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| Current File : //usr/src/sys/powerpc/powerpc/cpu.c |
/*-
* Copyright (c) 2001 Matt Thomas.
* Copyright (c) 2001 Tsubai Masanari.
* Copyright (c) 1998, 1999, 2001 Internet Research Institute, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* Internet Research Institute, Inc.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (C) 2003 Benno Rice.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* from $NetBSD: cpu_subr.c,v 1.1 2003/02/03 17:10:09 matt Exp $
* $FreeBSD: release/9.1.0/sys/powerpc/powerpc/cpu.c 225963 2011-10-04 10:02:14Z mav $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/cpu.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/hid.h>
#include <machine/md_var.h>
#include <machine/smp.h>
#include <machine/spr.h>
static void cpu_6xx_setup(int cpuid, uint16_t vers);
static void cpu_e500_setup(int cpuid, uint16_t vers);
static void cpu_970_setup(int cpuid, uint16_t vers);
int powerpc_pow_enabled;
void (*cpu_idle_hook)(void) = NULL;
static void cpu_idle_60x(void);
static void cpu_idle_e500(void);
struct cputab {
const char *name;
uint16_t version;
uint16_t revfmt;
int features; /* Do not include PPC_FEATURE_32 or
* PPC_FEATURE_HAS_MMU */
void (*cpu_setup)(int cpuid, uint16_t vers);
};
#define REVFMT_MAJMIN 1 /* %u.%u */
#define REVFMT_HEX 2 /* 0x%04x */
#define REVFMT_DEC 3 /* %u */
static const struct cputab models[] = {
{ "Motorola PowerPC 601", MPC601, REVFMT_DEC,
PPC_FEATURE_HAS_FPU | PPC_FEATURE_UNIFIED_CACHE, cpu_6xx_setup },
{ "Motorola PowerPC 602", MPC602, REVFMT_DEC,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 603", MPC603, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 603e", MPC603e, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 603ev", MPC603ev, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 604", MPC604, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 604ev", MPC604ev, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 620", MPC620, REVFMT_HEX,
PPC_FEATURE_64 | PPC_FEATURE_HAS_FPU, NULL },
{ "Motorola PowerPC 750", MPC750, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "IBM PowerPC 750FX", IBM750FX, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "IBM PowerPC 970", IBM970, REVFMT_MAJMIN,
PPC_FEATURE_64 | PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU,
cpu_970_setup },
{ "IBM PowerPC 970FX", IBM970FX, REVFMT_MAJMIN,
PPC_FEATURE_64 | PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU,
cpu_970_setup },
{ "IBM PowerPC 970GX", IBM970GX, REVFMT_MAJMIN,
PPC_FEATURE_64 | PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU,
cpu_970_setup },
{ "IBM PowerPC 970MP", IBM970MP, REVFMT_MAJMIN,
PPC_FEATURE_64 | PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU,
cpu_970_setup },
{ "Motorola PowerPC 7400", MPC7400, REVFMT_MAJMIN,
PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 7410", MPC7410, REVFMT_MAJMIN,
PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 7450", MPC7450, REVFMT_MAJMIN,
PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 7455", MPC7455, REVFMT_MAJMIN,
PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 7457", MPC7457, REVFMT_MAJMIN,
PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 7447A", MPC7447A, REVFMT_MAJMIN,
PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 7448", MPC7448, REVFMT_MAJMIN,
PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 8240", MPC8240, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Motorola PowerPC 8245", MPC8245, REVFMT_MAJMIN,
