On Sun, 2012-09-09 at 04:43 -0700, Haren Myneni wrote: > Several macros are defined for saving and restore user defined PPR value. > > Signed-off-by: Haren Myneni <ha...@us.ibm.com> > --- > arch/powerpc/include/asm/exception-64s.h | 35 > ++++++++++++++++++++++++++++++ > arch/powerpc/include/asm/reg.h | 1 + > 2 files changed, 36 insertions(+) > > diff --git a/arch/powerpc/include/asm/exception-64s.h > b/arch/powerpc/include/asm/exception-64s.h > index bfd3f1f..618fd18 100644 > --- a/arch/powerpc/include/asm/exception-64s.h > +++ b/arch/powerpc/include/asm/exception-64s.h > @@ -62,6 +62,41 @@ > #define EXC_HV H > #define EXC_STD > > +/* > + * PPR save/restore macros - Used on P7 or later processors > + */ > +#define SAVE_PPR(area, ra, rb) > \ > +BEGIN_FTR_SECTION_NESTED(940) > \ > + ld ra,area+EX_PPR(r13); /* Read PPR from paca */ \ > + clrrdi rb,r1,THREAD_SHIFT; /* thread_info struct */ \ > + std ra,TI_PPR(rb); /* Save PPR in thread_info */ \ > +END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940)
Why the thread info and not the thread struct ? Cheers, Ben. > +#define RESTORE_PPR(ra,rb) \ > +BEGIN_FTR_SECTION_NESTED(941) > \ > + clrrdi ra,r1,THREAD_SHIFT; \ > + ld rb,TI_PPR(ra); /* Read PPR from thread_info */ \ > + mtspr SPRN_PPR,rb; /* Restore PPR */ \ > +END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941) > + > +#define RESTORE_PPR_PACA(area,ra) \ > +BEGIN_FTR_SECTION_NESTED(942) > \ > + ld ra,area+EX_PPR(r13); \ > + mtspr SPRN_PPR,ra; \ > +END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,942) > + > +#define HMT_MEDIUM_NO_PPR \ > +BEGIN_FTR_SECTION_NESTED(944) > \ > + HMT_MEDIUM; \ > +END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,0,944) /*non P7*/ > + > +#define HMT_MEDIUM_HAS_PPR(area, ra) \ > +BEGIN_FTR_SECTION_NESTED(943) > \ > + mfspr ra,SPRN_PPR; \ > + std ra,area+EX_PPR(r13); \ > + HMT_MEDIUM; \ > +END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,943) /* P7 */ > + > #define __EXCEPTION_PROLOG_1(area, extra, vec) > \ > GET_PACA(r13); \ > std r9,area+EX_R9(r13); /* save r9 - r12 */ \ > diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h > index 6386086..dff2f89 100644 > --- a/arch/powerpc/include/asm/reg.h > +++ b/arch/powerpc/include/asm/reg.h > @@ -284,6 +284,7 @@ > #define SPRN_DBAT6U 0x23C /* Data BAT 6 Upper Register */ > #define SPRN_DBAT7L 0x23F /* Data BAT 7 Lower Register */ > #define SPRN_DBAT7U 0x23E /* Data BAT 7 Upper Register */ > +#define SPRN_PPR 0x380 /* SMT Thread status Register */ > > #define SPRN_DEC 0x016 /* Decrement Register */ > #define SPRN_DER 0x095 /* Debug Enable Regsiter */ _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
