[apple/xnu.git] / osfmk / i386 / pal_routines.c

/*
 * Copyright (c) 2009-2010 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

/*
 * file: pal_routines.c
 *       Platform Abstraction Layer routines for bare-metal i386 and x86_64
 */


#include <kern/kern_types.h>
#include <mach/mach_types.h>
#include <kern/thread.h>
#include <kern/simple_lock.h>

#include <sys/kdebug.h>
#include <machine/pal_routines.h>
#include <i386/serial_io.h>
#include <i386/lapic.h>
#include <i386/proc_reg.h>
#include <i386/misc_protos.h>
#include <i386/machine_routines.h>
#include <i386/pmap.h>

//#define PAL_DEBUG 1
#ifdef PAL_DEBUG
#define DBG(x...)       kprintf("PAL_DBG: " x)
#else
#define DBG(x...)
#endif /* PAL_DEBUG */

extern void *gPEEFIRuntimeServices;
extern void *gPEEFISystemTable;

/* nanotime conversion information */
pal_rtc_nanotime_t pal_rtc_nanotime_info = {0, 0, 0, 0, 1, 0};

/* APIC kext may use this to access xnu internal state */
struct pal_apic_table *apic_table = NULL;

decl_simple_lock_data(static, pal_efi_lock);
#ifdef __x86_64__
static pml4_entry_t IDPML4[PTE_PER_PAGE] __attribute__ ((aligned(4096)));
uint64_t        pal_efi_saved_cr0;
uint64_t        pal_efi_saved_cr3;
#endif


/* Serial routines */
int
pal_serial_init(void)
{
	return serial_init();
}

void
pal_serial_putc_nocr(char c)
{
	serial_putc(c);
}

void
pal_serial_putc(char c)
{
	serial_putc(c);
	if (c == '\n') {
		serial_putc('\r');
	}
}

int
pal_serial_getc(void)
{
	return serial_getc();
}


/* Generic routines */
void
pal_i386_init(void)
{
	simple_lock_init(&pal_efi_lock, 0);
}

void
pal_get_control_registers( pal_cr_t *cr0, pal_cr_t *cr2,
    pal_cr_t *cr3, pal_cr_t *cr4 )
{
	*cr0 = get_cr0();
	*cr2 = get_cr2();
	*cr3 = get_cr3_raw();
	*cr4 = get_cr4();
}


/*
 * define functions below here to ensure we have symbols for these,
 * even though they're not used on this platform.
 */
#undef pal_dbg_page_fault
void
pal_dbg_page_fault( thread_t thread __unused,
    user_addr_t vaddr __unused,
    kern_return_t kr __unused )
{
}

#undef pal_dbg_set_task_name
void
pal_dbg_set_task_name( task_t task __unused )
{
}

#undef pal_set_signal_delivery
void
pal_set_signal_delivery(thread_t thread __unused)
{
}

/* EFI thunks */
extern void
_pal_efi_call_in_64bit_mode_asm(uint64_t func,
    struct pal_efi_registers *efi_reg,
    void *stack_contents,
    size_t stack_contents_size);

kern_return_t
pal_efi_call_in_64bit_mode(uint64_t func,
    struct pal_efi_registers *efi_reg,
    void *stack_contents,
    size_t stack_contents_size,                        /* 16-byte multiple */
    uint64_t *efi_status)
{
	DBG("pal_efi_call_in_64bit_mode(0x%016llx, %p, %p, %lu, %p)\n",
	    func, efi_reg, stack_contents, stack_contents_size, efi_status);

	if (func == 0) {
		return KERN_INVALID_ADDRESS;
	}

	if ((efi_reg == NULL)
	    || (stack_contents == NULL)
	    || (stack_contents_size % 16 != 0)) {
		return KERN_INVALID_ARGUMENT;
	}

	if (!gPEEFISystemTable || !gPEEFIRuntimeServices) {
		return KERN_NOT_SUPPORTED;
	}

	if (func < VM_MIN_KERNEL_ADDRESS) {
		/*
		 * EFI Runtime Services must be mapped in our address
		 * space at an appropriate location.
		 */
		return KERN_INVALID_ADDRESS;
	}

