Commit b4d1b825 authored by David S. Miller's avatar David S. Miller
Browse files

[SPARC64]: Fix powering off on SMP. 



Doing a "SUNW,stop-self" firmware call on the other cpus is not the
correct thing to do when dropping into the firmware for a halt,
reboot, or power-off.

For now, just do nothing to quiet the other cpus, as the system should
be quiescent enough.  Later we may decide to implement smp_send_stop()
like the other SMP platforms do.

Based upon a report from Christopher Zimmermann.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f75884d2

arch/sparc64/kernel/smp.c

+0 −7
Original line number Diff line number Diff line
@@ -1001,13 +1001,6 @@ void smp_penguin_jailcell(int irq, struct pt_regs *regs) 
	preempt_enable();

}



extern unsigned long xcall_promstop;



void smp_promstop_others(void)

{

	smp_cross_call(&xcall_promstop, 0, 0, 0);

}



#define prof_multiplier(__cpu)		cpu_data(__cpu).multiplier

#define prof_counter(__cpu)		cpu_data(__cpu).counter

arch/sparc64/mm/ultra.S

+0 −16
Original line number Diff line number Diff line
@@ -453,22 +453,6 @@ xcall_flush_dcache_page_spitfire: /* %g1 == physical page address 
	nop

	nop



	.globl		xcall_promstop

xcall_promstop:

	rdpr		%pstate, %g2

	wrpr		%g2, PSTATE_IG | PSTATE_AG, %pstate

	rdpr		%pil, %g2

	wrpr		%g0, 15, %pil

	sethi		%hi(109f), %g7

	b,pt		%xcc, etrap_irq

109:	 or		%g7, %lo(109b), %g7

	flushw

	call		prom_stopself

	 nop

	/* We should not return, just spin if we do... */

1:	b,a,pt		%xcc, 1b

	nop



	.data



errata32_hwbug:

arch/sparc64/prom/misc.c

+0 −12
Original line number Diff line number Diff line
@@ -68,19 +68,11 @@ void prom_cmdline(void) 
	local_irq_restore(flags);

}



#ifdef CONFIG_SMP

extern void smp_promstop_others(void);

#endif



/* Drop into the prom, but completely terminate the program.

 * No chance of continuing.

 */

void prom_halt(void)

{

#ifdef CONFIG_SMP

	smp_promstop_others();

	udelay(8000);

#endif

again:

	p1275_cmd("exit", P1275_INOUT(0, 0));

	goto again; /* PROM is out to get me -DaveM */
@@ -88,10 +80,6 @@ again: 


void prom_halt_power_off(void)

{

#ifdef CONFIG_SMP

	smp_promstop_others();

	udelay(8000);

#endif

	p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));



	/* if nothing else helps, we just halt */

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