2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2000, 2001 Keith M Wesolowski
7 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
9 #include <linux/config.h>
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/interrupt.h>
13 #include <linux/pci.h>
14 #include <linux/types.h>
15 #include <asm/ip32/mace.h>
16 #include <asm/ip32/ip32_ints.h>
21 * Handle errors from the bridge. This includes master and target aborts,
22 * various command and address errors, and the interrupt test. This gets
23 * registered on the bridge error irq. It's conceivable that some of these
24 * conditions warrant a panic. Anybody care to say which ones?
26 static irqreturn_t macepci_error(int irq, void *dev, struct pt_regs *regs)
29 unsigned int flags = mace->pci.error;
30 unsigned int addr = mace->pci.error_addr;
32 if (flags & MACEPCI_ERROR_MEMORY_ADDR)
34 else if (flags & MACEPCI_ERROR_CONFIG_ADDR)
39 if (flags & MACEPCI_ERROR_MASTER_ABORT) {
40 printk("MACEPCI: Master abort at 0x%08x (%c)\n", addr, s);
41 flags &= ~MACEPCI_ERROR_MASTER_ABORT;
43 if (flags & MACEPCI_ERROR_TARGET_ABORT) {
44 printk("MACEPCI: Target abort at 0x%08x (%c)\n", addr, s);
45 flags &= ~MACEPCI_ERROR_TARGET_ABORT;
47 if (flags & MACEPCI_ERROR_DATA_PARITY_ERR) {
48 printk("MACEPCI: Data parity error at 0x%08x (%c)\n", addr, s);
49 flags &= ~MACEPCI_ERROR_DATA_PARITY_ERR;
51 if (flags & MACEPCI_ERROR_RETRY_ERR) {
52 printk("MACEPCI: Retry error at 0x%08x (%c)\n", addr, s);
53 flags &= ~MACEPCI_ERROR_RETRY_ERR;
55 if (flags & MACEPCI_ERROR_ILLEGAL_CMD) {
56 printk("MACEPCI: Illegal command at 0x%08x (%c)\n", addr, s);
57 flags &= ~MACEPCI_ERROR_ILLEGAL_CMD;
59 if (flags & MACEPCI_ERROR_SYSTEM_ERR) {
60 printk("MACEPCI: System error at 0x%08x (%c)\n", addr, s);
61 flags &= ~MACEPCI_ERROR_SYSTEM_ERR;
63 if (flags & MACEPCI_ERROR_PARITY_ERR) {
64 printk("MACEPCI: Parity error at 0x%08x (%c)\n", addr, s);
65 flags &= ~MACEPCI_ERROR_PARITY_ERR;
67 if (flags & MACEPCI_ERROR_OVERRUN) {
68 printk("MACEPCI: Overrun error at 0x%08x (%c)\n", addr, s);
69 flags &= ~MACEPCI_ERROR_OVERRUN;
71 if (flags & MACEPCI_ERROR_SIG_TABORT) {
72 printk("MACEPCI: Signaled target abort (clearing)\n");
73 flags &= ~MACEPCI_ERROR_SIG_TABORT;
75 if (flags & MACEPCI_ERROR_INTERRUPT_TEST) {
76 printk("MACEPCI: Interrupt test triggered (clearing)\n");
77 flags &= ~MACEPCI_ERROR_INTERRUPT_TEST;
80 mace->pci.error = flags;
86 extern struct pci_ops mace_pci_ops;
88 static struct resource mace_pci_mem_resource = {
89 .name = "SGI O2 PCI MEM",
90 .start = MACEPCI_HI_MEMORY,
92 .flags = IORESOURCE_MEM,
94 static struct resource mace_pci_io_resource = {
95 .name = "SGI O2 PCI IO",
96 .start = 0x00000000UL,
98 .flags = IORESOURCE_IO,
100 #define MACE_PCI_MEM_OFFSET 0x200000000
102 static struct resource mace_pci_mem_resource = {
103 .name = "SGI O2 PCI MEM",
104 .start = MACEPCI_LOW_MEMORY,
105 .end = MACEPCI_LOW_MEMORY + 0x2000000 - 1,
106 .flags = IORESOURCE_MEM,
108 static struct resource mace_pci_io_resource = {
109 .name = "SGI O2 PCI IO",
112 .flags = IORESOURCE_IO,
114 #define MACE_PCI_MEM_OFFSET (MACEPCI_LOW_MEMORY - 0x80000000)
116 static struct pci_controller mace_pci_controller = {
117 .pci_ops = &mace_pci_ops,
118 .mem_resource = &mace_pci_mem_resource,
119 .io_resource = &mace_pci_io_resource,
121 .mem_offset = MACE_PCI_MEM_OFFSET,
125 static int __init mace_init(void)
127 PCIBIOS_MIN_IO = 0x1000;
129 /* Clear any outstanding errors and enable interrupts */
130 mace->pci.error_addr = 0;
132 mace->pci.control = 0xff008500;
134 printk("MACE PCI rev %d\n", mace->pci.rev);
136 BUG_ON(request_irq(MACE_PCI_BRIDGE_IRQ, macepci_error, 0,
137 "MACE PCI error", NULL));
139 ioport_resource.end = mace_pci_io_resource.end;
140 register_pci_controller(&mace_pci_controller);
145 arch_initcall(mace_init);