On Tue, May 3, 2016 at 3:51 PM, Russell King <rmk at arm.linux.org.uk> wrote:
> Add a helper to add a memory range to a memory_regions array.
>
> Signed-off-by: Russell King <rmk at arm.linux.org.uk>
Reviewed-by: Pratyush Anand <panand at redhat.com>
> ---
> kexec/Makefile | 4 ++++
> kexec/mem_regions.c | 30 ++++++++++++++++++++++++++++++
> kexec/mem_regions.h | 9 +++++++++
> 3 files changed, 43 insertions(+)
> create mode 100644 kexec/mem_regions.c
> create mode 100644 kexec/mem_regions.h
>
> diff --git a/kexec/Makefile b/kexec/Makefile
> index a758b4a..e2aee84 100644
> --- a/kexec/Makefile
> +++ b/kexec/Makefile
> @@ -69,6 +69,10 @@ dist += kexec/fs2dt.c kexec/fs2dt.h
> $(ARCH)_FS2DT =
> KEXEC_SRCS += $($(ARCH)_FS2DT)
>
> +dist += kexec/mem_regions.c kexec/mem_regions.h
> +$(ARCH)_MEM_REGIONS =
> +KEXEC_SRCS += $($(ARCH)_MEM_REGIONS)
> +
> include $(srcdir)/kexec/arch/alpha/Makefile
> include $(srcdir)/kexec/arch/arm/Makefile
> include $(srcdir)/kexec/arch/i386/Makefile
> diff --git a/kexec/mem_regions.c b/kexec/mem_regions.c
> new file mode 100644
> index 0000000..a4952ff
> --- /dev/null
> +++ b/kexec/mem_regions.c
> @@ -0,0 +1,30 @@
> +#include "kexec.h"
> +#include "mem_regions.h"
> +
> +/**
> + * mem_regions_add() - add a memory region to a set of ranges
> + * @ranges: ranges to add the memory region to
> + * @max: maximum number of entries in memory region
> + * @base: base address of memory region
> + * @length: length of memory region in bytes
> + * @type: type of memory region
> + *
> + * Add the memory region to the set of ranges, and return %0 if successful,
> + * or %-1 if we ran out of space.
> + */
> +int mem_regions_add(struct memory_ranges *ranges, unsigned long long base,
> + unsigned long long length, int type)
> +{
> + struct memory_range *range;
> +
> + if (ranges->size >= ranges->max_size)
> + return -1;
> +
> + range = ranges->ranges + ranges->size++;
> + range->start = base;
> + range->end = base + length - 1;
> + range->type = type;
> +
> + return 0;
> +}
> +
> diff --git a/kexec/mem_regions.h b/kexec/mem_regions.h
> new file mode 100644
> index 0000000..b9cfba1
> --- /dev/null
> +++ b/kexec/mem_regions.h
> @@ -0,0 +1,9 @@
> +#ifndef MEM_REGIONS_H
> +#define MEM_REGIONS_H
> +
> +struct memory_ranges;
> +
> +int mem_regions_add(struct memory_ranges *ranges, unsigned long long base,
> + unsigned long long length, int type);
> +
> +#endif
> --
> 1.9.1
>
