135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/* 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>
|
|
#include <asm/spitfire.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"},
|
|
{ 0x3e, 0x19, 0, "UltraSparc IV+ integrated FPU"},
|
|
{ 0x3e, 0x22, 0, "UltraSparc IIIi+ integrated FPU"},
|
|
};
|
|
|
|
#define NSPARCFPU ARRAY_SIZE(linux_sparc_fpu)
|
|
|
|
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)"},
|
|
{ 0x3e, 0x19, "TI UltraSparc IV+ (Panther)"},
|
|
{ 0x3e, 0x22, "TI UltraSparc IIIi+ (Serrano)"},
|
|
};
|
|
|
|
#define NSPARCCHIPS ARRAY_SIZE(linux_sparc_chips)
|
|
|
|
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;
|
|
|
|
if (tlb_type == hypervisor) {
|
|
sparc_cpu_type = "UltraSparc T1 (Niagara)";
|
|
sparc_fpu_type = "UltraSparc T1 integrated FPU";
|
|
return;
|
|
}
|
|
|
|
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";
|
|
}
|
|
}
|