mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 02:59:26 +07:00
9d0aaf98dc
Move all IP27 declarations into one file. Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Paul Burton <paulburton@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org
188 lines
4.2 KiB
C
188 lines
4.2 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General
|
|
* Public License. See the file "COPYING" in the main directory of this
|
|
* archive for more details.
|
|
*
|
|
* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
|
|
* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/sched/task_stack.h>
|
|
#include <linux/topology.h>
|
|
#include <linux/nodemask.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/sn/agent.h>
|
|
#include <asm/sn/arch.h>
|
|
#include <asm/sn/gda.h>
|
|
#include <asm/sn/intr.h>
|
|
#include <asm/sn/klconfig.h>
|
|
#include <asm/sn/launch.h>
|
|
#include <asm/sn/mapped_kernel.h>
|
|
#include <asm/sn/types.h>
|
|
|
|
#include "ip27-common.h"
|
|
|
|
static int node_scan_cpus(nasid_t nasid, int highest)
|
|
{
|
|
static int cpus_found;
|
|
lboard_t *brd;
|
|
klcpu_t *acpu;
|
|
cpuid_t cpuid;
|
|
|
|
brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
|
|
|
|
do {
|
|
acpu = (klcpu_t *)find_first_component(brd, KLSTRUCT_CPU);
|
|
while (acpu) {
|
|
cpuid = acpu->cpu_info.virtid;
|
|
/* Only let it join in if it's marked enabled */
|
|
if ((acpu->cpu_info.flags & KLINFO_ENABLE) &&
|
|
(cpus_found != NR_CPUS)) {
|
|
if (cpuid > highest)
|
|
highest = cpuid;
|
|
set_cpu_possible(cpuid, true);
|
|
cputonasid(cpus_found) = nasid;
|
|
cputoslice(cpus_found) = acpu->cpu_info.physid;
|
|
cpus_found++;
|
|
}
|
|
acpu = (klcpu_t *)find_component(brd, (klinfo_t *)acpu,
|
|
KLSTRUCT_CPU);
|
|
}
|
|
brd = KLCF_NEXT(brd);
|
|
if (!brd)
|
|
break;
|
|
|
|
brd = find_lboard(brd, KLTYPE_IP27);
|
|
} while (brd);
|
|
|
|
return highest;
|
|
}
|
|
|
|
void cpu_node_probe(void)
|
|
{
|
|
int i, highest = 0;
|
|
gda_t *gdap = GDA;
|
|
|
|
nodes_clear(node_online_map);
|
|
for (i = 0; i < MAX_NUMNODES; i++) {
|
|
nasid_t nasid = gdap->g_nasidtable[i];
|
|
if (nasid == INVALID_NASID)
|
|
break;
|
|
node_set_online(nasid);
|
|
highest = node_scan_cpus(nasid, highest);
|
|
}
|
|
|
|
printk("Discovered %d cpus on %d nodes\n", highest + 1, num_online_nodes());
|
|
}
|
|
|
|
static __init void intr_clear_all(nasid_t nasid)
|
|
{
|
|
int i;
|
|
|
|
REMOTE_HUB_S(nasid, PI_INT_MASK0_A, 0);
|
|
REMOTE_HUB_S(nasid, PI_INT_MASK0_B, 0);
|
|
REMOTE_HUB_S(nasid, PI_INT_MASK1_A, 0);
|
|
REMOTE_HUB_S(nasid, PI_INT_MASK1_B, 0);
|
|
|
|
for (i = 0; i < 128; i++)
|
|
REMOTE_HUB_CLR_INTR(nasid, i);
|
|
}
|
|
|
|
static void ip27_send_ipi_single(int destid, unsigned int action)
|
|
{
|
|
int irq;
|
|
|
|
switch (action) {
|
|
case SMP_RESCHEDULE_YOURSELF:
|
|
irq = CPU_RESCHED_A_IRQ;
|
|
break;
|
|
case SMP_CALL_FUNCTION:
|
|
irq = CPU_CALL_A_IRQ;
|
|
break;
|
|
default:
|
|
panic("sendintr");
|
|
}
|
|
|
|
irq += cputoslice(destid);
|
|
|
|
/*
|
|
* Set the interrupt bit associated with the CPU we want to
|
|
* send the interrupt to.
|
|
*/
|
|
REMOTE_HUB_SEND_INTR(cpu_to_node(destid), irq);
|
|
}
|
|
|
|
static void ip27_send_ipi_mask(const struct cpumask *mask, unsigned int action)
|
|
{
|
|
unsigned int i;
|
|
|
|
for_each_cpu(i, mask)
|
|
ip27_send_ipi_single(i, action);
|
|
}
|
|
|
|
static void ip27_init_cpu(void)
|
|
{
|
|
per_cpu_init();
|
|
}
|
|
|
|
static void ip27_smp_finish(void)
|
|
{
|
|
hub_rt_clock_event_init();
|
|
local_irq_enable();
|
|
}
|
|
|
|
/*
|
|
* Launch a slave into smp_bootstrap(). It doesn't take an argument, and we
|
|
* set sp to the kernel stack of the newly created idle process, gp to the proc
|
|
* struct so that current_thread_info() will work.
|
|
*/
|
|
static int ip27_boot_secondary(int cpu, struct task_struct *idle)
|
|
{
|
|
unsigned long gp = (unsigned long)task_thread_info(idle);
|
|
unsigned long sp = __KSTK_TOS(idle);
|
|
|
|
LAUNCH_SLAVE(cputonasid(cpu), cputoslice(cpu),
|
|
(launch_proc_t)MAPPED_KERN_RW_TO_K0(smp_bootstrap),
|
|
0, (void *) sp, (void *) gp);
|
|
return 0;
|
|
}
|
|
|
|
static void __init ip27_smp_setup(void)
|
|
{
|
|
nasid_t nasid;
|
|
|
|
for_each_online_node(nasid) {
|
|
if (nasid == 0)
|
|
continue;
|
|
intr_clear_all(nasid);
|
|
}
|
|
|
|
replicate_kernel_text();
|
|
|
|
/*
|
|
* PROM sets up system, that boot cpu is always first CPU on nasid 0
|
|
*/
|
|
cputonasid(0) = 0;
|
|
cputoslice(0) = LOCAL_HUB_L(PI_CPU_NUM);
|
|
}
|
|
|
|
static void __init ip27_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
/* We already did everything necessary earlier */
|
|
}
|
|
|
|
const struct plat_smp_ops ip27_smp_ops = {
|
|
.send_ipi_single = ip27_send_ipi_single,
|
|
.send_ipi_mask = ip27_send_ipi_mask,
|
|
.init_secondary = ip27_init_cpu,
|
|
.smp_finish = ip27_smp_finish,
|
|
.boot_secondary = ip27_boot_secondary,
|
|
.smp_setup = ip27_smp_setup,
|
|
.prepare_cpus = ip27_prepare_cpus,
|
|
.prepare_boot_cpu = ip27_init_cpu,
|
|
};
|