[apple/xnu.git] / osfmk / ppc / machine_routines.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
#include <ppc/machine_routines.h>
#include <ppc/machine_cpu.h>
#include <ppc/exception.h>
#include <ppc/misc_protos.h>
#include <ppc/Firmware.h>
#include <vm/vm_page.h>
#include <ppc/pmap.h>
#include <ppc/proc_reg.h>
#include <kern/processor.h>

boolean_t get_interrupts_enabled(void);

/* Map memory map IO space */
vm_offset_t 
ml_io_map(
	vm_offset_t phys_addr, 
	vm_size_t size)
{
	return(io_map(phys_addr,size));
}

/* static memory allocation */
vm_offset_t 
ml_static_malloc(
	vm_size_t size)
{
	extern vm_offset_t static_memory_end;
	extern boolean_t pmap_initialized;
	vm_offset_t vaddr;

	if (pmap_initialized)
		return((vm_offset_t)NULL);
	else {
		vaddr = static_memory_end;
		static_memory_end = round_page(vaddr+size);
		return(vaddr);
	}
}

vm_offset_t
ml_static_ptovirt(
	vm_offset_t paddr)
{
	extern vm_offset_t static_memory_end;
	vm_offset_t vaddr;

	/* Static memory is map V=R */
	vaddr = paddr;
	if ( (vaddr < static_memory_end) && (pmap_extract(kernel_pmap, vaddr)==paddr) )
		return(vaddr);
	else
		return((vm_offset_t)NULL);
}

void
ml_static_mfree(
	vm_offset_t vaddr,
	vm_size_t size)
{
	vm_offset_t paddr_cur, vaddr_cur;

	for (vaddr_cur = round_page(vaddr);
	     vaddr_cur < trunc_page(vaddr+size);
	     vaddr_cur += PAGE_SIZE) {
		paddr_cur = pmap_extract(kernel_pmap, vaddr_cur);
		if (paddr_cur != (vm_offset_t)NULL) {
			vm_page_wire_count--;
			pmap_remove(kernel_pmap, vaddr_cur, vaddr_cur+PAGE_SIZE);
			vm_page_create(paddr_cur,paddr_cur+PAGE_SIZE);
		}
	}
}

/* virtual to physical on wired pages */
vm_offset_t ml_vtophys(
	vm_offset_t vaddr)
{
	return(pmap_extract(kernel_pmap, vaddr));
}

/* Initialize Interrupt Handler */
void ml_install_interrupt_handler(
	void *nub,
	int source,
	void *target,
	IOInterruptHandler handler,
	void *refCon)
{
	int	current_cpu;
	boolean_t current_state;

	current_cpu = cpu_number();
	current_state = ml_get_interrupts_enabled();

	per_proc_info[current_cpu].interrupt_nub     = nub;
	per_proc_info[current_cpu].interrupt_source  = source;
	per_proc_info[current_cpu].interrupt_target  = target;
	per_proc_info[current_cpu].interrupt_handler = handler;
	per_proc_info[current_cpu].interrupt_refCon  = refCon;

	per_proc_info[current_cpu].interrupts_enabled = TRUE;  
	(void) ml_set_interrupts_enabled(current_state);
}

/* Initialize Interrupts */
void ml_init_interrupt(void)
{
	int	current_cpu;
	boolean_t current_state;

	current_state = ml_get_interrupts_enabled();

	current_cpu = cpu_number();
	per_proc_info[current_cpu].interrupts_enabled = TRUE;  
	(void) ml_set_interrupts_enabled(current_state);
}

boolean_t fake_get_interrupts_enabled(void)
{
	/*
	 * The scheduler is not active on this cpu. There is no need to disable 
	 * preemption. The current thread wont be dispatched on anhother cpu.
	 */
	return((per_proc_info[cpu_number()].cpu_flags & turnEEon) != 0);
}

boolean_t fake_set_interrupts_enabled(boolean_t enable)
{
	boolean_t interrupt_state_prev;

