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[SPARC64]: Fix powering off on SMP.

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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: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2005-10-14 15:26:08 -07:00
parent f75884d28a
commit b4d1b82578
3 changed files with 0 additions and 35 deletions
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7
arch/sparc64/kernel/smp.c
View file

@ -1001,13 +1001,6 @@ void smp_penguin_jailcell(int irq, struct pt_regs *regs)
preempt_enable(); 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_multiplier(__cpu) cpu_data(__cpu).multiplier
#define prof_counter(__cpu) cpu_data(__cpu).counter #define prof_counter(__cpu) cpu_data(__cpu).counter

16
arch/sparc64/mm/ultra.S
View file

@ -453,22 +453,6 @@ xcall_flush_dcache_page_spitfire: /* %g1 == physical page address
nop nop
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 .data
errata32_hwbug: errata32_hwbug:

12
arch/sparc64/prom/misc.c
View file

@ -68,19 +68,11 @@ void prom_cmdline(void)
local_irq_restore(flags); local_irq_restore(flags);
} }
#ifdef CONFIG_SMP
extern void smp_promstop_others(void);
#endif
/* Drop into the prom, but completely terminate the program. /* Drop into the prom, but completely terminate the program.
* No chance of continuing. * No chance of continuing.
*/ */
void prom_halt(void) void prom_halt(void)
{ {
#ifdef CONFIG_SMP
smp_promstop_others();
udelay(8000);
#endif
again: again:
p1275_cmd("exit", P1275_INOUT(0, 0)); p1275_cmd("exit", P1275_INOUT(0, 0));
goto again; /* PROM is out to get me -DaveM */ goto again; /* PROM is out to get me -DaveM */
@ -88,10 +80,6 @@ void prom_halt(void)
void prom_halt_power_off(void) void prom_halt_power_off(void)
{ {
#ifdef CONFIG_SMP
smp_promstop_others();
udelay(8000);
#endif
p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0)); p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
/* if nothing else helps, we just halt */ /* if nothing else helps, we just halt */