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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/sparc64/kernel/cpu.c
Linux-2.6.12-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/sparc64/kernel/cpu.c')
-rw-r--r--arch/sparc64/kernel/cpu.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/cpu.c b/arch/sparc64/kernel/cpu.c
new file mode 100644
index 00000000000..48756958116
--- /dev/null
+++ b/arch/sparc64/kernel/cpu.c
@@ -0,0 +1,124 @@
1/* cpu.c: Dinky routines to look for the kind of Sparc cpu
2 * we are on.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#include <linux/config.h>
8#include <linux/kernel.h>
9#include <linux/init.h>
10#include <linux/sched.h>
11#include <linux/smp.h>
12#include <asm/asi.h>
13#include <asm/system.h>
14#include <asm/fpumacro.h>
15#include <asm/cpudata.h>
16
17DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
18
19struct cpu_iu_info {
20 short manuf;
21 short impl;
22 char* cpu_name; /* should be enough I hope... */
23};
24
25struct cpu_fp_info {
26 short manuf;
27 short impl;
28 char fpu_vers;
29 char* fp_name;
30};
31
32struct cpu_fp_info linux_sparc_fpu[] = {
33 { 0x17, 0x10, 0, "UltraSparc I integrated FPU"},
34 { 0x22, 0x10, 0, "UltraSparc I integrated FPU"},
35 { 0x17, 0x11, 0, "UltraSparc II integrated FPU"},
36 { 0x17, 0x12, 0, "UltraSparc IIi integrated FPU"},
37 { 0x17, 0x13, 0, "UltraSparc IIe integrated FPU"},
38 { 0x3e, 0x14, 0, "UltraSparc III integrated FPU"},
39 { 0x3e, 0x15, 0, "UltraSparc III+ integrated FPU"},
40 { 0x3e, 0x16, 0, "UltraSparc IIIi integrated FPU"},
41 { 0x3e, 0x18, 0, "UltraSparc IV integrated FPU"},
42};
43
44#define NSPARCFPU (sizeof(linux_sparc_fpu)/sizeof(struct cpu_fp_info))
45
46struct cpu_iu_info linux_sparc_chips[] = {
47 { 0x17, 0x10, "TI UltraSparc I (SpitFire)"},
48 { 0x22, 0x10, "TI UltraSparc I (SpitFire)"},
49 { 0x17, 0x11, "TI UltraSparc II (BlackBird)"},
50 { 0x17, 0x12, "TI UltraSparc IIi (Sabre)"},
51 { 0x17, 0x13, "TI UltraSparc IIe (Hummingbird)"},
52 { 0x3e, 0x14, "TI UltraSparc III (Cheetah)"},
53 { 0x3e, 0x15, "TI UltraSparc III+ (Cheetah+)"},
54 { 0x3e, 0x16, "TI UltraSparc IIIi (Jalapeno)"},
55 { 0x3e, 0x18, "TI UltraSparc IV (Jaguar)"},
56};
57
58#define NSPARCCHIPS (sizeof(linux_sparc_chips)/sizeof(struct cpu_iu_info))
59
60char *sparc_cpu_type = "cpu-oops";
61char *sparc_fpu_type = "fpu-oops";
62
63unsigned int fsr_storage;
64
65void __init cpu_probe(void)
66{
67 unsigned long ver, fpu_vers, manuf, impl, fprs;
68 int i;
69
70 fprs = fprs_read();
71 fprs_write(FPRS_FEF);
72 __asm__ __volatile__ ("rdpr %%ver, %0; stx %%fsr, [%1]"
73 : "=&r" (ver)
74 : "r" (&fpu_vers));
75 fprs_write(fprs);
76
77 manuf = ((ver >> 48) & 0xffff);
78 impl = ((ver >> 32) & 0xffff);
79
80 fpu_vers = ((fpu_vers >> 17) & 0x7);
81
82retry:
83 for (i = 0; i < NSPARCCHIPS; i++) {
84 if (linux_sparc_chips[i].manuf == manuf) {
85 if (linux_sparc_chips[i].impl == impl) {
86 sparc_cpu_type =
87 linux_sparc_chips[i].cpu_name;
88 break;
89 }
90 }
91 }
92
93 if (i == NSPARCCHIPS) {
94 /* Maybe it is a cheetah+ derivative, report it as cheetah+
95 * in that case until we learn the real names.
96 */
97 if (manuf == 0x3e &&
98 impl > 0x15) {
99 impl = 0x15;
100 goto retry;
101 } else {
102 printk("DEBUG: manuf[%lx] impl[%lx]\n",
103 manuf, impl);
104 }
105 sparc_cpu_type = "Unknown CPU";
106 }
107
108 for (i = 0; i < NSPARCFPU; i++) {
109 if (linux_sparc_fpu[i].manuf == manuf &&
110 linux_sparc_fpu[i].impl == impl) {
111 if (linux_sparc_fpu[i].fpu_vers == fpu_vers) {
112 sparc_fpu_type =
113 linux_sparc_fpu[i].fp_name;
114 break;
115 }
116 }
117 }
118
119 if (i == NSPARCFPU) {
120 printk("DEBUG: manuf[%lx] impl[%lx] fsr.vers[%lx]\n",
121 manuf, impl, fpu_vers);
122 sparc_fpu_type = "Unknown FPU";
123 }
124}