pramfs-init: add recipe

pramfs-init is a RRECCOMMEND to pramfs, that helps mount FS to PRAM.

Signed-off-by: Nora Björklund <nora.bjorklund@enea.com>
Signed-off-by: Martin Borg <martin.borg@enea.com>

2 files changed, 94 insertions, 0 deletions

diff --git a/recipes-kernel/pramfs-init/files/pramfs_init b/recipes-kernel/pramfs-init/files/pramfs_init
new file mode 100644
index 0000000..a3314f5
--- /dev/null
+++ b/recipes-kernel/pramfs-init/files/pramfs_init
@@ -0,0 +1,74 @@
+#!/bin/sh
+#set -e
+
+echo "Setting up pramfs"
+
+# ensure the required binaries are present
+#[ -x /sbin/modprobe ] || exit 1
+[ -x /bin/mount ] || exit 1
+[ -x /bin/grep ] || exit 1
+[ -x /bin/cat ] || exit 1
+[ -x /bin/sed ] || exit 1
+
+#modprobe pramfs
+mkdir -p /mnt/pram
+
+case "$1" in
+    start)
+        # Figure out RAM for pramfs
+        # This requires a kernel cmdline resevation of PRAMFS physmem
+        # in format memmap=16M$0x7000000
+        grep memmap /proc/cmdline > /dev/null
+        if [ $? -eq 0 ]; then
+            addr=$(sed 's/.*memmap=\([^ ]*\)\$\([^ ]*\).*/\2/' < /proc/cmdline)
+            size=$(sed 's/.*memmap=\([^ ]*\)\$\([^ ]*\).*/\1/' < /proc/cmdline)
+
+            if [ -d /seed ]; then
+                echo "Init new pramfs"
+                mount -t pramfs -o physaddr=$addr,init=$size,bs=1k none /mnt/pram > /dev/null 2>&1
+                cp /seed/* /mnt/pram
+                echo "0" > /mnt/pram/kcount
+            else
+                echo "Mounting old pramfs"
+                mount -t pramfs -o physaddr=$addr,bs=1k none /mnt/pram > /dev/null 2>&1
+                if [ $? -ne 0 ]; then
+                    echo "Mounting old pramfs failed, zeroing"
+                    mount -t pramfs -o physaddr=$addr,init=$size,bs=1k none /mnt/pram > /dev/null 2>&1
+                    if [ $? -ne 0 ]; then
+                        echo "All attempts to mount pramfs has failed, exiting"
+                        rm -fr /mnt/pram
+                        exit 1
+                    fi
+                    echo "0" > /mnt/pram/kcount
+                fi
+            fi
+
+            #          echo "* Setting up kexec"
+            #          kexec -l --reuse-cmdline --initrd=/mnt/pram/initramfs.cpio.gz /mnt/pram/vmlinuz
+
+            # Calculate number of boots
+            export KCOUNT=$(expr $(cat /mnt/pram/kcount) + 1)
+            echo $KCOUNT > /mnt/pram/kcount
+        else
+            KCOUNT="no-mem"
+            echo "Can't find memory area for pram fs"
+            rm -fr /mnt/pram
+        fi
+
+        echo "PRAMFS boot count: $KCOUNT"
+        #      echo "kexec -e to kexec and keep persistent files in /mnt/pram"
+        ;;
+    stop)
+        echo
+        ;;
+    restart)
+        $0 stop
+        $0 start
+        ;;
+    *)
+        echo "usage: $0 { start | stop | restart }" >&2
+        exit 1
+        ;;
+esac
+
+exit 0
diff --git a/recipes-kernel/pramfs-init/pramfs-init_1.0.bb b/recipes-kernel/pramfs-init/pramfs-init_1.0.bb
new file mode 100644
index 0000000..d9b36a7
--- /dev/null
+++ b/recipes-kernel/pramfs-init/pramfs-init_1.0.bb
@@ -0,0 +1,20 @@
+DESCRIPTION = "Pramfs init scripts"
+SECTION = "init"
+LICENSE = "BSD"
+SRC_URI = "file://pramfs_init"
+PR = "r0"
+
+LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=4d92cd373abda3937c2bc47fbc49d690 \
+                    file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+
+PACKAGE_ARCH = "all"
+
+do_install() {
+        install -d ${D}${sysconfdir}/init.d/
+        install -m 0755 ${WORKDIR}/pramfs_init ${D}${sysconfdir}/init.d/pramfs_init
+}
+
+inherit update-rc.d
+
+INITSCRIPT_NAME = "pramfs_init"
+INITSCRIPT_PARAMS = "start 99 5 2 . stop 19 0 1 6 ."