From f8642ebee8e46d054d83828a4048fba4ebcd8f68 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 21 Mar 2006 20:46:11 +1100 Subject: [PATCH] powerpc: Remove calculation of io hole In mm_init_ppc64() we calculate the location of the "IO hole", but then no one ever looks at the value. So don't bother. That's actually all mm_init_ppc64() does, so get rid of it too. Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras --- arch/powerpc/mm/init_64.c | 48 ----------------------------------------------- 1 file changed, 48 deletions(-) (limited to 'arch/powerpc/mm') diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index 81cfb0c2ec5..5d4733d6180 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -84,54 +84,6 @@ /* max amount of RAM to use */ unsigned long __max_memory; -/* info on what we think the IO hole is */ -unsigned long io_hole_start; -unsigned long io_hole_size; - -/* - * Do very early mm setup. - */ -void __init mm_init_ppc64(void) -{ -#ifndef CONFIG_PPC_ISERIES - unsigned long i; -#endif - - ppc64_boot_msg(0x100, "MM Init"); - - /* This is the story of the IO hole... please, keep seated, - * unfortunately, we are out of oxygen masks at the moment. - * So we need some rough way to tell where your big IO hole - * is. On pmac, it's between 2G and 4G, on POWER3, it's around - * that area as well, on POWER4 we don't have one, etc... - * We need that as a "hint" when sizing the TCE table on POWER3 - * So far, the simplest way that seem work well enough for us it - * to just assume that the first discontinuity in our physical - * RAM layout is the IO hole. That may not be correct in the future - * (and isn't on iSeries but then we don't care ;) - */ - -#ifndef CONFIG_PPC_ISERIES - for (i = 1; i < lmb.memory.cnt; i++) { - unsigned long base, prevbase, prevsize; - - prevbase = lmb.memory.region[i-1].base; - prevsize = lmb.memory.region[i-1].size; - base = lmb.memory.region[i].base; - if (base > (prevbase + prevsize)) { - io_hole_start = prevbase + prevsize; - io_hole_size = base - (prevbase + prevsize); - break; - } - } -#endif /* CONFIG_PPC_ISERIES */ - if (io_hole_start) - printk("IO Hole assumed to be %lx -> %lx\n", - io_hole_start, io_hole_start + io_hole_size - 1); - - ppc64_boot_msg(0x100, "MM Init Done"); -} - void free_initmem(void) { unsigned long addr; -- cgit v1.2.3