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Subject[PATCH 06/38] x86/pci: add cap_resource
prepare for 32bit pci root bus

-v2: hpa said we should compare with (resource_size_t)~0
-v3: according to Linus to use MAX_RESOURCE instead.
also need need to put related patches together

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
arch/x86/pci/amd_bus.c | 8 +++++---
arch/x86/pci/bus_numa.c | 3 +++
arch/x86/pci/intel_bus.c | 5 ++++-
include/linux/range.h | 8 ++++++++
4 files changed, 20 insertions(+), 4 deletions(-)
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index e8bb553..9bcb6fe 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -201,7 +201,7 @@ static int __init early_fill_mp_bus_info(void)

memset(range, 0, sizeof(range));
/* 0xfd00000000-0xffffffffff for HT */
- range[0].end = (0xfdULL<<32) - 1;
+ range[0].end = cap_resource((0xfdULL<<32) - 1);

/* need to take out [0, TOM) for RAM*/
address = MSR_K8_TOP_MEM1;
@@ -286,7 +286,8 @@ static int __init early_fill_mp_bus_info(void)
}
}

- update_res(info, start, end, IORESOURCE_MEM, 1);
+ update_res(info, cap_resource(start), cap_resource(end),
+ IORESOURCE_MEM, 1);
subtract_range(range, RANGE_NUM, start, end);
printk(KERN_CONT "\n");
}
@@ -321,7 +322,8 @@ static int __init early_fill_mp_bus_info(void)
if (!range[i].end)
continue;

- update_res(info, range[i].start, range[i].end,
+ update_res(info, cap_resource(range[i].start),
+ cap_resource(range[i].end),
IORESOURCE_MEM, 1);
}
}
diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
index 3411687..1515a9b 100644
--- a/arch/x86/pci/bus_numa.c
+++ b/arch/x86/pci/bus_numa.c
@@ -55,6 +55,9 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start,
if (start > end)
return;

+ if (start == MAX_RESOURCE)
+ return;
+
if (!merge)
goto addit;

diff --git a/arch/x86/pci/intel_bus.c b/arch/x86/pci/intel_bus.c
index f81a2fa..145e0dd 100644
--- a/arch/x86/pci/intel_bus.c
+++ b/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"
@@ -85,7 +87,8 @@ static void __devinit pci_root_bus_res(struct pci_dev *dev)
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_resource(mmioh_base), cap_resource(mmioh_end),
+ IORESOURCE_MEM, 0);

print_ioh_resources(info);
}
diff --git a/include/linux/range.h b/include/linux/range.h
index 0789f14..44c623e 100644
--- a/include/linux/range.h
+++ b/include/linux/range.h
@@ -19,4 +19,12 @@ int clean_sort_range(struct range *range, int az);

void sort_range(struct range *range, int nr_range);

+#define MAX_RESOURCE ((resource_size_t)~0)
+static inline resource_size_t cap_resource(u64 val)
+{
+ if (val > MAX_RESOURCE)
+ return MAX_RESOURCE;
+ else
+ return val;
+}
#endif
--
1.6.4.2


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