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*		*
* cpu switching functions		* cpu switching functions
*		*
* Created : 15/10/94		* Created : 15/10/94
*		*
*/		*/

#include "assym.inc"		#include "assym.inc"
#include "opt_sched.h"

#include <machine/asm.h>		#include <machine/asm.h>
#include <machine/asmacros.h>		#include <machine/asmacros.h>
#include <machine/armreg.h>		#include <machine/armreg.h>
#include <machine/sysreg.h>		#include <machine/sysreg.h>
#include <machine/vfp.h>		#include <machine/vfp.h>
#if defined(SMP)		#if defined(SMP)
#define GET_PCPU(tmp, tmp2) \		#define GET_PCPU(tmp, tmp2) \
▲ Show 20 Lines • Show All 336 Lines • ▼ Show 20 Lines	sw1:
clrex		clrex
/*		/*
* Registers at this point		* Registers at this point
* r7 = new PCB		* r7 = new PCB
* r8 = current pcpu		* r8 = current pcpu
* r11 = newtd		* r11 = newtd
*/		*/

#if defined(SMP) && defined(SCHED_ULE)		#if defined(SMP)
/*
* 386 and amd64 do the blocked lock test only for SMP and SCHED_ULE
* QQQ: What does it mean in reality and why is it done?
*/
ldr r6, =blocked_lock		ldr r6, =blocked_lock
1:		1:
ldr r3, [r11, #TD_LOCK] /* atomic write regular read */		ldr r3, [r11, #TD_LOCK] /* atomic write regular read */
cmp r3, r6		cmp r3, r6
beq 1b		beq 1b
#endif		#endif

/* We have a new curthread now so make a note it */		/* We have a new curthread now so make a note it */
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