From e0e784a456c4d64e5e88ce578371fe6c538db559 Mon Sep 17 00:00:00 2001 From: "Ronald G. Minnich" Date: Wed, 26 Nov 2014 19:25:47 +0000 Subject: Add UCB RISCV support for architecture, soc, and emulation mainboard.. Works in the RISCV version of QEMU. Note that the lzmadecode is so unclean that it needs a lot of work. A cleanup is in progress. We decided in Prague to do this as one thing, because it forms a nice case study of the bare minimum you need to add to get a new architecture going in qemu. Change-Id: If5af15c3a70733d219973e0d032746f8ab027e4d Signed-off-by: Ronald G. Minnich Reviewed-on: http://review.coreboot.org/7584 Reviewed-by: Patrick Georgi Tested-by: build bot (Jenkins) --- src/mainboard/emulation/qemu-riscv/uart.c | 60 +++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 src/mainboard/emulation/qemu-riscv/uart.c (limited to 'src/mainboard/emulation/qemu-riscv/uart.c') diff --git a/src/mainboard/emulation/qemu-riscv/uart.c b/src/mainboard/emulation/qemu-riscv/uart.c new file mode 100644 index 0000000000..40192c91fa --- /dev/null +++ b/src/mainboard/emulation/qemu-riscv/uart.c @@ -0,0 +1,60 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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 + */ + +#include +#include +#include +#include +#include "frontend.h" + +static uint8_t *buf = (void *)0x3f8; +uintptr_t uart_platform_base(int idx) +{ + return (uintptr_t) buf; +} + +void uart_init(int idx) +{ +} + +unsigned char uart_rx_byte(int idx) +{ + return *buf; +} + +void uart_tx_byte(int idx, unsigned char data) +{ + *buf = data; +} + +void uart_tx_flush(int idx) +{ +} + +#ifndef __PRE_RAM__ +void uart_fill_lb(void *data) +{ + struct lb_serial serial; + serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED; + serial.baseaddr = 0x3f8; + serial.baud = 115200; + lb_add_serial(&serial, data); + lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data); +} +#endif -- cgit v1.2.3