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x86, amd-nb: Cleanup AMD northbridge caching code

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Support more than just the "Misc Control" part of the northbridges.
Support more flags by turning "gart_supported" into a single bit flag
that is stored in a flags member. Clean up related code by using a set
of functions (amd_nb_num(), amd_nb_has_feature() and node_to_amd_nb())
instead of accessing the NB data structures directly. Reorder the
initialization code and put the GART flush words caching in a separate
function.

Signed-off-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This commit is contained in:
Hans Rosenfeld
2010-10-29 17:14:31 +02:00
committed by Borislav Petkov
parent eec1d4fa00
commit 9653a5c76c
6 changed files with 120 additions and 90 deletions
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36
arch/x86/include/asm/amd_nb.h
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@@ -3,36 +3,52 @@
#include <linux/pci.h>
extern struct pci_device_id amd_nb_ids[];
extern struct pci_device_id amd_nb_misc_ids[];
struct bootnode;
extern int early_is_amd_nb(u32 value);
extern int cache_amd_northbridges(void);
extern int amd_cache_northbridges(void);
extern void amd_flush_garts(void);
extern int amd_get_nodes(struct bootnode *nodes);
extern int amd_numa_init(unsigned long start_pfn, unsigned long end_pfn);
extern int amd_scan_nodes(void);
struct amd_northbridge {
struct pci_dev *misc;
};
struct amd_northbridge_info {
u16 num;
u8 gart_supported;
struct pci_dev **nb_misc;
u64 flags;
struct amd_northbridge *nb;
};
extern struct amd_northbridge_info amd_northbridges;
#define AMD_NB_GART 0x1
#ifdef CONFIG_AMD_NB
static inline struct pci_dev *node_to_amd_nb_misc(int node)
static inline int amd_nb_num(void)
{
return (node < amd_northbridges.num) ? amd_northbridges.nb_misc[node] : NULL;
return amd_northbridges.num;
}
static inline int amd_nb_has_feature(int feature)
{
return ((amd_northbridges.flags & feature) == feature);
}
static inline struct amd_northbridge *node_to_amd_nb(int node)
{
return (node < amd_northbridges.num) ? &amd_northbridges.nb[node] : NULL;
}
#else
static inline struct pci_dev *node_to_amd_nb_misc(int node)
{
return NULL;
}
#define amd_nb_num(x) 0
#define amd_nb_has_feature(x) false
#define node_to_amd_nb(x) NULL
#endif