1 files changed, 121 insertions, 0 deletions
diff --git a/usr/src/cmd/bhyve/pci_uart.c b/usr/src/cmd/bhyve/pci_uart.c
new file mode 100644
index 0000000000..093d0cb361
--- /dev/null
+++ b/usr/src/cmd/bhyve/pci_uart.c
@@ -0,0 +1,121 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2012 NetApp, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <stdio.h>
+
+#include "bhyverun.h"
+#include "pci_emul.h"
+#include "uart_emul.h"
+
+/*
+ * Pick a PCI vid/did of a chip with a single uart at
+ * BAR0, that most versions of FreeBSD can understand:
+ * Siig CyberSerial 1-port.
+ */
+#define COM_VENDOR	0x131f
+#define COM_DEV		0x2000
+
+static void
+pci_uart_intr_assert(void *arg)
+{
+	struct pci_devinst *pi = arg;
+
+	pci_lintr_assert(pi);
+}
+
+static void
+pci_uart_intr_deassert(void *arg)
+{
+	struct pci_devinst *pi = arg;
+
+	pci_lintr_deassert(pi);
+}
+
+static void
+pci_uart_write(struct vmctx *ctx, int vcpu, struct pci_devinst *pi,
+	       int baridx, uint64_t offset, int size, uint64_t value)
+{
+
+	assert(baridx == 0);
+	assert(size == 1);
+
+	uart_write(pi->pi_arg, offset, value);
+}
+
+uint64_t
+pci_uart_read(struct vmctx *ctx, int vcpu, struct pci_devinst *pi,
+	      int baridx, uint64_t offset, int size)
+{
+	uint8_t val;
+
+	assert(baridx == 0);
+	assert(size == 1);
+
+	val = uart_read(pi->pi_arg, offset);
+	return (val);
+}
+
+static int
+pci_uart_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
+{
+	struct uart_softc *sc;
+
+	pci_emul_alloc_bar(pi, 0, PCIBAR_IO, UART_IO_BAR_SIZE);
+	pci_lintr_request(pi);
+
+	/* initialize config space */
+	pci_set_cfgdata16(pi, PCIR_DEVICE, COM_DEV);
+	pci_set_cfgdata16(pi, PCIR_VENDOR, COM_VENDOR);
+	pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_SIMPLECOMM);
+
+	sc = uart_init(pci_uart_intr_assert, pci_uart_intr_deassert, pi);
+	pi->pi_arg = sc;
+
+	if (uart_set_backend(sc, opts) != 0) {
+		fprintf(stderr, "Unable to initialize backend '%s' for "
+		    "pci uart at %d:%d\n", opts, pi->pi_slot, pi->pi_func);
+		return (-1);
+	}
+
+	return (0);
+}
+
+struct pci_devemu pci_de_com = {
+	.pe_emu =	"uart",
+	.pe_init =	pci_uart_init,
+	.pe_barwrite =	pci_uart_write,
+	.pe_barread =	pci_uart_read
+};
+PCI_EMUL_SET(pci_de_com);