Messages in this thread | | | From | Alistair Popple <> | Subject | Re: [PATCH] powerpc/powernv: Initialise nest mmu | Date | Wed, 14 Sep 2016 15:02:56 +1000 |
| |
On Mon, 15 Aug 2016 04:51:59 PM Alistair Popple wrote: > POWER9 contains an off core mmu called the nest mmu (NMMU). This is > used by other hardware units on the chip to translate virtual > addresses into real addresses. The unit attempting an address > translation provides the majority of the context required for the > translation request except for the base address of the partition table > (ie. the PTCR) which needs to be programmed into the NMMU. > > This patch adds a call to OPAL to set the PTCR for the nest mmu in > opal_init(). > > Signed-off-by: Alistair Popple <alistair@popple.id.au> > --- > > This patch depends on a new OPAL call which has yet to be added to > skiboot, although the patch to do so has been posted to > http://patchwork.ozlabs.org/patch/659106/
This has now gone into skiboot with the same OPAL call number :- https://github.com/open-power/skiboot/commit/84e63a8d4fd9eb3efc872099d579c49fef6a5810
> arch/powerpc/include/asm/opal-api.h | 3 ++- > arch/powerpc/include/asm/opal.h | 1 + > arch/powerpc/platforms/powernv/opal-wrappers.S | 1 + > arch/powerpc/platforms/powernv/opal.c | 3 +++ > 4 files changed, 7 insertions(+), 1 deletion(-) > > diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h > index 0e2e57b..a0aa285 100644 > --- a/arch/powerpc/include/asm/opal-api.h > +++ b/arch/powerpc/include/asm/opal-api.h > @@ -167,7 +167,8 @@ > #define OPAL_INT_EOI 124 > #define OPAL_INT_SET_MFRR 125 > #define OPAL_PCI_TCE_KILL 126 > -#define OPAL_LAST 126 > +#define OPAL_NMMU_SET_PTCR 127 > +#define OPAL_LAST 127 > > /* Device tree flags */ > > diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h > index ee05bd2..433df5e 100644 > --- a/arch/powerpc/include/asm/opal.h > +++ b/arch/powerpc/include/asm/opal.h > @@ -228,6 +228,7 @@ int64_t opal_pci_tce_kill(uint64_t phb_id, uint32_t kill_type, > int64_t opal_rm_pci_tce_kill(uint64_t phb_id, uint32_t kill_type, > uint32_t pe_num, uint32_t tce_size, > uint64_t dma_addr, uint32_t npages); > +int64_t opal_nmmu_set_ptcr(uint64_t chip_id, uint64_t ptcr); > > /* Internal functions */ > extern int early_init_dt_scan_opal(unsigned long node, const char *uname, > diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S > index 3d29d40..a955649 100644 > --- a/arch/powerpc/platforms/powernv/opal-wrappers.S > +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S > @@ -308,3 +308,4 @@ OPAL_CALL(opal_int_eoi, OPAL_INT_EOI); > OPAL_CALL(opal_int_set_mfrr, OPAL_INT_SET_MFRR); > OPAL_CALL(opal_pci_tce_kill, OPAL_PCI_TCE_KILL); > OPAL_CALL_REAL(opal_rm_pci_tce_kill, OPAL_PCI_TCE_KILL); > +OPAL_CALL(opal_nmmu_set_ptcr, OPAL_NMMU_SET_PTCR); > diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c > index 8b4fc68..b533245 100644 > --- a/arch/powerpc/platforms/powernv/opal.c > +++ b/arch/powerpc/platforms/powernv/opal.c > @@ -762,6 +762,9 @@ static int __init opal_init(void) > /* Initialise OPAL kmsg dumper for flushing console on panic */ > opal_kmsg_init(); > > + /* Update partition table control register on all Nest MMUs */ > + opal_nmmu_set_ptcr(-1UL, __pa(partition_tb) | (PATB_SIZE_SHIFT - 12)); > + > return 0; > } > machine_subsys_initcall(powernv, opal_init); > -- > 2.1.4
| |