diff options
Diffstat (limited to 'src/mainboard/asus/a88xm-e/irq_tables.c')
-rw-r--r-- | src/mainboard/asus/a88xm-e/irq_tables.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/mainboard/asus/a88xm-e/irq_tables.c b/src/mainboard/asus/a88xm-e/irq_tables.c new file mode 100644 index 0000000000..7ca1c4b951 --- /dev/null +++ b/src/mainboard/asus/a88xm-e/irq_tables.c @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <arch/pirq_routing.h> +#include <console/console.h> +#include <device/pci_def.h> +#include <string.h> + +static void write_pirq_info(struct irq_info *pirq_info, u8 bus, u8 devfn, + u8 link0, u16 bitmap0, u8 link1, u16 bitmap1, + u8 link2, u16 bitmap2, u8 link3, u16 bitmap3, u8 slot, u8 rfu) +{ + pirq_info->bus = bus; + pirq_info->devfn = devfn; + pirq_info->irq[0].link = link0; + pirq_info->irq[0].bitmap = bitmap0; + pirq_info->irq[1].link = link1; + pirq_info->irq[1].bitmap = bitmap1; + pirq_info->irq[2].link = link2; + pirq_info->irq[2].bitmap = bitmap2; + pirq_info->irq[3].link = link3; + pirq_info->irq[3].bitmap = bitmap3; + pirq_info->slot = slot; + pirq_info->rfu = rfu; +} + +unsigned long write_pirq_routing_table(unsigned long addr) +{ + struct irq_routing_table *pirq; + struct irq_info *pirq_info; + u32 slot_num; + + u8 sum = 0; + int i; + + /* Align the table to be 16 byte aligned. */ + addr = ALIGN_UP(addr, 16); + + /* This table must be between 0xf0000 & 0x100000 */ + printk(BIOS_INFO, "Writing IRQ routing tables to 0x%lx...", addr); + + pirq = (void *)(addr); + + pirq->signature = PIRQ_SIGNATURE; + pirq->version = PIRQ_VERSION; + + pirq->rtr_bus = 0; + pirq->rtr_devfn = PCI_DEVFN(0x14, 4); + + pirq->exclusive_irqs = 0; + + pirq->rtr_vendor = 0x1002; + pirq->rtr_device = 0x4384; + + pirq->miniport_data = 0; + + memset(pirq->rfu, 0, sizeof(pirq->rfu)); + + pirq_info = (void *)(&pirq->slots); + slot_num = 0; + + /* pci bridge */ + write_pirq_info(pirq_info, 0, PCI_DEVFN(0x14, 4), + 0x1, 0xdef8, 0x2, 0xdef8, 0x3, 0xdef8, 0x4, 0xdef8, 0, 0); + pirq_info++; + + slot_num++; + + pirq->size = 32 + 16 * slot_num; + + { + const u8 *const v = (u8 *)(pirq); + for (i = 0; i < pirq->size; i++) + sum += v[i]; + } + + sum = pirq->checksum - sum; + + if (sum != pirq->checksum) + pirq->checksum = sum; + + printk(BIOS_INFO, "%s done.\n", __func__); + + return (unsigned long)pirq_info; +} |