path: root/extras/mini-os/include/hypervisor.h

/******************************************************************************
 * hypervisor.h
 * 
 * Hypervisor handling.
 * 
 * TODO - x86_64 broken!
 *
 * Copyright (c) 2002, K A Fraser
 * Copyright (c) 2005, Grzegorz Milos
 */

#ifndef _HYPERVISOR_H_
#define _HYPERVISOR_H_

#include <types.h>
#include <xen/xen.h>
#include <xen/dom0_ops.h>

/*
 * a placeholder for the start of day information passed up from the hypervisor
 */
union start_info_union
{
    start_info_t start_info;
    char padding[512];
};
extern union start_info_union start_info_union;
#define start_info (start_info_union.start_info)


/* hypervisor.c */
//void do_hypervisor_callback(struct pt_regs *regs);
void mask_evtchn(u32 port);
void unmask_evtchn(u32 port);
void clear_evtchn(u32 port);

/*
 * Assembler stubs for hyper-calls.
 */
#if defined(__i386__)
/* Taken from Linux */

#ifndef __HYPERCALL_H__
#define __HYPERCALL_H__

#include <xen/sched.h>

#define _hypercall0(type, name)			\
({						\
	long __res;				\
	asm volatile (				\
		TRAP_INSTR			\
		: "=a" (__res)			\
		: "0" (__HYPERVISOR_##name)	\
		: "memory" );			\
	(type)__res;				\
})

#define _hypercall1(type, name, a1)				\
({								\
	long __res, __ign1;					\
	asm volatile (						\
		TRAP_INSTR					\
		: "=a" (__res), "=b" (__ign1)			\
		: "0" (__HYPERVISOR_##name), "1" ((long)(a1))	\
		: "memory" );					\
	(type)__res;						\
})

#define _hypercall2(type, name, a1, a2)				\
({								\
	long __res, __ign1, __ign2;				\
	asm volatile (						\
		TRAP_INSTR					\
		: "=a" (__res), "=b" (__ign1), "=c" (__ign2)	\
		: "0" (__HYPERVISOR_##name), "1" ((long)(a1)),	\
		"2" ((long)(a2))				\
		: "memory" );					\
	(type)__res;						\
})

#define _hypercall3(type, name, a1, a2, a3)			\
({								\
	long __res, __ign1, __ign2, __ign3;			\
	asm volatile (						\
		TRAP_INSTR					\
		: "=a" (__res), "=b" (__ign1), "=c" (__ign2), 	\
		"=d" (__ign3)					\
		: "0" (__HYPERVISOR_##name), "1" ((long)(a1)),	\
		"2" ((long)(a2)), "3" ((long)(a3))		\
		: "memory" );					\
	(type)__res;						\
})

#define _hypercall4(type, name, a1, a2, a3, a4)			\
({								\
	long __res, __ign1, __ign2, __ign3, __ign4;		\
	asm volatile (						\
		TRAP_INSTR					\
		: "=a" (__res), "=b" (__ign1), "=c" (__ign2),	\
		"=d" (__ign3), "=S" (__ign4)			\
		: "0" (__HYPERVISOR_##name), "1" ((long)(a1)),	\
		"2" ((long)(a2)), "3" ((long)(a3)),		\
		"4" ((long)(a4))				\
		: "memory" );					\
	(type)__res;						\
})

#define _hypercall5(type, name, a1, a2, a3, a4, a5)		\
({								\
	long __res, __ign1, __ign2, __ign3, __ign4, __ign5;	\
	asm volatile (						\
		TRAP_INSTR					\
		: "=a" (__res), "=b" (__ign1), "=c" (__ign2),	\
		"=d" (__ign3), "=S" (__ign4), "=D" (__ign5)	\
		: "0" (__HYPERVISOR_##name), "1" ((long)(a1)),	\
		"2" ((long)(a2)), "3" ((long)(a3)),		\
		"4" ((long)(a4)), "5" ((long)(a5))		\
		: "memory" );					\
	(type)__res;						\
})

static inline int
HYPERVISOR_set_trap_table(
	trap_info_t *table)
{
	return _hypercall1(int, set_trap_table, table);
}

static inline int
HYPERVISOR_mmu_update(
	mmu_update_t *req, int count, int *success_count, domid_t domid)
{
	return _hypercall4(int, mmu_update, req, count, success_count, domid);
}

