[PATCH v1 08/13] sparc32: Drop sun4d/sun4m smp support

From: Sam Ravnborg
Date: Fri Dec 18 2020 - 13:46:04 EST

Drop the sun4m and sun4d smp support code.

The sparc32 kernel will not boot unless this is a LEON system,
so drop checks for other systems as they will not trigger.

Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Christian Brauner <christian.brauner@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
---
arch/sparc/kernel/Makefile | 2 +-
arch/sparc/kernel/smp_32.c | 102 +--------
arch/sparc/kernel/sun4d_smp.c | 410 ----------------------------------
arch/sparc/kernel/sun4m_smp.c | 273 ----------------------
arch/sparc/mm/srmmu.c | 10 +-
5 files changed, 8 insertions(+), 789 deletions(-)
delete mode 100644 arch/sparc/kernel/sun4d_smp.c
delete mode 100644 arch/sparc/kernel/sun4m_smp.c

diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index 92a9fdbba0a5..5ddc11cfd84a 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -81,7 +81,7 @@ obj-$(CONFIG_SPARC_GRPCI2)+= leon_pci_grpci2.o
obj-$(CONFIG_SPARC_GRPCI1)+= leon_pci_grpci1.o

obj-$(CONFIG_SMP) += trampoline_$(BITS).o smp_$(BITS).o
-obj-$(CONFIG_SPARC32_SMP) += sun4m_smp.o sun4d_smp.o leon_smp.o
+obj-$(CONFIG_SPARC32_SMP) += leon_smp.o
obj-$(CONFIG_SPARC64_SMP) += hvtramp.o

obj-$(CONFIG_SPARC64) += auxio_64.o
diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c
index 50c127ab46d5..bcda7e469da9 100644
--- a/arch/sparc/kernel/smp_32.c
+++ b/arch/sparc/kernel/smp_32.c
@@ -87,29 +87,7 @@ void __init smp_cpus_done(unsigned int max_cpus)
num, bogosum/(500000/HZ),
(bogosum/(5000/HZ))%100);

- switch(sparc_cpu_model) {
- case sun4m:
- smp4m_smp_done();
- break;
- case sun4d:
- smp4d_smp_done();
- break;
- case sparc_leon:
- leon_smp_done();
- break;
- case sun4e:
- printk("SUN4E\n");
- BUG();
- break;
- case sun4u:
- printk("SUN4U\n");
- BUG();
- break;
- default:
- printk("UNKNOWN!\n");
- BUG();
- break;
- }
+ leon_smp_done();
}

void cpu_panic(void)
@@ -196,29 +174,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)

smp_store_cpu_info(boot_cpu_id);

- switch(sparc_cpu_model) {
- case sun4m:
- smp4m_boot_cpus();
- break;
- case sun4d:
- smp4d_boot_cpus();
- break;
- case sparc_leon:
- leon_boot_cpus();
- break;
- case sun4e:
- printk("SUN4E\n");
- BUG();
- break;
- case sun4u:
- printk("SUN4U\n");
- BUG();
- break;
- default:
- printk("UNKNOWN!\n");
- BUG();
- break;
- }
+ leon_boot_cpus();
}

/* Set this up early so that things like the scheduler can init
@@ -257,31 +213,7 @@ void __init smp_prepare_boot_cpu(void)

int __cpu_up(unsigned int cpu, struct task_struct *tidle)
{
- int ret=0;
-
- switch(sparc_cpu_model) {
- case sun4m:
- ret = smp4m_boot_one_cpu(cpu, tidle);
- break;
- case sun4d:
- ret = smp4d_boot_one_cpu(cpu, tidle);
- break;
- case sparc_leon:
- ret = leon_boot_one_cpu(cpu, tidle);
- break;
- case sun4e:
- printk("SUN4E\n");
- BUG();
- break;
- case sun4u:
- printk("SUN4U\n");
- BUG();
- break;
- default:
- printk("UNKNOWN!\n");
- BUG();
- break;
- }
+ int ret = leon_boot_one_cpu(cpu, tidle);

if (!ret) {
cpumask_set_cpu(cpu, &smp_commenced_mask);
@@ -296,19 +228,7 @@ static void arch_cpu_pre_starting(void *arg)
local_ops->cache_all();
local_ops->tlb_all();

