ARM: Separate the early console (romstage) from the bootblock console.

It might be that you want an early console in romstage before RAM is up, but
you can't or don't want to support the console all the way back in the
bootblock. By making the console in those two different environments
configurable seperately that becomes possible.

On the 5250 console output as early as the bootblock works, but on the 5420 it
only starts working in the ROM stage after clocks have been initialized.

Change-Id: I68ae3fcb4d828fa8a328a30001c23c81a4423bb8
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3671
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

10 files changed, 31 insertions, 18 deletions

diff --git a/src/arch/armv7/Makefile.inc b/src/arch/armv7/Makefile.inc
index 8474315458..1a328c4f18 100644
--- a/src/arch/armv7/Makefile.inc
+++ b/src/arch/armv7/Makefile.inc
@@ -163,7 +163,7 @@ $(obj)/mainboard/$(MAINBOARDDIR)/romstage.pre.inc: $(src)/mainboard/$(MAINBOARDD
 ramstage-y += exception.c
 ramstage-y += exception_asm.S
 
-bootblock-$(CONFIG_EARLY_CONSOLE) += early_console.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += early_console.c
 bootblock-y += cache.c
 
 romstage-y += cache.c
diff --git a/src/arch/armv7/bootblock_simple.c b/src/arch/armv7/bootblock_simple.c
index 5d0fe7ecaa..541175cc8a 100644
--- a/src/arch/armv7/bootblock_simple.c
+++ b/src/arch/armv7/bootblock_simple.c
@@ -68,7 +68,7 @@ void main(void)
 		bootblock_mainboard_init();
 	}
 
-#ifdef CONFIG_EARLY_CONSOLE
+#ifdef CONFIG_BOOTBLOCK_CONSOLE
 	console_init();
 #endif
 
diff --git a/src/console/Kconfig b/src/console/Kconfig
index dc41fd36b2..f62cfdd1b1 100644
--- a/src/console/Kconfig
+++ b/src/console/Kconfig
@@ -1,5 +1,15 @@
 menu "Console"
 
+config DEFAULT_BOOTBLOCK_CONSOLE
+	bool
+	default n
+
+config BOOTBLOCK_CONSOLE
+	bool "Enable early (bootblock) console output."
+	default DEFAULT_BOOTBLOCK_CONSOLE
+	help
+	  Use console during the bootblock if supported
+
 config DEFAULT_EARLY_CONSOLE
 	bool
 	default n
diff --git a/src/console/Makefile.inc b/src/console/Makefile.inc
index ed2287e85f..9edec3ccff 100644
--- a/src/console/Makefile.inc
+++ b/src/console/Makefile.inc
@@ -14,7 +14,7 @@ romstage-y += console.c
 romstage-y += post.c
 romstage-y += die.c
 
-bootblock-$(CONFIG_EARLY_CONSOLE) += vtxprintf.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += vtxprintf.c
 bootblock-y += console.c
 bootblock-y += die.c
 
diff --git a/src/console/console.c b/src/console/console.c
index 2f7de02655..c53adc6a1e 100644
--- a/src/console/console.c
+++ b/src/console/console.c
@@ -101,7 +101,8 @@ int console_tst_byte(void)
 
 void console_init(void)
 {
-#if CONFIG_EARLY_CONSOLE
+#if defined(__BOOT_BLOCK__) && CONFIG_BOOTBLOCK_CONSOLE || \
+    !defined(__BOOT_BLOCK__) && CONFIG_EARLY_CONSOLE
 
