From ed34bfa8f1c97271c4546cd8312112da97d1df08 Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Thu, 10 Feb 2011 23:36:39 +0000
Subject: [PATCH] Add 'generic' flash images.  This is for projects producing
 generic images that are of a certain size.  The geometery is bogus, but that
 doesn't matter since the new packet mode onviates the need to get the
 geometry right.

---
 tools/tools/nanobsd/FlashDevice.sub | 44 ++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/tools/tools/nanobsd/FlashDevice.sub b/tools/tools/nanobsd/FlashDevice.sub
index ce9095097e8..90b3f6db364 100644
--- a/tools/tools/nanobsd/FlashDevice.sub
+++ b/tools/tools/nanobsd/FlashDevice.sub
@@ -203,10 +203,52 @@ sub_FlashDevice () {
 			;;
 		esac
 		;;
+	# Generic flash media.  It assumes that we're booting using packet
+	# mode so the HEADS and SECTS don't matter.  The truncation of the
+	# size to a slightly lower number is intentional to be conservative
+	# (eg, 1 sector smaller than N GB is always smaller than any flash
+	# claiming to be N GB, but wastes a little space sometimes when 1GB
+	# really means 1GiB).  This is intended to be used when producing
+	# generic images for anybody to boot.  Media sizes are specified 'Xg'
+	# for X GB (10^9 bytes) flash or Xm for X MB (10^6 bytes) flash.
+	# Power of 2 variants can be specified with gi or mi for GiB and MiB
+	# sizeed flash and don't try to be conservative (use with caution).
+	generic)
+		case $a2 in
+		*.*)	# Catch unsupported 1.5g case, since expr can't
+			# cope with floats.
+			echo "Unsupported generic size $a2"
+			exit 2
+			;;
+		*m)
+			NANO_HEADS=16
+			NANO_SECTS=63
+			NANO_MEDIASIZE=`expr -e ${a2%m} \* 1000000 / 512`
+			;;
+		*g)
+			NANO_HEADS=16
+			NANO_SECTS=63
+			NANO_MEDIASIZE=`expr -e ${a2%g} \* 1000000000 / 512`
+			;;
+		*mi)
+			NANO_HEADS=16
+			NANO_SECTS=63
+			NANO_MEDIASIZE=`expr -e ${a2%mi} \* 1024 \* 1024 / 512`
+			;;
+		*gi)
+			NANO_HEADS=16
+			NANO_SECTS=63
+			NANO_MEDIASIZE=`expr -e ${a2%gi} \* 1024 \* 1024 \* 1024 / 512`
+			;;
+		*)
+			echo "Unsupported generic size $a2"
+			exit 2
+			;;
+		esac
+		;;
 	*)
 		echo "Unknown Flash manufacturer"
 		exit 2
 		;;
 	esac
 }
-