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/*
* Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
* reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the NetLogic
* license below:
*
* 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 NETLOGIC ``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 NETLOGIC OR CONTRIBUTORS 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 <linux/init.h>
#include <linux/kernel.h>
#include <linux/threads.h>
#include <asm/asm.h>
#include <asm/asm-offsets.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/string.h>
#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/common.h>
#include <asm/netlogic/mips-extns.h>
#include <asm/netlogic/xlp-hal/iomap.h>
#include <asm/netlogic/xlp-hal/xlp.h>
#include <asm/netlogic/xlp-hal/pic.h>
#include <asm/netlogic/xlp-hal/sys.h>
static int xlp_wakeup_core(uint64_t sysbase, int node, int core)
{
uint32_t coremask, value;
int count, resetreg;
coremask = (1 << core);
/* Enable CPU clock in case of 8xx/3xx */
if (!cpu_is_xlpii()) {
value = nlm_read_sys_reg(sysbase, SYS_CORE_DFS_DIS_CTRL);
value &= ~coremask;
nlm_write_sys_reg(sysbase, SYS_CORE_DFS_DIS_CTRL, value);
}
/* On 9XX, mark coherent first */
if (cpu_is_xlp9xx()) {
value = nlm_read_sys_reg(sysbase, SYS_9XX_CPU_NONCOHERENT_MODE);
value &= ~coremask;
nlm_write_sys_reg(sysbase, SYS_9XX_CPU_NONCOHERENT_MODE, value);
}
/* Remove CPU Reset */
resetreg = cpu_is_xlp9xx() ? SYS_9XX_CPU_RESET : SYS_CPU_RESET;
value = nlm_read_sys_reg(sysbase, resetreg);
value &= ~coremask;
nlm_write_sys_reg(sysbase, resetreg, value);
/* We are done on 9XX */
if (cpu_is_xlp9xx())
return 1;
/* Poll for CPU to mark itself coherent on other type of XLP */
count = 100000;
do {
value = nlm_read_sys_reg(sysbase, SYS_CPU_NONCOHERENT_MODE);
} while ((value & coremask) != 0 && --count > 0);
return count != 0;
}
static int wait_for_cpus(int cpu, int bootcpu)
{
volatile uint32_t *cpu_ready = nlm_get_boot_data(BOOT_CPU_READY);
int i, count, notready;
count = 0x800000;
do {
notready = nlm_threads_per_core;
for (i = 0; i < nlm_threads_per_core; i++)
if (cpu_ready[cpu + i] || cpu == bootcpu)
--notready;
} while (notready != 0 && --count > 0);
return count != 0;
}
static void xlp_enable_secondary_cores(const cpumask_t *wakeup_mask)
{
struct nlm_soc_info *nodep;
uint64_t syspcibase, fusebase;
uint32_t syscoremask, mask, fusemask;
int core, n, cpu;
for (n = 0; n < NLM_NR_NODES; n++) {
if (n != 0) {
/* check if node exists and is online */
if (cpu_is_xlp9xx()) {
int b = xlp9xx_get_socbus(n);
pr_info("Node %d SoC PCI bus %d.\n", n, b);
if (b == 0)
break;
} else {
syspcibase = nlm_get_sys_pcibase(n);
if (nlm_read_reg(syspcibase, 0) == 0xffffffff)
break;
}
nlm_node_init(n);
}
/* read cores in reset from SYS */
nodep = nlm_get_node(n);
if (cpu_is_xlp9xx()) {
fusebase = nlm_get_fuse_regbase(n);
fusemask = nlm_read_reg(fusebase, FUSE_9XX_DEVCFG6);
mask = 0xfffff;
} else {
fusemask = nlm_read_sys_reg(nodep->sysbase,
SYS_EFUSE_DEVICE_CFG_STATUS0);
switch (read_c0_prid() & 0xff00) {
case PRID_IMP_NETLOGIC_XLP3XX:
mask = 0xf;
break;
case PRID_IMP_NETLOGIC_XLP2XX:
mask = 0x3;
break;
case PRID_IMP_NETLOGIC_XLP8XX:
default:
mask = 0xff;
break;
}
}
/*
* Fused out cores are set in the fusemask, and the remaining
* cores are renumbered to range 0 .. nactive-1
*/
syscoremask = (1 << hweight32(~fusemask & mask)) - 1;
/* The boot cpu */
if (n == 0)
nodep->coremask = 1;
pr_info("Node %d - SYS/FUSE coremask %x\n", n, syscoremask);
for (core = 0; core < nlm_cores_per_node(); core++) {
/* we will be on node 0 core 0 */
if (n == 0 && core == 0)
continue;
/* see if the core exists */
if ((syscoremask & (1 << core)) == 0)
continue;
/* see if at least the first hw thread is enabled */
cpu = (n * nlm_cores_per_node() + core)
* NLM_THREADS_PER_CORE;
if (!cpumask_test_cpu(cpu, wakeup_mask))
continue;
/* wake up the core */
if (!xlp_wakeup_core(nodep->sysbase, n, core))
continue;
/* core is up */
nodep->coremask |= 1u << core;
/* spin until the hw threads sets their ready */
if (!wait_for_cpus(cpu, 0))
pr_err("Node %d : timeout core %d\n", n, core);
}
}
}
void xlp_wakeup_secondary_cpus()
{
/*
* In case of u-boot, the secondaries are in reset
* first wakeup core 0 threads
*/
xlp_boot_core0_siblings();
if (!wait_for_cpus(0, 0))
pr_err("Node 0 : timeout core 0\n");
/* now get other cores out of reset */
xlp_enable_secondary_cores(&nlm_cpumask);
}
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