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Date: Wed, 25 Jun 2008 21:51:28 -0700
From: Yinghai Lu <yhlu.kernel@...il.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: move fix mapping page table range early
do that in init_memory_mapping
also remove one init_ohci1394_dma_on_all_controllers
Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
---
arch/x86/kernel/setup.c | 23 +++++++++--------------
arch/x86/mm/init_32.c | 15 +++++++++++----
2 files changed, 20 insertions(+), 18 deletions(-)
Index: linux-2.6/arch/x86/kernel/setup.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup.c
+++ linux-2.6/arch/x86/kernel/setup.c
@@ -615,11 +615,6 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_X86_32
probe_roms();
-#else
-# ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
- if (init_ohci1394_dma_early)
- init_ohci1394_dma_on_all_controllers();
-# endif
#endif
/* after parse_early_param, so could debug it */
@@ -679,6 +674,15 @@ void __init setup_arch(char **cmdline_p)
#endif
init_memory_mapping(0, (max_low_pfn << PAGE_SHIFT));
+ /*
+ * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
+ */
+
+#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
+ if (init_ohci1394_dma_early)
+ init_ohci1394_dma_on_all_controllers();
+#endif
+
reserve_initrd();
#ifdef CONFIG_X86_64
@@ -746,15 +750,6 @@ void __init setup_arch(char **cmdline_p)
map_vsyscall();
#endif
- /*
- * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
- */
-
-#if defined(CONFIG_PROVIDE_OHCI1394_DMA_INIT) && defined(CONFIG_X86_32)
- if (init_ohci1394_dma_early)
- init_ohci1394_dma_on_all_controllers();
-#endif
-
#ifdef CONFIG_X86_GENERICARCH
generic_apic_probe();
#endif
Index: linux-2.6/arch/x86/mm/init_32.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/init_32.c
+++ linux-2.6/arch/x86/mm/init_32.c
@@ -442,13 +442,10 @@ void __init native_pagetable_setup_done(
* be partially populated, and so it avoids stomping on any existing
* mappings.
*/
-static void __init pagetable_init(void)
+static void __init early_ioremap_page_table_range_init(pgd_t *pgd_base)
{
- pgd_t *pgd_base = swapper_pg_dir;
unsigned long vaddr, end;
- paravirt_pagetable_setup_start(pgd_base);
-
/*
* Fixed mappings, only the page table structure has to be
* created - mappings will be set by set_fixmap():
@@ -458,6 +455,13 @@ static void __init pagetable_init(void)
end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
page_table_range_init(vaddr, end, pgd_base);
early_ioremap_reset();
+}
+
+static void __init pagetable_init(void)
+{
+ pgd_t *pgd_base = swapper_pg_dir;
+
+ paravirt_pagetable_setup_start(pgd_base);
permanent_kmaps_init(pgd_base);
@@ -783,6 +787,8 @@ unsigned long __init_refok init_memory_m
kernel_physical_mapping_init(pgd_base, start, end);
+ early_ioremap_page_table_range_init(pgd_base);
+
load_cr3(swapper_pg_dir);
__flush_tlb_all();
@@ -794,6 +800,7 @@ unsigned long __init_refok init_memory_m
return end >> PAGE_SHIFT;
}
+
/*
* paging_init() sets up the page tables - note that the first 8MB are
* already mapped by head.S.
--
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