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.

2 files changed, 61 insertions, 6 deletions

diff --git a/sys/mips/conf/TP-WN1043ND b/sys/mips/conf/TP-WN1043ND
index cc68a31..cb0d6f5 100644
--- a/sys/mips/conf/TP-WN1043ND
+++ b/sys/mips/conf/TP-WN1043ND
@@ -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\"
diff --git a/sys/mips/conf/TP-WN1043ND.hints b/sys/mips/conf/TP-WN1043ND.hints
index e43d7b9..fbaead5c 100644
--- a/sys/mips/conf/TP-WN1043ND.hints
+++ b/sys/mips/conf/TP-WN1043ND.hints
@@ -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