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authorRonald G. Minnich <rminnich@gmail.com>2014-11-26 19:25:47 +0000
committerRonald G. Minnich <rminnich@gmail.com>2014-12-01 19:06:43 +0100
commite0e784a456c4d64e5e88ce578371fe6c538db559 (patch)
tree7557a07ab68659eaf81ac50fc860a288055e0845 /src/mainboard/emulation/qemu-riscv/uart.c
parent796fe068d3c47f873b82c65cc0591f88f87b0a85 (diff)
downloadcoreboot-e0e784a456c4d64e5e88ce578371fe6c538db559.tar.xz
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 <rminnich@gmail.com> Reviewed-on: http://review.coreboot.org/7584 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/mainboard/emulation/qemu-riscv/uart.c')
-rw-r--r--src/mainboard/emulation/qemu-riscv/uart.c60
1 files changed, 60 insertions, 0 deletions
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 <types.h>
+#include <console/uart.h>
+#include <arch/io.h>
+#include <boot/coreboot_tables.h>
+#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