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authorArnd Bergmann <arnd@arndb.de>2016-01-29 15:06:31 +0100
committerRobert Jarzmik <robert.jarzmik@free.fr>2016-02-01 21:44:29 +0100
commit343c1cdbc81c0c7bef05380b10e5c880faf8fb4c (patch)
tree95ecdd48e17d9dad6739b8393cddc0e6bfa19b6a /arch/arm
parentARM: pxa: move extern declarations to pm.h (diff)
downloadlinux-343c1cdbc81c0c7bef05380b10e5c880faf8fb4c.tar.xz
linux-343c1cdbc81c0c7bef05380b10e5c880faf8fb4c.zip
ARM: pxa: fix building without IWMMXT
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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-pxa/pxa27x.c6
-rw-r--r--arch/arm/mach-pxa/pxa3xx.c6
2 files changed, 8 insertions, 4 deletions
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index 8dfd1755c659..49c735962148 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -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;
}
diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index 1ba62be65f7c..126c265691f5 100644
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -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
}