On Tue, Jan 25, 2022 at 10:22 AM Bin Meng bmeng.cn@gmail.com wrote:
On Sat, Jan 15, 2022 at 12:20 AM Anup Patel apatel@ventanamicro.com wrote:
Quite a few RISC-V emulators and ISS (including Spike) have host transfer interface (HTIF) based console. This patch adds HTIF based console driver for RISC-V platforms which depends totally on DT node for HTIF register base address.
Signed-off-by: Anup Patel apatel@ventanamicro.com Reviewed-by: Philipp Tomsich philipp.tomsich@vrull.eu
drivers/serial/Kconfig | 8 ++ drivers/serial/Makefile | 1 + drivers/serial/serial_htif.c | 178 +++++++++++++++++++++++++++++++++++ 3 files changed, 187 insertions(+) create mode 100644 drivers/serial/serial_htif.c
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 6c8fdda9a0..345d1881f5 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -866,6 +866,14 @@ config PXA_SERIAL If you have a machine based on a Marvell XScale PXA2xx CPU you can enable its onboard serial ports by enabling this option.
+config HTIF_CONSOLE
bool "RISC-V HTIF console support"depends on DM_SERIAL && 64BITDoes this driver not work on 32-bit?
Only putc() works but getc() does not work on 32-bit. Same issue is there with OpenSBI and BBL as well. That's why I have restricted this driver to 64-bit only.
helpSelect this to enable host transfer interface (HTIF) based serialconsole. The HTIF device is quite common in RISC-V emulators andRISC-V ISS so this driver allows using U-Boot on such platforms.config SIFIVE_SERIAL bool "SiFive UART support" depends on DM_SERIAL
Regards, Bin
Regards, Anup