 #if CONFIG_USBDEBUG
 	enable_usbdebug(CONFIG_USBDEBUG_DEFAULT_PORT);
diff --git a/src/cpu/samsung/Kconfig b/src/cpu/samsung/Kconfig
index 3b6df9ec61..54f4ed1a21 100644
--- a/src/cpu/samsung/Kconfig
+++ b/src/cpu/samsung/Kconfig
@@ -2,6 +2,7 @@ config CPU_SAMSUNG_EXYNOS5250
 	depends on ARCH_ARMV7
 	select HAVE_MONOTONIC_TIMER
 	select HAVE_UART_SPECIAL
+	select DEFAULT_BOOTBLOCK_CONSOLE
 	select DEFAULT_EARLY_CONSOLE
 	bool
 	default n
diff --git a/src/cpu/samsung/exynos5250/Makefile.inc b/src/cpu/samsung/exynos5250/Makefile.inc
index dcc783dc2e..663f5329dd 100644
--- a/src/cpu/samsung/exynos5250/Makefile.inc
+++ b/src/cpu/samsung/exynos5250/Makefile.inc
@@ -6,14 +6,14 @@ INTERMEDIATE += exynos5250_add_bl1
 bootblock-y += spi.c
 bootblock-y += pinmux.c mct.c power.c
 # Clock is required for UART
-bootblock-$(CONFIG_EARLY_CONSOLE) += clock_init.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += clock.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += monotonic_timer.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += uart.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += clock_init.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += clock.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += monotonic_timer.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
 bootblock-y += wakeup.c
 bootblock-y += gpio.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += pwm.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += timer.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += pwm.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += timer.c
 
 romstage-y += spi.c
 romstage-y += clock.c
diff --git a/src/cpu/samsung/exynos5420/Makefile.inc b/src/cpu/samsung/exynos5420/Makefile.inc
index c3416c4cf7..1dddd21ebd 100644
--- a/src/cpu/samsung/exynos5420/Makefile.inc
+++ b/src/cpu/samsung/exynos5420/Makefile.inc
@@ -6,14 +6,14 @@ INTERMEDIATE += exynos5420_add_bl1
 bootblock-y += spi.c
 bootblock-y += pinmux.c mct.c power.c
 # Clock is required for UART
-bootblock-$(CONFIG_EARLY_CONSOLE) += clock_init.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += clock.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += monotonic_timer.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += uart.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += clock_init.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += clock.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += monotonic_timer.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
 bootblock-y += wakeup.c
 bootblock-y += gpio.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += pwm.c
-bootblock-$(CONFIG_EARLY_CONSOLE) += timer.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += pwm.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += timer.c
 
 romstage-y += spi.c
 romstage-y += clock.c
diff --git a/src/include/console/console.h b/src/include/console/console.h
index 9112f35c9b..2f5f18ef50 100644
--- a/src/include/console/console.h
+++ b/src/include/console/console.h
@@ -77,7 +77,8 @@ void mainboard_post(u8 value);
 void __attribute__ ((noreturn)) die(const char *msg);
 int do_printk(int msg_level, const char *fmt, ...) __attribute__((format(printf, 2, 3)));
 
-#if defined(__PRE_RAM__) && !CONFIG_EARLY_CONSOLE
+#if defined(__BOOT_BLOCK__) && !CONFIG_BOOTBLOCK_CONSOLE || \
+    (defined(__PRE_RAM__) && !defined(__BOOT_BLOCK__)) && !CONFIG_EARLY_CONSOLE
 
 static inline void printk(int LEVEL, const char *fmt, ...);
 static inline void printk(int LEVEL, const char *fmt, ...) {
diff --git a/src/mainboard/emulation/qemu-armv7/Makefile.inc b/src/mainboard/emulation/qemu-armv7/Makefile.inc
index 46ecfed9cd..431d9ab865 100644
--- a/src/mainboard/emulation/qemu-armv7/Makefile.inc
+++ b/src/mainboard/emulation/qemu-armv7/Makefile.inc
@@ -22,6 +22,6 @@ bootblock-y += timer.c
 romstage-y += timer.c
 ramstage-y += timer.c
 
-bootblock-$(CONFIG_EARLY_CONSOLE) += uart.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
 romstage-$(CONFIG_EARLY_CONSOLE) += uart.c
 ramstage-y += uart.c