- switch(sparc_cpu_model) {
- case sun4m:
- sun4m_cpu_pre_starting(arg);
- break;
- case sun4d:
- sun4d_cpu_pre_starting(arg);
- break;
- case sparc_leon:
- leon_cpu_pre_starting(arg);
- break;
- default:
- BUG();
- }
+ leon_cpu_pre_starting(arg);
}

static void arch_cpu_pre_online(void *arg)
@@ -323,19 +243,7 @@ static void arch_cpu_pre_online(void *arg)
local_ops->cache_all();
local_ops->tlb_all();

- switch(sparc_cpu_model) {
- case sun4m:
- sun4m_cpu_pre_online(arg);
- break;
- case sun4d:
- sun4d_cpu_pre_online(arg);
- break;
- case sparc_leon:
- leon_cpu_pre_online(arg);
- break;
- default:
- BUG();
- }
+ leon_cpu_pre_online(arg);
}

static void sparc_start_secondary(void *arg)
diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c
deleted file mode 100644
index cecdda746baa..000000000000
--- a/arch/sparc/kernel/sun4d_smp.c
+++ /dev/null
@@ -1,410 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Sparc SS1000/SC2000 SMP support.
- *
- * Copyright (C) 1998 Jakub Jelinek (jj@xxxxxxxxxxxxxxxxxxx)
- *
- * Based on sun4m's smp.c, which is:
- * Copyright (C) 1996 David S. Miller (davem@xxxxxxxxxxxxxxxx)
- */
-
-#include <linux/clockchips.h>
-#include <linux/interrupt.h>
-#include <linux/profile.h>
-#include <linux/delay.h>
-#include <linux/sched/mm.h>
-#include <linux/cpu.h>
-
-#include <asm/cacheflush.h>
-#include <asm/switch_to.h>
-#include <asm/tlbflush.h>
-#include <asm/timer.h>
-#include <asm/oplib.h>
-#include <asm/sbi.h>
-#include <asm/mmu.h>
-
-#include "kernel.h"
-#include "irq.h"
-
-#define IRQ_CROSS_CALL 15
-
-static volatile int smp_processors_ready;
-static int smp_highest_cpu;
-
-static inline unsigned long sun4d_swap(volatile unsigned long *ptr, unsigned long val)
-{
- __asm__ __volatile__("swap [%1], %0\n\t" :
- "=&r" (val), "=&r" (ptr) :
- "0" (val), "1" (ptr));
- return val;
-}
-
-static void smp4d_ipi_init(void);
-
-static unsigned char cpu_leds[32];
-
-static inline void show_leds(int cpuid)
-{
- cpuid &= 0x1e;
- __asm__ __volatile__ ("stba %0, [%1] %2" : :
- "r" ((cpu_leds[cpuid] << 4) | cpu_leds[cpuid+1]),
- "r" (ECSR_BASE(cpuid) | BB_LEDS),
- "i" (ASI_M_CTL));
-}
-
-void sun4d_cpu_pre_starting(void *arg)
-{
- int cpuid = hard_smp_processor_id();
-
- /* Show we are alive */
- cpu_leds[cpuid] = 0x6;
- show_leds(cpuid);
-
- /* Enable level15 interrupt, disable level14 interrupt for now */
- cc_set_imsk((cc_get_imsk() & ~0x8000) | 0x4000);
-}
-
-void sun4d_cpu_pre_online(void *arg)
-{
- unsigned long flags;
- int cpuid;
-
- cpuid = hard_smp_processor_id();
-
- /* Unblock the master CPU _only_ when the scheduler state
- * of all secondary CPUs will be up-to-date, so after
- * the SMP initialization the master will be just allowed
- * to call the scheduler code.
- */
- sun4d_swap((unsigned long *)&cpu_callin_map[cpuid], 1);
- local_ops->cache_all();
- local_ops->tlb_all();
-
- while ((unsigned long)current_set[cpuid] < PAGE_OFFSET)
- barrier();
-
- while (current_set[cpuid]->cpu != cpuid)
- barrier();
-
- /* Fix idle thread fields. */
- __asm__ __volatile__("ld [%0], %%g6\n\t"
- : : "r" (&current_set[cpuid])
- : "memory" /* paranoid */);
-
- cpu_leds[cpuid] = 0x9;
- show_leds(cpuid);
-
- /* Attach to the address space of init_task. */
- mmgrab(&init_mm);
- current->active_mm = &init_mm;
-
- local_ops->cache_all();
- local_ops->tlb_all();
-
- while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
- barrier();
-
- spin_lock_irqsave(&sun4d_imsk_lock, flags);
- cc_set_imsk(cc_get_imsk() & ~0x4000); /* Allow PIL 14 as well */
- spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
-}
-
-/*
- * Cycle through the processors asking the PROM to start each one.
- */
-void __init smp4d_boot_cpus(void)
-{
- smp4d_ipi_init();
- if (boot_cpu_id)
- current_set[0] = NULL;
- local_ops->cache_all();
-}
-
-int smp4d_boot_one_cpu(int i, struct task_struct *idle)
-{
- unsigned long *entry = &sun4d_cpu_startup;
- int timeout;
- int cpu_node;
-
- cpu_find_by_instance(i, &cpu_node, NULL);
- current_set[i] = task_thread_info(idle);
- /*
- * Initialize the contexts table
- * Since the call to prom_startcpu() trashes the structure,
- * we need to re-initialize it for each cpu
- */
- smp_penguin_ctable.which_io = 0;
- smp_penguin_ctable.phys_addr = (unsigned int) srmmu_ctx_table_phys;
- smp_penguin_ctable.reg_size = 0;
-
- /* whirrr, whirrr, whirrrrrrrrr... */
- printk(KERN_INFO "Starting CPU %d at %p\n", i, entry);
- local_ops->cache_all();
- prom_startcpu(cpu_node,
- &smp_penguin_ctable, 0, (char *)entry);
-
- printk(KERN_INFO "prom_startcpu returned :)\n");
-
- /* wheee... it's going... */
- for (timeout = 0; timeout < 10000; timeout++) {
- if (cpu_callin_map[i])
- break;
- udelay(200);
- }
-
- if (!(cpu_callin_map[i])) {
- printk(KERN_ERR "Processor %d is stuck.\n", i);
- return -ENODEV;
-
- }
- local_ops->cache_all();
- return 0;
-}
-
-void __init smp4d_smp_done(void)
-{
- int i, first;
- int *prev;
-
- /* setup cpu list for irq rotation */
- first = 0;
- prev = &first;
- for_each_online_cpu(i) {
- *prev = i;
- prev = &cpu_data(i).next;
- }
- *prev = first;
- local_ops->cache_all();
-
- /* Ok, they are spinning and ready to go. */
- smp_processors_ready = 1;
- sun4d_distribute_irqs();
-}
-
-/* Memory structure giving interrupt handler information about IPI generated */
-struct sun4d_ipi_work {
- int single;
- int msk;
- int resched;
-};
-
-static DEFINE_PER_CPU_SHARED_ALIGNED(struct sun4d_ipi_work, sun4d_ipi_work);
-
-/* Initialize IPIs on the SUN4D SMP machine */
-static void __init smp4d_ipi_init(void)
-{
- int cpu;
- struct sun4d_ipi_work *work;
-
- printk(KERN_INFO "smp4d: setup IPI at IRQ %d\n", SUN4D_IPI_IRQ);
-
- for_each_possible_cpu(cpu) {
- work = &per_cpu(sun4d_ipi_work, cpu);
- work->single = work->msk = work->resched = 0;
- }
-}
-
-void sun4d_ipi_interrupt(void)
-{
- struct sun4d_ipi_work *work = this_cpu_ptr(&sun4d_ipi_work);
-
