From e43d6ed932a4fbeb4c53a66bd2b7fc1f802a810e Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sat, 5 Nov 2011 03:56:49 +0000 Subject: [PATCH] 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 ++++++ board/nvidia/common/board.c | 3 --- board/nvidia/common/board.h | 1 - include/configs/tegra2-common.h | 1 + 5 files changed, 22 insertions(+), 4 deletions(-) diff --git a/arch/arm/cpu/armv7/tegra2/board.c b/arch/arm/cpu/armv7/tegra2/board.c index 751102d180..4530194bf7 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 96c07955aa..f84fdc8f94 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 diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c index 0f12de2097..56850cc8b5 100644 --- a/board/nvidia/common/board.c +++ b/board/nvidia/common/board.c @@ -125,9 +125,6 @@ int board_early_init_f(void) /* Initialize periph GPIOs */ gpio_config_uart(); - - /* Init UART, scratch regs, and start CPU */ - tegra2_start(); return 0; } #endif /* EARLY_INIT */ diff --git a/board/nvidia/common/board.h b/board/nvidia/common/board.h index 35acbca82b..1f57086602 100644 --- a/board/nvidia/common/board.h +++ b/board/nvidia/common/board.h @@ -24,7 +24,6 @@ #ifndef _BOARD_H_ #define _BOARD_H_ -void tegra2_start(void); void gpio_config_uart(void); int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio); diff --git a/include/configs/tegra2-common.h b/include/configs/tegra2-common.h index 9c3b9fa3e9..16debf6257 100644 --- a/include/configs/tegra2-common.h +++ b/include/configs/tegra2-common.h @@ -35,6 +35,7 @@ #define CONFIG_SYS_CACHELINE_SIZE 32 +#define CONFIG_ARCH_CPU_INIT /* Fire up the A9 core */ #define CONFIG_ENABLE_CORTEXA9 /* enable CPU (A9 complex) */ #include /* get chip and board defs */ -- 2.30.2