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Subject[PATCH] x86: split e820 reserved entries record to late v2
Date
so could let BAR res register at first, or even pnp?

v2: insert e820 reserve resources before pnp_system_init

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

---
arch/x86/kernel/e820.c | 20 ++++++++++++++++++--
arch/x86/pci/i386.c | 3 +++
include/asm-x86/e820.h | 1 +
3 files changed, 22 insertions(+), 2 deletions(-)

Index: linux-2.6/arch/x86/kernel/e820.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/e820.c
+++ linux-2.6/arch/x86/kernel/e820.c
@@ -1271,13 +1271,15 @@ static inline const char *e820_type_to_s
/*
* Mark e820 reserved areas as busy for the resource manager.
*/
+struct resource __initdata *e820_res;
void __init e820_reserve_resources(void)
{
int i;
- struct resource *res;
u64 end;
+ struct resource *res;

res = alloc_bootmem_low(sizeof(struct resource) * e820.nr_map);
+ e820_res = res;
for (i = 0; i < e820.nr_map; i++) {
end = e820.map[i].addr + e820.map[i].size - 1;
#ifndef CONFIG_RESOURCES_64BIT
@@ -1291,7 +1293,8 @@ void __init e820_reserve_resources(void)
res->end = end;

res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
- insert_resource(&iomem_resource, res);
+ if (e820.map[i].type != E820_RESERVED || res->start < (1ULL<<20))
+ insert_resource(&iomem_resource, res);
res++;
}

@@ -1303,6 +1306,19 @@ void __init e820_reserve_resources(void)
}
}

+void __init e820_reserve_resources_late(void)
+{
+ int i;
+ struct resource *res;
+
+ res = e820_res;
+ for (i = 0; i < e820.nr_map; i++) {
+ if (e820.map[i].type == E820_RESERVED && res->start >= (1ULL<<20))
+ insert_resource(&iomem_resource, res);
+ res++;
+ }
+}
+
char *__init default_machine_specific_memory_setup(void)
{
char *who = "BIOS-e820";
Index: linux-2.6/arch/x86/pci/i386.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/i386.c
+++ linux-2.6/arch/x86/pci/i386.c
@@ -36,6 +36,7 @@
#include <asm/pat.h>
#include <asm/hpet.h>
#include <asm/io_apic.h>
+#include <asm/e820.h>

#include "pci.h"

@@ -308,6 +309,8 @@ void __init pcibios_resource_survey(void
pcibios_allocate_bus_resources(&pci_root_buses);
pcibios_allocate_resources(0);
pcibios_allocate_resources(1);
+
+ e820_reserve_resources_late();
}

/**
Index: linux-2.6/include/asm-x86/e820.h
===================================================================
--- linux-2.6.orig/include/asm-x86/e820.h
+++ linux-2.6/include/asm-x86/e820.h
@@ -122,6 +122,7 @@ extern void e820_register_active_regions
extern u64 e820_hole_size(u64 start, u64 end);
extern void finish_e820_parsing(void);
extern void e820_reserve_resources(void);
+extern void e820_reserve_resources_late(void);
extern void setup_memory_map(void);
extern char *default_machine_specific_memory_setup(void);
extern char *machine_specific_memory_setup(void);

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