	/*
	 * The scheduler is not active on this cpu. There is no need to disable 
	 * preemption. The current thread wont be dispatched on anhother cpu.
	 */
	interrupt_state_prev = 
		(per_proc_info[cpu_number()].cpu_flags & turnEEon) != 0;
	if (interrupt_state_prev != enable)
		per_proc_info[cpu_number()].cpu_flags ^= turnEEon;
	return(interrupt_state_prev);
}

/* Get Interrupts Enabled */
boolean_t ml_get_interrupts_enabled(void)
{
	if (per_proc_info[cpu_number()].interrupts_enabled == TRUE)
		return(get_interrupts_enabled());
	else
		return(fake_get_interrupts_enabled());
}

boolean_t get_interrupts_enabled(void)
{
	return((mfmsr() & MASK(MSR_EE)) != 0);
}

/* Check if running at interrupt context */
boolean_t ml_at_interrupt_context(void)
{
	boolean_t	ret;
	boolean_t	current_state;

	current_state = ml_set_interrupts_enabled(FALSE);
 	ret = (per_proc_info[cpu_number()].istackptr == 0);	
	ml_set_interrupts_enabled(current_state);
	return(ret);
}

/* Generate a fake interrupt */
void ml_cause_interrupt(void)
{
	CreateFakeIO();
}

void machine_idle(void)
{
        if (per_proc_info[cpu_number()].interrupts_enabled == TRUE) {
	        int cur_decr;

	        machine_idle_ppc();

		/*
		 * protect against a lost decrementer trap
		 * if the current decrementer value is negative
		 * by more than 10 ticks, re-arm it since it's 
		 * unlikely to fire at this point... a hardware
		 * interrupt got us out of machine_idle and may
		 * also be contributing to this state
		 */
		cur_decr = isync_mfdec();

		if (cur_decr < -10) {
		        mtdec(1);
		}
	}
}

void
machine_signal_idle(
	processor_t processor)
{
	(void)cpu_signal(processor->slot_num, SIGPwake, 0, 0);
}

kern_return_t
ml_processor_register(
	ml_processor_info_t *processor_info,
	processor_t	    *processor,
	ipi_handler_t       *ipi_handler)
{
	kern_return_t ret;
	int target_cpu;

	if (processor_info->boot_cpu == FALSE) {
		 if (cpu_register(&target_cpu) != KERN_SUCCESS)
			return KERN_FAILURE;
	} else {
		/* boot_cpu is always 0 */
		target_cpu= 0;
	}

	per_proc_info[target_cpu].cpu_id = processor_info->cpu_id;
	per_proc_info[target_cpu].start_paddr = processor_info->start_paddr;

	if(per_proc_info[target_cpu].pf.Available & pfCanNap)
	  if(processor_info->supports_nap) 
		per_proc_info[target_cpu].pf.Available |= pfWillNap;

	if(processor_info->time_base_enable !=  (void(*)(cpu_id_t, boolean_t ))NULL)
		per_proc_info[target_cpu].time_base_enable = processor_info->time_base_enable;
	else
		per_proc_info[target_cpu].time_base_enable = (void(*)(cpu_id_t, boolean_t ))NULL;
	
	if(target_cpu == cpu_number()) 
		__asm__ volatile("mtsprg 2,%0" : : "r" (per_proc_info[target_cpu].pf.Available));	/* Set live value */

	*processor = cpu_to_processor(target_cpu);
	*ipi_handler = cpu_signal_handler;

	return KERN_SUCCESS;
}

boolean_t
ml_enable_nap(int target_cpu, boolean_t nap_enabled)
{
    boolean_t prev_value = (per_proc_info[target_cpu].pf.Available & pfCanNap) && (per_proc_info[target_cpu].pf.Available & pfWillNap);
    
 	if(per_proc_info[target_cpu].pf.Available & pfCanNap) {				/* Can the processor nap? */
		if (nap_enabled) per_proc_info[target_cpu].pf.Available |= pfWillNap;	/* Is nap supported on this machine? */
		else per_proc_info[target_cpu].pf.Available &= ~pfWillNap;		/* Clear if not */
	}

