The switch from archive libraries to partial linking has introduced a number of problems, that are non-trivial to solve. For example, it is no longer possible to include individual object files in the linker script as we did before for example in the case of boards with embedded environment to fill up the gap caused by the need to align the environment on flash erase block boundaries.
The best (but unfortunately not easiest) approach to address this problem is probably to enable -ffunction-sections (and -ffunction-sections) so we can again (and even in much finer granularity) place certain code where we want it. When doing this step, it seems only consequent to also add --gc-sections which has the added benefit of reducing the memory footprint of the U-Boot image (both in flash and in RAM). Unfortunately, this requires changes to a lot of linker scripts. The following patch series prepares the groung a bit, then enables --gc-sections, -ffunction-sections and -ffunction-sections for the Power Archtiecture, and then starts to make all PowerPC boards build again, beginning with 4xx. As it turns out, this process uncovers a number of (so far undetected) bugs that have creapt in, which I try to fix as well. To Stefan Roese: Stefan, I need your help fixing the kilauea_nand and haleakala_nand board configurations; currently these fail with a "undefined reference to `initdram'" error. It appears that in the past these included the code from cpu/ppc4xx/denali_spd_ddr2.c, but I doubt that was correct? Comments and.or help converting the remaining processors welcome. Note: these patches are also available in the "gc-sections" branch of the u-boot-testing repository. Overview: ========= [PATCH 1/7] common/Makefile: don't include env_embedded.o into libcommon common/Makefile | 14 +++++++------- 1 files changed, 7 insertions(+), 7 deletions(-) [PATCH 2/7] cpu/ppc4xx/Makefile: build only needed object files arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c | 4 --- arch/powerpc/cpu/ppc4xx/4xx_ibm_ddr2_autocalib.c | 3 -- arch/powerpc/cpu/ppc4xx/Makefile | 25 ++++++++------------- 3 files changed, 10 insertions(+), 22 deletions(-) [PATCH 3/7] arch/powerpc/config.mk: make CONFIG_SYS_LDSCRIPT settings work arch/powerpc/config.mk | 7 +++++++ arch/powerpc/cpu/ppc4xx/config.mk | 6 +++++- 2 files changed, 12 insertions(+), 1 deletions(-) [PATCH 4/7] PPChameleonEVB and CATcenter need a custom linker script board/dave/PPChameleonEVB/u-boot.lds | 128 ++++++++++++++++++++++++++++++++++ include/configs/CATcenter.h | 1 + include/configs/PPChameleonEVB.h | 1 + 3 files changed, 130 insertions(+), 0 deletions(-) create mode 100644 board/dave/PPChameleonEVB/u-boot.lds [PATCH 5/7] ERIC: drop unsupported board configuration CREDITS | 4 - MAINTAINERS | 2 - board/eric/Makefile | 51 --- board/eric/eric.c | 203 --------- board/eric/eric.h | 44 -- board/eric/flash.c | 1131 ------------------------------------------------ board/eric/init.S | 359 --------------- boards.cfg | 1 - doc/README.scrapyard | 3 +- include/configs/ERIC.h | 369 ---------------- 10 files changed, 2 insertions(+), 2165 deletions(-) delete mode 100644 board/eric/Makefile delete mode 100644 board/eric/eric.c delete mode 100644 board/eric/eric.h delete mode 100644 board/eric/flash.c delete mode 100644 board/eric/init.S delete mode 100644 include/configs/ERIC.h [PATCH 6/7] POWERPC: enable --gc-sections and -ffunction-sections -fdata-sections arch/powerpc/config.mk | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) [PATCH 7/7] 4xx: Cleanup for partial linking and --gc-sections arch/powerpc/cpu/ppc4xx/Makefile | 2 +- arch/powerpc/cpu/ppc4xx/u-boot.lds | 53 +++++-------------------- board/amcc/bamboo/Makefile | 6 ++- board/amcc/bamboo/u-boot-nand.lds | 50 +++++------------------ board/amcc/bluestone/Makefile | 6 ++- board/amcc/canyonlands/Makefile | 6 ++- board/amcc/canyonlands/u-boot-nand.lds | 48 ++++------------------ board/amcc/sequoia/Makefile | 6 ++- board/amcc/sequoia/u-boot-nand.lds | 48 ++++------------------ board/amcc/sequoia/u-boot-ram.lds | 50 +++++------------------ board/amirix/ap1000/Makefile | 4 +- board/amirix/ap1000/u-boot.lds | 67 +++++-------------------------- board/cray/L1/L1.c | 6 --- board/esd/dasa_sim/u-boot.lds | 57 ++++++--------------------- board/esd/du440/Makefile | 6 ++- board/esd/pmc440/Makefile | 6 ++- board/gdsys/intip/Makefile | 6 ++- board/korat/Makefile | 6 ++- board/lwmon5/Makefile | 6 ++- board/ml2/u-boot.lds | 69 ++++--------------------------- board/netstal/hcu5/Makefile | 4 +- board/sbc405/sbc405.c | 7 --- board/t3corp/Makefile | 6 ++- include/configs/AP1000.h | 8 ++++ include/configs/CANBT.h | 2 +- include/configs/CPCI2DP.h | 2 +- include/configs/DP405.h | 1 + include/configs/ML2.h | 9 ++++ include/configs/sc3.h | 2 +- 29 files changed, 147 insertions(+), 402 deletions(-) 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: w...@denx.de I used to be indecisive, now I'm not sure. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
