On 16.03.2016 16:12, Laurent Vivier wrote:
> Signed-off-by: Laurent Vivier <lvivier@xxxxxxxxxx>
> ---
> lib/powerpc/asm/hcall.h | 1 +
> lib/powerpc/asm/ppc_asm.h | 5 ++
> lib/powerpc/asm/processor.h | 11 ++++
> lib/powerpc/processor.c | 38 +++++++++++++
> lib/powerpc/setup.c | 19 +++++++
> lib/ppc64/asm-offsets.c | 42 ++++++++++++++
> lib/ppc64/asm/processor.h | 1 +
> lib/ppc64/asm/ptrace.h | 24 ++++++++
> powerpc/Makefile.common | 1 +
> powerpc/cstart64.S | 136 ++++++++++++++++++++++++++++++++++++++++++++
> 10 files changed, 278 insertions(+)
> create mode 100644 lib/powerpc/asm/processor.h
> create mode 100644 lib/powerpc/processor.c
> create mode 100644 lib/ppc64/asm/processor.h
> create mode 100644 lib/ppc64/asm/ptrace.h
...
> diff --git a/lib/powerpc/setup.c b/lib/powerpc/setup.c
> index 0c0c882..afe7fbc 100644
> --- a/lib/powerpc/setup.c
> +++ b/lib/powerpc/setup.c
> @@ -16,6 +16,8 @@
> #include <alloc.h>
> #include <asm/setup.h>
> #include <asm/page.h>
> +#include <asm/ppc_asm.h>
> +#include <asm/hcall.h>
>
> extern unsigned long stacktop;
> extern void io_init(void);
> @@ -33,6 +35,10 @@ struct cpu_set_params {
> unsigned dcache_bytes;
> };
>
> +#define EXCEPTION_STACK_SIZE (32*1024) /* 32kB */
> +
> +static char exception_stack[NR_CPUS][EXCEPTION_STACK_SIZE];
> +
> static void cpu_set(int fdtnode, u32 regval, void *info)
> {
> static bool read_common_info = false;
> @@ -46,6 +52,11 @@ static void cpu_set(int fdtnode, u32 regval, void *info)
> }
> cpus[cpu] = regval;
>
> + /* set exception stack address for this CPU (in SPGR0) */
> +
> + asm volatile ("mtsprg0 %[addr]" ::
> + [addr] "r" (exception_stack + cpu + 1));
Maybe use "exception_stack[cpu + 1]" instead? That's easier to read.
Thomas
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