diff options
| author | Fred Reitberger <reitbergerfred@gmail.com> | 2023-02-01 16:00:54 -0500 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-02-09 10:01:20 +0000 |
| commit | a02176debb88a6e838c3b5f888010ae138b79127 (patch) | |
| tree | 3b2df0135653dc16ca2a20e1d5d758d258159f60 /src/soc | |
| parent | d7b7460d6e8a9fbd32c41e91a9d00dc536953310 (diff) | |
console: Add SimNow console logging
The AMD SimNow tool supports fast logging through an IO port. Add a new
console to support SimNow logging through port 80.
TEST=observe significant speed improvements on SimNow console log
Signed-off-by: Fred Reitberger <reitbergerfred@gmail.com>
Change-Id: I42a431f48ea14ba4adacbd4a32e15abe7c5e4951
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72751
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/amd/common/block/simnow/Makefile.inc | 7 | ||||
| -rw-r--r-- | src/soc/amd/common/block/simnow/simnow_console.c | 24 |
2 files changed, 31 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/simnow/Makefile.inc b/src/soc/amd/common/block/simnow/Makefile.inc new file mode 100644 index 0000000000..2cd79c899f --- /dev/null +++ b/src/soc/amd/common/block/simnow/Makefile.inc @@ -0,0 +1,7 @@ +## SPDX-License-Identifier: GPL-2.0-only + +ifeq ($(CONFIG_CONSOLE_AMD_SIMNOW),y) +all-y += simnow_console.c + +smm-$(CONFIG_DEBUG_SMI) += simnow_console.c +endif diff --git a/src/soc/amd/common/block/simnow/simnow_console.c b/src/soc/amd/common/block/simnow/simnow_console.c new file mode 100644 index 0000000000..478674ad1f --- /dev/null +++ b/src/soc/amd/common/block/simnow/simnow_console.c @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <arch/io.h> +#include <console/console.h> +#include <console/simnow.h> + +#define AMD_SIMNOW_PORT 0x80 +#define AMD_SIMNOW_PORT_DATA_BEGIN 0x5f535452ul +#define AMD_SIMNOW_PORT_DATA_END 0x5f454e44ul + +void simnow_console_init(void) +{ + outl(AMD_SIMNOW_PORT_DATA_BEGIN, AMD_SIMNOW_PORT); +} + +void simnow_console_tx_byte(unsigned char data) +{ + outb(data, AMD_SIMNOW_PORT); + + if (data == '\n') { + outl(AMD_SIMNOW_PORT_DATA_END, AMD_SIMNOW_PORT); + outl(AMD_SIMNOW_PORT_DATA_BEGIN, AMD_SIMNOW_PORT); + } +} |