PPC_FEATURE_HAS_FPU, cpu_6xx_setup },
{ "Freescale e500v1 core", FSL_E500v1, REVFMT_MAJMIN,
0, cpu_e500_setup },
{ "Freescale e500v2 core", FSL_E500v2, REVFMT_MAJMIN,
0, cpu_e500_setup },
{ "IBM Cell Broadband Engine", IBMCELLBE, REVFMT_MAJMIN,
PPC_FEATURE_64 | PPC_FEATURE_HAS_ALTIVEC | PPC_FEATURE_HAS_FPU,
NULL},
{ "Unknown PowerPC CPU", 0, REVFMT_HEX, 0, NULL },
};
static void cpu_6xx_print_cacheinfo(u_int, uint16_t);
static int cpu_feature_bit(SYSCTL_HANDLER_ARGS);
static char model[64];
SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, "");
int cpu_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU;
SYSCTL_OPAQUE(_hw, OID_AUTO, cpu_features, CTLTYPE_INT | CTLFLAG_RD,
&cpu_features, sizeof(cpu_features), "IX", "PowerPC CPU features");
/* Provide some user-friendly aliases for bits in cpu_features */
SYSCTL_PROC(_hw, OID_AUTO, floatingpoint, CTLTYPE_INT | CTLFLAG_RD,
0, PPC_FEATURE_HAS_FPU, cpu_feature_bit, "I",
"Floating point instructions executed in hardware");
SYSCTL_PROC(_hw, OID_AUTO, altivec, CTLTYPE_INT | CTLFLAG_RD,
0, PPC_FEATURE_HAS_ALTIVEC, cpu_feature_bit, "I", "CPU supports Altivec");
void
cpu_setup(u_int cpuid)
{
u_int pvr, maj, min;
uint16_t vers, rev, revfmt;
uint64_t cps;
const struct cputab *cp;
const char *name;
pvr = mfpvr();
vers = pvr >> 16;
rev = pvr;
switch (vers) {
case MPC7410:
min = (pvr >> 0) & 0xff;
maj = min <= 4 ? 1 : 2;
break;
case FSL_E500v1:
case FSL_E500v2:
maj = (pvr >> 4) & 0xf;
min = (pvr >> 0) & 0xf;
break;
default:
maj = (pvr >> 8) & 0xf;
min = (pvr >> 0) & 0xf;
}
for (cp = models; cp->version != 0; cp++) {
if (cp->version == vers)
break;
}
revfmt = cp->revfmt;
name = cp->name;
if (rev == MPC750 && pvr == 15) {
name = "Motorola MPC755";
revfmt = REVFMT_HEX;
}
strncpy(model, name, sizeof(model) - 1);
printf("cpu%d: %s revision ", cpuid, name);
switch (revfmt) {
case REVFMT_MAJMIN:
printf("%u.%u", maj, min);
break;
case REVFMT_HEX:
printf("0x%04x", rev);
break;
case REVFMT_DEC:
printf("%u", rev);
break;
}
if (cpu_est_clockrate(0, &cps) == 0)
printf(", %jd.%02jd MHz", cps / 1000000, (cps / 10000) % 100);
printf("\n");
cpu_features |= cp->features;
printf("cpu%d: Features %b\n", cpuid, cpu_features,
PPC_FEATURE_BITMASK);
/*
* Configure CPU
*/
if (cp->cpu_setup != NULL)
cp->cpu_setup(cpuid, vers);
}
/* Get current clock frequency for the given cpu id. */
int
cpu_est_clockrate(int cpu_id, uint64_t *cps)
{
uint16_t vers;
register_t msr;
vers = mfpvr() >> 16;
msr = mfmsr();
mtmsr(msr & ~PSL_EE);
switch (vers) {
case MPC7450:
case MPC7455:
case MPC7457:
case MPC750:
case IBM750FX:
case MPC7400:
case MPC7410:
case MPC7447A:
case MPC7448:
mtspr(SPR_MMCR0, SPR_MMCR0_FC);
mtspr(SPR_PMC1, 0);
mtspr(SPR_MMCR0, SPR_MMCR0_PMC1SEL(PMCN_CYCLES));
DELAY(1000);
*cps = (mfspr(SPR_PMC1) * 1000) + 4999;
mtspr(SPR_MMCR0, SPR_MMCR0_FC);
mtmsr(msr);
return (0);
case IBM970:
case IBM970FX:
case IBM970MP:
isync();
mtspr(SPR_970MMCR0, SPR_MMCR0_FC);
isync();
mtspr(SPR_970MMCR1, 0);
mtspr(SPR_970MMCRA, 0);
mtspr(SPR_970PMC1, 0);
mtspr(SPR_970MMCR0,
SPR_970MMCR0_PMC1SEL(PMC970N_CYCLES));
isync();
DELAY(1000);
powerpc_sync();
mtspr(SPR_970MMCR0, SPR_MMCR0_FC);
*cps = (mfspr(SPR_970PMC1) * 1000) + 4999;
mtmsr(msr);
return (0);
}
return (ENXIO);
}
void
cpu_6xx_setup(int cpuid, uint16_t vers)
{
register_t hid0, pvr;
const char *bitmask;
hid0 = mfspr(SPR_HID0);
pvr = mfpvr();
/*
* Configure power-saving mode.
