Even for the single core cortex-a7, SMP bit should be set before enabling MMU and cache.
Reference: Cortex A7 r0p5 TRM. section 4.3.31. On Fri, Jan 13, 2017 at 12:41 PM, Icenowy Zheng <icen...@aosc.xyz> wrote: > > > 13.01.2017, 09:34, "Andre Przywara" <andre.przyw...@arm.com>: >> Instead of enumerating all SoC families that need that bit set, let's >> just express this more clearly: The SMP bits needs to be set on >> SMP capable ARMv7 CPUs. It's much easier to Kconfig to express it the >> other way round, so we use ! NO_SMP and ! ARM64. > > How about single-core Cortex-A7? > >> >> Signed-off-by: Andre Przywara <andre.przyw...@arm.com> >> --- >> arch/arm/mach-sunxi/board.c | 5 +---- >> board/sunxi/Kconfig | 6 ++++++ >> 2 files changed, 7 insertions(+), 4 deletions(-) >> >> diff --git a/arch/arm/mach-sunxi/board.c b/arch/arm/mach-sunxi/board.c >> index 58fbacb..5a63124 100644 >> --- a/arch/arm/mach-sunxi/board.c >> +++ b/arch/arm/mach-sunxi/board.c >> @@ -180,10 +180,7 @@ void s_init(void) >> /* No H3 BSP, boot0 seems to not modify SUNXI_SRAMC_BASE + 0x44 */ >> #endif >> >> -#if defined CONFIG_MACH_SUN6I || \ >> - defined CONFIG_MACH_SUN7I || \ >> - defined CONFIG_MACH_SUN8I || \ >> - defined CONFIG_MACH_SUN9I >> +#if !defined(CONFIG_SUNXI_NO_SMP) && !defined(CONFIG_ARM64) >> /* Enable SMP mode for CPU0, by setting bit 6 of Auxiliary Ctl reg >> */ >> asm volatile( >> "mrc p15, 0, r0, c1, c0, 1\n" >> diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig >> index 37b4252..79b6fa7 100644 >> --- a/board/sunxi/Kconfig >> +++ b/board/sunxi/Kconfig >> @@ -27,6 +27,10 @@ config SPL_POWER_SUPPORT >> config SPL_SERIAL_SUPPORT >> default y >> >> +config SUNXI_NO_SMP >> + bool >> + default n >> + >> # Note only one of these may be selected at a time! But hidden choices are >> # not supported by Kconfig >> config SUNXI_GEN_SUN4I >> @@ -50,12 +54,14 @@ choice >> config MACH_SUN4I >> bool "sun4i (Allwinner A10)" >> select CPU_V7 >> + select SUNXI_NO_SMP >> select SUNXI_GEN_SUN4I >> select SUPPORT_SPL >> >> config MACH_SUN5I >> bool "sun5i (Allwinner A13)" >> select CPU_V7 >> + select SUNXI_NO_SMP >> select SUNXI_GEN_SUN4I >> select SUPPORT_SPL >> >> -- >> 2.8.2 > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot