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Subject[PATCH -v3 1/3] x86: Reserve [0xa0000, 0x100000] in e820 map


Update e820 at first, and later put them resource tree.

Reserved that early, will not be allocated to unassigned PCI BAR

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Andy Isaacson <adi@hexapodia.org>
Tested-by: Andy Isaacson <adi@hexapodia.org>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>

---
arch/x86/include/asm/setup.h | 1 -
arch/x86/kernel/head32.c | 1 -
arch/x86/kernel/setup.c | 19 +------------------
3 files changed, 1 insertion(+), 20 deletions(-)

Index: linux-2.6/arch/x86/include/asm/setup.h
===================================================================
--- linux-2.6.orig/arch/x86/include/asm/setup.h
+++ linux-2.6/arch/x86/include/asm/setup.h
@@ -44,7 +44,6 @@ static inline void visws_early_detect(vo
extern unsigned long saved_video_mode;

extern void reserve_standard_io_resources(void);
-extern void i386_reserve_resources(void);
extern void setup_default_timer_irq(void);

#ifdef CONFIG_X86_MRST
Index: linux-2.6/arch/x86/kernel/head32.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/head32.c
+++ linux-2.6/arch/x86/kernel/head32.c
@@ -22,7 +22,6 @@ static void __init i386_default_early_se
{
/* Initilize 32bit specific setup functions */
x86_init.resources.probe_roms = probe_roms;
- x86_init.resources.reserve_resources = i386_reserve_resources;
x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc;

reserve_ebda_region();
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
@@ -693,7 +693,7 @@ static void __init trim_bios_range(void)
* area (640->1Mb) as ram even though it is not.
* take them out.
*/
- e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
+ e820_add_region(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RESERVED);
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
}

@@ -1052,20 +1052,3 @@ void __init setup_arch(char **cmdline_p)

mcheck_init();
}
-
-#ifdef CONFIG_X86_32
-
-static struct resource video_ram_resource = {
- .name = "Video RAM area",
- .start = 0xa0000,
- .end = 0xbffff,
- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
-};
-
-void __init i386_reserve_resources(void)
-{
- request_resource(&iomem_resource, &video_ram_resource);
- reserve_standard_io_resources();
-}
-
-#endif /* CONFIG_X86_32 */

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