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#ifndef _ASM_X86_AMD_NB_H
#define _ASM_X86_AMD_NB_H

#include <linux/ioport.h>
#include <linux/pci.h>

struct amd_nb_bus_dev_range {
	u8 bus;
	u8 dev_base;
	u8 dev_limit;
};

extern const struct pci_device_id amd_nb_misc_ids[];
extern const struct amd_nb_bus_dev_range amd_nb_bus_dev_ranges[];

extern bool early_is_amd_nb(u32 value);
extern struct resource *amd_get_mmconfig_range(struct resource *res);
extern int amd_cache_northbridges(void);
extern void amd_flush_garts(void);
extern int amd_scan_nodes(unsigned long start, unsigned long end);
extern int amd_get_subcaches(int);
extern int amd_set_subcaches(int, int);

struct amd_northbridge {
	struct pci_dev *misc;
	struct pci_dev *link;
};

struct amd_northbridge_info {
	u16 num;
	u64 flags;
	struct amd_northbridge *nb;
};
extern struct amd_northbridge_info amd_northbridges;

#define AMD_NB_GART			BIT(0)
#define AMD_NB_L3_INDEX_DISABLE		BIT(1)
#define AMD_NB_L3_PARTITIONING		BIT(2)

#ifdef CONFIG_AMD_NB

static inline u16 amd_nb_num(void)
{
	return amd_northbridges.num;
}

static inline bool amd_nb_has_feature(unsigned 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;
}

static inline bool amd_gart_present(void)
{
	/* GART present only on Fam15h, upto model 0fh */
	if (boot_cpu_data.x86 == 0xf || boot_cpu_data.x86 == 0x10 ||
	    (boot_cpu_data.x86 == 0x15 && boot_cpu_data.x86_model < 0x10))
		return true;

	return false;
}

#else

#define amd_nb_num(x)		0
#define amd_nb_has_feature(x)	false
#define node_to_amd_nb(x)	NULL
#define amd_gart_present(x)	false

#endif


#endif /* _ASM_X86_AMD_NB_H */

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