	_pal_efi_call_in_64bit_mode_asm(func,
	    efi_reg,
	    stack_contents,
	    stack_contents_size);

	*efi_status = efi_reg->rax;

	return KERN_SUCCESS;
}

extern void
_pal_efi_call_in_32bit_mode_asm(uint32_t func,
    struct pal_efi_registers *efi_reg,
    void *stack_contents,
    size_t stack_contents_size);

kern_return_t
pal_efi_call_in_32bit_mode(uint32_t func,
    struct pal_efi_registers *efi_reg,
    void *stack_contents,
    size_t stack_contents_size,                        /* 16-byte multiple */
    uint32_t *efi_status)
{
	DBG("pal_efi_call_in_32bit_mode(0x%08x, %p, %p, %lu, %p)\n",
	    func, efi_reg, stack_contents, stack_contents_size, efi_status);

	if (func == 0) {
		return KERN_INVALID_ADDRESS;
	}

	if ((efi_reg == NULL)
	    || (stack_contents == NULL)
	    || (stack_contents_size % 16 != 0)) {
		return KERN_INVALID_ARGUMENT;
	}

	if (!gPEEFISystemTable || !gPEEFIRuntimeServices) {
		return KERN_NOT_SUPPORTED;
	}

	DBG("pal_efi_call_in_32bit_mode() efi_reg:\n");
	DBG("  rcx: 0x%016llx\n", efi_reg->rcx);
	DBG("  rdx: 0x%016llx\n", efi_reg->rdx);
	DBG("   r8: 0x%016llx\n", efi_reg->r8);
	DBG("   r9: 0x%016llx\n", efi_reg->r9);
	DBG("  rax: 0x%016llx\n", efi_reg->rax);

	DBG("pal_efi_call_in_32bit_mode() stack:\n");
#if PAL_DEBUG
	size_t i;
	for (i = 0; i < stack_contents_size; i += sizeof(uint32_t)) {
		uint32_t *p = (uint32_t *) ((uintptr_t)stack_contents + i);
		DBG("  %p: 0x%08x\n", p, *p);
	}
#endif

#ifdef __x86_64__
	/*
	 * Ensure no interruptions.
	 * Taking a spinlock for serialization is technically unnecessary
	 * because the EFIRuntime kext should serialize.
	 */
	boolean_t istate = ml_set_interrupts_enabled(FALSE);
	simple_lock(&pal_efi_lock, LCK_GRP_NULL);

	/*
	 * Switch to special page tables with the entire high kernel space
	 * double-mapped into the bottom 4GB.
	 *
	 * NB: We assume that all data passed exchanged with RuntimeServices is
	 * located in the 4GB of KVA based at VM_MIN_ADDRESS. In particular, kexts
	 * loaded the basement (below VM_MIN_ADDRESS) cannot pass static data.
	 * Kernel stack and heap space is OK.
	 */
	MARK_CPU_IDLE(cpu_number());
	pal_efi_saved_cr3 = get_cr3_raw();
	pal_efi_saved_cr0 = get_cr0();
	IDPML4[KERNEL_PML4_INDEX] = IdlePML4[KERNEL_PML4_INDEX];
	IDPML4[0]                 = IdlePML4[KERNEL_PML4_INDEX];
	clear_ts();
	set_cr3_raw((uint64_t) ID_MAP_VTOP(IDPML4));

	swapgs();               /* Save kernel's GS base */

	/* Set segment state ready for compatibility mode */
	set_gs(NULL_SEG);
	set_fs(NULL_SEG);
	set_es(KERNEL_DS);
	set_ds(KERNEL_DS);
	set_ss(KERNEL_DS);

	_pal_efi_call_in_32bit_mode_asm(func,
	    efi_reg,
	    stack_contents,
	    stack_contents_size);

