From e43d6ed932a4fbeb4c53a66bd2b7fc1f802a810e Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sat, 5 Nov 2011 03:56:49 +0000 Subject: tegra2: Add arch_cpu_init() to fire up Cortex-A9 We want to move away from a special Tegra2 start-up, and just use arch_cpu_init() instead. However, if we run board_init_f() from boot we need to build it for ARMv4T, since the Tegra's AVP start-up CPU does not support ARMv7. The effect of this is to do the AVP init earlier, and in arch_cpu_init(), rather that board_early_init_f(). Signed-off-by: Simon Glass Signed-off-by: Tom Warren --- arch/arm/cpu/armv7/tegra2/board.c | 15 +++++++++++++++ arch/arm/cpu/armv7/tegra2/config.mk | 6 ++++++ 2 files changed, 21 insertions(+) (limited to 'arch/arm/cpu') diff --git a/arch/arm/cpu/armv7/tegra2/board.c b/arch/arm/cpu/armv7/tegra2/board.c index 751102d..4530194 100644 --- a/arch/arm/cpu/armv7/tegra2/board.c +++ b/arch/arm/cpu/armv7/tegra2/board.c @@ -23,6 +23,7 @@ #include #include +#include "ap20.h" #include #include #include @@ -86,3 +87,17 @@ int checkboard(void) return 0; } #endif /* CONFIG_DISPLAY_BOARDINFO */ + +#ifdef CONFIG_ARCH_CPU_INIT +/* + * Note this function is executed by the ARM7TDMI AVP. It does not return + * in this case. It is also called once the A9 starts up, but does nothing in + * that case. + */ +int arch_cpu_init(void) +{ + /* Fire up the Cortex A9 */ + tegra2_start(); + return 0; +} +#endif diff --git a/arch/arm/cpu/armv7/tegra2/config.mk b/arch/arm/cpu/armv7/tegra2/config.mk index 96c0795..f84fdc8 100644 --- a/arch/arm/cpu/armv7/tegra2/config.mk +++ b/arch/arm/cpu/armv7/tegra2/config.mk @@ -26,3 +26,9 @@ # Use ARMv4 for Tegra2 - initial code runs on the AVP, which is an ARM7TDI. PLATFORM_CPPFLAGS += -march=armv4 + +# Tegra has an ARMv4T CPU which runs board_init_f(), so we must build this +# file with compatible flags +ifdef CONFIG_TEGRA2 +CFLAGS_arch/arm/lib/board.o += -march=armv4t +endif -- cgit v1.1