From bd7c93cca36911baf2eb2bc386956612af3b842d Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Tue, 5 Jul 2016 15:03:45 +1000 Subject: [PATCH] powerpc: Update obsolete comments in setup_32.c about entry conditions early_init() is called in-place before kernel relocation and using whatever MMU setup exists at the point the kernel is entered. machine_init() is called after relocation and after some initial mapping of PAGE_OFFSET has been established (typically using BATs on 6xx/7xx/7xxx processors or some form of bolted TLB on others). Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/setup_32.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index d544fa311757..2fc27ace80f9 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -62,9 +62,7 @@ int icache_bsize; int ucache_bsize; /* - * We're called here very early in the boot. We determine the machine - * type and call the appropriate low-level setup functions. - * -- Cort + * We're called here very early in the boot. * * Note that the kernel may be running at an address which is different * from the address that it was linked at, so we must use RELOC/PTRRELOC @@ -105,6 +103,10 @@ notrace unsigned long __init early_init(unsigned long dt_ptr) /* + * This is run before start_kernel(), the kernel has been relocated + * and we are running with enough of the MMU enabled to have our + * proper kernel virtual addresses + * * Find out what kind of machine we're on and save any data we need * from the early boot process (devtree is copied on pmac by prom_init()). * This is called very early on the boot process, after a minimal