Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

sun4 cpu types are determined by the idprom.

Browse Source 
cache type is determined by the model number.
This commit is contained in:
deraadt 1994-08-20 01:32:45 +00:00
parent 27e092990f
commit 0103734add
1 changed files with 76 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
sys/arch/sparc/sparc/cpu.c
View File

@ -42,7 +42,7 @@
* @(#)cpu.c 8.1 (Berkeley) 6/11/93
*
* from: Header: cpu.c,v 1.12 93/05/03 09:47:57 torek Exp (LBL)
* $Id: cpu.c,v 1.7 1994/05/19 07:12:49 deraadt Exp $
* $Id: cpu.c,v 1.8 1994/08/20 01:32:45 deraadt Exp $
*/
#include <sys/param.h>
@ -52,9 +52,14 @@
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/trap.h>
#include <machine/idprom.h>
#include <sparc/sparc/cache.h>
#ifdef SUN4
extern struct idprom idprom;
#endif
/* This is declared here so that you must include a CPU for the cache code. */
struct cacheinfo cacheinfo;
@ -110,7 +115,7 @@ cpu_attach(parent, dev, aux)
struct device *dev;
void *aux;
{
register int node, clk, i, l;
register int node, clk, bug = 0, i, l;
register int impl, vers, fver;
register char *fpuname;
struct fpstate fpstate;
@ -139,40 +144,83 @@ cpu_attach(parent, dev, aux)
/* tell them what we have */
node = ((struct romaux *)aux)->ra_node;
clk = getpropint(node, "clock-frequency", 0);
sprintf(cpu_model, "%s (%s @ %s MHz, %s FPU)",
getpropstring(node, "name"),
psrtoname(impl, vers, fver, iubuf), clockfreq(clk), fpuname);
printf(": %s\n", cpu_model);
#ifdef SUN4
if (cputyp == CPU_SUN4) {
clk = 0;
vactype = VAC_WRITEBACK;
switch (idprom.id_machine) {
case SUN4_100:
sprintf(cpu_model,"SUN-4/100 series (%s FPU)", fpuname);
cacheinfo.c_totalsize = 0;
cacheinfo.c_hwflush = 0;
cacheinfo.c_linesize = 0;
cacheinfo.c_l2linesize = 0;
break;
case SUN4_200:
sprintf(cpu_model,"SUN-4/200 series (%s FPU)", fpuname);
cacheinfo.c_totalsize = 128*1024;
cacheinfo.c_hwflush = 0;
cacheinfo.c_linesize = 16;
cacheinfo.c_l2linesize = 4;
break;
case SUN4_300:
sprintf(cpu_model,"SUN-4/300 series (%s FPU)", fpuname);
bug = 1;
cacheinfo.c_totalsize = 128*1024;
cacheinfo.c_hwflush = 0;
cacheinfo.c_linesize = 16;
cacheinfo.c_l2linesize = 4;
break;
case SUN4_400:
sprintf(cpu_model,"SUN-4/400 series (%s FPU)", fpuname);
cacheinfo.c_totalsize = 128 * 1024;
cacheinfo.c_hwflush = 0;
cacheinfo.c_linesize = 32;
cacheinfo.c_l2linesize = 5;
break;
}
printf(": %s\n", cpu_model);
}
#endif
#if defined(SUN4C) || defined(SUN4M)
if (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) {
clk = getpropint(node, "clock-frequency", 0);
sprintf(cpu_model, "%s (%s @ %s MHz, %s FPU)",
getpropstring(node, "name"),
psrtoname(impl, vers, fver, iubuf), clockfreq(clk), fpuname);
printf(": %s\n", cpu_model);
/*
* Fill in the cache info. Note, vac-hwflush is spelled
* with an underscore on 4/75s.
*/
cacheinfo.c_totalsize = getpropint(node, "vac-size", 65536);
cacheinfo.c_hwflush = getpropint(node, "vac_hwflush", 0) |
getpropint(node, "vac-hwflush", 0);
cacheinfo.c_linesize = l = getpropint(node, "vac-linesize", 16);
for (i = 0; (1 << i) < l; i++)
/* void */;
if ((1 << i) != l)
panic("bad cache line size %d", l);
cacheinfo.c_l2linesize = i;
vactype = VAC_WRITETHROUGH;
/*
* Fill in the cache info. Note, vac-hwflush is spelled
* with an underscore on 4/75s.
*/
cacheinfo.c_totalsize = getpropint(node, "vac-size", 65536);
cacheinfo.c_hwflush = getpropint(node, "vac_hwflush", 0) |
getpropint(node, "vac-hwflush", 0);
cacheinfo.c_linesize = l = getpropint(node, "vac-linesize", 16);
for (i = 0; (1 << i) < l; i++)
/* void */;
if ((1 << i) != l)
panic("bad cache line size %d", l);
cacheinfo.c_l2linesize = i;
vactype = VAC_WRITETHROUGH;
/*
* Machines with "buserr-type" 1 have a bug in the cache
* chip that affects traps. (I wish I knew more about this
* mysterious buserr-type variable....)
*/
if (getpropint(node, "buserr-type", 0) == 1) {
/*
* Machines with "buserr-type" 1 have a bug in the cache
* chip that affects traps. (I wish I knew more about this
* mysterious buserr-type variable....)
*/
bug = (getpropint(node, "buserr-type", 0) == 1);
}
#endif /* SUN4C || SUN4M */
if (bug) {
kvm_uncache((caddr_t)trapbase, 1);
printf("%s: cache chip bug; trap page uncached\n",
dev->dv_xname);
}
printf("%s: %d byte write-through, %d bytes/line, %cw flush ",
dev->dv_xname, cacheinfo.c_totalsize, l,
dev->dv_xname, cacheinfo.c_totalsize, cacheinfo.c_linesize,
cacheinfo.c_hwflush ? 'h' : 's');
cache_enable();
}