diff options
Diffstat (limited to 'src/soc/amd/common/block/include/amdblocks/amd_pci_util.h')
| -rw-r--r-- | src/soc/amd/common/block/include/amdblocks/amd_pci_util.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/include/amdblocks/amd_pci_util.h b/src/soc/amd/common/block/include/amdblocks/amd_pci_util.h index 081741ad285b..b9cd1406c943 100644 --- a/src/soc/amd/common/block/include/amdblocks/amd_pci_util.h +++ b/src/soc/amd/common/block/include/amdblocks/amd_pci_util.h @@ -31,7 +31,34 @@ void write_pci_cfg_irqs(void); void write_pci_int_table(void); const struct irq_idx_name *sb_get_apic_reg_association(size_t *size); +enum pci_routing_swizzle { + PCI_SWIZZLE_ABCD = 0, + PCI_SWIZZLE_BCDA, + PCI_SWIZZLE_CDAB, + PCI_SWIZZLE_DABC, +}; + +/** + * Each PCI bridge has its INTx lines routed to one of the GNB IO-APIC PCI + * groups. Each group has 4 interrupts. The INTx lines can be swizzled before + * being routed to the IO-APIC. If the IO-APIC redirection entry is masked, the + * interrupt is reduced modulo 8 onto INT[A-H] and forwarded to the FCH IO-APIC. + **/ +struct pci_routing_info { + uint8_t devfn; + uint8_t group; + uint8_t swizzle; + uint8_t irq; +} __packed; + /* Implemented by the SoC */ void populate_pirq_data(void); +/* Implemented by the SoC */ +const struct pci_routing_info *get_pci_routing_table(size_t *entries); + +const struct pci_routing_info *get_pci_routing_info(unsigned int devfn); + +unsigned int pci_calculate_irq(const struct pci_routing_info *routing_info, unsigned int pin); + #endif /* AMD_BLOCK_PCI_UTIL_H */ |