	/* Restore NULL segment state */
	set_ss(NULL_SEG);
	set_es(NULL_SEG);
	set_ds(NULL_SEG);

	swapgs();               /* Restore kernel's GS base */

	/* Restore the 64-bit user GS base we just destroyed */
	wrmsr64(MSR_IA32_KERNEL_GS_BASE,
	    current_cpu_datap()->cpu_uber.cu_user_gs_base);

	/* End of mapping games */
	set_cr3_raw(pal_efi_saved_cr3);
	set_cr0(pal_efi_saved_cr0);
	MARK_CPU_ACTIVE(cpu_number());

	simple_unlock(&pal_efi_lock);
	ml_set_interrupts_enabled(istate);
#else
	_pal_efi_call_in_32bit_mode_asm(func,
	    efi_reg,
	    stack_contents,
	    stack_contents_size);
#endif

	*efi_status = (uint32_t)efi_reg->rax;
	DBG("pal_efi_call_in_32bit_mode() efi_status: 0x%x\n", *efi_status);

	return KERN_SUCCESS;
}

/* wind-back a syscall instruction */
void
pal_syscall_restart(thread_t thread __unused, x86_saved_state_t *state)
{
	/* work out which flavour thread it is */
	if (is_saved_state32(state)) {
		x86_saved_state32_t     *regs32;
		regs32 = saved_state32(state);

		if (regs32->cs == SYSENTER_CS || regs32->cs == SYSENTER_TF_CS) {
			regs32->eip -= 5;
		} else {
			regs32->eip -= 2;
		}
	} else {
		x86_saved_state64_t     *regs64;

		assert( is_saved_state64(state));
		regs64 = saved_state64(state);

		/* Only one instruction for 64-bit threads */
		regs64->isf.rip -= 2;
	}
}

/* Helper function to put the machine to sleep (or shutdown) */

boolean_t
pal_machine_sleep(uint8_t type_a __unused, uint8_t type_b __unused, uint32_t bit_position __unused,
    uint32_t disable_mask __unused, uint32_t enable_mask __unused)
{
	return 0;
}


/* shouldn't be used on native */
void
pal_get_kern_regs( x86_saved_state_t *state )
{
	panic( "pal_get_kern_regs called. state %p\n", state );
}

