svn commit: r227921 - head/sys/mips/conf
Adrian Chadd
adrian at FreeBSD.org
Thu Nov 24 04:39:01 UTC 2011
Author: adrian
Date: Thu Nov 24 04:39:01 2011
New Revision: 227921
URL: http://svn.freebsd.org/changeset/base/227921
Log:
Flesh out a geom_map setup, so the kernel can be squeezed _onto_ the device.
The default flash layout gives only 1 megabyte for the kernel, gzipped.
The uboot firmware running on this device only supports gzip, not lzma, so
we actually _do_ have to try and slim the kernel down a bit.
But, since I can't actually do that at the present, I'm opting to:
* extend the kernel from 1mb to 2mb;
* have rootfs fill the rest of that, save 64k;
* eventually I'll hide a 64k config partition at the end, between the
end of rootfs and the ART (radio configuration data.)
The uboot firmware doesn't care about the partition layout. It just
expects the kernel application image to sit at 0xbf020000 (right after
the 128k uboot image.) The uboot header isn't actually read either -
it's "faked" from a "tplink" flash image header. So as long as the
map configuration here matches what is being written out via the
tplink firmware generator, everything is a-ok.
Modified:
head/sys/mips/conf/TP-WN1043ND
head/sys/mips/conf/TP-WN1043ND.hints
Modified: head/sys/mips/conf/TP-WN1043ND
==============================================================================
--- head/sys/mips/conf/TP-WN1043ND Thu Nov 24 04:34:04 2011 (r227920)
+++ head/sys/mips/conf/TP-WN1043ND Thu Nov 24 04:39:01 2011 (r227921)
@@ -20,11 +20,12 @@ options MSDOSFS
options GEOM_PART_BSD
options GEOM_PART_MBR
-# Just make sure the thing boots off of the first attached SCSI device for now!
-#options ROOTDEVNAME=\"ufs:da0a\"
-# Or an MDROOT for testing.
-options MD_ROOT
-options MD_ROOT_SIZE=5120
+# uzip - to boot natively from flash
device geom_uzip
options GEOM_UZIP
-options ROOTDEVNAME=\"ufs:/dev/md0.uzip\"
+
+# Used for the static uboot partition map
+device geom_map
+
+# Boot off of the rootfs, as defined in the geom_map setup.
+options ROOTDEVNAME=\"ufs:map/rootfs.uzip\"
Modified: head/sys/mips/conf/TP-WN1043ND.hints
==============================================================================
--- head/sys/mips/conf/TP-WN1043ND.hints Thu Nov 24 04:34:04 2011 (r227920)
+++ head/sys/mips/conf/TP-WN1043ND.hints Thu Nov 24 04:39:01 2011 (r227921)
@@ -17,3 +17,57 @@ hint.arge.1.phymask=0x0
# Where the ART is
hint.ath.0.eepromaddr=0x1fff1000
+
+#
+# Define a slightly custom flash layout.
+
+# The default flash layout:
+#
+# 128k: uboot
+# 1024k: kernel
+# 4096k: rootfs
+# 2880k: unknown
+# 64k: ART
+#
+# from printenv:
+# bootargs=console=ttyS0,115200 root=31:02 rootfstype=jffs2 init=/sbin/init
+# mtdparts=ar9100-nor0:128k(u-boot),1024k(kernel),4096k(rootfs),64k(art)
+
+# This isn't a lot of space!
+# So:
+# 128k: uboot
+# 2048k: kernel
+# 5888k: rootfs
+# (todo: 64k: config)
+# 64k: ART
+
+hint.map.0.at="flash/spi0"
+hint.map.0.start=0x00000000
+hint.map.0.end=0x000200000
+hint.map.0.name="uboot"
+hint.map.0.readonly=1
+
+hint.map.1.at="flash/spi0"
+hint.map.1.start=0x00020000
+hint.map.1.end=0x00220000
+hint.map.1.name="kernel"
+hint.map.1.readonly=1
+
+hint.map.2.at="flash/spi0"
+hint.map.2.start=0x00220000
+#hint.map.2.end=0x007e0000
+hint.map.2.end=0x007f0000
+hint.map.2.name="rootfs"
+hint.map.2.readonly=1
+
+#hint.map.3.at="flash/spi0"
+#hint.map.3.start=0x007e0000
+#hint.map.3.end=0x007f0000
+#hint.map.3.name="cfg"
+#hint.map.3.readonly=1
+
+hint.map.4.at="flash/spi0"
+hint.map.4.start=0x007f0000
+hint.map.4.end=0x00800000
+hint.map.4.name="art"
+hint.map.4.readonly=1
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