* [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro
@ 2012-12-03 3:06 Rob Herring
2012-12-03 3:06 ` [U-Boot] [PATCH 2/2] ARM: highbank: use wfi macro instead of inline asm Rob Herring
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Rob Herring @ 2012-12-03 3:06 UTC (permalink / raw)
To: u-boot
From: Rob Herring <rob.herring@calxeda.com>
Since wfi instruction is only available on ARMv7, add a conditional
macro for it.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---
arch/arm/include/asm/system.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 2b28a26..2f6aecd 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -61,6 +61,12 @@
#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
+#ifdef __ARM_ARCH_7A__
+#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
+#else
+#define wfi()
+#endif
+
static inline unsigned int get_cr(void)
{
unsigned int val;
--
1.7.10.4
^ permalink raw reply related [flat|nested] 7+ messages in thread* [U-Boot] [PATCH 2/2] ARM: highbank: use wfi macro instead of inline asm
2012-12-03 3:06 [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Rob Herring
@ 2012-12-03 3:06 ` Rob Herring
2013-02-03 14:29 ` Albert ARIBAUD
2012-12-03 4:58 ` [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Marek Vasut
2013-02-03 14:29 ` Albert ARIBAUD
2 siblings, 1 reply; 7+ messages in thread
From: Rob Herring @ 2012-12-03 3:06 UTC (permalink / raw)
To: u-boot
From: Rob Herring <rob.herring@calxeda.com>
Older compilers don't recognize v7 wfi instruction, so use wfi macro to
fix builds on old compilers.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---
board/highbank/highbank.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/board/highbank/highbank.c b/board/highbank/highbank.c
index f41bf05..09cd45d 100644
--- a/board/highbank/highbank.c
+++ b/board/highbank/highbank.c
@@ -88,5 +88,6 @@ void dram_init_banksize(void)
void reset_cpu(ulong addr)
{
writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
- asm(" wfi");
+
+ wfi();
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 7+ messages in thread* [U-Boot] [PATCH 2/2] ARM: highbank: use wfi macro instead of inline asm
2012-12-03 3:06 ` [U-Boot] [PATCH 2/2] ARM: highbank: use wfi macro instead of inline asm Rob Herring
@ 2013-02-03 14:29 ` Albert ARIBAUD
0 siblings, 0 replies; 7+ messages in thread
From: Albert ARIBAUD @ 2013-02-03 14:29 UTC (permalink / raw)
To: u-boot
Hi Rob,
On Sun, 2 Dec 2012 21:06:22 -0600, Rob Herring <robherring2@gmail.com>
wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Older compilers don't recognize v7 wfi instruction, so use wfi macro to
> fix builds on old compilers.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> ---
> board/highbank/highbank.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/board/highbank/highbank.c b/board/highbank/highbank.c
> index f41bf05..09cd45d 100644
> --- a/board/highbank/highbank.c
> +++ b/board/highbank/highbank.c
> @@ -88,5 +88,6 @@ void dram_init_banksize(void)
> void reset_cpu(ulong addr)
> {
> writel(HB_PWR_HARD_RESET, HB_SREG_A9_PWR_REQ);
> - asm(" wfi");
> +
> + wfi();
> }
Applied to u-boot-arm/master, thanks!
Amicalement,
--
Albert.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro
2012-12-03 3:06 [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Rob Herring
2012-12-03 3:06 ` [U-Boot] [PATCH 2/2] ARM: highbank: use wfi macro instead of inline asm Rob Herring
@ 2012-12-03 4:58 ` Marek Vasut
2012-12-03 13:32 ` Rob Herring
2013-02-03 14:29 ` Albert ARIBAUD
2 siblings, 1 reply; 7+ messages in thread
From: Marek Vasut @ 2012-12-03 4:58 UTC (permalink / raw)
To: u-boot
Dear Rob Herring,
> From: Rob Herring <rob.herring@calxeda.com>
>
> Since wfi instruction is only available on ARMv7, add a conditional
> macro for it.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> ---
> arch/arm/include/asm/system.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
> index 2b28a26..2f6aecd 100644
> --- a/arch/arm/include/asm/system.h
> +++ b/arch/arm/include/asm/system.h
> @@ -61,6 +61,12 @@
>
> #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
>
> +#ifdef __ARM_ARCH_7A__
> +#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
> +#else
> +#define wfi()
> +#endif
Won't this break other (non-arm) systems? Moreover, maybe you can make this an
(inline) function instead?
