-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 04/19/2013 11:41 AM, Philip Paeps wrote: > On 2013-04-19 17:21:49 (+0200), Benoît Thébaudeau > <benoit.thebaud...@advansee.com> wrote: >> On Friday, April 19, 2013 5:09:59 PM,Philip Paeps wrote: >>> On 2013-04-19 16:48:42 (+0200), Philip Paeps <phi...@paeps.cx> >>> wrote: >>>> A first build with CONFIG_SPL_FRAMEWORK came out to nearly >>>> 4K. Large contributors being (unsurprisingly) libcommon and >>>> libgeneric. I had to get rid of a puts() in libspl to make >>>> it build without those libraries. Unfortunately, that still >>>> came out to 2.2K. Close. :-) >>>> >>>> I couldn't identify any obvious 100 bytes to scrap from >>>> glancing at u-boot-spl.map or objdump -D u-boot-spl, but I'll >>>> take a look. >>> >>> Just as I hit 'send', it occurred to me that this configuration >>> is with a fairly lengthy lowlevel_init.S to support external >>> boot. Paring that to the bare minimum gives a u-boot-spl.bin >>> of 1821 bytes. >> >> But this requires a board-specific lowlevel_init() and a hack for >> puts() (which is perhaps already solved by Andreas' series), just >> to bloat the SPL with stuff useless for those boards, vs. a >> simple nand_boot() that can be made common to all SPLs with size >> restrictions. > > Comparing the contents of "framework" SPL with "old" SPL, it looks > like the only thing we gain is support for booting uImage files. > At the cost of significantly reduced room for flexibility in > lowlevel_init(). > > I agree that a simple nand_boot() is probably the way forward.
Note that PowerPC has had to deal with this as well, see drivers/mtd/nand/fsl_elbc_spl.c and I suspect some amount of that should be made more easily borrowable for the case where SPL doesn't (or can't/won't) deal with image headers. - -- Tom -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJRcW7JAAoJENk4IS6UOR1Wmx4P/iIJS8QXZfdO7FNpeZz7Zet6 UNwsFoZeZ1jq+7DhFoA+o5Vwafys+AcYXX2uP0pVC9TJAbGBGSprYao6NE8tA0oo OWFWktUHoNn5vPedcrZuN6fxcBT9p+7MCo76YojSnWWd2DuwODODY6G3MX7I9iMi qbsBxJ9R13ubvd3rXGLltDFmR3hZx6wNRv/ke7Mk1dTycEKFbQIFmYhyXLHJLB6+ wxon4knbYcz1GmISUioGDX+hmc4NmKapydSeolmN1wE2tY9+0Mw+OINXcrYTjAN+ 8HpeuDsY2d/MzFdfgf9XvrZh2BFWmT7infK09udd6mbxosQYmEc8jIDnk+3DtA1I blcLjHOkxdVBS1665D0rWVGHs41CQcJfaaSdb3+pZSAbRwNzh2vivuLwdI//LyHf oMivbM8fLWkSpMSAxu517rfutF+KiJRr0Bns/QqQn4JmIs3qLfjPvpdPST/BaaI9 CAzlpz9c+iZaFvmfutvXhkPOZOKsjAfvT/04SAdXiruf83tn5ceU3/Z/adVxycth i8UdVqjAG4wtZtGaGjwd7SsW5cFlNy0ODZHMY+QqxD+XSD6T+3L815QpPZDhM2T2 obhgujYC6gg6vAlFp5nWnRxjeL0vB5k/HqV+4k9V9dAcpOyhWRvLeKgaiGyQMSpL xTyf7qQrf4ZkGFjO1zU/ =lMuD -----END PGP SIGNATURE----- _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot