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usr
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linux-headers-6.8.0-36
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arch
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x86
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amd_nb.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_AMD_NB_H #define _ASM_X86_AMD_NB_H #include <linux/ioport.h> #include <linux/pci.h> #include <linux/refcount.h> struct amd_nb_bus_dev_range { u8 bus; u8 dev_base; u8 dev_limit; }; 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 void amd_flush_garts(void); extern int amd_numa_init(void); extern int amd_get_subcaches(int); extern int amd_set_subcaches(int, unsigned long); extern int amd_smn_read(u16 node, u32 address, u32 *value); extern int amd_smn_write(u16 node, u32 address, u32 value); struct amd_l3_cache { unsigned indices; u8 subcaches[4]; }; struct threshold_block { unsigned int block; /* Number within bank */ unsigned int bank; /* MCA bank the block belongs to */ unsigned int cpu; /* CPU which controls MCA bank */ u32 address; /* MSR address for the block */ u16 interrupt_enable; /* Enable/Disable APIC interrupt */ bool interrupt_capable; /* Bank can generate an interrupt. */ u16 threshold_limit; /* * Value upon which threshold * interrupt is generated. */ struct kobject kobj; /* sysfs object */ struct list_head miscj; /* * List of threshold blocks * within a bank. */ }; struct threshold_bank { struct kobject *kobj; struct threshold_block *blocks; /* initialized to the number of CPUs on the node sharing this bank */ refcount_t cpus; unsigned int shared; }; struct amd_northbridge { struct pci_dev *root; struct pci_dev *misc; struct pci_dev *link; struct amd_l3_cache l3_cache; struct threshold_bank *bank4; }; struct amd_northbridge_info { u16 num; u64 flags; struct amd_northbridge *nb; }; #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 u16 amd_nb_num(void); bool amd_nb_has_feature(unsigned int feature); struct amd_northbridge *node_to_amd_nb(int node); static inline u16 amd_pci_dev_to_node_id(struct pci_dev *pdev) { struct pci_dev *misc; int i; for (i = 0; i != amd_nb_num(); i++) { misc = node_to_amd_nb(i)->misc; if (pci_domain_nr(misc->bus) == pci_domain_nr(pdev->bus) && PCI_SLOT(misc->devfn) == PCI_SLOT(pdev->devfn)) return i; } WARN(1, "Unable to find AMD Northbridge id for %s\n", pci_name(pdev)); return 0; } static inline bool amd_gart_present(void) { if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) return false; /* GART present only on Fam15h, up to 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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