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* nios2: fix r15 issue for gcc4Thomas Chou2010-05-281-6/+7
| | | | | | | | | | The "-ffixed-r15" option doesn't work well for gcc4. Since we don't use gp for small data with option "-G0", we can use gp as global data pointer. This allows compiler to use r15. It is necessary for gcc4 to work properly. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* Blackfin: change global data register from P5 to P3Robin Getz2009-09-021-1/+1
| | | | | | | | | | | Since the Blackfin ABI favors higher scratch registers by default, use the last scratch register (P3) for global data rather than the first (P5). This allows the compiler's register allocator to use higher number scratch P registers, which in turn better matches the Blackfin instruction set, which reduces the size of U-Boot by more than 1024 bytes... Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Merge branch 'master' of git://www.denx.de/git/u-boot-blackfinWolfgang Denk2008-02-151-10/+12
|\ | | | | | | | | | | | | | | | | Conflicts: Makefile doc/README.standalone Signed-off-by: Wolfgang Denk <wd@denx.de>
| * add some more Blackfin docsMike Frysinger2008-02-041-10/+11
| | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | PPC: Use r2 instead of r29 as global data pointerWolfgang Denk2008-02-141-1/+1
|/ | | | | | | | | | | | R29 was an unlucky choice as with recent toolchains (gcc-4.2.x) gcc will refuse to use load/store multiple insns; instead, it issues a list of simple load/store instructions upon function entry and exit, resulting in bigger code size, which in turn makes the build for a few boards fail. Use r2 instead. Signed-off-by: Wolfgang Denk <wd@denx.de>
* * Allow crc32 to be used at address 0x000wdenk2003-07-261-143/+83
| | | | | | | | * Provide consistent interface to standalone applications to access the 'global_data' structure Provide a doc/README.standalone more useful to users/developers. * Make IceCube MGT5100 FEC driver work
* * Implement new mechanism to export U-Boot's functions to standalonewdenk2003-07-241-0/+156
applications: instead of using (PPC-specific) system calls we now use a jump table; please see doc/README.standalone for details * Patch by Dave Westwood, 24 Jul 2003: added support for Unity OS (a proprietary OS)
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