1 /* cpu.c: Dinky routines to look for the kind of Sparc cpu
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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>
13 #include <asm/system.h>
14 #include <asm/fpumacro.h>
15 #include <asm/cpudata.h>
17 DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
22 char* cpu_name; /* should be enough I hope... */
32 struct 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"},
43 #define NSPARCFPU (sizeof(linux_sparc_fpu)/sizeof(struct cpu_fp_info))
45 struct cpu_iu_info linux_sparc_chips[] = {
46 { 0x17, 0x10, "TI UltraSparc I (SpitFire)"},
47 { 0x22, 0x10, "TI UltraSparc I (SpitFire)"},
48 { 0x17, 0x11, "TI UltraSparc II (BlackBird)"},
49 { 0x17, 0x12, "TI UltraSparc IIi (Sabre)"},
50 { 0x17, 0x13, "TI UltraSparc IIe (Hummingbird)"},
51 { 0x3e, 0x14, "TI UltraSparc III (Cheetah)"},
52 { 0x3e, 0x15, "TI UltraSparc III+ (Cheetah+)"},
53 { 0x3e, 0x16, "TI UltraSparc IIIi (Jalapeno)"},
56 #define NSPARCCHIPS (sizeof(linux_sparc_chips)/sizeof(struct cpu_iu_info))
58 char *sparc_cpu_type = "cpu-oops";
59 char *sparc_fpu_type = "fpu-oops";
61 unsigned int fsr_storage;
63 void __init cpu_probe(void)
65 unsigned long ver, fpu_vers, manuf, impl, fprs;
70 __asm__ __volatile__ ("rdpr %%ver, %0; stx %%fsr, [%1]"
75 manuf = ((ver >> 48) & 0xffff);
76 impl = ((ver >> 32) & 0xffff);
78 fpu_vers = ((fpu_vers >> 17) & 0x7);
81 for (i = 0; i < NSPARCCHIPS; i++) {
82 if (linux_sparc_chips[i].manuf == manuf) {
83 if (linux_sparc_chips[i].impl == impl) {
85 linux_sparc_chips[i].cpu_name;
91 if (i == NSPARCCHIPS) {
92 /* Maybe it is a cheetah+ derivative, report it as cheetah+
93 * in that case until we learn the real names.
100 printk("DEBUG: manuf[%lx] impl[%lx]\n",
103 sparc_cpu_type = "Unknown CPU";
106 for (i = 0; i < NSPARCFPU; i++) {
107 if (linux_sparc_fpu[i].manuf == manuf &&
108 linux_sparc_fpu[i].impl == impl) {
109 if (linux_sparc_fpu[i].fpu_vers == fpu_vers) {
111 linux_sparc_fpu[i].fp_name;
117 if (i == NSPARCFPU) {
118 printk("DEBUG: manuf[%lx] impl[%lx] fsr.vers[%lx]\n",
119 manuf, impl, fpu_vers);
120 sparc_fpu_type = "Unknown FPU";