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/* $OpenBSD: cpu.c,v 1.11 2020/07/10 23:22:48 gkoehler Exp $ */
/*
* Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/fdt.h>
/* CPU Identification. */
#define CPU_IBMPOWER8E 0x004b
#define CPU_IBMPOWER8NVL 0x004c
#define CPU_IBMPOWER8 0x004d
#define CPU_IBMPOWER9 0x004e
#define CPU_VERSION(pvr) ((pvr) >> 16)
#define CPU_REV_MAJ(pvr) (((pvr) >> 8) & 0xf)
#define CPU_REV_MIN(pvr) (((pvr) >> 0) & 0xf)
struct cpu_version {
int version;
const char *name;
};
struct cpu_version cpu_version[] = {
{ CPU_IBMPOWER8, "IBM POWER8" },
{ CPU_IBMPOWER8E, "IBM POWER8E" },
{ CPU_IBMPOWER8NVL, "IBM POWER8NVL" },
{ CPU_IBMPOWER9, "IBM POWER9" },
{ 0, NULL }
};
char cpu_model[64];
uint64_t tb_freq = 512000000; /* POWER8, POWER9 */
struct cpu_info cpu_info_primary;
int cpu_match(struct device *, void *, void *);
void cpu_attach(struct device *, struct device *, void *);
struct cfattach cpu_ca = {
sizeof(struct device), cpu_match, cpu_attach
};
struct cfdriver cpu_cd = {
NULL, "cpu", DV_DULL
};
int
cpu_match(struct device *parent, void *cfdata, void *aux)
{
struct fdt_attach_args *faa = aux;
char buf[32];
if (OF_getprop(faa->fa_node, "device_type", buf, sizeof(buf)) <= 0 ||
strcmp(buf, "cpu") != 0)
return 0;
if (ncpus < MAXCPUS || faa->fa_reg[0].addr == mfpir())
return 1;
return 0;
}
void
cpu_attach(struct device *parent, struct device *dev, void *aux)
{
struct fdt_attach_args *faa = aux;
const char *name = NULL;
uint32_t pvr, clock_freq, iline, dline;
int node, level, i;
printf(" pir %llx", faa->fa_reg[0].addr);
pvr = mfpvr();
for (i = 0; cpu_version[i].name; i++) {
if (CPU_VERSION(pvr) == cpu_version[i].version) {
name = cpu_version[i].name;
break;
}
}
if (name) {
printf(": %s %d.%d", name, CPU_REV_MAJ(pvr), CPU_REV_MIN(pvr));
snprintf(cpu_model, sizeof(cpu_model), "%s %d.%d",
name, CPU_REV_MAJ(pvr), CPU_REV_MIN(pvr));
} else {
printf(": Unknown, PVR 0x%x", pvr);
strlcpy(cpu_model, "Unknown", sizeof(cpu_model));
}
node = faa->fa_node;
clock_freq = OF_getpropint(node, "clock-frequency", 0);
if (clock_freq != 0) {
clock_freq /= 1000000; /* Hz to MHz */
printf(", %u MHz", clock_freq);
}
iline = OF_getpropint(node, "i-cache-block-size", 128);
dline = OF_getpropint(node, "d-cache-block-size", 128);
level = 1;
while (node) {
const char *unit = "KB";
uint32_t isize, iways;
uint32_t dsize, dways;
uint32_t cache;
isize = OF_getpropint(node, "i-cache-size", 0) / 1024;
iways = OF_getpropint(node, "i-cache-sets", 0);
dsize = OF_getpropint(node, "d-cache-size", 0) / 1024;
dways = OF_getpropint(node, "d-cache-sets", 0);
/* Print large cache sizes in MB. */
if (isize > 4096 && dsize > 4096) {
unit = "MB";
isize /= 1024;
dsize /= 1024;
}
printf("\n%s:", dev->dv_xname);
if (OF_getproplen(node, "cache-unified") == 0) {
printf(" %d%s %db/line %d-way L%d cache",
isize, unit, iline, iways, level);
} else {
printf(" %d%s %db/line %d-way L%d I-cache",
isize, unit, iline, iways, level);
printf(", %d%s %db/line %d-way L%d D-cache",
dsize, unit, dline, dways, level);
}
cache = OF_getpropint(node, "l2-cache", 0);
node = OF_getnodebyphandle(cache);
level++;
}
printf("\n");
/* Update timebase frequency to reflect reality. */
tb_freq = OF_getpropint(faa->fa_node, "timebase-frequency", tb_freq);
}
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