On 04/03/2014 09:18 PM, Alex Elder wrote: > This patch adds SMP support for BCM281XX and BCM21664 family SoCs. > > This feature is controlled with a distinct config option such that a > SMP-enabled multi-v7 binary can be configured to run these SoCs in > uniprocessor mode. Since this SMP functionality is used for > multiple Broadcom mobile chip families the config option is called > ARCH_BCM_MOBILE_SMP (for lack of a better name). > > On SoCs of this type, the secondary core is not held in reset on > power-on. Instead it loops in a ROM-based holding pen. To release > it, one must write into a special register a jump address whose > low-order bits have been replaced with a secondary core's id, then > trigger an event with SEV. On receipt of an event, the ROM code > will examine the register's contents, and if the low-order bits > match its cpu id, it will clear them and write the value back to the > register just prior to jumping to the address specified. > > The location of the special register is defined in the device tree > using a "secondary-boot-reg" property in a node whose "enable-method" > matches. > > Derived from code originally provided by Ray Jui <rjui@xxxxxxxxxxxx> > > Signed-off-by: Alex Elder <elder@xxxxxxxxxx> > --- . . . > diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile > index b2279e3..929579f 100644 > --- a/arch/arm/mach-bcm/Makefile > +++ b/arch/arm/mach-bcm/Makefile > @@ -15,7 +15,10 @@ obj-$(CONFIG_ARCH_BCM_281XX) += board_bcm281xx.o > plus_sec := $(call as-instr,.arch_extension sec,+sec) > > # BCM21664 > -obj-$(CONFIG_ARCH_BCM_21664) += board_bcm21664.o > +obj-$(CONFIG_ARCH_BCM_21664) := board_bcm21664.o The above was a mistake, it should still be +=. (I'll fix it.) . . . -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
