From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Denk Date: Sat, 05 Nov 2011 23:20:12 +0100 Subject: [U-Boot] [PATCH v2 3/3] image: Allow images to indicate they're loadable at any address In-Reply-To: <1320164902-24190-3-git-send-email-swarren@nvidia.com> References: <1320164902-24190-1-git-send-email-swarren@nvidia.com> <1320164902-24190-3-git-send-email-swarren@nvidia.com> Message-ID: <20111105222012.DB7541893014@gemini.denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Stephen Warren, In message <1320164902-24190-3-git-send-email-swarren@nvidia.com> you wrote: > The legacy uImage format includes an absolute load and entry- > point address. When presented with a uImage in memory that > isn't loaded at the address in the image's load address, > U-Boot will relocate the image to its address in the header. > > Some payloads can actually be loaded and used at any arbitrary > address. An example is an ARM Linux kernel zImage file. This > is useful when sharing a single zImage across multiple boards > with different memory layouts, or U-Boot builds with different > ${load_addr} since sharing a single absolute load address may > not be possible. > > With this config option enabled, an image header may contain a > load address of -1/0xffffffff. This indicates the image can > operate at any load address, and U-Boot will avoid automtically > copying it anywhere. In this case, the entry-point field is > specified relative to the start of the image payload. Please don't invent a new solution. This has been discussed before, and the agreement was to introduce a new image format where the load and entry point addresses are not absolute, but interpreted as offsets relative to the respectice start of system RAM address. Your own IH_TYPE_*_REL patches are queued and will be merged soon. I do not see the need for yet another implementation for the very same thing, so NAK. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de How can you tell when sour cream goes bad?