fiasco: use bender, read out comport from BDA

Fix #768

base-fiasco/Makefile

@@ -10,6 +10,16 @@ DOWNLOAD_DIR   = download
 CONTRIB_DIR    = contrib
 FIASCO_ARCHIVE = 3rd_fiasco.tar.bz2
 FIASCO_URI     = http://downloads.sourceforge.net/project/genode/3rd/$(FIASCO_ARCHIVE)
+PATCHES       = $(shell find patches -name *.patch)
+
+#
+# Utility to check if a tool is installed
+#
+check_tool = $(if $(shell which $(1)),,$(error Need to have '$(1)' installed.))
+
+$(call check_tool,wget)
+$(call check_tool,patch)
+$(call check_tool,tar)
 
 #
 # Print help information by default
@@ -33,6 +43,8 @@ $(CONTRIB_DIR): $(DOWNLOAD_DIR)/$(FIASCO_ARCHIVE)
 	$(ECHO) "unpacking source code to '$(CONTRIB_DIR)/'"
 	$(VERBOSE)tar xjf $<
 	$(VERBOSE)mv 3rd $@
+	$(ECHO) "applying patches to '$@/'"
+	$(VERBOSE)for i in $(PATCHES); do patch -d $@ -p0 < $$i; done
 	$(VERBOSE)touch $@
 
 prepare: $(CONTRIB_DIR)

base-fiasco/patches/bda.patch

@@ -0,0 +1,15 @@
+--- fiasco/snapshot/kernel/fiasco/src/kern/kernel_uart.cpp	2008-07-30 13:19:01.000000000 +0200
++++ fiasco/snapshot/kernel/fiasco/src/kern/kernel_uart.cpp	2013-06-10 14:21:54.183996620 +0200
+@@ -72,6 +72,12 @@
+   if (  (s = strstr(cmdline, " -comport "))
+       ||(s = strstr(cmdline, " -comport=")))
+     p = strtoul(s + 10, 0, 0);
++  else
++    {
++      unsigned short bda_comports  = (*((unsigned short *)0x410) >> 9) & 0x7;
++      if (bda_comports)
++        p = *((unsigned short *)0x400);
++    }
+ 
+   if ((s = strstr(cmdline, " -comirq=")))
+     i = strtoul(s + 9, 0, 0);

base-fiasco/run/env

@@ -13,6 +13,7 @@
 #
 proc install_pxe_bootloader_to_run_dir { } {
 	exec cp [genode_dir]/tool/boot/pulsar [run_dir]/boot/pulsar
+	exec cp [genode_dir]/tool/boot/bender [run_dir]/boot/bender
 }
 
 
@@ -141,7 +142,8 @@ proc build_boot_image {binaries} {
 	# Generate pulsar config file
 	#
 	set fh [open "[run_dir]/config-52-54-00-12-34-56" "WRONLY CREAT TRUNC"]
-	puts $fh " exec /fiasco/bootstrap -serial -modaddr=0x02000000"
+	puts $fh " exec /boot/bender"
+	puts $fh " load /fiasco/bootstrap -serial -modaddr=0x02000000"
 	puts $fh " load /fiasco/fiasco -serial -serial_esc -jdb_cmd=JH"
 	puts $fh " load /fiasco/sigma0"
 	puts $fh " load /genode/core"