On Thu, 2014-05-08 at 22:31 +1000, Anton Blanchard wrote: > HID0 IBM bit 19 is the HILE bit on POWER8. Set it to 0 to take > exceptions in big endian and to 1 to take them in little endian. > > Signed-off-by: Anton Blanchard <an...@samba.org> > ---
Let's stick to the variant involving a FW call instead. Cheers, Ben. > > Index: b/arch/powerpc/include/asm/reg.h > =================================================================== > --- a/arch/powerpc/include/asm/reg.h > +++ b/arch/powerpc/include/asm/reg.h > @@ -397,6 +397,7 @@ > #define SPRN_HASH1 0x3D2 /* Primary Hash Address Register */ > #define SPRN_HASH2 0x3D3 /* Secondary Hash Address Resgister */ > #define SPRN_HID0 0x3F0 /* Hardware Implementation Register 0 */ > +#define HID0_HILE_SH (63 - 19) /* Hypervisor interrupt little endian */ > #define HID0_HDICE_SH (63 - 23) /* 970 HDEC interrupt enable */ > #define HID0_EMCP (1<<31) /* Enable Machine Check pin */ > #define HID0_EBA (1<<29) /* Enable Bus Address Parity */ > Index: b/arch/powerpc/kernel/cpu_setup_power.S > =================================================================== > --- a/arch/powerpc/kernel/cpu_setup_power.S > +++ b/arch/powerpc/kernel/cpu_setup_power.S > @@ -60,6 +60,7 @@ _GLOBAL(__setup_cpu_power8) > bl __init_HFSCR > bl __init_tlb_power8 > bl __init_PMU_HV > + bl __init_HILE > mtlr r11 > blr > > @@ -78,6 +79,7 @@ _GLOBAL(__restore_cpu_power8) > bl __init_HFSCR > bl __init_tlb_power8 > bl __init_PMU_HV > + bl __init_HILE > mtlr r11 > blr > > @@ -132,6 +134,26 @@ __init_HFSCR: > mtspr SPRN_HFSCR,r3 > blr > > +__init_HILE: > + mfspr r3,SPRN_HID0 > + li r4,1 > + sldi r4,r4,HID0_HILE_SH > +#ifdef __LITTLE_ENDIAN__ > + or r3,r3,r4 > +#else > + andc r3,r3,r4 > +#endif > + sync > + mtspr SPRN_HID0,r3 > + mfspr r3,SPRN_HID0 > + mfspr r3,SPRN_HID0 > + mfspr r3,SPRN_HID0 > + mfspr r3,SPRN_HID0 > + mfspr r3,SPRN_HID0 > + mfspr r3,SPRN_HID0 > + isync > + blr > + > /* > * Clear the TLB using the specified IS form of tlbiel instruction > * (invalidate by congruence class). P7 has 128 CCs., P8 has 512. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