- if (work->single) {
- work->single = 0;
- smp_call_function_single_interrupt();
- }
- if (work->msk) {
- work->msk = 0;
- smp_call_function_interrupt();
- }
- if (work->resched) {
- work->resched = 0;
- smp_resched_interrupt();
- }
-}
-
-/* +-------+-------------+-----------+------------------------------------+
- * | bcast | devid | sid | levels mask |
- * +-------+-------------+-----------+------------------------------------+
- * 31 30 23 22 15 14 0
- */
-#define IGEN_MESSAGE(bcast, devid, sid, levels) \
- (((bcast) << 31) | ((devid) << 23) | ((sid) << 15) | (levels))
-
-static void sun4d_send_ipi(int cpu, int level)
-{
- cc_set_igen(IGEN_MESSAGE(0, cpu << 3, 6 + ((level >> 1) & 7), 1 << (level - 1)));
-}
-
-static void sun4d_ipi_single(int cpu)
-{
- struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
-
- /* Mark work */
- work->single = 1;
-
- /* Generate IRQ on the CPU */
- sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
-}
-
-static void sun4d_ipi_mask_one(int cpu)
-{
- struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
-
- /* Mark work */
- work->msk = 1;
-
- /* Generate IRQ on the CPU */
- sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
-}
-
-static void sun4d_ipi_resched(int cpu)
-{
- struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
-
- /* Mark work */
- work->resched = 1;
-
- /* Generate IRQ on the CPU (any IRQ will cause resched) */
- sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
-}
-
-static struct smp_funcall {
- smpfunc_t func;
- unsigned long arg1;
- unsigned long arg2;
- unsigned long arg3;
- unsigned long arg4;
- unsigned long arg5;
- unsigned char processors_in[NR_CPUS]; /* Set when ipi entered. */
- unsigned char processors_out[NR_CPUS]; /* Set when ipi exited. */
-} ccall_info __attribute__((aligned(8)));
-
-static DEFINE_SPINLOCK(cross_call_lock);
-
-/* Cross calls must be serialized, at least currently. */
-static void sun4d_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
- unsigned long arg2, unsigned long arg3,
- unsigned long arg4)
-{
- if (smp_processors_ready) {
- register int high = smp_highest_cpu;
- unsigned long flags;
-
- spin_lock_irqsave(&cross_call_lock, flags);
-
- {
- /*
- * If you make changes here, make sure
- * gcc generates proper code...
- */
- register smpfunc_t f asm("i0") = func;
- register unsigned long a1 asm("i1") = arg1;
- register unsigned long a2 asm("i2") = arg2;
- register unsigned long a3 asm("i3") = arg3;
- register unsigned long a4 asm("i4") = arg4;
- register unsigned long a5 asm("i5") = 0;
-
- __asm__ __volatile__(
- "std %0, [%6]\n\t"
- "std %2, [%6 + 8]\n\t"
- "std %4, [%6 + 16]\n\t" : :
- "r"(f), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5),
- "r" (&ccall_info.func));
- }
-
- /* Init receive/complete mapping, plus fire the IPI's off. */
- {
- register int i;
-
- cpumask_clear_cpu(smp_processor_id(), &mask);
- cpumask_and(&mask, cpu_online_mask, &mask);
- for (i = 0; i <= high; i++) {
- if (cpumask_test_cpu(i, &mask)) {
- ccall_info.processors_in[i] = 0;
- ccall_info.processors_out[i] = 0;
- sun4d_send_ipi(i, IRQ_CROSS_CALL);
- }
- }
- }
-
- {
- register int i;
-
- i = 0;
- do {
- if (!cpumask_test_cpu(i, &mask))
- continue;
- while (!ccall_info.processors_in[i])
- barrier();
- } while (++i <= high);
-
- i = 0;
- do {
- if (!cpumask_test_cpu(i, &mask))
- continue;
- while (!ccall_info.processors_out[i])
- barrier();
- } while (++i <= high);
- }
-
- spin_unlock_irqrestore(&cross_call_lock, flags);
- }
-}
-
-/* Running cross calls. */
-void smp4d_cross_call_irq(void)
-{
- int i = hard_smp_processor_id();
-
- ccall_info.processors_in[i] = 1;
- ccall_info.func(ccall_info.arg1, ccall_info.arg2, ccall_info.arg3,
- ccall_info.arg4, ccall_info.arg5);
- ccall_info.processors_out[i] = 1;
-}
-
-void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
-{
- struct pt_regs *old_regs;
- int cpu = hard_smp_processor_id();
- struct clock_event_device *ce;
- static int cpu_tick[NR_CPUS];
- static char led_mask[] = { 0xe, 0xd, 0xb, 0x7, 0xb, 0xd };
-
- old_regs = set_irq_regs(regs);
- bw_get_prof_limit(cpu);
- bw_clear_intr_mask(0, 1); /* INTR_TABLE[0] & 1 is Profile IRQ */
-
- cpu_tick[cpu]++;
- if (!(cpu_tick[cpu] & 15)) {
- if (cpu_tick[cpu] == 0x60)
- cpu_tick[cpu] = 0;
- cpu_leds[cpu] = led_mask[cpu_tick[cpu] >> 4];
- show_leds(cpu);
- }
-
- ce = &per_cpu(sparc32_clockevent, cpu);
-
- irq_enter();
- ce->event_handler(ce);
- irq_exit();
-
- set_irq_regs(old_regs);
-}
-
-static const struct sparc32_ipi_ops sun4d_ipi_ops = {
- .cross_call = sun4d_cross_call,
- .resched = sun4d_ipi_resched,
- .single = sun4d_ipi_single,
- .mask_one = sun4d_ipi_mask_one,
-};
-
-void __init sun4d_init_smp(void)
-{
- int i;
-
- sparc32_ipi_ops = &sun4d_ipi_ops;
-
- for (i = 0; i < NR_CPUS; i++) {
- ccall_info.processors_in[i] = 1;
- ccall_info.processors_out[i] = 1;
- }
-}
diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c
deleted file mode 100644
index 228a6527082d..000000000000
--- a/arch/sparc/kernel/sun4m_smp.c
+++ /dev/null
@@ -1,273 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * sun4m SMP support.
- *
- * Copyright (C) 1996 David S. Miller (davem@xxxxxxxxxxxxxxxx)
- */
-
-#include <linux/clockchips.h>
-#include <linux/interrupt.h>
-#include <linux/profile.h>
-#include <linux/delay.h>
-#include <linux/sched/mm.h>
-#include <linux/cpu.h>
-
-#include <asm/cacheflush.h>
-#include <asm/switch_to.h>
-#include <asm/tlbflush.h>
-#include <asm/timer.h>
-#include <asm/oplib.h>
-
-#include "irq.h"
-#include "kernel.h"
-
-#define IRQ_IPI_SINGLE 12
-#define IRQ_IPI_MASK 13
-#define IRQ_IPI_RESCHED 14
-#define IRQ_CROSS_CALL 15
-
-static inline unsigned long
-swap_ulong(volatile unsigned long *ptr, unsigned long val)
-{
- __asm__ __volatile__("swap [%1], %0\n\t" :
- "=&r" (val), "=&r" (ptr) :
- "0" (val), "1" (ptr));
- return val;
-}
-
-void sun4m_cpu_pre_starting(void *arg)
-{
