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ARM: pxa: fix building without IWMMXT

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When CONFIG_IWMMXT, the pxa3xx and pxa27x suspend/resume code
emits some xscale specific instructions, which are rejected
by the assembler, because gcc is built with -march=armv5
-mtune=xscale and passes that option to the assembler:

/tmp/cciHumzr.s:553: Error: selected processor does not support ARM mode `mra r2,r3,acc0'
/tmp/cciHumzr.s:605: Error: selected processor does not support ARM mode `mar acc0,r2,r3'
make[3]: *** [arch/arm/mach-pxa/pxa3xx.o] Error 1
/tmp/cci5MUNu.s:326: Error: selected processor does not support ARM mode `mra r2,r3,acc0'
/tmp/cci5MUNu.s:367: Error: selected processor does not support ARM mode `mar acc0,r2,r3'
make[3]: *** [arch/arm/mach-pxa/pxa27x.o] Error 1

Overriding with -Wa,-march=xscale no longer works, so instead
I'm adding an explict ".arch_extension" directive in all four inline
assembly statements, which should work even if they end up in a different
order in the assembly output.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
This commit is contained in:
Arnd Bergmann 2016-01-29 15:06:31 +01:00 committed by Robert Jarzmik
parent a9a54caed9
commit 343c1cdbc8
2 changed files with 8 additions and 4 deletions
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6
arch/arm/mach-pxa/pxa27x.c
View file

@ -132,7 +132,8 @@ void pxa27x_cpu_pm_enter(suspend_state_t state)
#ifndef CONFIG_IWMMXT
u64 acc0;
asm volatile("mra %Q0, %R0, acc0" : "=r" (acc0));
asm volatile(".arch_extension xscale\n\t"
"mra %Q0, %R0, acc0" : "=r" (acc0));
#endif
/* ensure voltage-change sequencer not initiated, which hangs */
@ -151,7 +152,8 @@ void pxa27x_cpu_pm_enter(suspend_state_t state)
case PM_SUSPEND_MEM:
cpu_suspend(pwrmode, pxa27x_finish_suspend);
#ifndef CONFIG_IWMMXT
asm volatile("mar acc0, %Q0, %R0" : "=r" (acc0));
asm volatile(".arch_extension xscale\n\t"
"mar acc0, %Q0, %R0" : "=r" (acc0));
#endif
break;
}

6
arch/arm/mach-pxa/pxa3xx.c
View file

@ -102,7 +102,8 @@ static void pxa3xx_cpu_pm_suspend(void)
#ifndef CONFIG_IWMMXT
u64 acc0;
asm volatile("mra %Q0, %R0, acc0" : "=r" (acc0));
asm volatile(".arch_extension xscale\n\t"
"mra %Q0, %R0, acc0" : "=r" (acc0));
#endif
/* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */
@ -130,7 +131,8 @@ static void pxa3xx_cpu_pm_suspend(void)
AD3ER = 0;
#ifndef CONFIG_IWMMXT
asm volatile("mar acc0, %Q0, %R0" : "=r" (acc0));
asm volatile(".arch_extension xscale\n\t"
"mar acc0, %Q0, %R0" : "=r" (acc0));
#endif
}