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x86/pci: Add cap_resource()

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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
-v4: according to Andrew, use min in cap_resource()

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <1265793639-15071-8-git-send-email-yinghai@kernel.org>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Yinghai Lu 2010-02-10 01:20:11 -08:00 committed by H. Peter Anvin
parent 97445c3b86
commit 9ad3f2c7c6
3 changed files with 17 additions and 3 deletions
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8
arch/x86/pci/amd_bus.c
View file

@ -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);
}
}

4
arch/x86/pci/bus_numa.c
View file

@ -1,5 +1,6 @@
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/range.h>
#include "bus_numa.h"
@ -55,6 +56,9 @@ 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;

8
include/linux/range.h
View file

@ -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;
return val;
}
#endif