Hi,
On Friday 04 December 2015 08:07:40 Sascha Hauer wrote:
> On Wed, Dec 02, 2015 at 02:48:50PM +0100, Markus Pargmann wrote:
> > RAMOOPS is a driver that uses a reserved static memory region to store
> > the data from the last panic or boot. This helps to debug crashes at the
> > next boot while preserving the boot messages.
> >
> > To guarantee a memory area that is not altered by barebox or the kernel,
> > this area is located at the end of the RAM right after barebox and
> > before the STACK. This ensures that changing barebox sizes do not
> > interfere with RAMOOPS.
> >
> > Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
> > ---
> > arch/arm/cpu/start.c | 6 ++++++
> > arch/arm/include/asm/barebox-arm.h | 14 +++++++++++++-
> > 2 files changed, 19 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
> > index 4ad64b61e86a..d03d1edfaf18 100644
> > --- a/arch/arm/cpu/start.c
> > +++ b/arch/arm/cpu/start.c
> > @@ -118,6 +118,12 @@ static inline unsigned long arm_mem_boarddata(unsigned long membase,
> > return mem;
> > }
> >
> > +unsigned long arm_mem_ramoops_get(void)
> > +{
> > + return arm_mem_ramoops(0, arm_stack_top);
> > +}
> > +EXPORT_SYMBOL_GPL(arm_mem_ramoops_get);
> > +
> > static int barebox_memory_areas_init(void)
> > {
> > unsigned long start = arm_head_bottom;
> > diff --git a/arch/arm/include/asm/barebox-arm.h b/arch/arm/include/asm/barebox-arm.h
> > index da7717538b61..91f1747d2df4 100644
> > --- a/arch/arm/include/asm/barebox-arm.h
> > +++ b/arch/arm/include/asm/barebox-arm.h
> > @@ -122,11 +122,23 @@ static inline unsigned long arm_mem_early_malloc_end(unsigned long membase,
> > return arm_mem_ttb(membase, endmem);
> > }
> >
> > +static inline unsigned long arm_mem_ramoops(unsigned long membase,
> > + unsigned long endmem)
> > +{
> > + endmem = arm_mem_ttb(membase, endmem);
> > +#ifdef CONFIG_FS_PSTORE_RAMOOPS
> > + endmem -= CONFIG_FS_PSTORE_RAMOOPS_SIZE;
> > + endmem &= ~(SZ_4K - 1); /* Align to 4K */
> > +#endif
>
> if (IS_ENABLED(CONFIG_FS_PSTORE_RAMOOPS)) please
This doesn't work here. If CONFIG_FS_PSTORE_RAMOOPS is not defined,
CONFIG_FS_PSTORE_RAMOOPS_SIZE is undefined as well and compiling fails.
Is there any macro I should use for _SIZE here or any Kconfig setup that is
preferred for this situation?
Best Regards,
Markus
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