	if(target_cpu == cpu_number()) 
		__asm__ volatile("mtsprg 2,%0" : : "r" (per_proc_info[target_cpu].pf.Available));	/* Set live value */

    return (prev_value);
}

void
ml_ppc_get_info(ml_ppc_cpu_info_t *cpu_info)
{
  if (cpu_info == 0) return;
  
  cpu_info->vector_unit = (per_proc_info[0].pf.Available & pfAltivec) != 0;
  cpu_info->cache_line_size = per_proc_info[0].pf.lineSize;
  cpu_info->l1_icache_size = per_proc_info[0].pf.l1iSize;
  cpu_info->l1_dcache_size = per_proc_info[0].pf.l1dSize;
  
  if (per_proc_info[0].pf.Available & pfL2) {
    cpu_info->l2_settings = per_proc_info[0].pf.l2cr;
    cpu_info->l2_cache_size = per_proc_info[0].pf.l2Size;
  } else {
    cpu_info->l2_settings = 0;
    cpu_info->l2_cache_size = 0xFFFFFFFF;
  }
  if (per_proc_info[0].pf.Available & pfL3) {
    cpu_info->l3_settings = per_proc_info[0].pf.l3cr;
    cpu_info->l3_cache_size = per_proc_info[0].pf.l3Size;
  } else {
    cpu_info->l3_settings = 0;
    cpu_info->l3_cache_size = 0xFFFFFFFF;
  }
}

void
init_ast_check(processor_t processor)
{}
                
void
cause_ast_check(processor_t processor)
{
	if ((processor != current_processor())
	    && (per_proc_info[processor->slot_num].interrupts_enabled == TRUE))
		cpu_signal(processor->slot_num, SIGPast, NULL, NULL);
}
              
thread_t        
switch_to_shutdown_context(
	thread_t	thread,
	void		(*doshutdown)(processor_t),
	processor_t	processor)
{
	disable_preemption();
	CreateShutdownCTX();   
	enable_preemption();
	return((thread_t)(per_proc_info[cpu_number()].old_thread));
}

int
set_be_bit()
{
	
	int mycpu;
	boolean_t current_state;

	current_state = ml_set_interrupts_enabled(FALSE);	/* Can't allow interruptions when mucking with per_proc flags */
	mycpu = cpu_number();
	per_proc_info[mycpu].cpu_flags |= traceBE;
	(void) ml_set_interrupts_enabled(current_state);
	return(1);
}

int
clr_be_bit()
{
	int mycpu;
	boolean_t current_state;

	current_state = ml_set_interrupts_enabled(FALSE);	/* Can't allow interruptions when mucking with per_proc flags */
	mycpu = cpu_number();
	per_proc_info[mycpu].cpu_flags &= ~traceBE;
	(void) ml_set_interrupts_enabled(current_state);
	return(1);
}

