u-boot-extra.inc: Rework MicroBlaze config.mk generation

* Rework the config.mk for MicroBlaze into a seperate task
* Change to using a python task for better handling of content and
  parsing of the xparameters file

Signed-off-by: Nathan Rossi <nathan.rossi@xilinx.com>

1 files changed, 36 insertions, 23 deletions

diff --git a/recipes-bsp/u-boot/u-boot-extra.inc b/recipes-bsp/u-boot/u-boot-extra.inc
index b7569864..4301bb46 100644
--- a/recipes-bsp/u-boot/u-boot-extra.inc
+++ b/recipes-bsp/u-boot/u-boot-extra.inc
@@ -13,27 +13,40 @@ UBOOT_XPARAMETERS ?= "${@expand_workdir_paths("MACHINE_XPARAMETERS", d)}"
 
 # Install the MicroBlaze System configuration into the board configuration,
 # and generate a u-boot specific config.mk
-do_configure_prepend () {
-        if [ "${SOC_FAMILY}" = "microblaze" -a -e "${UBOOT_XPARAMETERS}" ]; then
-                CONFIG_MK=${S}/board/xilinx/microblaze-generic/config.mk
-                cp ${UBOOT_XPARAMETERS} ${S}/board/xilinx/microblaze-generic/xparameters.h
-
-                # Generate the config.mk from CFLAGS and XPARAMETERS file
-                echo "# This file is generated by the meta-xilinx layer." > ${CONFIG_MK}
-                echo "" >> ${CONFIG_MK}
-
-                # Export CCARGS
-                for i in ${TUNE_CCARGS}; do
-                        echo "PLATFORM_CPPFLAGS += $i" >> ${CONFIG_MK}
-                done
-                echo "" >> ${CONFIG_MK}
-
-                # Calculate the TEXT_BASE address at RAM_END - 4MB
-                RAM_START=$(grep "XILINX_RAM_START" ${UBOOT_XPARAMETERS} | grep -o "0x.*$")
-                RAM_SIZE=$(grep "XILINX_RAM_SIZE" ${UBOOT_XPARAMETERS} | grep -o "0x.*$")
-                BASE_OFFSET=$(printf "0x%08x" "$[$RAM_START + $RAM_SIZE - 0x400000]")
-
-                echo "TEXT_BASE = $BASE_OFFSET" >> ${CONFIG_MK}
-                echo "CONFIG_SYS_TEXT_BASE = $BASE_OFFSET" >> ${CONFIG_MK}
-        fi
+python do_configmk_generate () {
+    import re, sys, os, shutil
+
+    machine_xparameters = d.getVar("UBOOT_XPARAMETERS", True)
+
+    if d.getVar("SOC_FAMILY") == "microblaze" and machine_xparameters and os.path.exists(machine_xparameters):
+        boardpath = os.path.join("board", "xilinx", "microblaze-generic")
+        configmk = os.path.join(d.getVar("S", True), boardpath, "config.mk")
+        xparameters = os.path.join(d.getVar("S", True), boardpath, "xparameters.h")
+
+        shutil.copyfile(machine_xparameters, xparameters)
+
+        # Search the xparameters.h file for the RAM base addr and size.
+        ram = None
+        with open(machine_xparameters, "r") as f:
+            filedata = f.read()
+            ramstart = re.search("XILINX_RAM_START.*?(0x.*)", filedata)
+            ramsize = re.search("XILINX_RAM_SIZE.*?(0x.*)", filedata)
+            if ramstart and ramsize:
+                ram = (int(ramstart.group(1), 16), int(ramsize.group(1), 16))
+
+        # build up the config.mk file from known info
+        with open(configmk, "wb") as f:
+            f.write("# This file is generated by the meta-xilinx layers.\n")
+            f.write("\n")
+
+            for i in d.getVar("TUNE_CCARGS", True).split():
+                f.write("PLATFORM_CCPFLAGS += %s\n" % i)
+            f.write("\n")
+
+            if ram != None:
+                base_offset = ram[0] + ram[1] - 0x400000
+                f.write("TEXT_BASE = 0x%x\n" % base_offset)
+                f.write("CONFIG_SYS_TEXT_BASE = 0x%x\n" % base_offset)
 }
+addtask configmk_generate before do_configure after do_unpack
+