void
pal_preemption_assert(void)
{
}
Commit	Line	Data
6d2010ae A	1	/*
	2	* Copyright (c) 2009-2010 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
0a7de745	5	*
6d2010ae A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
0a7de745	14	*
6d2010ae A	15	* Please obtain a copy of the License at
6d2010ae A	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
0a7de745	17	*
6d2010ae A	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
0a7de745	25	*
6d2010ae A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	/*
	30	* file: pal_routines.c
	31	* Platform Abstraction Layer routines for bare-metal i386 and x86_64
	32	*/
	33
	34
	35	#include <kern/kern_types.h>
	36	#include <mach/mach_types.h>
	37	#include <kern/thread.h>
	38	#include <kern/simple_lock.h>
	39
	40	#include <sys/kdebug.h>
	41	#include <machine/pal_routines.h>
	42	#include <i386/serial_io.h>
	43	#include <i386/lapic.h>
	44	#include <i386/proc_reg.h>
	45	#include <i386/misc_protos.h>
	46	#include <i386/machine_routines.h>
	47	#include <i386/pmap.h>
	48
	49	//#define PAL_DEBUG 1
	50	#ifdef PAL_DEBUG
	51	#define DBG(x...) kprintf("PAL_DBG: " x)
	52	#else
	53	#define DBG(x...)
	54	#endif /* PAL_DEBUG */
	55
	56	extern void *gPEEFIRuntimeServices;
	57	extern void *gPEEFISystemTable;
	58
	59	/* nanotime conversion information */
0a7de745	60	pal_rtc_nanotime_t pal_rtc_nanotime_info = {0, 0, 0, 0, 1, 0};
6d2010ae A	61
	62	/* APIC kext may use this to access xnu internal state */
	63	struct pal_apic_table *apic_table = NULL;
	64
0a7de745	65	decl_simple_lock_data(static, pal_efi_lock);
6d2010ae	66	#ifdef __x86_64__
0a7de745 A	67	static pml4_entry_t IDPML4[PTE_PER_PAGE] __attribute__ ((aligned(4096)));
	68	uint64_t pal_efi_saved_cr0;
	69	uint64_t pal_efi_saved_cr3;
6d2010ae A	70	#endif
	71
	72
	73	/* Serial routines */
	74	int
	75	pal_serial_init(void)
	76	{
	77	return serial_init();
	78	}
	79
39037602 A	80	void
	81	pal_serial_putc_nocr(char c)
	82	{
	83	serial_putc(c);
	84	}
	85
6d2010ae A	86	void
	87	pal_serial_putc(char c)
	88	{
	89	serial_putc(c);
0a7de745	90	if (c == '\n') {
39037602	91	serial_putc('\r');
0a7de745	92	}
6d2010ae A	93	}
	94
	95	int
	96	pal_serial_getc(void)
	97	{
	98	return serial_getc();
	99	}
	100
	101
	102	/* Generic routines */
	103	void
	104	pal_i386_init(void)
	105	{
0a7de745	106	simple_lock_init(&pal_efi_lock, 0);
6d2010ae A	107	}
	108
	109	void
0a7de745 A	110	pal_get_control_registers( pal_cr_t cr0, pal_cr_t cr2,
0a7de745 A	111	pal_cr_t cr3, pal_cr_t cr4 )
6d2010ae A	112	{
	113	*cr0 = get_cr0();
	114	*cr2 = get_cr2();
	115	*cr3 = get_cr3_raw();
	116	*cr4 = get_cr4();
	117	}
	118
	119
	120	/*
	121	* define functions below here to ensure we have symbols for these,
	122	* even though they're not used on this platform.
	123	*/
	124	#undef pal_dbg_page_fault
	125	void
	126	pal_dbg_page_fault( thread_t thread __unused,
0a7de745 A	127	user_addr_t vaddr __unused,
0a7de745 A	128	kern_return_t kr __unused )
6d2010ae A	129	{
	130	}
	131
	132	#undef pal_dbg_set_task_name
	133	void
	134	pal_dbg_set_task_name( task_t task __unused )
	135	{
	136	}
	137
	138	#undef pal_set_signal_delivery
	139	void
	140	pal_set_signal_delivery(thread_t thread __unused)
	141	{
	142	}
	143
	144	/* EFI thunks */