int
be_tracing()
{
  int mycpu = cpu_number();
  return(per_proc_info[mycpu].cpu_flags & traceBE);
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	#include <ppc/machine_routines.h>
	23	#include <ppc/machine_cpu.h>
	24	#include <ppc/exception.h>
	25	#include <ppc/misc_protos.h>
	26	#include <ppc/Firmware.h>
	27	#include <vm/vm_page.h>
	28	#include <ppc/pmap.h>
	29	#include <ppc/proc_reg.h>
	30	#include <kern/processor.h>
	31
	32	boolean_t get_interrupts_enabled(void);
1c79356b A	33
	34	/* Map memory map IO space */
	35	vm_offset_t
	36	ml_io_map(
	37	vm_offset_t phys_addr,
	38	vm_size_t size)
	39	{
	40	return(io_map(phys_addr,size));
	41	}
	42
	43	/* static memory allocation */
	44	vm_offset_t
	45	ml_static_malloc(
	46	vm_size_t size)
	47	{
	48	extern vm_offset_t static_memory_end;
	49	extern boolean_t pmap_initialized;
	50	vm_offset_t vaddr;
	51
	52	if (pmap_initialized)
	53	return((vm_offset_t)NULL);
	54	else {
	55	vaddr = static_memory_end;
	56	static_memory_end = round_page(vaddr+size);
	57	return(vaddr);
	58	}
	59	}
	60
	61	vm_offset_t
	62	ml_static_ptovirt(
	63	vm_offset_t paddr)
	64	{
	65	extern vm_offset_t static_memory_end;
	66	vm_offset_t vaddr;
	67
	68	/* Static memory is map V=R */
	69	vaddr = paddr;
	70	if ( (vaddr < static_memory_end) && (pmap_extract(kernel_pmap, vaddr)==paddr) )
	71	return(vaddr);
	72	else
	73	return((vm_offset_t)NULL);
	74	}
	75
	76	void
	77	ml_static_mfree(
	78	vm_offset_t vaddr,
	79	vm_size_t size)
	80	{
	81	vm_offset_t paddr_cur, vaddr_cur;
	82
	83	for (vaddr_cur = round_page(vaddr);
	84	vaddr_cur < trunc_page(vaddr+size);
	85	vaddr_cur += PAGE_SIZE) {
	86	paddr_cur = pmap_extract(kernel_pmap, vaddr_cur);
	87	if (paddr_cur != (vm_offset_t)NULL) {
	88	vm_page_wire_count--;
	89	pmap_remove(kernel_pmap, vaddr_cur, vaddr_cur+PAGE_SIZE);
	90	vm_page_create(paddr_cur,paddr_cur+PAGE_SIZE);
	91	}
	92	}
	93	}
	94
	95	/* virtual to physical on wired pages */
	96	vm_offset_t ml_vtophys(
97	vm_offset_t vaddr)
98	{
99	return(pmap_extract(kernel_pmap, vaddr));
100	}
101
102	/* Initialize Interrupt Handler */
103	void ml_install_interrupt_handler(
104	void *nub,
105	int source,
106	void *target,
107	IOInterruptHandler handler,
108	void *refCon)
109	{
110	int current_cpu;
111	boolean_t current_state;
112
113	current_cpu = cpu_number();
114	current_state = ml_get_interrupts_enabled();
115
116	per_proc_info[current_cpu].interrupt_nub = nub;
117	per_proc_info[current_cpu].interrupt_source = source;
118	per_proc_info[current_cpu].interrupt_target = target;
119	per_proc_info[current_cpu].interrupt_handler = handler;
120	per_proc_info[current_cpu].interrupt_refCon = refCon;
121
0b4e3aa0	122	per_proc_info[current_cpu].interrupts_enabled = TRUE;
1c79356b A	123	(void) ml_set_interrupts_enabled(current_state);
	124	}
	125
	126	/* Initialize Interrupts */
	127	void ml_init_interrupt(void)
	128	{
	129	int current_cpu;
	130	boolean_t current_state;
	131
	132	current_state = ml_get_interrupts_enabled();
	133
	134	current_cpu = cpu_number();
0b4e3aa0	135	per_proc_info[current_cpu].interrupts_enabled = TRUE;
1c79356b A	136	(void) ml_set_interrupts_enabled(current_state);
	137	}
	138
	139	boolean_t fake_get_interrupts_enabled(void)
	140	{
	141	/*
	142	* The scheduler is not active on this cpu. There is no need to disable