-}
-
-void sun4m_cpu_pre_online(void *arg)
-{
- int cpuid = hard_smp_processor_id();
-
- /* Allow master to continue. The master will then give us the
- * go-ahead by setting the smp_commenced_mask and will wait without
- * timeouts until our setup is completed fully (signified by
- * our bit being set in the cpu_online_mask).
- */
- swap_ulong(&cpu_callin_map[cpuid], 1);
-
- /* XXX: What's up with all the flushes? */
- local_ops->cache_all();
- local_ops->tlb_all();
-
- /* Fix idle thread fields. */
- __asm__ __volatile__("ld [%0], %%g6\n\t"
- : : "r" (&current_set[cpuid])
- : "memory" /* paranoid */);
-
- /* Attach to the address space of init_task. */
- mmgrab(&init_mm);
- current->active_mm = &init_mm;
-
- while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
- mb();
-}
-
-/*
- * Cycle through the processors asking the PROM to start each one.
- */
-void __init smp4m_boot_cpus(void)
-{
- sun4m_unmask_profile_irq();
- local_ops->cache_all();
-}
-
-int smp4m_boot_one_cpu(int i, struct task_struct *idle)
-{
- unsigned long *entry = &sun4m_cpu_startup;
- int timeout;
- int cpu_node;
-
- cpu_find_by_mid(i, &cpu_node);
- current_set[i] = task_thread_info(idle);
-
- /* See trampoline.S for details... */
- entry += ((i - 1) * 3);
-
- /*
- * Initialize the contexts table
- * Since the call to prom_startcpu() trashes the structure,
- * we need to re-initialize it for each cpu
- */
- smp_penguin_ctable.which_io = 0;
- smp_penguin_ctable.phys_addr = (unsigned int) srmmu_ctx_table_phys;
- smp_penguin_ctable.reg_size = 0;
-
- /* whirrr, whirrr, whirrrrrrrrr... */
- printk(KERN_INFO "Starting CPU %d at %p\n", i, entry);
- local_ops->cache_all();
- prom_startcpu(cpu_node, &smp_penguin_ctable, 0, (char *)entry);
-
- /* wheee... it's going... */
- for (timeout = 0; timeout < 10000; timeout++) {
- if (cpu_callin_map[i])
- break;
- udelay(200);
- }
-
- if (!(cpu_callin_map[i])) {
- printk(KERN_ERR "Processor %d is stuck.\n", i);
- return -ENODEV;
- }
-
- local_ops->cache_all();
- return 0;
-}
-
-void __init smp4m_smp_done(void)
-{
- int i, first;
- int *prev;
-
- /* setup cpu list for irq rotation */
- first = 0;
- prev = &first;
- for_each_online_cpu(i) {
- *prev = i;
- prev = &cpu_data(i).next;
- }
- *prev = first;
- local_ops->cache_all();
-
- /* Ok, they are spinning and ready to go. */
-}
-
-static void sun4m_send_ipi(int cpu, int level)
-{
- sbus_writel(SUN4M_SOFT_INT(level), &sun4m_irq_percpu[cpu]->set);
-}
-
-static void sun4m_ipi_resched(int cpu)
-{
- sun4m_send_ipi(cpu, IRQ_IPI_RESCHED);
-}
-
-static void sun4m_ipi_single(int cpu)
-{
- sun4m_send_ipi(cpu, IRQ_IPI_SINGLE);
-}
-
-static void sun4m_ipi_mask_one(int cpu)
-{
- sun4m_send_ipi(cpu, IRQ_IPI_MASK);
-}
-
-static struct smp_funcall {
- smpfunc_t func;
- unsigned long arg1;
- unsigned long arg2;
- unsigned long arg3;
- unsigned long arg4;
- unsigned long arg5;
- unsigned long processors_in[SUN4M_NCPUS]; /* Set when ipi entered. */
