diff options
| author | David Hendricks <dhendrix@chromium.org> | 2012-12-31 17:28:43 -0800 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-01-04 01:36:27 +0100 |
| commit | 6a503b6a0f08bf4236c4c37d75c67182a7af4b02 (patch) | |
| tree | 79aaedcb8283cb543fe47072c839de6f22354d7f /src/include | |
| parent | 10c90d31264b5698320a1ac2666823532d110258 (diff) | |
| download | coreboot-6a503b6a0f08bf4236c4c37d75c67182a7af4b02.tar.xz | |
make early serial console support more generic
This patch makes pre-RAM serial init more generic, particularly for
platforms which do not necessarily need cache-as-RAM in order to use
the serial console and do not have a standard 8250 serial port.
This adds a Kconfig variable to set romstage-* for very early serial
console init. The current method assumes that cache-as-RAM should
enable this, so to maintain compatibility selecting CACHE_AS_RAM will
also select EARLY_SERIAL_CONSOLE.
The UART code structure needs some rework, but the use of ROMCC,
romstage, and then ramstage makes things complex.
uart.h now includes all .h files for all uarts. All 2 of them.
This is actually a simplifying change.
Change-Id: I089e7af633c227baf3c06c685f005e9d0e4b38ce
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2086
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/uart.h | 22 | ||||
| -rw-r--r-- | src/include/uart8250.h | 1 |
2 files changed, 16 insertions, 7 deletions
diff --git a/src/include/uart.h b/src/include/uart.h index 931d6dce82..6628314ae2 100644 --- a/src/include/uart.h +++ b/src/include/uart.h @@ -15,19 +15,29 @@ * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * - * FIXME(dhendrix): This file contains generic prototypes for UART functions. - * The existing headers are too specific to the 8250, so we need a better - * abstraction for use with non-8250 UARTs. */ +/* madness. Uarts are a mess. If you include this file, it + * includes ALL uart implementations which may be needed. + * No need to include them separately, and include this file FIRST. + * At least one (but at most one) of the files needs to define + * uart_init(). + */ #ifndef UART_H #define UART_H +#if CONFIG_CONSOLE_SERIAL8250 +#include <uart8250.h> +#endif + +#if CONFIG_CPU_SAMSUNG_EXYNOS5 +#include <cpu/samsung/exynos5250/uart.h> +#endif + +#ifndef __ROMCC__ unsigned char uart_rx_byte(void); void uart_tx_byte(unsigned char data); void uart_tx_flush(void); - -void uart_init(void); +#endif #endif /* UART_H */ diff --git a/src/include/uart8250.h b/src/include/uart8250.h index b00ff48006..9af43f264b 100644 --- a/src/include/uart8250.h +++ b/src/include/uart8250.h @@ -120,7 +120,6 @@ unsigned char uart8250_rx_byte(unsigned base_port); int uart8250_can_rx_byte(unsigned base_port); void uart8250_tx_byte(unsigned base_port, unsigned char data); void uart8250_tx_flush(unsigned base_port); - /* Yes it is silly to have three different uart init functions. But we used to * have three different sets of uart code, so it's an improvement. */ |