	143	* preemption. The current thread wont be dispatched on anhother cpu.
	144	*/
	145	return((per_proc_info[cpu_number()].cpu_flags & turnEEon) != 0);
	146	}
	147
	148	boolean_t fake_set_interrupts_enabled(boolean_t enable)
	149	{
	150	boolean_t interrupt_state_prev;
	151
	152	/*
	153	* The scheduler is not active on this cpu. There is no need to disable
	154	* preemption. The current thread wont be dispatched on anhother cpu.
	155	*/
	156	interrupt_state_prev =
	157	(per_proc_info[cpu_number()].cpu_flags & turnEEon) != 0;
	158	if (interrupt_state_prev != enable)
	159	per_proc_info[cpu_number()].cpu_flags ^= turnEEon;
	160	return(interrupt_state_prev);
	161	}
	162
	163	/* Get Interrupts Enabled */
	164	boolean_t ml_get_interrupts_enabled(void)
	165	{
0b4e3aa0 A	166	if (per_proc_info[cpu_number()].interrupts_enabled == TRUE)
	167	return(get_interrupts_enabled());
	168	else
	169	return(fake_get_interrupts_enabled());
1c79356b A	170	}
	171
	172	boolean_t get_interrupts_enabled(void)
	173	{
	174	return((mfmsr() & MASK(MSR_EE)) != 0);
	175	}
	176
1c79356b A	177	/* Check if running at interrupt context */
	178	boolean_t ml_at_interrupt_context(void)
	179	{
0b4e3aa0 A	180	boolean_t ret;
	181	boolean_t current_state;
	182
	183	current_state = ml_set_interrupts_enabled(FALSE);
	184	ret = (per_proc_info[cpu_number()].istackptr == 0);
	185	ml_set_interrupts_enabled(current_state);
	186	return(ret);
1c79356b A	187	}
	188
	189	/* Generate a fake interrupt */
	190	void ml_cause_interrupt(void)
	191	{
	192	CreateFakeIO();
	193	}
	194
1c79356b A	195	void machine_idle(void)
1c79356b A	196	{
0b4e3aa0	197	if (per_proc_info[cpu_number()].interrupts_enabled == TRUE) {
1c79356b A	198	int cur_decr;
	199
	200	machine_idle_ppc();
	201
	202	/*
	203	* protect against a lost decrementer trap
	204	* if the current decrementer value is negative
	205	* by more than 10 ticks, re-arm it since it's
	206	* unlikely to fire at this point... a hardware
	207	* interrupt got us out of machine_idle and may
	208	* also be contributing to this state
	209	*/
	210	cur_decr = isync_mfdec();
	211
	212	if (cur_decr < -10) {
	213	mtdec(1);
	214	}
	215	}
	216	}
	217
	218	void
	219	machine_signal_idle(
	220	processor_t processor)
	221	{
	222	(void)cpu_signal(processor->slot_num, SIGPwake, 0, 0);
	223	}
	224
	225	kern_return_t
	226	ml_processor_register(
	227	ml_processor_info_t *processor_info,
	228	processor_t *processor,
	229	ipi_handler_t *ipi_handler)
	230	{
	231	kern_return_t ret;
	232	int target_cpu;
	233
	234	if (processor_info->boot_cpu == FALSE) {
	235	if (cpu_register(&target_cpu) != KERN_SUCCESS)
	236	return KERN_FAILURE;
	237	} else {
	238	/* boot_cpu is always 0 */
	239	target_cpu= 0;
	240	}
	241
	242	per_proc_info[target_cpu].cpu_id = processor_info->cpu_id;
	243	per_proc_info[target_cpu].start_paddr = processor_info->start_paddr;
	244
	245	if(per_proc_info[target_cpu].pf.Available & pfCanNap)
	246	if(processor_info->supports_nap)
	247	per_proc_info[target_cpu].pf.Available \|= pfWillNap;
	248
	249	if(processor_info->time_base_enable != (void(*)(cpu_id_t, boolean_t ))NULL)
	250	per_proc_info[target_cpu].time_base_enable = processor_info->time_base_enable;
	251	else
	252	per_proc_info[target_cpu].time_base_enable = (void(*)(cpu_id_t, boolean_t ))NULL;
	253
	254	if(target_cpu == cpu_number())
