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 000000000000..48756958116b
--- /dev/null
+++ b/arch/sparc64/kernel/cpu.c
@@ -0,0 +1,124 @@
+/* cpu.c: Dinky routines to look for the kind of Sparc cpu
+ *        we are on.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <asm/asi.h>
+#include <asm/system.h>
+#include <asm/fpumacro.h>
+#include <asm/cpudata.h>
+
+DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
+
+struct cpu_iu_info {
+  short manuf;
+  short impl;
+  char* cpu_name;   /* should be enough I hope... */
+};
+
+struct cpu_fp_info {
+  short manuf;
+  short impl;
+  char fpu_vers;
+  char* fp_name;
+};
+
+struct cpu_fp_info linux_sparc_fpu[] = {
+  { 0x17, 0x10, 0, "UltraSparc I integrated FPU"},
+  { 0x22, 0x10, 0, "UltraSparc I integrated FPU"},
+  { 0x17, 0x11, 0, "UltraSparc II integrated FPU"},
+  { 0x17, 0x12, 0, "UltraSparc IIi integrated FPU"},
+  { 0x17, 0x13, 0, "UltraSparc IIe integrated FPU"},
+  { 0x3e, 0x14, 0, "UltraSparc III integrated FPU"},
+  { 0x3e, 0x15, 0, "UltraSparc III+ integrated FPU"},
+  { 0x3e, 0x16, 0, "UltraSparc IIIi integrated FPU"},
+  { 0x3e, 0x18, 0, "UltraSparc IV integrated FPU"},
+};
+
+#define NSPARCFPU  (sizeof(linux_sparc_fpu)/sizeof(struct cpu_fp_info))
+
+struct cpu_iu_info linux_sparc_chips[] = {
+  { 0x17, 0x10, "TI UltraSparc I   (SpitFire)"},
+  { 0x22, 0x10, "TI UltraSparc I   (SpitFire)"},
+  { 0x17, 0x11, "TI UltraSparc II  (BlackBird)"},
+  { 0x17, 0x12, "TI UltraSparc IIi (Sabre)"},
+  { 0x17, 0x13, "TI UltraSparc IIe (Hummingbird)"},
+  { 0x3e, 0x14, "TI UltraSparc III (Cheetah)"},
+  { 0x3e, 0x15, "TI UltraSparc III+ (Cheetah+)"},
+  { 0x3e, 0x16, "TI UltraSparc IIIi (Jalapeno)"},
+  { 0x3e, 0x18, "TI UltraSparc IV (Jaguar)"},
+};
+
+#define NSPARCCHIPS  (sizeof(linux_sparc_chips)/sizeof(struct cpu_iu_info))
+
+char *sparc_cpu_type = "cpu-oops";
+char *sparc_fpu_type = "fpu-oops";
+
+unsigned int fsr_storage;
+
+void __init cpu_probe(void)
+{
+        unsigned long ver, fpu_vers, manuf, impl, fprs;
+        int i;
+        
+        fprs = fprs_read();
+        fprs_write(FPRS_FEF);
+        __asm__ __volatile__ ("rdpr %%ver, %0; stx %%fsr, [%1]"
+                              : "=&r" (ver)
+                              : "r" (&fpu_vers));
+        fprs_write(fprs);
+        
+        manuf = ((ver >> 48) & 0xffff);
+        impl = ((ver >> 32) & 0xffff);
+
+        fpu_vers = ((fpu_vers >> 17) & 0x7);
+
+retry:
+        for (i = 0; i < NSPARCCHIPS; i++) {
+                if (linux_sparc_chips[i].manuf == manuf) {
+                        if (linux_sparc_chips[i].impl == impl) {
+                                sparc_cpu_type =
+                                        linux_sparc_chips[i].cpu_name;
+                                break;
+                        }
+                }
+        }
+
+        if (i == NSPARCCHIPS) {
+                /* Maybe it is a cheetah+ derivative, report it as cheetah+
+                 * in that case until we learn the real names.
+                 */
+                if (manuf == 0x3e &&
+                    impl > 0x15) {
+                        impl = 0x15;
+                        goto retry;
+                } else {
+                        printk("DEBUG: manuf[%lx] impl[%lx]\n",
+                               manuf, impl);
+                }
+                sparc_cpu_type = "Unknown CPU";
+        }
+
+        for (i = 0; i < NSPARCFPU; i++) {
+                if (linux_sparc_fpu[i].manuf == manuf &&
+                    linux_sparc_fpu[i].impl == impl) {
+                        if (linux_sparc_fpu[i].fpu_vers == fpu_vers) {
+                                sparc_fpu_type =
+                                        linux_sparc_fpu[i].fp_name;
+                                break;
+                        }
+                }
+        }
+
+        if (i == NSPARCFPU) {
+                printk("DEBUG: manuf[%lx] impl[%lx] fsr.vers[%lx]\n",
+                       manuf, impl, fpu_vers);
+                sparc_fpu_type = "Unknown FPU";
+        }
+}