On 13.02.2018 17:23, David Hildenbrand wrote:
> We now have the range of free memory, let's initialize the physical
> allocator. It is now possible to use use malloc and memalign, based on the
> early-ops. alloc_pages() cannot be used yet (as it has to be initialized
> via free_pages() - e.g. via setup_vm() - first)
>
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
> ---
> lib/s390x/sclp.c | 12 ++++++++++++
> s390x/Makefile | 3 +++
> 2 files changed, 15 insertions(+)
>
> diff --git a/lib/s390x/sclp.c b/lib/s390x/sclp.c
> index 199405c..c7471b1 100644
> --- a/lib/s390x/sclp.c
> +++ b/lib/s390x/sclp.c
> @@ -15,11 +15,21 @@
> #include <asm/arch_def.h>
> #include <asm/interrupt.h>
> #include "sclp.h"
> +#include <alloc_phys.h>
> +
> +extern unsigned long stacktop;
>
> static uint64_t storage_increment_size;
> static uint64_t max_ram_size;
> static uint64_t ram_size;
>
> +static void mem_init(phys_addr_t mem_end)
> +{
> + phys_addr_t freemem_start = (phys_addr_t)&stacktop & PAGE_MASK;
Should be ok since stacktop should be aligned. Otherwise this should
maybe better be (stacktop + PAGE_SIZE - 1) & PAGE_MASK ?
Thomas