*/
switch (vers) {
case MPC603:
case MPC603e:
case MPC603ev:
case MPC604ev:
case MPC750:
case IBM750FX:
case MPC7400:
case MPC7410:
case MPC8240:
case MPC8245:
/* Select DOZE mode. */
hid0 &= ~(HID0_DOZE | HID0_NAP | HID0_SLEEP);
hid0 |= HID0_DOZE | HID0_DPM;
powerpc_pow_enabled = 1;
break;
case MPC7448:
case MPC7447A:
case MPC7457:
case MPC7455:
case MPC7450:
/* Enable the 7450 branch caches */
hid0 |= HID0_SGE | HID0_BTIC;
hid0 |= HID0_LRSTK | HID0_FOLD | HID0_BHT;
/* Disable BTIC on 7450 Rev 2.0 or earlier and on 7457 */
if (((pvr >> 16) == MPC7450 && (pvr & 0xFFFF) <= 0x0200)
|| (pvr >> 16) == MPC7457)
hid0 &= ~HID0_BTIC;
/* Select NAP mode. */
hid0 &= ~(HID0_DOZE | HID0_NAP | HID0_SLEEP);
hid0 |= HID0_NAP | HID0_DPM;
powerpc_pow_enabled = 1;
break;
default:
/* No power-saving mode is available. */ ;
}
switch (vers) {
case IBM750FX:
case MPC750:
hid0 &= ~HID0_DBP; /* XXX correct? */
hid0 |= HID0_EMCP | HID0_BTIC | HID0_SGE | HID0_BHT;
break;
case MPC7400:
case MPC7410:
hid0 &= ~HID0_SPD;
hid0 |= HID0_EMCP | HID0_BTIC | HID0_SGE | HID0_BHT;
hid0 |= HID0_EIEC;
break;
}
mtspr(SPR_HID0, hid0);
if (bootverbose)
cpu_6xx_print_cacheinfo(cpuid, vers);
switch (vers) {
case MPC7447A:
case MPC7448:
case MPC7450:
case MPC7455:
case MPC7457:
bitmask = HID0_7450_BITMASK;
break;
default:
bitmask = HID0_BITMASK;
break;
}
printf("cpu%d: HID0 %b\n", cpuid, (int)hid0, bitmask);
if (cpu_idle_hook == NULL)
cpu_idle_hook = cpu_idle_60x;
}
static void
cpu_6xx_print_cacheinfo(u_int cpuid, uint16_t vers)
{
register_t hid;
hid = mfspr(SPR_HID0);
printf("cpu%u: ", cpuid);
printf("L1 I-cache %sabled, ", (hid & HID0_ICE) ? "en" : "dis");
printf("L1 D-cache %sabled\n", (hid & HID0_DCE) ? "en" : "dis");
printf("cpu%u: ", cpuid);
if (mfspr(SPR_L2CR) & L2CR_L2E) {
switch (vers) {
case MPC7450:
case MPC7455:
case MPC7457:
printf("256KB L2 cache, ");
if (mfspr(SPR_L3CR) & L3CR_L3E)
printf("%cMB L3 backside cache",
mfspr(SPR_L3CR) & L3CR_L3SIZ ? '2' : '1');
else
printf("L3 cache disabled");
printf("\n");
break;
case IBM750FX:
printf("512KB L2 cache\n");
break;
default:
switch (mfspr(SPR_L2CR) & L2CR_L2SIZ) {
case L2SIZ_256K:
printf("256KB ");
break;
case L2SIZ_512K:
printf("512KB ");
break;
case L2SIZ_1M:
printf("1MB ");
break;
}
printf("write-%s", (mfspr(SPR_L2CR) & L2CR_L2WT)
? "through" : "back");
if (mfspr(SPR_L2CR) & L2CR_L2PE)
printf(", with parity");
printf(" backside cache\n");
break;
}
} else
printf("L2 cache disabled\n");
}
static void
cpu_e500_setup(int cpuid, uint16_t vers)