	145	extern void
	146	_pal_efi_call_in_64bit_mode_asm(uint64_t func,
0a7de745 A	147	struct pal_efi_registers *efi_reg,
	148	void *stack_contents,
	149	size_t stack_contents_size);
6d2010ae A	150
	151	kern_return_t
	152	pal_efi_call_in_64bit_mode(uint64_t func,
0a7de745 A	153	struct pal_efi_registers *efi_reg,
	154	void *stack_contents,
	155	size_t stack_contents_size, /* 16-byte multiple */
	156	uint64_t *efi_status)
6d2010ae	157	{
0a7de745 A	158	DBG("pal_efi_call_in_64bit_mode(0x%016llx, %p, %p, %lu, %p)\n",
	159	func, efi_reg, stack_contents, stack_contents_size, efi_status);
	160
	161	if (func == 0) {
	162	return KERN_INVALID_ADDRESS;
	163	}
	164
	165	if ((efi_reg == NULL)
	166	\|\| (stack_contents == NULL)
	167	\|\| (stack_contents_size % 16 != 0)) {
	168	return KERN_INVALID_ARGUMENT;
	169	}
	170
	171	if (!gPEEFISystemTable \|\| !gPEEFIRuntimeServices) {
	172	return KERN_NOT_SUPPORTED;
	173	}
	174
	175	if (func < VM_MIN_KERNEL_ADDRESS) {
	176	/*
	177	* EFI Runtime Services must be mapped in our address
	178	* space at an appropriate location.
	179	*/
	180	return KERN_INVALID_ADDRESS;
	181	}
	182
	183	_pal_efi_call_in_64bit_mode_asm(func,
	184	efi_reg,
	185	stack_contents,
	186	stack_contents_size);
	187
	188	*efi_status = efi_reg->rax;
	189
	190	return KERN_SUCCESS;
6d2010ae A	191	}
	192
	193	extern void
	194	_pal_efi_call_in_32bit_mode_asm(uint32_t func,
0a7de745 A	195	struct pal_efi_registers *efi_reg,
	196	void *stack_contents,
	197	size_t stack_contents_size);
6d2010ae A	198
	199	kern_return_t
	200	pal_efi_call_in_32bit_mode(uint32_t func,
0a7de745 A	201	struct pal_efi_registers *efi_reg,
	202	void *stack_contents,
	203	size_t stack_contents_size, /* 16-byte multiple */
	204	uint32_t *efi_status)
6d2010ae	205	{
0a7de745 A	206	DBG("pal_efi_call_in_32bit_mode(0x%08x, %p, %p, %lu, %p)\n",
	207	func, efi_reg, stack_contents, stack_contents_size, efi_status);
	208
	209	if (func == 0) {
	210	return KERN_INVALID_ADDRESS;
	211	}
	212
	213	if ((efi_reg == NULL)
	214	\|\| (stack_contents == NULL)
	215	\|\| (stack_contents_size % 16 != 0)) {
	216	return KERN_INVALID_ARGUMENT;
	217	}
	218
	219	if (!gPEEFISystemTable \|\| !gPEEFIRuntimeServices) {
	220	return KERN_NOT_SUPPORTED;
	221	}
	222
	223	DBG("pal_efi_call_in_32bit_mode() efi_reg:\n");
	224	DBG(" rcx: 0x%016llx\n", efi_reg->rcx);
	225	DBG(" rdx: 0x%016llx\n", efi_reg->rdx);
	226	DBG(" r8: 0x%016llx\n", efi_reg->r8);
	227	DBG(" r9: 0x%016llx\n", efi_reg->r9);
	228	DBG(" rax: 0x%016llx\n", efi_reg->rax);
	229
	230	DBG("pal_efi_call_in_32bit_mode() stack:\n");
6d2010ae	231	#if PAL_DEBUG
0a7de745 A	232	size_t i;
	233	for (i = 0; i < stack_contents_size; i += sizeof(uint32_t)) {
	234	uint32_t p = (uint32_t ) ((uintptr_t)stack_contents + i);
	235	DBG(" %p: 0x%08x\n", p, *p);
	236	}
6d2010ae A	237	#endif
	238
	239	#ifdef __x86_64__
0a7de745 A	240	/*
	241	* Ensure no interruptions.
	242	* Taking a spinlock for serialization is technically unnecessary
	243	* because the EFIRuntime kext should serialize.
	244	*/
	245	boolean_t istate = ml_set_interrupts_enabled(FALSE);
	246	simple_lock(&pal_efi_lock, LCK_GRP_NULL);
	247
	248	/*
	249	* Switch to special page tables with the entire high kernel space
	250	* double-mapped into the bottom 4GB.
