i was about to dig into this until i noticed that, since i'm working on PPC, i shouldn't(?) care about it.
as i read it, if one sets that function pointer, as in (from post/tests.c):
#if CONFIG_POST & CONFIG_SYS_POST_SYSMON { "SYSMON test", "sysmon", "This test monitors system hardware.", POST_RAM | POST_ALWAYS, &sysmon_post_test, &sysmon_init_f, &sysmon_reloc, <----- there CONFIG_SYS_POST_SYSMON }, #endif
the only place i see that function being invoked is in post/post.c, and requires the config setting CONFIG_NEEDS_MANUAL_RELOC:
#ifdef CONFIG_NEEDS_MANUAL_RELOC void post_reloc(void) { unsigned int i;
/* * We have to relocate the test table manually */ for (i = 0; i < post_list_size; i++) {
... snip ...
if (test->reloc) { addr = (ulong)(test->reloc) + gd->reloc_off; test->reloc = (void (*)(void)) addr;
test->reloc(); <----- invoke there } } } #endif
but the only architectures that define that config option don't appear to include PPC:
$ grep -r "define CONFIG_NEEDS_MANUAL_RELOC" * arch/sparc/include/asm/config.h:#define CONFIG_NEEDS_MANUAL_RELOC arch/nds32/include/asm/config.h:#define CONFIG_NEEDS_MANUAL_RELOC arch/microblaze/include/asm/config.h:#define CONFIG_NEEDS_MANUAL_RELOC arch/avr32/include/asm/config.h:#define CONFIG_NEEDS_MANUAL_RELOC arch/m68k/include/asm/config.h:#define CONFIG_NEEDS_MANUAL_RELOC include/configs/adp-ag101p.h:#define CONFIG_NEEDS_MANUAL_RELOC $
so unless there is some weird corner case where one would register a function pointer there for some specific PPC board, am i safe to ignore that for PPC? (i do notice that, for the sample board lwmon5, one is forced to register a no-op routine there simply because you *must* assign a function there if you select that test.)
probably a couple more POST-related questions coming, at which point i'll put together a patch to update doc/README.POST unless someone else is already on that.
rday