From a93272969c6b1d59883fcbb04845420bd72c9a20 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Tue, 16 Mar 2010 13:16:25 +0000
Subject: [PATCH] powerpc: Fix swiotlb to respect the boot option

powerpc initializes swiotlb before parsing the kernel boot options so
swiotlb options (e.g. specifying the swiotlb buffer size) are ignored.

Any time before freeing bootmem works for swiotlb so this patch moves
powerpc's swiotlb initialization after parsing the kernel boot
options, mem_init (as x86 does).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Tested-by: Becky Bruce <beckyb@kernel.crashing.org>
Tested-by: Albert Herranz <albert_herranz@yahoo.es>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/setup_32.c | 6 ------
 arch/powerpc/kernel/setup_64.c | 6 ------
 arch/powerpc/mm/mem.c          | 6 ++++++
 3 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index b152de3e64d..8f58986c2ad 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -39,7 +39,6 @@
 #include <asm/serial.h>
 #include <asm/udbg.h>
 #include <asm/mmu_context.h>
-#include <asm/swiotlb.h>
 
 #include "setup.h"
 
@@ -343,11 +342,6 @@ void __init setup_arch(char **cmdline_p)
 		ppc_md.setup_arch();
 	if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
 
-#ifdef CONFIG_SWIOTLB
-	if (ppc_swiotlb_enable)
-		swiotlb_init(1);
-#endif
-
 	paging_init();
 
 	/* Initialize the MMU context management stuff */
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 63547394048..914389158a9 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -61,7 +61,6 @@
 #include <asm/xmon.h>
 #include <asm/udbg.h>
 #include <asm/kexec.h>
-#include <asm/swiotlb.h>
 #include <asm/mmu_context.h>
 
 #include "setup.h"
@@ -541,11 +540,6 @@ void __init setup_arch(char **cmdline_p)
 	if (ppc_md.setup_arch)
 		ppc_md.setup_arch();
 
-#ifdef CONFIG_SWIOTLB
-	if (ppc_swiotlb_enable)
-		swiotlb_init(1);
-#endif
-
 	paging_init();
 
 	/* Initialize the MMU context management stuff */
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 311224cdb7a..448f972b22f 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -48,6 +48,7 @@
 #include <asm/sparsemem.h>
 #include <asm/vdso.h>
 #include <asm/fixmap.h>
+#include <asm/swiotlb.h>
 
 #include "mmu_decl.h"
 
@@ -320,6 +321,11 @@ void __init mem_init(void)
 	struct page *page;
 	unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
 
+#ifdef CONFIG_SWIOTLB
+	if (ppc_swiotlb_enable)
+		swiotlb_init(1);
+#endif
+
 	num_physpages = lmb.memory.size >> PAGE_SHIFT;
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
 
-- 
2.20.1