1 // Initialize PCI devices (on emulators)
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2006 Fabrice Bellard
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "util.h" // dprintf
9 #include "pci.h" // pci_config_readl
10 #include "biosvar.h" // GET_EBDA
11 #include "pci_ids.h" // PCI_VENDOR_ID_INTEL
12 #include "pci_regs.h" // PCI_COMMAND
14 #define PCI_ROM_SLOT 6
15 #define PCI_NUM_REGIONS 7
17 static u32 pci_bios_io_addr;
18 static u32 pci_bios_mem_addr;
19 /* host irqs corresponding to PCI irqs A-D */
20 static u8 pci_irqs[4] = {
24 static void pci_set_io_region_addr(u16 bdf, int region_num, u32 addr)
28 if (region_num == PCI_ROM_SLOT) {
29 ofs = PCI_ROM_ADDRESS;
31 ofs = PCI_BASE_ADDRESS_0 + region_num * 4;
34 old_addr = pci_config_readl(bdf, ofs);
36 pci_config_writel(bdf, ofs, addr);
37 dprintf(1, "region %d: 0x%08x\n", region_num, addr);
40 static void pci_bios_allocate_region(u16 bdf, int region_num)
44 if (region_num == PCI_ROM_SLOT)
45 ofs = PCI_ROM_ADDRESS;
47 ofs = PCI_BASE_ADDRESS_0 + region_num * 4;
49 u32 old = pci_config_readl(bdf, ofs);
51 if (region_num == PCI_ROM_SLOT) {
52 mask = PCI_ROM_ADDRESS_MASK;
53 pci_config_writel(bdf, ofs, mask);
55 if (old & PCI_BASE_ADDRESS_SPACE_IO)
56 mask = PCI_BASE_ADDRESS_IO_MASK;
58 mask = PCI_BASE_ADDRESS_MEM_MASK;
59 pci_config_writel(bdf, ofs, ~0);
61 u32 val = pci_config_readl(bdf, ofs);
62 pci_config_writel(bdf, ofs, old);
65 u32 size = (~(val & mask)) + 1;
66 if (val & PCI_BASE_ADDRESS_SPACE_IO)
67 paddr = &pci_bios_io_addr;
69 paddr = &pci_bios_mem_addr;
70 *paddr = ALIGN(*paddr, size);
71 pci_set_io_region_addr(bdf, region_num, *paddr);
76 static void pci_bios_allocate_regions(u16 bdf)
79 for (i = 0; i < PCI_NUM_REGIONS; i++) {
80 pci_bios_allocate_region(bdf, i);
84 /* return the global irq number corresponding to a given device irq
85 pin. We could also use the bus number to have a more precise
87 static int pci_slot_get_pirq(u16 bdf, int irq_num)
89 int slot_addend = pci_bdf_to_dev(bdf) - 1;
90 return (irq_num + slot_addend) & 3;
93 static void pci_bios_init_bridges(u16 bdf)
95 u16 vendor_id = pci_config_readw(bdf, PCI_VENDOR_ID);
96 u16 device_id = pci_config_readw(bdf, PCI_DEVICE_ID);
98 if (vendor_id == PCI_VENDOR_ID_INTEL
99 && (device_id == PCI_DEVICE_ID_INTEL_82371SB_0
100 || device_id == PCI_DEVICE_ID_INTEL_82371AB_0)) {
104 /* PIIX3/PIIX4 PCI to ISA bridge */
108 for (i = 0; i < 4; i++) {
110 /* set to trigger level */
111 elcr[irq >> 3] |= (1 << (irq & 7));
112 /* activate irq remapping in PIIX */
113 pci_config_writeb(bdf, 0x60 + i, irq);
115 outb(elcr[0], 0x4d0);
116 outb(elcr[1], 0x4d1);
117 dprintf(1, "PIIX3/PIIX4 init: elcr=%02x %02x\n",
122 static void pci_bios_init_device(u16 bdf)
125 int pin, pic_irq, vendor_id, device_id;
127 class = pci_config_readw(bdf, PCI_CLASS_DEVICE);
128 vendor_id = pci_config_readw(bdf, PCI_VENDOR_ID);
129 device_id = pci_config_readw(bdf, PCI_DEVICE_ID);
130 dprintf(1, "PCI: bus=%d devfn=0x%02x: vendor_id=0x%04x device_id=0x%04x\n"
131 , pci_bdf_to_bus(bdf), pci_bdf_to_devfn(bdf), vendor_id, device_id);
133 case PCI_CLASS_STORAGE_IDE:
134 if (vendor_id == PCI_VENDOR_ID_INTEL
135 && (device_id == PCI_DEVICE_ID_INTEL_82371SB_1
136 || device_id == PCI_DEVICE_ID_INTEL_82371AB)) {
137 /* PIIX3/PIIX4 IDE */
138 pci_config_writew(bdf, 0x40, 0x8000); // enable IDE0
139 pci_config_writew(bdf, 0x42, 0x8000); // enable IDE1
140 pci_bios_allocate_regions(bdf);
142 /* IDE: we map it as in ISA mode */
143 pci_set_io_region_addr(bdf, 0, PORT_ATA1_CMD_BASE);
144 pci_set_io_region_addr(bdf, 1, PORT_ATA1_CTRL_BASE);
145 pci_set_io_region_addr(bdf, 2, PORT_ATA2_CMD_BASE);
146 pci_set_io_region_addr(bdf, 3, PORT_ATA2_CTRL_BASE);
149 case PCI_CLASS_SYSTEM_PIC:
151 if (vendor_id == PCI_VENDOR_ID_IBM) {
153 if (device_id == 0x0046 || device_id == 0xFFFF) {
155 pci_set_io_region_addr(bdf, 0, 0x80800000 + 0x00040000);
160 if (vendor_id == PCI_VENDOR_ID_APPLE &&
161 (device_id == 0x0017 || device_id == 0x0022)) {
163 pci_set_io_region_addr(bdf, 0, 0x80800000);
167 /* default memory mappings */
168 pci_bios_allocate_regions(bdf);
172 /* enable memory mappings */
173 pci_config_maskw(bdf, PCI_COMMAND, 0, PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
175 /* map the interrupt */
176 pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
178 pin = pci_slot_get_pirq(bdf, pin - 1);
179 pic_irq = pci_irqs[pin];
180 pci_config_writeb(bdf, PCI_INTERRUPT_LINE, pic_irq);
183 if (vendor_id == PCI_VENDOR_ID_INTEL
184 && device_id == PCI_DEVICE_ID_INTEL_82371AB_3) {
185 /* PIIX4 Power Management device (for ACPI) */
187 // acpi sci is hardwired to 9
188 pci_config_writeb(bdf, PCI_INTERRUPT_LINE, 9);
190 pci_config_writel(bdf, 0x40, PORT_ACPI_PM_BASE | 1);
191 pci_config_writeb(bdf, 0x80, 0x01); /* enable PM io space */
192 pci_config_writel(bdf, 0x90, PORT_SMB_BASE | 1);
193 pci_config_writeb(bdf, 0xd2, 0x09); /* enable SMBus io space */
201 // Already done by coreboot.
204 dprintf(3, "pci setup\n");
206 pci_bios_io_addr = 0xc000;
207 pci_bios_mem_addr = BUILD_PCIMEM_START;
210 foreachpci(bdf, max) {
211 pci_bios_init_bridges(bdf);
213 foreachpci(bdf, max) {
214 pci_bios_init_device(bdf);