static inline int
HYPERVISOR_mmuext_op(
	struct mmuext_op *op, int count, int *success_count, domid_t domid)
{
	return _hypercall4(int, mmuext_op, op, count, success_count, domid);
}

static inline int
HYPERVISOR_set_gdt(
	unsigned long *frame_list, int entries)
{
	return _hypercall2(int, set_gdt, frame_list, entries);
}

static inline int
HYPERVISOR_stack_switch(
	unsigned long ss, unsigned long esp)
{
	return _hypercall2(int, stack_switch, ss, esp);
}

static inline int
HYPERVISOR_set_callbacks(
	unsigned long event_selector, unsigned long event_address,
	unsigned long failsafe_selector, unsigned long failsafe_address)
{
	return _hypercall4(int, set_callbacks,
			   event_selector, event_address,
			   failsafe_selector, failsafe_address);
}

static inline int
HYPERVISOR_fpu_taskswitch(
	int set)
{
	return _hypercall1(int, fpu_taskswitch, set);
}

static inline int
HYPERVISOR_sched_op(
	int cmd, unsigned long arg)
{
	return _hypercall2(int, sched_op, cmd, arg);
}

static inline long
HYPERVISOR_set_timer_op(
	u64 timeout)
{
	unsigned long timeout_hi = (unsigned long)(timeout>>32);
	unsigned long timeout_lo = (unsigned long)timeout;
	return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
}

static inline int
HYPERVISOR_dom0_op(
	dom0_op_t *dom0_op)
{
	dom0_op->interface_version = DOM0_INTERFACE_VERSION;
	return _hypercall1(int, dom0_op, dom0_op);
}

static inline int
HYPERVISOR_set_debugreg(
	int reg, unsigned long value)
{
	return _hypercall2(int, set_debugreg, reg, value);
}

static inline unsigned long
HYPERVISOR_get_debugreg(
	int reg)
{
	return _hypercall1(unsigned long, get_debugreg, reg);
}

static inline int
HYPERVISOR_update_descriptor(
	u64 ma, u64 desc)
{
	return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
}

static inline int
HYPERVISOR_memory_op(
	unsigned int cmd, void *arg)
{
	return _hypercall2(int, memory_op, cmd, arg);
}

static inline int
HYPERVISOR_multicall(
	void *call_list, int nr_calls)
{
	return _hypercall2(int, multicall, call_list, nr_calls);
}

static inline int
HYPERVISOR_update_va_mapping(
	unsigned long va, pte_t new_val, unsigned long flags)
{
	unsigned long pte_hi = 0;
#ifdef CONFIG_X86_PAE
	pte_hi = new_val.pte_high;
#endif
	return _hypercall4(int, update_va_mapping, va,
			   new_val.pte_low, pte_hi, flags);
}

static inline int
HYPERVISOR_event_channel_op(
	void *op)
{
	return _hypercall1(int, event_channel_op, op);
}

static inline int
HYPERVISOR_xen_version(
	int cmd, void *arg)
{
	return _hypercall2(int, xen_version, cmd, arg);
}

static inline int
HYPERVISOR_console_io(
	int cmd, int count, char *str)
{
	return _hypercall3(int, console_io, cmd, count, str);
}

static inline int
HYPERVISOR_physdev_op(
	void *physdev_op)
{
	return _hypercall1(int, physdev_op, physdev_op);
}

static inline int
HYPERVISOR_grant_table_op(
	unsigned int cmd, void *uop, unsigned int count)
{
	return _hypercall3(int, grant_table_op, cmd, uop, count);
}

static inline int
HYPERVISOR_update_va_mapping_otherdomain(
	unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
{
	unsigned long pte_hi = 0;
#ifdef CONFIG_X86_PAE
	pte_hi = new_val.pte_high;
#endif
	return _hypercall5(int, update_va_mapping_otherdomain, va,
			   new_val.pte_low, pte_hi, flags, domid);
}

static inline int
HYPERVISOR_vm_assist(
	unsigned int cmd, unsigned int type)
{
	return _hypercall2(int, vm_assist, cmd, type);
}

static inline int
HYPERVISOR_vcpu_op(
	int cmd, int vcpuid, void *extra_args)
{
	return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
}

static inline int
HYPERVISOR_suspend(
	unsigned long srec)
{
	return _hypercall3(int, sched_op, SCHEDOP_shutdown,
			   SHUTDOWN_suspend, srec);
}

