Hung-Te Lin (hungte@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2308
-gerrit
commit bdc0af083104286a3601e045802155c760b7098e Author: Hung-Te Lin hungte@chromium.org Date: Thu Feb 7 21:38:41 2013 +0800
armv7/snow: Move clock initialization from bootblock to romstage.
Exynos system clock can be initialized before RAM init, not necessary to be in the very beginning (boot block). This helps reducing bootblock dependency.
Verified to boot on armv7/snow.
Change-Id: Ic863e222871a157ba4279a673775b1e18c6eac0d Signed-off-by: Hung-Te Lin hungte@chromium.org --- src/mainboard/google/snow/Makefile.inc | 4 ---- src/mainboard/google/snow/bootblock.c | 11 +---------- src/mainboard/google/snow/romstage.c | 9 ++++++++- 3 files changed, 9 insertions(+), 15 deletions(-)
diff --git a/src/mainboard/google/snow/Makefile.inc b/src/mainboard/google/snow/Makefile.inc index 04bf543..b56a1a4 100644 --- a/src/mainboard/google/snow/Makefile.inc +++ b/src/mainboard/google/snow/Makefile.inc @@ -17,10 +17,6 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ##
-# needed for system_clock_init() -bootblock-y += mainboard.c -bootblock-y += memory.c - romstage-y += mainboard.c romstage-y += memory.c romstage-y += romstage.c diff --git a/src/mainboard/google/snow/bootblock.c b/src/mainboard/google/snow/bootblock.c index bcfe440..18306cc 100644 --- a/src/mainboard/google/snow/bootblock.c +++ b/src/mainboard/google/snow/bootblock.c @@ -23,23 +23,14 @@ #include <cbfs.h> #include <uart.h> #include <console/console.h> -#include <cpu/samsung/exynos5250/clk.h> -#include <cpu/samsung/exynos5250/dmc.h> #include <cpu/samsung/exynos5250/periph.h> -#include <cpu/samsung/exynos5250/clock_init.h> +#include <cpu/samsung/exynos5250/pinmux.h>
#endif
void bootblock_mainboard_init(void); void bootblock_mainboard_init(void) { - struct mem_timings *mem; - struct arm_clk_ratios *arm_ratios; - - mem = get_mem_timings(); - arm_ratios = get_arm_clk_ratios(); - system_clock_init(mem, arm_ratios); - #if CONFIG_EARLY_SERIAL_CONSOLE exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE); uart_init(); diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c index b8e5116..c0bb6f4 100644 --- a/src/mainboard/google/snow/romstage.c +++ b/src/mainboard/google/snow/romstage.c @@ -26,6 +26,7 @@
#include <cpu/samsung/exynos5250/dmc.h> #include <cpu/samsung/exynos5250/setup.h> +#include <cpu/samsung/exynos5250/clock_init.h>
#include <console/console.h> #include <arch/stages.h> @@ -48,13 +49,19 @@ static int board_wakeup_permitted(void) void main(void) { struct mem_timings *mem; + struct arm_clk_ratios *arm_ratios; int ret; void *entry;
+ /* Clock must be initialized before console_init, otherwise you may need + * to re-initialize serial console drivers again. */ + mem = get_mem_timings(); + arm_ratios = get_arm_clk_ratios(); + system_clock_init(mem, arm_ratios); + console_init(); printk(BIOS_INFO, "hello from romstage\n");
- mem = get_mem_timings(); if (!mem) { printk(BIOS_CRIT, "Unable to auto-detect memory timings\n"); while(1);