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/arch/i386/mach-visws/traps.c

https://bitbucket.org/evzijst/gittest
C | 69 lines | 50 code | 13 blank | 6 comment | 6 complexity | 2372a6fe8514028e563d67b349476c18 MD5 | raw file
 1/* VISWS traps */
 2
 3#include <linux/config.h>
 4#include <linux/sched.h>
 5#include <linux/kernel.h>
 6#include <linux/init.h>
 7#include <linux/pci.h>
 8#include <linux/pci_ids.h>
 9
10#include <asm/io.h>
11#include <asm/arch_hooks.h>
12#include <asm/apic.h>
13#include "cobalt.h"
14#include "lithium.h"
15
16
17#define A01234 (LI_INTA_0 | LI_INTA_1 | LI_INTA_2 | LI_INTA_3 | LI_INTA_4)
18#define BCD (LI_INTB | LI_INTC | LI_INTD)
19#define ALLDEVS (A01234 | BCD)
20
21static __init void lithium_init(void)
22{
23	set_fixmap(FIX_LI_PCIA, LI_PCI_A_PHYS);
24	set_fixmap(FIX_LI_PCIB, LI_PCI_B_PHYS);
25
26	if ((li_pcia_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
27	    (li_pcia_read16(PCI_DEVICE_ID) != PCI_VENDOR_ID_SGI_LITHIUM)) {
28		printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'A');
29		panic("This machine is not SGI Visual Workstation 320/540");
30	}
31
32	if ((li_pcib_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
33	    (li_pcib_read16(PCI_DEVICE_ID) != PCI_VENDOR_ID_SGI_LITHIUM)) {
34		printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'B');
35		panic("This machine is not SGI Visual Workstation 320/540");
36	}
37
38	li_pcia_write16(LI_PCI_INTEN, ALLDEVS);
39	li_pcib_write16(LI_PCI_INTEN, ALLDEVS);
40}
41
42static __init void cobalt_init(void)
43{
44	/*
45	 * On normal SMP PC this is used only with SMP, but we have to
46	 * use it and set it up here to start the Cobalt clock
47	 */
48	set_fixmap(FIX_APIC_BASE, APIC_DEFAULT_PHYS_BASE);
49	setup_local_APIC();
50	printk(KERN_INFO "Local APIC Version %#lx, ID %#lx\n",
51		apic_read(APIC_LVR), apic_read(APIC_ID));
52
53	set_fixmap(FIX_CO_CPU, CO_CPU_PHYS);
54	set_fixmap(FIX_CO_APIC, CO_APIC_PHYS);
55	printk(KERN_INFO "Cobalt Revision %#lx, APIC ID %#lx\n",
56		co_cpu_read(CO_CPU_REV), co_apic_read(CO_APIC_ID));
57
58	/* Enable Cobalt APIC being careful to NOT change the ID! */
59	co_apic_write(CO_APIC_ID, co_apic_read(CO_APIC_ID) | CO_APIC_ENABLE);
60
61	printk(KERN_INFO "Cobalt APIC enabled: ID reg %#lx\n",
62		co_apic_read(CO_APIC_ID));
63}
64
65void __init trap_init_hook(void)
66{
67	lithium_init();
68	cobalt_init();
69}