#endif /* __HYPERCALL_H__ */
#elif defined(__x86_64__)

#define __syscall_clobber "r11","rcx","memory"

/*
 * Assembler stubs for hyper-calls.
 */
static inline int
HYPERVISOR_set_trap_table(
    trap_info_t *table)
{
    int ret;

    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_set_trap_table), "D" (table)
	: __syscall_clobber );

    return ret;
}

static inline int
HYPERVISOR_mmu_update(
    mmu_update_t *req, int count, int *success_count, domid_t domid)
{
    int ret;

    __asm__ __volatile__ (
        "movq %5, %%r10;" TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_mmu_update), "D" (req), "S" ((long)count),
	  "d" (success_count), "g" ((unsigned long)domid)
	: __syscall_clobber, "r10" );

    return ret;
}

static inline int
HYPERVISOR_mmuext_op(
    struct mmuext_op *op, int count, int *success_count, domid_t domid)
{
    int ret;

    __asm__ __volatile__ (
        "movq %5, %%r10;" TRAP_INSTR
        : "=a" (ret)
        : "0" (__HYPERVISOR_mmuext_op), "D" (op), "S" ((long)count), 
          "d" (success_count), "g" ((unsigned long)domid)
        : __syscall_clobber, "r10" );

    return ret;
}

static inline int
HYPERVISOR_set_gdt(
    unsigned long *frame_list, int entries)
{
    int ret;

    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_set_gdt), "D" (frame_list), "S" ((long)entries)
	: __syscall_clobber );


    return ret;
}
static inline int
HYPERVISOR_stack_switch(
    unsigned long ss, unsigned long esp)
{
    int ret;

    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_stack_switch), "D" (ss), "S" (esp)
	: __syscall_clobber );

    return ret;
}

static inline int
HYPERVISOR_set_callbacks(
    unsigned long event_address, unsigned long failsafe_address, 
    unsigned long syscall_address)
{
    int ret;

    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_set_callbacks), "D" (event_address),
	  "S" (failsafe_address), "d" (syscall_address)
	: __syscall_clobber );

    return ret;
}

static inline int
HYPERVISOR_fpu_taskswitch(
    int set)
{
    int ret;
    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret) : "0" ((unsigned long)__HYPERVISOR_fpu_taskswitch),
          "D" ((unsigned long) set) : __syscall_clobber );

    return ret;
}

static inline int
HYPERVISOR_yield(
    void)
{
    int ret;

    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_sched_op), "D" ((unsigned long)SCHEDOP_yield)
	: __syscall_clobber );

    return ret;
}

static inline int
HYPERVISOR_block(
    void)
{
    int ret;
    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_sched_op), "D" ((unsigned long)SCHEDOP_block)
	: __syscall_clobber );

    return ret;
}

static inline int
HYPERVISOR_shutdown(
    void)
{
    int ret;
    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_sched_op),
	  "D" ((unsigned long)(SCHEDOP_shutdown | (SHUTDOWN_poweroff << SCHEDOP_reasonshift)))
	: __syscall_clobber );

    return ret;
}

static inline int
HYPERVISOR_reboot(
    void)
{
    int ret;

    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_sched_op),
	  "D" ((unsigned long)(SCHEDOP_shutdown | (SHUTDOWN_reboot << SCHEDOP_reasonshift)))
	: __syscall_clobber );

    return ret;
}

static inline int
HYPERVISOR_suspend(
    unsigned long srec)
{
    int ret;

    /* NB. On suspend, control software expects a suspend record in %esi. */
    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_sched_op),
        "D" ((unsigned long)(SCHEDOP_shutdown | (SHUTDOWN_suspend << SCHEDOP_reasonshift))), 
        "S" (srec)
	: __syscall_clobber );

    return ret;
}

/*
 * We can have the timeout value in a single argument for the hypercall, but
 * that will break the common code. 
 */
static inline long
HYPERVISOR_set_timer_op(
    u64 timeout)
{
    int ret;

    __asm__ __volatile__ (
        TRAP_INSTR
        : "=a" (ret)
	: "0" ((unsigned long)__HYPERVISOR_set_timer_op),
	  "D" (timeout)
	: __syscall_clobber );

    return ret;
}
#endif

#endif /* __HYPERVISOR_H__ */