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| author | Arnd Bergmann <arnd@arndb.de> | 2022-12-15 17:25:14 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-12-19 16:46:32 +0100 |
| commit | 4b88615950fc805690b92b46c8ab794beb4bd6aa (patch) | |
| tree | 119d07e702005d5f780e0b459016be01ecc8fc55 /arch | |
| parent | 4c03c4188cfb831e4ac093599192aedd60625a45 (diff) | |
| download | lwn-4b88615950fc805690b92b46c8ab794beb4bd6aa.tar.gz lwn-4b88615950fc805690b92b46c8ab794beb4bd6aa.zip | |
ARM: pxa: fix building with clang
The integrated assembler in clang does not understand the xscale
specific mra/mar instructions:
arch/arm/mach-pxa/pxa27x.c:136:15: error: unsupported architectural extension: xscale
asm volatile(".arch_extension xscale\n\t"
arch/arm/mach-pxa/pxa27x.c:136:40: error: invalid instruction, did you mean: mcr, mla, mrc, mrs, msr?
mra r2, r3, acc0
Since these are coprocessor features, the same can be expressed using
mrrc/mcrr, so use that for builds with IAS.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20221215162529.3659187-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-pxa/pxa27x.c | 8 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/pxa3xx.c | 8 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c index afbf6ace954f..eea507fd5095 100644 --- a/arch/arm/mach-pxa/pxa27x.c +++ b/arch/arm/mach-pxa/pxa27x.c @@ -133,8 +133,12 @@ void pxa27x_cpu_pm_enter(suspend_state_t state) #ifndef CONFIG_IWMMXT u64 acc0; +#ifndef CONFIG_AS_IS_LLVM asm volatile(".arch_extension xscale\n\t" "mra %Q0, %R0, acc0" : "=r" (acc0)); +#else + asm volatile("mrrc p0, 0, %Q0, %R0, c0" : "=r" (acc0)); +#endif #endif /* ensure voltage-change sequencer not initiated, which hangs */ @@ -153,8 +157,12 @@ void pxa27x_cpu_pm_enter(suspend_state_t state) case PM_SUSPEND_MEM: cpu_suspend(pwrmode, pxa27x_finish_suspend); #ifndef CONFIG_IWMMXT +#ifndef CONFIG_AS_IS_LLVM asm volatile(".arch_extension xscale\n\t" "mar acc0, %Q0, %R0" : "=r" (acc0)); +#else + asm volatile("mcrr p0, 0, %Q0, %R0, c0" :: "r" (acc0)); +#endif #endif break; } diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c index 979642aa7ffe..b26f00fc75d5 100644 --- a/arch/arm/mach-pxa/pxa3xx.c +++ b/arch/arm/mach-pxa/pxa3xx.c @@ -108,8 +108,12 @@ static void pxa3xx_cpu_pm_suspend(void) #ifndef CONFIG_IWMMXT u64 acc0; +#ifdef CONFIG_CC_IS_GCC asm volatile(".arch_extension xscale\n\t" "mra %Q0, %R0, acc0" : "=r" (acc0)); +#else + asm volatile("mrrc p0, 0, %Q0, %R0, c0" : "=r" (acc0)); +#endif #endif /* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */ @@ -137,8 +141,12 @@ static void pxa3xx_cpu_pm_suspend(void) AD3ER = 0; #ifndef CONFIG_IWMMXT +#ifndef CONFIG_AS_IS_LLVM asm volatile(".arch_extension xscale\n\t" "mar acc0, %Q0, %R0" : "=r" (acc0)); +#else + asm volatile("mcrr p0, 0, %Q0, %R0, c0" :: "r" (acc0)); +#endif #endif } |