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| author | Raul E Rangel <rrangel@chromium.org> | 2022-02-03 15:25:48 -0700 |
|---|---|---|
| committer | Raul Rangel <rrangel@chromium.org> | 2022-02-08 16:18:07 +0000 |
| commit | 1828a541f158b0c518a4f6cfef6108a1fc4b885b (patch) | |
| tree | 9ce6116eff798366e40ce5887e6a6e992ed6a08f | |
| parent | e9665959edeba6ae2d5364c4f7339704b6b6fd42 (diff) | |
soc/amd/cezanne/psp_verstage: Implement get_uart_base
This will allow directly using the UART console. On PSP releases that
don't support mapping the UART, we will just return NULL which is
perfectly acceptable.
BUG=b:215599230
TEST=Boot guybrush and verify verstage can print to the console
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Ic8d7f0fe00794a715756f92e3fb32c6b512cb8aa
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61607
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/soc/amd/cezanne/psp_verstage/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/amd/cezanne/psp_verstage/uart.c | 26 |
2 files changed, 27 insertions, 0 deletions
diff --git a/src/soc/amd/cezanne/psp_verstage/Makefile.inc b/src/soc/amd/cezanne/psp_verstage/Makefile.inc index ea9353d444..547650dcc6 100644 --- a/src/soc/amd/cezanne/psp_verstage/Makefile.inc +++ b/src/soc/amd/cezanne/psp_verstage/Makefile.inc @@ -9,6 +9,7 @@ subdirs-$(CONFIG_VBOOT_STARTS_BEFORE_BOOTBLOCK) += ../../common/psp_verstage verstage-y += svc.c verstage-y += chipset.c +verstage-y += uart.c verstage-y += $(top)/src/vendorcode/amd/fsp/cezanne/bl_uapp/bl_uapp_startup.S verstage-y += $(top)/src/vendorcode/amd/fsp/cezanne/bl_uapp/bl_uapp_end.S diff --git a/src/soc/amd/cezanne/psp_verstage/uart.c b/src/soc/amd/cezanne/psp_verstage/uart.c new file mode 100644 index 0000000000..0f0baba07e --- /dev/null +++ b/src/soc/amd/cezanne/psp_verstage/uart.c @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <bl_uapp/bl_syscall_public.h> +#include <amdblocks/uart.h> +#include <types.h> + +static void *uart_bars[FCH_UART_ID_MAX - 1]; + +uintptr_t get_uart_base(unsigned int idx) +{ + uint32_t err; + + if (idx > ARRAY_SIZE(uart_bars)) + return 0; + + if (uart_bars[idx]) + return (uintptr_t)uart_bars[idx]; + + err = svc_map_fch_dev(FCH_IO_DEVICE_UART, idx, 0, &uart_bars[idx]); + if (err) { + svc_debug_print("Failed to map UART\n"); + return 0; + } + + return (uintptr_t)uart_bars[idx]; +} |