> static inline unsigned int get_cr(void)
> {
> unsigned int val;
Best regards,
Marek Vasut
^ permalink raw reply [flat|nested] 7+ messages in thread* [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro
2012-12-03 4:58 ` [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Marek Vasut
@ 2012-12-03 13:32 ` Rob Herring
2012-12-03 14:39 ` Marek Vasut
0 siblings, 1 reply; 7+ messages in thread
From: Rob Herring @ 2012-12-03 13:32 UTC (permalink / raw)
To: u-boot
On 12/02/2012 10:58 PM, Marek Vasut wrote:
> Dear Rob Herring,
>
>> From: Rob Herring <rob.herring@calxeda.com>
>>
>> Since wfi instruction is only available on ARMv7, add a conditional
>> macro for it.
>>
>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>> ---
>> arch/arm/include/asm/system.h | 6 ++++++
>> 1 file changed, 6 insertions(+)
>>
>> diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
>> index 2b28a26..2f6aecd 100644
>> --- a/arch/arm/include/asm/system.h
>> +++ b/arch/arm/include/asm/system.h
>> @@ -61,6 +61,12 @@
>>
>> #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
>>
>> +#ifdef __ARM_ARCH_7A__
>> +#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
>> +#else
>> +#define wfi()
>> +#endif
>
> Won't this break other (non-arm) systems? Moreover, maybe you can make this an
> (inline) function instead?
How? It is in an ARM specific header and empty on anything but ARMv7
enabled compiler. This follows the kernel implementation and the nop above.
Rob
>
>> static inline unsigned int get_cr(void)
>> {
>> unsigned int val;
>
> Best regards,
> Marek Vasut
>
^ permalink raw reply [flat|nested] 7+ messages in thread* [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro
2012-12-03 13:32 ` Rob Herring
@ 2012-12-03 14:39 ` Marek Vasut
0 siblings, 0 replies; 7+ messages in thread
From: Marek Vasut @ 2012-12-03 14:39 UTC (permalink / raw)
To: u-boot
Dear Rob Herring,
> On 12/02/2012 10:58 PM, Marek Vasut wrote:
> > Dear Rob Herring,
> >
> >> From: Rob Herring <rob.herring@calxeda.com>
> >>
> >> Since wfi instruction is only available on ARMv7, add a conditional
> >> macro for it.
> >>
> >> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> >> ---
> >>
> >> arch/arm/include/asm/system.h | 6 ++++++
> >> 1 file changed, 6 insertions(+)
> >>
> >> diff --git a/arch/arm/include/asm/system.h
> >> b/arch/arm/include/asm/system.h index 2b28a26..2f6aecd 100644
> >> --- a/arch/arm/include/asm/system.h
> >> +++ b/arch/arm/include/asm/system.h
> >> @@ -61,6 +61,12 @@
> >>
> >> #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
> >>
> >> +#ifdef __ARM_ARCH_7A__
> >> +#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
> >> +#else
> >> +#define wfi()
> >> +#endif
> >
> > Won't this break other (non-arm) systems? Moreover, maybe you can make
> > this an (inline) function instead?
>
> How? It is in an ARM specific header and empty on anything but ARMv7
> enabled compiler. This follows the kernel implementation and the nop above.
Ok, I missed the arch/arm. It's ok then, sorry for the noise.
[...]
Best regards,
Marek Vasut
^ permalink raw reply [flat|nested] 7+ messages in thread
* [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro
2012-12-03 3:06 [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Rob Herring
2012-12-03 3:06 ` [U-Boot] [PATCH 2/2] ARM: highbank: use wfi macro instead of inline asm Rob Herring
2012-12-03 4:58 ` [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Marek Vasut
@ 2013-02-03 14:29 ` Albert ARIBAUD
2 siblings, 0 replies; 7+ messages in thread
From: Albert ARIBAUD @ 2013-02-03 14:29 UTC (permalink / raw)
To: u-boot
Hi Rob,
On Sun, 2 Dec 2012 21:06:21 -0600, Rob Herring <robherring2@gmail.com>
wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Since wfi instruction is only available on ARMv7, add a conditional
> macro for it.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> ---
> arch/arm/include/asm/system.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
> index 2b28a26..2f6aecd 100644
> --- a/arch/arm/include/asm/system.h
> +++ b/arch/arm/include/asm/system.h
> @@ -61,6 +61,12 @@
>
> #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
>
> +#ifdef __ARM_ARCH_7A__
> +#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
> +#else
> +#define wfi()
> +#endif
> +
> static inline unsigned int get_cr(void)
> {
> unsigned int val;
Applied to u-boot-arm/master, thanks!
Amicalement,
--
Albert.
^ permalink raw reply [flat|nested] 7+ messages in thread
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2012-12-03 3:06 [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Rob Herring
2012-12-03 3:06 ` [U-Boot] [PATCH 2/2] ARM: highbank: use wfi macro instead of inline asm Rob Herring
2013-02-03 14:29 ` Albert ARIBAUD
2012-12-03 4:58 ` [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Marek Vasut
2012-12-03 13:32 ` Rob Herring
2012-12-03 14:39 ` Marek Vasut
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