs when building large
 * kernels.
 */
#define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address

/**
 * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
 * @func:       Function name of the entry point
 * @returns:    Returns a value back to asm caller
 */
#define DECLARE_INTERRUPT_HANDLER_RAW(func)                             \
        __visible long func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
 * @func:       Function name of the entry point
 * @returns:    Returns a value back to asm caller
 *
 * @func is called from ASM entry code.
 *
 * This is a plain function which does no tracing, reconciling, etc.
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 *
 * raw interrupt handlers must not enable or disable interrupts, or
 * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
 * not be advisable either, although may be possible in a pinch, the
 * trace will look odd at least.
 *
 * A raw handler may call one of the other interrupt handler functions
 * to be converted into that interrupt context without these restrictions.
 *
 * On PPC64, _RAW handlers may return with fast_interrupt_return.
 *
 * Specific handlers may have additional restrictions.
 */
#define DEFINE_INTERRUPT_HANDLER_RAW(func)                              \
static __always_inline __no_sanitize_address __no_kcsan long            \
____##func(struct pt_regs *regs);                                       \
                                                                        \
interrupt_handler long func(struct pt_regs *regs)                       \
{                                                                       \
        long ret;                                                       \
                                                                        \
        __hard_RI_enable();                                             \
                                                                        \
        ret = ____##func (regs);                                        \
                                                                        \
        return ret;                                                     \
}                                                                       \
NOKPROBE_SYMBOL(func);                                                  \
                                                                        \
static __always_inline __no_sanitize_address __no_kcsan long            \
____##func(struct pt_regs *regs)

/**
 * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
 * @func:       Function name of the entry point
 */
#define DECLARE_INTERRUPT_HANDLER(func)                                 \
        __visible void func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
 * @func:       Function name of the entry point
 *
 * @func is called from ASM entry code.
 *
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 */
#define DEFINE_INTERRUPT_HANDLER(func)                                  \
static __always_inline void ____##func(struct pt_regs *regs);           \
                                                                        \
interrupt_handler void func(struct pt_regs *regs)                       \
{                                                                       \
        interrupt_enter_prepare(regs);                                  \
                                                                        \
        ____##func (regs);                                              \
                                                                        \
        interrupt_exit_prepare(regs);                                   \
}                                                                       \
NOKPROBE_SYMBOL(func);                                                  \
                                                                        \
static __always_inline void ____##func(struct pt_regs *regs)

/**
 * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
 * @func:       Function name of the entry point
 * @returns:    Returns a value back to asm caller
 */
#define DECLARE_INTERRUPT_HANDLER_RET(func)                             \
        __visible long func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
 * @func:       Function name of the entry point
 * @returns:    Returns a value back to asm caller
 *
 * @func is called from ASM entry code.
 *
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 */
#define DEFINE_INTERRUPT_HANDLER_RET(func)                              \
static __always_inline long ____##func(struct pt_regs *regs);           \
                                                                        \
interrupt_handler long func(struct pt_regs *regs)                       \
{                                                                       \
        long ret;                                                       \
                                                                        \
        interrupt_enter_prepare(regs);                                  \
                                                                        \
        ret = ____##func (regs);                                        \
                                                                        \
        interrupt_exit_prepare(regs);                                   \
                                                                        \
        return ret;                                                     \
}                                                                       \
NOKPROBE_SYMBOL(func);                                                  \
                                                                        \
static __always_inline long ____##func(struct pt_regs *regs)

/**
 * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
 * @func:       Function name of the entry point
 */
#define DECLARE_INTERRUPT_HANDLER_ASYNC(func)                           \
        __visible void func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
 * @func:       Function name of the entry point
 *
 * @func is called from ASM entry code.
 *
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 */
#define DEFINE_INTERRUPT_HANDLER_ASYNC(func)                            \
static __always_inline void ____##func(struct pt_regs *regs);           \
                                                                        \
interrupt_handler void func(struct pt_regs *regs)                       \
{                                                                       \
        interrupt_async_enter_prepare(regs);                            \
                                                                        \
        ____##func (regs);                                              \
                                                                        \
        interrupt_async_exit_prepare(regs);                             \
}                                                                       \
NOKPROBE_SYMBOL(func);                                                  \
                                                                        \
static __always_inline void ____##func(struct pt_regs *regs)

/**
 * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
 * @func:       Function name of the entry point
 * @returns:    Returns a value back to asm caller
 */
#define DECLARE_INTERRUPT_HANDLER_NMI(func)                             \
        __visible long func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
 * @func:       Function name of the entry point
 * @returns:    Returns a value back to asm caller
 *
 * @func is called from ASM entry code.
 *
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 */
#define DEFINE_INTERRUPT_HANDLER_NMI(func)                              \
static __always_inline __no_sanitize_address __no_kcsan long            \
____##func(struct pt_regs *regs);                                       \
                                                                        \
interrupt_handler long func(struct pt_regs *regs)                       \
{                                                                       \
        struct interrupt_nmi_state state;                               \
        long ret;                                                       \
                                                                        \
        interrupt_nmi_enter_prepare(regs, &state);                      \
                                                                        \
        ret = ____##func (regs);                                        \
                                                                        \
        interrupt_nmi_exit_prepare(regs, &state);                       \
                                                                        \
        return ret;                                                     \
}                                                                       \
NOKPROBE_SYMBOL(func);                                                  \
                                                                        \
static __always_inline  __no_sanitize_address __no_kcsan long           \
____##func(struct pt_regs *regs)


/* Interrupt handlers */
/* kernel/traps.c */
DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
#ifdef CONFIG_PPC_BOOK3S_64
DECLARE_INTERRUPT_HANDLER_RAW(machine_check_early_boot);
DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async);
#endif
DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
DECLARE_INTERRUPT_HANDLER(SMIException);
DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
DECLARE_INTERRUPT_HANDLER(unknown_exception);
DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
DECLARE_INTERRUPT_HANDLER(RunModeException);
DECLARE_INTERRUPT_HANDLER(single_step_exception);
DECLARE_INTERRUPT_HANDLER(program_check_exception);
DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
DECLARE_INTERRUPT_HANDLER(alignment_exception);
DECLARE_INTERRUPT_HANDLER(StackOverflow);
DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
DECLARE_INTERRUPT_HANDLER(DebugException);
DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
DECLARE_INTERRUPT_HANDLER(CacheLockingException);
DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);

/* slb.c */
DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt);

/* hash_utils.c */
DECLARE_INTERRUPT_HANDLER(do_hash_fault);

/* fault.c */
DECLARE_INTERRUPT_HANDLER(do_page_fault);
DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);

/* process.c */
DECLARE_INTERRUPT_HANDLER(do_break);

/* time.c */
DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);

/* mce.c */
DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);

DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);

/* irq.c */
DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);

void __noreturn unrecoverable_exception(struct pt_regs *regs);

void replay_system_reset(void);
void replay_soft_interrupts(void);

static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
{
        if (!arch_irq_disabled_regs(regs))
                local_irq_enable();
}

long system_call_exception(struct pt_regs *regs, unsigned long r0);
notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
#ifdef CONFIG_PPC64
unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
#endif

#endif /* __ASSEMBLER__ */

#endif /* _ASM_POWERPC_INTERRUPT_H */