1 files changed, 111 insertions, 0 deletions
diff --git a/usr.sbin/bhyve/bootrom.c b/usr.sbin/bhyve/bootrom.c
new file mode 100644
index 0000000..5e4e0e9
--- /dev/null
+++ b/usr.sbin/bhyve/bootrom.c
@@ -0,0 +1,111 @@
+/*-
+ * Copyright (c) 2015 Neel Natu <neel@freebsd.org>
+ * 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 THE AUTHOR ``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 THE AUTHOR 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.
+ */
+
+#include <sys/param.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include <machine/vmm.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdbool.h>
+
+#include <vmmapi.h>
+#include "bhyverun.h"
+#include "bootrom.h"
+
+#define	MAX_BOOTROM_SIZE	(16 * 1024 * 1024)	/* 16 MB */
+
+int
+bootrom_init(struct vmctx *ctx, const char *romfile)
+{
+	struct stat sbuf;
+	vm_paddr_t gpa;
+	ssize_t rlen;
+	char *ptr;
+	int fd, i, rv, prot;
+
+	rv = -1;
+	fd = open(romfile, O_RDONLY);
+	if (fd < 0) {
+		fprintf(stderr, "Error opening bootrom \"%s\": %s\n",
+		    romfile, strerror(errno));
+		goto done;
+	}
+
+        if (fstat(fd, &sbuf) < 0) {
+		fprintf(stderr, "Could not fstat bootrom file \"%s\": %s\n",
+		    romfile, strerror(errno));
+		goto done;
+        }
+
+	/*
+	 * Limit bootrom size to 16MB so it doesn't encroach into reserved
+	 * MMIO space (e.g. APIC, HPET, MSI).
+	 */
+	if (sbuf.st_size > MAX_BOOTROM_SIZE || sbuf.st_size < PAGE_SIZE) {
+		fprintf(stderr, "Invalid bootrom size %ld\n", sbuf.st_size);
+		goto done;
+	}
+
+	if (sbuf.st_size & PAGE_MASK) {
+		fprintf(stderr, "Bootrom size %ld is not a multiple of the "
+		    "page size\n", sbuf.st_size);
+		goto done;
+	}
+
+	ptr = vm_create_devmem(ctx, VM_BOOTROM, "bootrom", sbuf.st_size);
+	if (ptr == MAP_FAILED)
+		goto done;
+
+	/* Map the bootrom into the guest address space */
+	prot = PROT_READ | PROT_EXEC;
+	gpa = (1ULL << 32) - sbuf.st_size;
+	if (vm_mmap_memseg(ctx, gpa, VM_BOOTROM, 0, sbuf.st_size, prot) != 0)
+		goto done;
+
+	/* Read 'romfile' into the guest address space */
+	for (i = 0; i < sbuf.st_size / PAGE_SIZE; i++) {
+		rlen = read(fd, ptr + i * PAGE_SIZE, PAGE_SIZE);
+		if (rlen != PAGE_SIZE) {
+			fprintf(stderr, "Incomplete read of page %d of bootrom "
+			    "file %s: %ld bytes\n", i, romfile, rlen);
+			goto done;
+		}
+	}
+	rv = 0;
+done:
+	if (fd >= 0)
+		close(fd);
+	return (rv);
+}