On Sun, Jun 19, 2016 at 12:38 PM, Chen-Yu Tsai <w...@csie.org> wrote: > Now that we have a data section, add helper functions to save and fetch > per-CPU target PC. > > Signed-off-by: Chen-Yu Tsai <w...@csie.org> > --- > arch/arm/cpu/armv7/Makefile | 1 + > arch/arm/cpu/armv7/psci-common.c | 39 +++++++++++++++++++++++++++++++++++++++ > arch/arm/include/asm/psci.h | 4 ++++ > 3 files changed, 44 insertions(+) > create mode 100644 arch/arm/cpu/armv7/psci-common.c > > diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile > index 328c4b10e976..730b59986a01 100644 > --- a/arch/arm/cpu/armv7/Makefile > +++ b/arch/arm/cpu/armv7/Makefile > @@ -26,6 +26,7 @@ endif > > ifneq ($(CONFIG_ARMV7_PSCI),) > obj-y += psci.o > +obj-y += psci-common.o
The Makefile was updated, this patch doen't apply today, but only a minor change is needed. > endif > > obj-$(CONFIG_IPROC) += iproc-common/ > diff --git a/arch/arm/cpu/armv7/psci-common.c > b/arch/arm/cpu/armv7/psci-common.c > new file mode 100644 > index 000000000000..d14b6937473f > --- /dev/null > +++ b/arch/arm/cpu/armv7/psci-common.c > @@ -0,0 +1,39 @@ > +/* > + * Common PSCI functions > + * > + * Copyright (C) 2016 Chen-Yu Tsai > + * Author: Chen-Yu Tsai <w...@csie.org> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program. If not, see <http://www.gnu.org/licenses/>. > + */ > + > +#include <config.h> > +#include <asm/armv7.h> > +#include <asm/macro.h> > +#include <asm/psci.h> > +#include <asm/secure.h> > +#include <linux/linkage.h> > + > +static u32 psci_target_pc[CONFIG_ARMV7_PSCI_NR_CPUS] __secure_data = { 0 }; > + > +void __secure psci_save_target_pc(int cpu, u32 pc) > +{ > + psci_target_pc[cpu] = pc; > + DSB; > +} > + > +u32 __secure psci_get_target_pc(int cpu) > +{ > + return psci_target_pc[cpu]; > +} > + > diff --git a/arch/arm/include/asm/psci.h b/arch/arm/include/asm/psci.h > index dab576997654..a0da02300700 100644 > --- a/arch/arm/include/asm/psci.h > +++ b/arch/arm/include/asm/psci.h > @@ -54,6 +54,10 @@ > #ifndef __ASSEMBLY__ > #include <asm/types.h> > > +/* These 2 helper functions assume cpu < CONFIG_ARMV7_PSCI_NR_CPUS */ > +u32 psci_get_target_pc(int cpu); > +void psci_save_target_pc(int cpu, u32 pc); > + > void psci_cpu_entry(void); > u32 psci_get_cpu_id(void); > u32 psci_get_cpu_stack_top(int cpu); > -- > 2.8.1 > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
