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/*-
* Copyright (c) 2008 Marcel Moolenaar
* 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 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/smp.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/hid.h>
#include <machine/intr_machdep.h>
#include <machine/pcb.h>
#include <machine/psl.h>
#include <machine/smp.h>
#include <machine/spr.h>
#include <machine/trap_aim.h>
#include <dev/ofw/openfirm.h>
#include <machine/ofw_machdep.h>
void *ap_pcpu;
static register_t bsp_state[8] __aligned(8);
static void cpudep_save_config(void *dummy);
SYSINIT(cpu_save_config, SI_SUB_CPU, SI_ORDER_ANY, cpudep_save_config, NULL);
uintptr_t
cpudep_ap_bootstrap(void)
{
register_t msr, sp;
msr = PSL_KERNSET & ~PSL_EE;
mtmsr(msr);
isync();
__asm __volatile("mtsprg 0, %0" :: "r"(ap_pcpu));
powerpc_sync();
pcpup->pc_curthread = pcpup->pc_idlethread;
pcpup->pc_curpcb = pcpup->pc_curthread->td_pcb;
sp = pcpup->pc_curpcb->pcb_sp;
return (sp);
}
static register_t
mpc745x_l2_enable(register_t l2cr_config)
{
register_t ccr;
ccr = mfspr(SPR_L2CR);
if (ccr & L2CR_L2E)
return (ccr);
/* Configure L2 cache. */
ccr = l2cr_config & ~L2CR_L2E;
mtspr(SPR_L2CR, ccr | L2CR_L2I);
do {
ccr = mfspr(SPR_L2CR);
} while (ccr & L2CR_L2I);
powerpc_sync();
mtspr(SPR_L2CR, l2cr_config);
powerpc_sync();
return (l2cr_config);
}
static register_t
mpc745x_l3_enable(register_t l3cr_config)
{
register_t ccr;
ccr = mfspr(SPR_L3CR);
if (ccr & L3CR_L3E)
return (ccr);
/* Configure L3 cache. */
ccr = l3cr_config & ~(L3CR_L3E | L3CR_L3I | L3CR_L3PE | L3CR_L3CLKEN);
mtspr(SPR_L3CR, ccr);
ccr |= 0x4000000; /* Magic, but documented. */
mtspr(SPR_L3CR, ccr);
ccr |= L3CR_L3CLKEN;
mtspr(SPR_L3CR, ccr);
mtspr(SPR_L3CR, ccr | L3CR_L3I);
while (mfspr(SPR_L3CR) & L3CR_L3I)
;
mtspr(SPR_L3CR, ccr & ~L3CR_L3CLKEN);
powerpc_sync();
DELAY(100);
mtspr(SPR_L3CR, ccr);
powerpc_sync();
DELAY(100);
ccr |= L3CR_L3E;
mtspr(SPR_L3CR, ccr);
powerpc_sync();
return(ccr);
}
static register_t
mpc745x_l1d_enable(void)
{
register_t hid;
hid = mfspr(SPR_HID0);
if (hid & HID0_DCE)
return (hid);
/* Enable L1 D-cache */
hid |= HID0_DCE;
powerpc_sync();
mtspr(SPR_HID0, hid | HID0_DCFI);
powerpc_sync();
return (hid);
}
static register_t
mpc745x_l1i_enable(void)
{
register_t hid;
hid = mfspr(SPR_HID0);
if (hid & HID0_ICE)
return (hid);
/* Enable L1 I-cache */
hid |= HID0_ICE;
isync();
mtspr(SPR_HID0, hid | HID0_ICFI);
isync();
return (hid);
}
static void
cpudep_save_config(void *dummy)
{
uint16_t vers;
vers = mfpvr() >> 16;
switch(vers) {
case IBM970:
case IBM970FX:
case IBM970MP:
__asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
: "=r" (bsp_state[0]),"=r" (bsp_state[1]) : "K" (SPR_HID0));
__asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
: "=r" (bsp_state[2]),"=r" (bsp_state[3]) : "K" (SPR_HID1));
__asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
: "=r" (bsp_state[4]),"=r" (bsp_state[5]) : "K" (SPR_HID4));
__asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
: "=r" (bsp_state[6]),"=r" (bsp_state[7]) : "K" (SPR_HID5));
powerpc_sync();
break;
case MPC7450:
case MPC7455:
case MPC7457:
/* Only MPC745x CPUs have an L3 cache. */
bsp_state[3] = mfspr(SPR_L3CR);
/* Fallthrough */
case MPC7400:
case MPC7410:
case MPC7447A:
case MPC7448:
bsp_state[2] = mfspr(SPR_L2CR);
bsp_state[1] = mfspr(SPR_HID1);
bsp_state[0] = mfspr(SPR_HID0);
break;
}
}
void
cpudep_ap_setup()
{
register_t reg;
uint16_t vers;
vers = mfpvr() >> 16;
switch(vers) {
case IBM970:
case IBM970FX:
case IBM970MP:
/* Set HIOR to 0 */
__asm __volatile("mtspr 311,%0" :: "r"(0));
powerpc_sync();
/*
* The 970 has strange rules about how to update HID registers.
* See Table 2-3, 970MP manual
*/
__asm __volatile("mtasr %0; sync" :: "r"(0));
__asm __volatile(" \
ld %0,0(%2); \
sync; isync; \
mtspr %1, %0; \
mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
sync; isync"
: "=r"(reg) : "K"(SPR_HID0), "r"(bsp_state));
__asm __volatile("ld %0, 8(%2); sync; isync; \
mtspr %1, %0; mtspr %1, %0; sync; isync"
: "=r"(reg) : "K"(SPR_HID1), "r"(bsp_state));
__asm __volatile("ld %0, 16(%2); sync; isync; \
mtspr %1, %0; sync; isync;"
: "=r"(reg) : "K"(SPR_HID4), "r"(bsp_state));
__asm __volatile("ld %0, 24(%2); sync; isync; \
mtspr %1, %0; sync; isync;"
: "=r"(reg) : "K"(SPR_HID5), "r"(bsp_state));
powerpc_sync();
break;
case MPC7450:
case MPC7455:
case MPC7457:
/* Only MPC745x CPUs have an L3 cache. */
reg = mpc745x_l3_enable(bsp_state[3]);
/* Fallthrough */
case MPC7400:
case MPC7410:
case MPC7447A:
case MPC7448:
/* XXX: Program the CPU ID into PIR */
__asm __volatile("mtspr 1023,%0" :: "r"(PCPU_GET(cpuid)));
powerpc_sync();
isync();
mtspr(SPR_HID0, bsp_state[0]); isync();
mtspr(SPR_HID1, bsp_state[1]); isync();
reg = mpc745x_l2_enable(bsp_state[2]);
reg = mpc745x_l1d_enable();
reg = mpc745x_l1i_enable();
break;
default:
printf("WARNING: Unknown CPU type. Cache performace may be "
"suboptimal.\n");
break;
}
}
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