- unsigned long processors_out[SUN4M_NCPUS]; /* Set when ipi exited. */
-} ccall_info;
-
-static DEFINE_SPINLOCK(cross_call_lock);
-
-/* Cross calls must be serialized, at least currently. */
-static void sun4m_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
- unsigned long arg2, unsigned long arg3,
- unsigned long arg4)
-{
- register int ncpus = SUN4M_NCPUS;
- unsigned long flags;
-
- spin_lock_irqsave(&cross_call_lock, flags);
-
- /* Init function glue. */
- ccall_info.func = func;
- ccall_info.arg1 = arg1;
- ccall_info.arg2 = arg2;
- ccall_info.arg3 = arg3;
- ccall_info.arg4 = arg4;
- ccall_info.arg5 = 0;
-
- /* Init receive/complete mapping, plus fire the IPI's off. */
- {
- register int i;
-
- cpumask_clear_cpu(smp_processor_id(), &mask);
- cpumask_and(&mask, cpu_online_mask, &mask);
- for (i = 0; i < ncpus; i++) {
- if (cpumask_test_cpu(i, &mask)) {
- ccall_info.processors_in[i] = 0;
- ccall_info.processors_out[i] = 0;
- sun4m_send_ipi(i, IRQ_CROSS_CALL);
- } else {
- ccall_info.processors_in[i] = 1;
- ccall_info.processors_out[i] = 1;
- }
- }
- }
-
- {
- register int i;
-
- i = 0;
- do {
- if (!cpumask_test_cpu(i, &mask))
- continue;
- while (!ccall_info.processors_in[i])
- barrier();
- } while (++i < ncpus);
-
- i = 0;
- do {
- if (!cpumask_test_cpu(i, &mask))
- continue;
- while (!ccall_info.processors_out[i])
- barrier();
- } while (++i < ncpus);
- }
- spin_unlock_irqrestore(&cross_call_lock, flags);
-}
-
-/* Running cross calls. */
-void smp4m_cross_call_irq(void)
-{
- int i = smp_processor_id();
-
- ccall_info.processors_in[i] = 1;
- ccall_info.func(ccall_info.arg1, ccall_info.arg2, ccall_info.arg3,
- ccall_info.arg4, ccall_info.arg5);
- ccall_info.processors_out[i] = 1;
-}
-
-void smp4m_percpu_timer_interrupt(struct pt_regs *regs)
-{
- struct pt_regs *old_regs;
- struct clock_event_device *ce;
- int cpu = smp_processor_id();
-
- old_regs = set_irq_regs(regs);
-
- ce = &per_cpu(sparc32_clockevent, cpu);
-
- if (clockevent_state_periodic(ce))
- sun4m_clear_profile_irq(cpu);
- else
- sparc_config.load_profile_irq(cpu, 0); /* Is this needless? */
-
- irq_enter();
- ce->event_handler(ce);
- irq_exit();
-
- set_irq_regs(old_regs);
-}
-
-static const struct sparc32_ipi_ops sun4m_ipi_ops = {
- .cross_call = sun4m_cross_call,
- .resched = sun4m_ipi_resched,
- .single = sun4m_ipi_single,
- .mask_one = sun4m_ipi_mask_one,
-};
-
-void __init sun4m_init_smp(void)
-{
- sparc32_ipi_ops = &sun4m_ipi_ops;
-}
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index a03caa5f6628..d82cec45023a 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -1818,14 +1818,8 @@ void __init load_mmu(void)
&smp_cachetlb_ops;
#endif

- if (sparc_cpu_model != sun4d)
- ld_mmu_iommu();
+ ld_mmu_iommu();
#ifdef CONFIG_SMP
- if (sparc_cpu_model == sun4d)
- sun4d_init_smp();
- else if (sparc_cpu_model == sparc_leon)
- leon_init_smp();
- else
- sun4m_init_smp();
+ leon_init_smp();
#endif
}
--
2.27.0