On 11/03/2015 11:24 PM, Prabhakar Kushwaha wrote: > If the core runs at higher than x3 speed of the platform, there is > possiblity about sev instruction to getting missed by other cores. > This is because of SoC Run Control block may not able to sample > the EVENTI(Sev) signals. > > Configure Run Control and EPU to periodically send out EVENTI signals to > wake up A57 cores. > > Signed-off-by: Prabhakar Kushwaha <[email protected]> > --- > Chages for v2: Updated description > > arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 6 ++++ > arch/arm/cpu/armv8/fsl-layerscape/soc.c | 39 > +++++++++++++++++++++++ > arch/arm/include/asm/arch-fsl-layerscape/config.h | 9 ++++++ > arch/arm/include/asm/arch-fsl-layerscape/soc.h | 3 ++ > 4 files changed, 57 insertions(+) > > diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c > b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c > index 0cb0afa..dbb12c2 100644 > --- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c > +++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c > @@ -484,7 +484,13 @@ int arch_early_init_r(void) > { > #ifdef CONFIG_MP > int rv = 1; > +#endif > + > +#ifdef CONFIG_SYS_FSL_ERRATUM_A009635 > + erratum_a009635(); > +#endif > > +#ifdef CONFIG_MP > rv = fsl_layerscape_wake_seconday_cores(); > if (rv) > printf("Did not wake secondary cores\n"); > diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c > b/arch/arm/cpu/armv8/fsl-layerscape/soc.c > index 637853d..e8cdb10 100644 > --- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c > +++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c > @@ -9,10 +9,49 @@ > #include <asm/arch/soc.h> > #include <asm/io.h> > #include <asm/global_data.h> > +#include <asm/arch-fsl-layerscape/config.h> > > DECLARE_GLOBAL_DATA_PTR; > > #ifdef CONFIG_LS2085A > +#ifdef CONFIG_SYS_FSL_ERRATUM_A009635 > +#define PLATFORM_CYCLE_ENV_VAR "a009635_interval_val" > + > +static unsigned long get_internval_val_mhz(void) > +{ > + char *interval = getenv(PLATFORM_CYCLE_ENV_VAR);
Why do you need a variable to override the calculation? > + ulong interval_mhz = get_bus_freq(0) / (1000 * 1000); Please add a comment here to explain what the interval does and why it is calculated this way. York _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