{
register_t hid0;
hid0 = mfspr(SPR_HID0);
/* Programe power-management mode. */
hid0 &= ~(HID0_DOZE | HID0_NAP | HID0_SLEEP);
hid0 |= HID0_DOZE;
mtspr(SPR_HID0, hid0);
printf("cpu%d: HID0 %b\n", cpuid, (int)hid0, HID0_E500_BITMASK);
if (cpu_idle_hook == NULL)
cpu_idle_hook = cpu_idle_e500;
}
static void
cpu_970_setup(int cpuid, uint16_t vers)
{
#ifdef AIM
uint32_t hid0_hi, hid0_lo;
__asm __volatile ("mfspr %0,%2; clrldi %1,%0,32; srdi %0,%0,32;"
: "=r" (hid0_hi), "=r" (hid0_lo) : "K" (SPR_HID0));
/* Configure power-saving mode */
switch (vers) {
case IBM970MP:
hid0_hi |= (HID0_DEEPNAP | HID0_NAP | HID0_DPM);
hid0_hi &= ~HID0_DOZE;
break;
default:
hid0_hi |= (HID0_NAP | HID0_DPM);
hid0_hi &= ~(HID0_DOZE | HID0_DEEPNAP);
break;
}
powerpc_pow_enabled = 1;
__asm __volatile (" \
sync; isync; \
sldi %0,%0,32; or %0,%0,%1; \
mtspr %2, %0; \
mfspr %0, %2; mfspr %0, %2; mfspr %0, %2; \
mfspr %0, %2; mfspr %0, %2; mfspr %0, %2; \
sync; isync"
:: "r" (hid0_hi), "r"(hid0_lo), "K" (SPR_HID0));
__asm __volatile ("mfspr %0,%1; srdi %0,%0,32;"
: "=r" (hid0_hi) : "K" (SPR_HID0));
printf("cpu%d: HID0 %b\n", cpuid, (int)(hid0_hi), HID0_970_BITMASK);
#endif
cpu_idle_hook = cpu_idle_60x;
}
static int
cpu_feature_bit(SYSCTL_HANDLER_ARGS)
{
int result;
result = (cpu_features & arg2) ? 1 : 0;
return (sysctl_handle_int(oidp, &result, 0, req));
}
void
cpu_idle(int busy)
{
#ifdef INVARIANTS
if ((mfmsr() & PSL_EE) != PSL_EE) {
struct thread *td = curthread;
printf("td msr %#lx\n", (u_long)td->td_md.md_saved_msr);
panic("ints disabled in idleproc!");
}
#endif
CTR2(KTR_SPARE2, "cpu_idle(%d) at %d",
busy, curcpu);
if (cpu_idle_hook != NULL) {
if (!busy) {
critical_enter();
cpu_idleclock();
}
cpu_idle_hook();
if (!busy) {
cpu_activeclock();
critical_exit();
}
}
CTR2(KTR_SPARE2, "cpu_idle(%d) at %d done",
busy, curcpu);
}
int
cpu_idle_wakeup(int cpu)
{
return (0);
}
static void
cpu_idle_60x(void)
{
register_t msr;
uint16_t vers;
if (!powerpc_pow_enabled)
return;
msr = mfmsr();
vers = mfpvr() >> 16;
#ifdef AIM
switch (vers) {
case IBM970:
case IBM970FX:
case IBM970MP:
case MPC7447A:
case MPC7448:
case MPC7450:
case MPC7455:
case MPC7457:
__asm __volatile("\
dssall; sync; mtmsr %0; isync"
:: "r"(msr | PSL_POW));
break;
default:
powerpc_sync();
mtmsr(msr | PSL_POW);
isync();
break;
}
#endif
}
static void
cpu_idle_e500(void)
{
register_t msr;
msr = mfmsr();
#ifdef E500
/* Freescale E500 core RM section 6.4.1. */
__asm __volatile("msync; mtmsr %0; isync" ::
"r" (msr | PSL_WE));
#endif
}