Merge pull request #305 from pder/bare-metal-no-serial-console

Boot Fiwix and Linux without serial console on bare metal

rootfs.py

@@ -36,6 +36,7 @@ def create_configuration_file(args):
         config.write(f"UPDATE_CHECKSUMS={args.update_checksums}\n")
         config.write(f"JOBS={args.cores}\n")
         config.write(f"INTERNAL_CI={args.internal_ci}\n")
+        config.write(f"BARE_METAL={args.bare_metal}\n")
         if (args.bare_metal or args.qemu) and not args.kernel:
             config.write("DISK=sda\n")
             config.write("KERNEL_BOOTSTRAP=True\n")

sysa/kexec-fiwix/kexec-fiwix.checksums

@@ -1 +1 @@
-4f78914aef30b569a531102998e52a0514d8836204d57ff42bf0a3324968f247  /usr/bin/kexec-fiwix
+7c0d280b732b8dfe767cacefc0245698796d953083ab4bcccfcb77f6d4fc4828  /usr/bin/kexec-fiwix

sysa/kexec-fiwix/src/kexec-fiwix.c

@@ -77,7 +77,16 @@ int main() {
 	puts("Preparing multiboot info for kernel...");
 
 	char cmdline[256];
-	sprintf(cmdline, "fiwix console=/dev/ttyS0 root=/dev/ram0 ramdisksize=%d initrd=sysa.ext2 kexec_proto=linux kexec_size=67000 kexec_cmdline=\"init=/init console=ttyS0\"", INITRD_MB * 1024);
+	/* Don't use a serial console if configured for bare metal */
+	char *bare_metal = getenv("BARE_METAL");
+	if (bare_metal != NULL && strcmp(bare_metal, "True") == 0)
+	{
+		sprintf(cmdline, "fiwix root=/dev/ram0 ramdisksize=%d initrd=sysa.ext2 kexec_proto=linux kexec_size=67000 kexec_cmdline=\"init=/init\"", INITRD_MB * 1024);
+	}
+	else
+	{
+		sprintf(cmdline, "fiwix console=/dev/ttyS0 root=/dev/ram0 ramdisksize=%d initrd=sysa.ext2 kexec_proto=linux kexec_size=67000 kexec_cmdline=\"init=/init console=ttyS0\"", INITRD_MB * 1024);
+	}
 	char * boot_loader_name = "kexec-fiwix";
 
 	unsigned int next_avail_mem = 0x9800;

sysa/run2.sh

@@ -33,9 +33,15 @@ go_sysb() {
         mount -t proc proc /proc
         # kexec time
         echo "Loading kernel + sysb initramfs using kexec"
-        kexec -l "/boot/linux-4.9.10" --console-serial \
-            --initrd="/boot/initramfs-sysb.cpio.gz" \
-            --append="init=/init console=ttyS0"
+        if [ "${BARE_METAL}" = True ]; then
+            kexec -l "/boot/linux-4.9.10" \
+                --initrd="/boot/initramfs-sysb.cpio.gz" \
+                --append="init=/init"
+        else
+            kexec -l "/boot/linux-4.9.10" --console-serial \
+                --initrd="/boot/initramfs-sysb.cpio.gz" \
+                --append="init=/init console=ttyS0"
+        fi
         echo "kexecing into sysb"
         kexec -e
     fi