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authorMichael Ellerman <michael@ellerman.id.au>2006-03-21 12:46:11 +0300
committerPaul Mackerras <paulus@samba.org>2006-03-22 07:04:30 +0300
commitf8642ebee8e46d054d83828a4048fba4ebcd8f68 (patch)
tree98dba337c34de68e2b319d03f8c41c7c47807ae8
parent6c600ad8da189aebe65b765fd0349ef6c9dd8c1f (diff)
downloadlinux-f8642ebee8e46d054d83828a4048fba4ebcd8f68.tar.xz
[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 <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--arch/powerpc/kernel/setup_64.c2
-rw-r--r--arch/powerpc/mm/init_64.c48
-rw-r--r--include/asm-powerpc/lmb.h2
-rw-r--r--include/asm-powerpc/mmu.h1
4 files changed, 0 insertions, 53 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index f96c49b03ba0..2f3fdad35594 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -497,8 +497,6 @@ void __init setup_system(void)
#endif
printk("-----------------------------------------------------\n");
- mm_init_ppc64();
-
DBG(" <- setup_system()\n");
}
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 81cfb0c2ec58..5d4733d61805 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;
diff --git a/include/asm-powerpc/lmb.h b/include/asm-powerpc/lmb.h
index 377ac1b23aa3..0c5880f70225 100644
--- a/include/asm-powerpc/lmb.h
+++ b/include/asm-powerpc/lmb.h
@@ -54,8 +54,6 @@ extern void __init lmb_enforce_memory_limit(unsigned long memory_limit);
extern void lmb_dump_all(void);
-extern unsigned long io_hole_start;
-
static inline unsigned long
lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
{
diff --git a/include/asm-powerpc/mmu.h b/include/asm-powerpc/mmu.h
index b0b9a3f8cdc2..31f721994bd8 100644
--- a/include/asm-powerpc/mmu.h
+++ b/include/asm-powerpc/mmu.h
@@ -236,7 +236,6 @@ extern void htab_initialize_secondary(void);
extern void hpte_init_native(void);
extern void hpte_init_lpar(void);
extern void hpte_init_iSeries(void);
-extern void mm_init_ppc64(void);
extern long pSeries_lpar_hpte_insert(unsigned long hpte_group,
unsigned long va, unsigned long prpn,