When CPU's come out of reset they are in secure state supervisor mode, so this is the state Linux kernel entry point is called in when it brings up secondary CPU cores or the primary CPU restarts after power management has sent it through an off/on transition.
As U-Boot starts the kernel in hypervisor mode and the kernel expects and checks that CPUs start in the same state as initial boot this results in a dead system. Specifically, it crashes early in boot when the primary CPU runs the MCPM test [1] and even if power management features are disabled it will still refuse to bring up any secondary CPUs.
Fix this problem by removing U-Boot support for virt and nonsec support on TC2.
[1] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=35...
Signed-off-by: Jon Medhurst tixy@linaro.org --- arch/arm/Kconfig | 2 -- board/armltd/vexpress/vexpress_common.c | 15 --------------- 2 files changed, 17 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index e9d2fc9..2e48568 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -293,8 +293,6 @@ config ARCH_BCM283X config TARGET_VEXPRESS_CA15_TC2 bool "Support vexpress_ca15_tc2" select CPU_V7 - select CPU_V7_HAS_NONSEC - select CPU_V7_HAS_VIRT
config TARGET_VEXPRESS_CA5X2 bool "Support vexpress_ca5x2" diff --git a/board/armltd/vexpress/vexpress_common.c b/board/armltd/vexpress/vexpress_common.c index d3b3b31..fe5d163 100644 --- a/board/armltd/vexpress/vexpress_common.c +++ b/board/armltd/vexpress/vexpress_common.c @@ -180,18 +180,3 @@ void lowlevel_init(void) ulong get_board_rev(void){ return readl((u32 *)SYS_ID); } - -#ifdef CONFIG_ARMV7_NONSEC -/* Setting the address at which secondary cores start from. - * Versatile Express uses one address for all cores, so ignore corenr - */ -void smp_set_core_boot_addr(unsigned long addr, int corenr) -{ - /* The SYSFLAGS register on VExpress needs to be cleared first - * by writing to the next address, since any writes to the address - * at offset 0 will only be ORed in - */ - writel(~0, CONFIG_SYSFLAGS_ADDR + 4); - writel(addr, CONFIG_SYSFLAGS_ADDR); -} -#endif