	255	__asm__ volatile("mtsprg 2,%0" : : "r" (per_proc_info[target_cpu].pf.Available)); /* Set live value */
	256
	257	*processor = cpu_to_processor(target_cpu);
	258	*ipi_handler = cpu_signal_handler;
	259
	260	return KERN_SUCCESS;
	261	}
262
263	boolean_t
264	ml_enable_nap(int target_cpu, boolean_t nap_enabled)
265	{
266	boolean_t prev_value = (per_proc_info[target_cpu].pf.Available & pfCanNap) && (per_proc_info[target_cpu].pf.Available & pfWillNap);
267
268	if(per_proc_info[target_cpu].pf.Available & pfCanNap) { /* Can the processor nap? */
269	if (nap_enabled) per_proc_info[target_cpu].pf.Available \|= pfWillNap; /* Is nap supported on this machine? */
270	else per_proc_info[target_cpu].pf.Available &= ~pfWillNap; /* Clear if not */
271	}
272
273	if(target_cpu == cpu_number())
274	__asm__ volatile("mtsprg 2,%0" : : "r" (per_proc_info[target_cpu].pf.Available)); /* Set live value */
275
276	return (prev_value);
277	}
278
279	void
280	ml_ppc_get_info(ml_ppc_cpu_info_t *cpu_info)
281	{
282	if (cpu_info == 0) return;
283
284	cpu_info->vector_unit = (per_proc_info[0].pf.Available & pfAltivec) != 0;
285	cpu_info->cache_line_size = per_proc_info[0].pf.lineSize;
286	cpu_info->l1_icache_size = per_proc_info[0].pf.l1iSize;
287	cpu_info->l1_dcache_size = per_proc_info[0].pf.l1dSize;
288
289	if (per_proc_info[0].pf.Available & pfL2) {
290	cpu_info->l2_settings = per_proc_info[0].pf.l2cr;
291	cpu_info->l2_cache_size = per_proc_info[0].pf.l2Size;
292	} else {
293	cpu_info->l2_settings = 0;
294	cpu_info->l2_cache_size = 0xFFFFFFFF;
295	}
296	if (per_proc_info[0].pf.Available & pfL3) {
297	cpu_info->l3_settings = per_proc_info[0].pf.l3cr;
298	cpu_info->l3_cache_size = per_proc_info[0].pf.l3Size;
299	} else {
300	cpu_info->l3_settings = 0;
301	cpu_info->l3_cache_size = 0xFFFFFFFF;
302	}
303	}
304
305	void
306	init_ast_check(processor_t processor)
307	{}
308
309	void
310	cause_ast_check(processor_t processor)
311	{
312	if ((processor != current_processor())
0b4e3aa0	313	&& (per_proc_info[processor->slot_num].interrupts_enabled == TRUE))
1c79356b A	314	cpu_signal(processor->slot_num, SIGPast, NULL, NULL);
	315	}
	316
	317	thread_t
	318	switch_to_shutdown_context(
	319	thread_t thread,
	320	void (*doshutdown)(processor_t),
	321	processor_t processor)
	322	{
	323	disable_preemption();
	324	CreateShutdownCTX();
	325	enable_preemption();
	326	return((thread_t)(per_proc_info[cpu_number()].old_thread));
	327	}
	328
	329	int
	330	set_be_bit()
	331	{
	332
	333	int mycpu;
	334	boolean_t current_state;
	335
	336	current_state = ml_set_interrupts_enabled(FALSE); /* Can't allow interruptions when mucking with per_proc flags */
	337	mycpu = cpu_number();
	338	per_proc_info[mycpu].cpu_flags \|= traceBE;
	339	(void) ml_set_interrupts_enabled(current_state);
	340	return(1);
	341	}
	342
	343	int
	344	clr_be_bit()
	345	{
	346	int mycpu;
	347	boolean_t current_state;
	348
	349	current_state = ml_set_interrupts_enabled(FALSE); /* Can't allow interruptions when mucking with per_proc flags */
	350	mycpu = cpu_number();
	351	per_proc_info[mycpu].cpu_flags &= ~traceBE;
	352	(void) ml_set_interrupts_enabled(current_state);
	353	return(1);
	354	}
	355
	356	int
	357	be_tracing()
	358	{
	359	int mycpu = cpu_number();
	360	return(per_proc_info[mycpu].cpu_flags & traceBE);
	361	}
0b4e3aa0	362