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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/i386/mach-visws/mpparse.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/i386/mach-visws/mpparse.c')
-rw-r--r--arch/i386/mach-visws/mpparse.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/arch/i386/mach-visws/mpparse.c b/arch/i386/mach-visws/mpparse.c
new file mode 100644
index 000000000000..5a22082147f4
--- /dev/null
+++ b/arch/i386/mach-visws/mpparse.c
@@ -0,0 +1,105 @@
1
2#include <linux/config.h>
3#include <linux/init.h>
4#include <linux/smp.h>
5
6#include <asm/smp.h>
7#include <asm/io.h>
8
9#include "cobalt.h"
10#include "mach_apic.h"
11
12/* Have we found an MP table */
13int smp_found_config;
14
15/*
16 * Various Linux-internal data structures created from the
17 * MP-table.
18 */
19int apic_version [MAX_APICS];
20
21int pic_mode;
22unsigned long mp_lapic_addr;
23
24/* Processor that is doing the boot up */
25unsigned int boot_cpu_physical_apicid = -1U;
26unsigned int boot_cpu_logical_apicid = -1U;
27
28/* Bitmask of physically existing CPUs */
29physid_mask_t phys_cpu_present_map;
30
31unsigned int __initdata maxcpus = NR_CPUS;
32
33/*
34 * The Visual Workstation is Intel MP compliant in the hardware
35 * sense, but it doesn't have a BIOS(-configuration table).
36 * No problem for Linux.
37 */
38
39static void __init MP_processor_info (struct mpc_config_processor *m)
40{
41 int ver, logical_apicid;
42 physid_mask_t apic_cpus;
43
44 if (!(m->mpc_cpuflag & CPU_ENABLED))
45 return;
46
47 logical_apicid = m->mpc_apicid;
48 printk(KERN_INFO "%sCPU #%d %ld:%ld APIC version %d\n",
49 m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
50 m->mpc_apicid,
51 (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
52 (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
53 m->mpc_apicver);
54
55 if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
56 boot_cpu_physical_apicid = m->mpc_apicid;
57 boot_cpu_logical_apicid = logical_apicid;
58 }
59
60 ver = m->mpc_apicver;
61 if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
62 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
63 m->mpc_apicid, MAX_APICS);
64 return;
65 }
66
67 apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
68 physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
69 /*
70 * Validate version
71 */
72 if (ver == 0x0) {
73 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
74 "fixing up to 0x10. (tell your hw vendor)\n",
75 m->mpc_apicid);
76 ver = 0x10;
77 }
78 apic_version[m->mpc_apicid] = ver;
79}
80
81void __init find_smp_config(void)
82{
83 struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
84 unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
85
86 if (ncpus > CO_CPU_MAX) {
87 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
88 ncpus, mp);
89
90 ncpus = CO_CPU_MAX;
91 }
92
93 if (ncpus > maxcpus)
94 ncpus = maxcpus;
95
96 smp_found_config = 1;
97 while (ncpus--)
98 MP_processor_info(mp++);
99
100 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
101}
102
103void __init get_smp_config (void)
104{
105}