prepare for 32bit pci root bus
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
arch/x86/pci/amd_bus.c | 7 ++++---
arch/x86/pci/bus_numa.c | 4 ++++
arch/x86/pci/intel_bus.c | 5 ++++-
include/linux/range.h | 10 ++++++++++
4 files changed, 22 insertions(+), 4 deletions(-)
Index: linux-2.6/arch/x86/pci/amd_bus.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/amd_bus.c
+++ linux-2.6/arch/x86/pci/amd_bus.c
@@ -201,7 +201,7 @@ static int __init early_fill_mp_bus_info
memset(range, 0, sizeof(range));
/* 0xfd00000000-0xffffffffff for HT */
- range[0].end = (0xfdULL<<32) - 1;
+ range[0].end = cap_4g((0xfdULL<<32) - 1);
/* need to take out [0, TOM) for RAM*/
address = MSR_K8_TOP_MEM1;
@@ -286,7 +286,7 @@ static int __init early_fill_mp_bus_info
}
}
- update_res(info, start, end, IORESOURCE_MEM, 1);
+ update_res(info, cap_4g(start), cap_4g(end), IORESOURCE_MEM, 1);
subtract_range(range, RANGE_NUM, start, end);
printk(KERN_CONT "\n");
}
@@ -321,7 +321,8 @@ static int __init early_fill_mp_bus_info
if (!range[i].end)
continue;
- update_res(info, range[i].start, range[i].end,
+ update_res(info, cap_4g(range[i].start),
+ cap_4g(range[i].end),
IORESOURCE_MEM, 1);
}
}
Index: linux-2.6/arch/x86/pci/bus_numa.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/bus_numa.c
+++ linux-2.6/arch/x86/pci/bus_numa.c
@@ -55,6 +55,10 @@ void __init update_res(struct pci_root_i
if (start > end)
return;
+ if (sizeof(resource_size_t) < sizeof(u64) &&
+ start == 0xffffffff)
+ return;
+
if (!merge)
goto addit;
Index: linux-2.6/arch/x86/pci/intel_bus.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/intel_bus.c
+++ linux-2.6/arch/x86/pci/intel_bus.c
@@ -6,6 +6,8 @@
#include <linux/dmi.h>
#include <linux/pci.h>
#include <linux/init.h>
+#include <linux/range.h>
+
#include <asm/pci_x86.h>
#include "bus_numa.h"
@@ -81,7 +83,8 @@ static void __devinit pci_root_bus_res(s
mmioh_base |= ((u64)(dword & 0x7ffff)) << 32;
pci_read_config_dword(dev, IOH_LMMIOH_LIMITU, &dword);
mmioh_end |= ((u64)(dword & 0x7ffff)) << 32;
- update_res(info, mmioh_base, mmioh_end, IORESOURCE_MEM, 0);
+ update_res(info, cap_4g(mmioh_base), cap_4g(mmioh_end),
+ IORESOURCE_MEM, 0);
print_ioh_resources(info);
}
Index: linux-2.6/include/linux/range.h
===================================================================
--- linux-2.6.orig/include/linux/range.h
+++ linux-2.6/include/linux/range.h
@@ -19,4 +19,14 @@ int clean_sort_range(struct range *range
void sort_range(struct range *range, int nr_range);
+static inline u64 cap_4g(u64 val)
+{
+ if (sizeof(resource_size_t) >= sizeof(u64))
+ return val;
+
+ if (val < 1ULL)
+ return val;
+
+ return 0xffffffff;
+}
#endif
--
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