	251	*
	252	* NB: We assume that all data passed exchanged with RuntimeServices is
	253	* located in the 4GB of KVA based at VM_MIN_ADDRESS. In particular, kexts
	254	* loaded the basement (below VM_MIN_ADDRESS) cannot pass static data.
	255	* Kernel stack and heap space is OK.
	256	*/
	257	MARK_CPU_IDLE(cpu_number());
	258	pal_efi_saved_cr3 = get_cr3_raw();
	259	pal_efi_saved_cr0 = get_cr0();
	260	IDPML4[KERNEL_PML4_INDEX] = IdlePML4[KERNEL_PML4_INDEX];
	261	IDPML4[0] = IdlePML4[KERNEL_PML4_INDEX];
	262	clear_ts();
	263	set_cr3_raw((uint64_t) ID_MAP_VTOP(IDPML4));
	264
	265	swapgs(); /* Save kernel's GS base */
	266
	267	/* Set segment state ready for compatibility mode */
	268	set_gs(NULL_SEG);
	269	set_fs(NULL_SEG);
	270	set_es(KERNEL_DS);
	271	set_ds(KERNEL_DS);
	272	set_ss(KERNEL_DS);
	273
	274	_pal_efi_call_in_32bit_mode_asm(func,
	275	efi_reg,
	276	stack_contents,
	277	stack_contents_size);
	278
	279	/* Restore NULL segment state */
	280	set_ss(NULL_SEG);
	281	set_es(NULL_SEG);
	282	set_ds(NULL_SEG);
	283
	284	swapgs(); /* Restore kernel's GS base */
	285
	286	/* Restore the 64-bit user GS base we just destroyed */
	287	wrmsr64(MSR_IA32_KERNEL_GS_BASE,
6d2010ae A	288	current_cpu_datap()->cpu_uber.cu_user_gs_base);
6d2010ae A	289
0a7de745 A	290	/* End of mapping games */
	291	set_cr3_raw(pal_efi_saved_cr3);
	292	set_cr0(pal_efi_saved_cr0);
	293	MARK_CPU_ACTIVE(cpu_number());
	294
	295	simple_unlock(&pal_efi_lock);
	296	ml_set_interrupts_enabled(istate);
6d2010ae	297	#else
0a7de745 A	298	_pal_efi_call_in_32bit_mode_asm(func,
	299	efi_reg,
	300	stack_contents,
	301	stack_contents_size);
6d2010ae A	302	#endif
6d2010ae A	303
0a7de745 A	304	*efi_status = (uint32_t)efi_reg->rax;
0a7de745 A	305	DBG("pal_efi_call_in_32bit_mode() efi_status: 0x%x\n", *efi_status);
6d2010ae	306
0a7de745	307	return KERN_SUCCESS;
6d2010ae A	308	}
	309
	310	/* wind-back a syscall instruction */
	311	void
	312	pal_syscall_restart(thread_t thread __unused, x86_saved_state_t *state)
	313	{
	314	/* work out which flavour thread it is */
0a7de745 A	315	if (is_saved_state32(state)) {
0a7de745 A	316	x86_saved_state32_t *regs32;
6d2010ae A	317	regs32 = saved_state32(state);
6d2010ae A	318
0a7de745	319	if (regs32->cs == SYSENTER_CS \|\| regs32->cs == SYSENTER_TF_CS) {
6d2010ae	320	regs32->eip -= 5;
0a7de745	321	} else {
6d2010ae	322	regs32->eip -= 2;
0a7de745 A	323	}
	324	} else {
	325	x86_saved_state64_t *regs64;
6d2010ae	326
0a7de745	327	assert( is_saved_state64(state));
6d2010ae A	328	regs64 = saved_state64(state);
	329
	330	/* Only one instruction for 64-bit threads */
	331	regs64->isf.rip -= 2;
	332	}
6d2010ae A	333	}
	334
	335	/* Helper function to put the machine to sleep (or shutdown) */
	336
	337	boolean_t
0a7de745 A	338	pal_machine_sleep(uint8_t type_a __unused, uint8_t type_b __unused, uint32_t bit_position __unused,
0a7de745 A	339	uint32_t disable_mask __unused, uint32_t enable_mask __unused)
6d2010ae A	340	{
	341	return 0;
	342	}
	343
	344
	345	/* shouldn't be used on native */
	346	void
	347	pal_get_kern_regs( x86_saved_state_t *state )
	348	{
	349	panic( "pal_get_kern_regs called. state %p\n", state );
	350	}
	351
	352	void
	353	pal_preemption_assert(void)
	354	{
	355	}