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-rw-r--r--arch/x86/mach-visws/mpparse.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/x86/mach-visws/mpparse.c b/arch/x86/mach-visws/mpparse.c
new file mode 100644
index 000000000000..f3c74fab8b95
--- /dev/null
+++ b/arch/x86/mach-visws/mpparse.c
@@ -0,0 +1,101 @@
1
2#include <linux/init.h>
3#include <linux/smp.h>
4
5#include <asm/smp.h>
6#include <asm/io.h>
7
8#include "cobalt.h"
9#include "mach_apic.h"
10
11/* Have we found an MP table */
12int smp_found_config;
13
14/*
15 * Various Linux-internal data structures created from the
16 * MP-table.
17 */
18int apic_version [MAX_APICS];
19
20int pic_mode;
21unsigned long mp_lapic_addr;
22
23/* Processor that is doing the boot up */
24unsigned int boot_cpu_physical_apicid = -1U;
25
26/* Bitmask of physically existing CPUs */
27physid_mask_t phys_cpu_present_map;
28
29unsigned int __initdata maxcpus = NR_CPUS;
30
31/*
32 * The Visual Workstation is Intel MP compliant in the hardware
33 * sense, but it doesn't have a BIOS(-configuration table).
34 * No problem for Linux.
35 */
36
37static void __init MP_processor_info (struct mpc_config_processor *m)
38{
39 int ver, logical_apicid;
40 physid_mask_t apic_cpus;
41
42 if (!(m->mpc_cpuflag & CPU_ENABLED))
43 return;
44
45 logical_apicid = m->mpc_apicid;
46 printk(KERN_INFO "%sCPU #%d %ld:%ld APIC version %d\n",
47 m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
48 m->mpc_apicid,
49 (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
50 (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
51 m->mpc_apicver);
52
53 if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
54 boot_cpu_physical_apicid = m->mpc_apicid;
55
56 ver = m->mpc_apicver;
57 if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
58 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
59 m->mpc_apicid, MAX_APICS);
60 return;
61 }
62
63 apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
64 physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
65 /*
66 * Validate version
67 */
68 if (ver == 0x0) {
69 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
70 "fixing up to 0x10. (tell your hw vendor)\n",
71 m->mpc_apicid);
72 ver = 0x10;
73 }
74 apic_version[m->mpc_apicid] = ver;
75}
76
77void __init find_smp_config(void)
78{
79 struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
80 unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
81
82 if (ncpus > CO_CPU_MAX) {
83 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
84 ncpus, mp);
85
86 ncpus = CO_CPU_MAX;
87 }
88
89 if (ncpus > maxcpus)
90 ncpus = maxcpus;
91
92 smp_found_config = 1;
93 while (ncpus--)
94 MP_processor_info(mp++);
95
96 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
97}
98
99void __init get_smp_config (void)
100{
101}