| Message ID | 1471331895-29887-2-git-send-email-sjitindarsingh@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Aug 16, 2016 at 05:18:12PM +1000, Suraj Jitindar Singh wrote: > Add the lib/powerpc/handlers.c file and associated header files as a place > to implement generic exception handler functions for inclusion in tests. > > Add a generic exception handler for a decrementer (0x900) interrupt which > will reset the decrementer to its maximum value. > > Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> > Reviewed-by: Thomas Huth <thuth@redhat.com> > --- > > Change Log: > > V2 -> V3: > - Whitespace changes > > Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> > --- > lib/powerpc/asm/handlers.h | 8 ++++++++ > lib/powerpc/handlers.c | 22 ++++++++++++++++++++++ > lib/ppc64/asm/handlers.h | 1 + > powerpc/Makefile.common | 1 + > 4 files changed, 32 insertions(+) > create mode 100644 lib/powerpc/asm/handlers.h > create mode 100644 lib/powerpc/handlers.c > create mode 100644 lib/ppc64/asm/handlers.h Reviewed-by: Andrew Jones <drjones@redhat.com> > > diff --git a/lib/powerpc/asm/handlers.h b/lib/powerpc/asm/handlers.h > new file mode 100644 > index 0000000..64ba727 > --- /dev/null > +++ b/lib/powerpc/asm/handlers.h > @@ -0,0 +1,8 @@ > +#ifndef _ASMPOWERPC_HANDLERS_H_ > +#define _ASMPOWERPC_HANDLERS_H_ > + > +#include <asm/ptrace.h> > + > +void dec_except_handler(struct pt_regs *regs, void *data); > + > +#endif /* _ASMPOWERPC_HANDLERS_H_ */ > diff --git a/lib/powerpc/handlers.c b/lib/powerpc/handlers.c > new file mode 100644 > index 0000000..be8226a > --- /dev/null > +++ b/lib/powerpc/handlers.c > @@ -0,0 +1,22 @@ > +/* > + * Generic exception handlers for registration and use in tests > + * > + * Copyright 2016 Suraj Jitindar Singh, IBM. > + * > + * This work is licensed under the terms of the GNU LGPL, version 2. > + */ > + > +#include <libcflat.h> > +#include <asm/handlers.h> > +#include <asm/ptrace.h> > + > +/* > + * Generic handler for decrementer exceptions (0x900) > + * Just reset the decrementer back to its maximum value (0x7FFFFFFF) > + */ > +void dec_except_handler(struct pt_regs *regs __unused, void *data __unused) > +{ > + uint32_t dec = 0x7FFFFFFF; > + > + asm volatile ("mtdec %0" : : "r" (dec)); > +} > diff --git a/lib/ppc64/asm/handlers.h b/lib/ppc64/asm/handlers.h > new file mode 100644 > index 0000000..92e6fb2 > --- /dev/null > +++ b/lib/ppc64/asm/handlers.h > @@ -0,0 +1 @@ > +#include "../../powerpc/asm/handlers.h" > diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common > index 3f8887d..404194b 100644 > --- a/powerpc/Makefile.common > +++ b/powerpc/Makefile.common > @@ -36,6 +36,7 @@ cflatobjs += lib/powerpc/hcall.o > cflatobjs += lib/powerpc/setup.o > cflatobjs += lib/powerpc/rtas.o > cflatobjs += lib/powerpc/processor.o > +cflatobjs += lib/powerpc/handlers.o > > FLATLIBS = $(libcflat) $(LIBFDT_archive) > %.elf: CFLAGS += $(arch_CFLAGS) > -- > 2.5.5 > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/lib/powerpc/asm/handlers.h b/lib/powerpc/asm/handlers.h new file mode 100644 index 0000000..64ba727 --- /dev/null +++ b/lib/powerpc/asm/handlers.h @@ -0,0 +1,8 @@ +#ifndef _ASMPOWERPC_HANDLERS_H_ +#define _ASMPOWERPC_HANDLERS_H_ + +#include <asm/ptrace.h> + +void dec_except_handler(struct pt_regs *regs, void *data); + +#endif /* _ASMPOWERPC_HANDLERS_H_ */ diff --git a/lib/powerpc/handlers.c b/lib/powerpc/handlers.c new file mode 100644 index 0000000..be8226a --- /dev/null +++ b/lib/powerpc/handlers.c @@ -0,0 +1,22 @@ +/* + * Generic exception handlers for registration and use in tests + * + * Copyright 2016 Suraj Jitindar Singh, IBM. + * + * This work is licensed under the terms of the GNU LGPL, version 2. + */ + +#include <libcflat.h> +#include <asm/handlers.h> +#include <asm/ptrace.h> + +/* + * Generic handler for decrementer exceptions (0x900) + * Just reset the decrementer back to its maximum value (0x7FFFFFFF) + */ +void dec_except_handler(struct pt_regs *regs __unused, void *data __unused) +{ + uint32_t dec = 0x7FFFFFFF; + + asm volatile ("mtdec %0" : : "r" (dec)); +} diff --git a/lib/ppc64/asm/handlers.h b/lib/ppc64/asm/handlers.h new file mode 100644 index 0000000..92e6fb2 --- /dev/null +++ b/lib/ppc64/asm/handlers.h @@ -0,0 +1 @@ +#include "../../powerpc/asm/handlers.h" diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common index 3f8887d..404194b 100644 --- a/powerpc/Makefile.common +++ b/powerpc/Makefile.common @@ -36,6 +36,7 @@ cflatobjs += lib/powerpc/hcall.o cflatobjs += lib/powerpc/setup.o cflatobjs += lib/powerpc/rtas.o cflatobjs += lib/powerpc/processor.o +cflatobjs += lib/powerpc/handlers.o FLATLIBS = $(libcflat) $(LIBFDT_archive) %.elf: CFLAGS += $(arch_CFLAGS)