Hi, Sorry, reply is late..
I will check your patches this weekend. Best regards, Nobuhiro 2016-08-31 18:44 GMT+09:00 Vladimir Zapolskiy <v...@mleia.com>: > On 06.08.2016 21:21, Vladimir Zapolskiy wrote: >> The changeset implements initial support of relocatable U-Boot code >> for SH2/SH3/SH4 architectures and boards, as weel as it restores >> a possibility to boot U-Boot on SH boards, which has not been converted >> to generic board in time (for more details see commit f41e6088eb1 >> ("sh: Fix build errors for generic board")). Special attention from >> maintainers of all touched boards is required, due to inaccessibility >> of hardware for me it would be a troublesome task. >> >> Now code/data initialization and relocation in general resemble the >> procedure on ARM with minor peculiarities (same one relocation from a >> storage device if calculated reloc_off == 0, otherwise two relocations), >> however please note that the change does *not* add PIE support (only PIC), >> so it may end up that there are persistent pointers to some non-relocated >> data, this point requires better investion. >> >> There is a runtime dependency on one generic change in common/board_f.c, >> see patch https://patchwork.ozlabs.org/patch/656371/ , also only r2dplus >> board is actually converted to support new arcitectural changes, >> application of patch 12/12 depends on SH7751 PCI fixes found at >> https://patchwork.ozlabs.org/patch/656373/ : >> >> -#define CONFIG_SYS_TEXT_BASE 0x8FFC0000 >> +#define CONFIG_SYS_TEXT_BASE 0x8FE00000 >> >> This r2dplus board change allows immediately check the correctness of >> the series on a r2dplus qemu target, note that the second copy is >> not avoided in this case, also for simplicity SDRAM area up to text base >> is large enough to store malloc pool and two copies of loaded code/data. >> >> Board maintainers may pay attention to CONFIG_SYS_MALLOC_CLEAR_ON_INIT, >> CONFIG_NEEDS_MANUAL_RELOC, CONFIG_SYS_GENERIC_GLOBAL_DATA etc. options. >> To let know about the change and to continue with the completion of >> the final step of board conversions to generic board I include all >> SH2/SH3/SH4 board maintainers into Cc list, please update your board >> configs appropriately. >> >> The change was tested on one custom SH4 (SH7551R) board, r2dplus qemu >> target (see also SH7751 PCI change under review), the rest of the boards >> are compile tested only. >> >> Multiple kudos to Simon for great patience and a decision to not remove >> the code. >> >> Any further improvements are welcome, especially it's worth to mention >> the anticipated convertion to PIE. >> >> Vladimir Zapolskiy (12): >> sh4: use single u-boot linker script for all boards >> sh: place board lowlevel_init code in the beginning of .text >> sh: define entry point and reloc_dst inside a linker script >> sh: add MEMORY command to a shared linker script >> sh: remove undefined DEBUG preprocessor token from board config files >> sh: define CONFIG_DISPLAY_BOARDINFO to print board information >> sh: add common dram_init() function for all boards >> sh: add shared relocate_code() function and call board_init_r() >> sh4: fix start.S by calling board_init_f() after first code relocation >> sh: share the correct version of start.S among all cpus >> sh: generate position independent code for all platforms >> r2dplus: fixup CONFIG_SYS_TEXT_BASE to account arch/sh changes >> > > Ping. > > -- > Best wishes, > Vladimir -- Nobuhiro Iwamatsu iwamatsu at {nigauri.org / debian.org} GPG ID: 40AD1FA6 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot