/*
- * arch/sparc/kernel/sun4d_irq.c:
- * SS1000/SC2000 interrupt handling.
+ * SS1000/SC2000 interrupt handling.
*
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Heavily based on arch/sparc/kernel/irq.c.
*/
-#include <linux/errno.h>
-#include <linux/linkage.h>
#include <linux/kernel_stat.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/ptrace.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/spinlock.h>
#include <linux/seq_file.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-
-#include <asm/ptrace.h>
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/psr.h>
-#include <asm/smp.h>
-#include <asm/vaddrs.h>
+
#include <asm/timer.h>
-#include <asm/openprom.h>
-#include <asm/oplib.h>
#include <asm/traps.h>
#include <asm/irq.h>
#include <asm/io.h>
-#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
#include <asm/sbi.h>
#include <asm/cacheflush.h>
-#include <asm/irq_regs.h>
#include "kernel.h"
#include "irq.h"
-/* If you trust current SCSI layer to handle different SCSI IRQs, enable this. I don't trust it... -jj */
+/* Sun4d interrupts fall roughly into two categories. SBUS and
+ * cpu local. CPU local interrupts cover the timer interrupts
+ * and whatnot, and we encode those as normal PILs between
+ * 0 and 15.
+ *
+ * SBUS interrupts are encoded integers including the board number
+ * (plus one), the SBUS level, and the SBUS slot number. Sun4D
+ * IRQ dispatch is done by:
+ *
+ * 1) Reading the BW local interrupt table in order to get the bus
+ * interrupt mask.
+ *
+ * This table is indexed by SBUS interrupt level which can be
+ * derived from the PIL we got interrupted on.
+ *
+ * 2) For each bus showing interrupt pending from #1, read the
+ * SBI interrupt state register. This will indicate which slots
+ * have interrupts pending for that SBUS interrupt level.
+ */
+
+/*
+ * If you trust current SCSI layer to handle different
+ * SCSI IRQs, enable this.
+ * I don't trust it... -jj
+ */
/* #define DISTRIBUTE_IRQS */
struct sun4d_timer_regs {
#define TIMER_IRQ 10
#define MAX_STATIC_ALLOC 4
-extern int static_irq_count;
static unsigned char sbus_tid[32];
static struct irqaction *irq_action[NR_IRQS];
-extern spinlock_t irq_action_lock;
static struct sbus_action {
struct irqaction *action;
} *sbus_actions;
static int pil_to_sbus[] = {
- 0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
+ 0,
+ 0,
+ 1,
+ 2,
+ 0,
+ 3,
+ 0,
+ 4,
+ 0,
+ 5,
+ 0,
+ 6,
+ 0,
+ 7,
+ 0,
+ 0,
};
static int sbus_to_pil[] = {
- 0, 2, 3, 5, 7, 9, 11, 13,
+ 0,
+ 2,
+ 3,
+ 5,
+ 7,
+ 9,
+ 11,
+ 13,
};
static int nsbi;
int show_sun4d_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j = 0, k = 0, sbusl;
- struct irqaction * action;
+ struct irqaction *action;
unsigned long flags;
#ifdef CONFIG_SMP
int x;
if (i < NR_IRQS) {
sbusl = pil_to_sbus[i];
if (!sbusl) {
- action = *(i + irq_action);
- if (!action)
- goto out_unlock;
+ action = *(i + irq_action);
+ if (!action)
+ goto out_unlock;
} else {
for (j = 0; j < nsbi; j++) {
for (k = 0; k < 4; k++)
- if ((action = sbus_actions [(j << 5) + (sbusl << 2) + k].action))
+ action = sbus_actions[(j << 5) + (sbusl << 2) + k].action;
+ if (action)
goto found_it;
}
goto out_unlock;
(action->flags & IRQF_DISABLED) ? " +" : "",
action->name);
}
- if (!sbusl) break;
+ if (!sbusl)
+ break;
k++;
- if (k < 4)
- action = sbus_actions [(j << 5) + (sbusl << 2) + k].action;
- else {
+ if (k < 4) {
+ action = sbus_actions[(j << 5) + (sbusl << 2) + k].action;
+ } else {
j++;
- if (j == nsbi) break;
+ if (j == nsbi)
+ break;
k = 0;
- action = sbus_actions [(j << 5) + (sbusl << 2)].action;
+ action = sbus_actions[(j << 5) + (sbusl << 2)].action;
}
}
seq_putc(p, '\n');
{
struct irqaction *action, **actionp;
struct irqaction *tmp = NULL;
- unsigned long flags;
+ unsigned long flags;
spin_lock_irqsave(&irq_action_lock, flags);
if (irq < 15)
actionp = &(sbus_actions[irq - (1 << 5)].action);
action = *actionp;
if (!action) {
- printk("Trying to free free IRQ%d\n",irq);
+ printk(KERN_ERR "Trying to free free IRQ%d\n", irq);
goto out_unlock;
}
if (dev_id) {
tmp = action;
}
if (!action) {
- printk("Trying to free free shared IRQ%d\n",irq);
+ printk(KERN_ERR "Trying to free free shared IRQ%d\n",
+ irq);
goto out_unlock;
}
} else if (action->flags & IRQF_SHARED) {
- printk("Trying to free shared IRQ%d with NULL device ID\n", irq);
+ printk(KERN_ERR "Trying to free shared IRQ%d with NULL device ID\n",
+ irq);
goto out_unlock;
}
- if (action->flags & SA_STATIC_ALLOC)
- {
- /* This interrupt is marked as specially allocated
+ if (action->flags & SA_STATIC_ALLOC) {
+ /*
+ * This interrupt is marked as specially allocated
* so it is a bad idea to free it.
*/
- printk("Attempt to free statically allocated IRQ%d (%s)\n",
+ printk(KERN_ERR "Attempt to free statically allocated IRQ%d (%s)\n",
irq, action->name);
goto out_unlock;
}
-
+
if (tmp)
tmp->next = action->next;
else
spin_unlock_irqrestore(&irq_action_lock, flags);
}
-extern void unexpected_irq(int, void *, struct pt_regs *);
-
-void sun4d_handler_irq(int pil, struct pt_regs * regs)
+void sun4d_handler_irq(int pil, struct pt_regs *regs)
{
struct pt_regs *old_regs;
- struct irqaction * action;
+ struct irqaction *action;
int cpu = smp_processor_id();
/* SBUS IRQ level (1 - 7) */
int sbusl = pil_to_sbus[pil];
-
+
/* FIXME: Is this necessary?? */
cc_get_ipen();
-
+
cc_set_iclr(1 << pil);
-
+
old_regs = set_irq_regs(regs);
irq_enter();
kstat_cpu(cpu).irqs[pil]++;
struct sbus_action *actionp;
unsigned mask, slot;
int sbil = (sbusl << 2);
-
+
bw_clear_intr_mask(sbusl, bus_mask);
-
+
/* Loop for each pending SBI */
for (sbino = 0; bus_mask; sbino++, bus_mask >>= 1)
if (bus_mask & 1) {
if (mask & slot) {
mask &= ~slot;
action = actionp->action;
-
+
if (!action)
unexpected_irq(pil, NULL, regs);
do {
int sun4d_request_irq(unsigned int irq,
irq_handler_t handler,
- unsigned long irqflags, const char * devname, void *dev_id)
+ unsigned long irqflags, const char *devname, void *dev_id)
{
struct irqaction *action, *tmp = NULL, **actionp;
unsigned long flags;
int ret;
-
- if(irq > 14 && irq < (1 << 5)) {
+
+ if (irq > 14 && irq < (1 << 5)) {
ret = -EINVAL;
goto out;
}
else
actionp = irq + irq_action;
action = *actionp;
-
+
if (action) {
if ((action->flags & IRQF_SHARED) && (irqflags & IRQF_SHARED)) {
for (tmp = action; tmp->next; tmp = tmp->next);
goto out_unlock;
}
if ((action->flags & IRQF_DISABLED) ^ (irqflags & IRQF_DISABLED)) {
- printk("Attempt to mix fast and slow interrupts on IRQ%d denied\n", irq);
+ printk(KERN_ERR "Attempt to mix fast and slow interrupts on IRQ%d denied\n",
+ irq);
ret = -EBUSY;
goto out_unlock;
}
if (static_irq_count < MAX_STATIC_ALLOC)
action = &static_irqaction[static_irq_count++];
else
- printk("Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n", irq, devname);
+ printk(KERN_ERR "Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n",
+ irq, devname);
}
-
+
if (action == NULL)
- action = kmalloc(sizeof(struct irqaction),
- GFP_ATOMIC);
-
- if (!action) {
+ action = kmalloc(sizeof(struct irqaction), GFP_ATOMIC);
+
+ if (!action) {
ret = -ENOMEM;
goto out_unlock;
}
tmp->next = action;
else
*actionp = action;
-
+
__enable_irq(irq);
ret = 0;
{
int tid = sbus_tid[(irq >> 5) - 1];
unsigned long flags;
-
+
if (irq < NR_IRQS)
return;
{
int tid = sbus_tid[(irq >> 5) - 1];
unsigned long flags;
-
+
if (irq < NR_IRQS)
return;
int board = of_getintprop_default(dp, "board#", 0);
if (sbus_tid[board] == 0xff) {
int i = 31;
-
+
if (cpus_empty(sbus_serving_map))
sbus_serving_map = cpu_present_map;
while (cpu_isset(i, sbus_serving_map))
for_each_node_by_name(dp, "sbi") {
int devid = of_getintprop_default(dp, "device-id", 0);
int board = of_getintprop_default(dp, "board#", 0);
- printk("sbus%d IRQs directed to CPU%d\n", board, sbus_tid[board]);
+ printk(KERN_ERR "sbus%d IRQs directed to CPU%d\n",
+ board, sbus_tid[board]);
set_sbi_tid(devid, sbus_tid[board] << 3);
}
#else
sbus_tid[board] = cpuid;
set_sbi_tid(devid, cpuid << 3);
}
- printk("All sbus IRQs directed to CPU%d\n", cpuid);
+ printk(KERN_ERR "All sbus IRQs directed to CPU%d\n", cpuid);
#endif
}
#endif
-
+
static void sun4d_clear_clock_irq(void)
{
sbus_readl(&sun4d_timers->l10_timer_limit);
{
#ifdef CONFIG_SMP
unsigned long flags;
- extern unsigned long lvl14_save[4];
struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];
- extern unsigned int real_irq_entry[], smp4d_ticker[];
- extern unsigned int patchme_maybe_smp_msg[];
/* Adjust so that we jump directly to smp4d_ticker */
lvl14_save[2] += smp4d_ticker - real_irq_entry;
(IRQF_DISABLED | SA_STATIC_ALLOC),
"timer", NULL);
if (err) {
- prom_printf("sun4d_init_timers: request_irq() failed with %d\n", err);
+ prom_printf("sun4d_init_timers: request_irq() failed with %d\n",
+ err);
prom_halt();
}
sun4d_load_profile_irqs();
nsbi = 0;
for_each_node_by_name(dp, "sbi")
nsbi++;
- sbus_actions = kzalloc (nsbi * 8 * 4 * sizeof(struct sbus_action), GFP_ATOMIC);
+ sbus_actions = kzalloc(nsbi * 8 * 4 * sizeof(struct sbus_action), GFP_ATOMIC);
if (!sbus_actions) {
prom_printf("SUN4D: Cannot allocate sbus_actions, halting.\n");
prom_halt();
/* Get rid of pending irqs from PROM */
mask = acquire_sbi(devid, 0xffffffff);
if (mask) {
- printk ("Clearing pending IRQs %08x on SBI %d\n", mask, board);
+ printk(KERN_ERR "Clearing pending IRQs %08x on SBI %d\n",
+ mask, board);
release_sbi(devid, mask);
}
}
-/* sun4d_smp.c: Sparc SS1000/SC2000 SMP support.
+/* Sparc SS1000/SC2000 SMP support.
*
* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
-#include <asm/head.h>
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/threads.h>
-#include <linux/smp.h>
#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
#include <linux/profile.h>
#include <linux/delay.h>
#include <linux/cpu.h>
-#include <asm/ptrace.h>
-#include <asm/atomic.h>
-#include <asm/irq_regs.h>
-
-#include <asm/irq.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
-#include <asm/oplib.h>
#include <asm/sbi.h>
+#include <asm/mmu.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
-#include <asm/cpudata.h>
+#include "kernel.h"
#include "irq.h"
-#define IRQ_CROSS_CALL 15
-extern ctxd_t *srmmu_ctx_table_phys;
+#define IRQ_CROSS_CALL 15
-static volatile int smp_processors_ready = 0;
+static volatile int smp_processors_ready;
static int smp_highest_cpu;
-extern volatile unsigned long cpu_callin_map[NR_CPUS];
-extern cpuinfo_sparc cpu_data[NR_CPUS];
-extern unsigned char boot_cpu_id;
-extern volatile int smp_process_available;
-
-extern cpumask_t smp_commenced_mask;
-
-extern int __smp4d_processor_id(void);
-
-/* #define SMP_DEBUG */
-
-#ifdef SMP_DEBUG
-#define SMP_PRINTK(x) printk x
-#else
-#define SMP_PRINTK(x)
-#endif
static inline unsigned long sun4d_swap(volatile unsigned long *ptr, unsigned long val)
{
}
static void smp_setup_percpu_timer(void);
-extern void cpu_probe(void);
-extern void sun4d_distribute_irqs(void);
static unsigned char cpu_leds[32];
void __cpuinit smp4d_callin(void)
{
int cpuid = hard_smp4d_processor_id();
- extern spinlock_t sun4d_imsk_lock;
unsigned long flags;
-
+
/* Show we are alive */
cpu_leds[cpuid] = 0x6;
show_leds(cpuid);
sun4d_swap((unsigned long *)&cpu_callin_map[cpuid], 1);
local_flush_cache_all();
local_flush_tlb_all();
-
+
cpu_probe();
- while((unsigned long)current_set[cpuid] < PAGE_OFFSET)
+ while ((unsigned long)current_set[cpuid] < PAGE_OFFSET)
barrier();
-
- while(current_set[cpuid]->cpu != cpuid)
+
+ while (current_set[cpuid]->cpu != cpuid)
barrier();
-
+
/* Fix idle thread fields. */
__asm__ __volatile__("ld [%0], %%g6\n\t"
: : "r" (¤t_set[cpuid])
cpu_leds[cpuid] = 0x9;
show_leds(cpuid);
-
+
/* Attach to the address space of init_task. */
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
local_flush_cache_all();
local_flush_tlb_all();
-
+
local_irq_enable(); /* We don't allow PIL 14 yet */
-
+
while (!cpu_isset(cpuid, smp_commenced_mask))
barrier();
}
-extern void init_IRQ(void);
-extern void cpu_panic(void);
-
/*
* Cycle through the processors asking the PROM to start each one.
*/
-
-extern struct linux_prom_registers smp_penguin_ctable;
-
void __init smp4d_boot_cpus(void)
{
if (boot_cpu_id)
int __cpuinit smp4d_boot_one_cpu(int i)
{
- extern unsigned long sun4d_cpu_startup;
- unsigned long *entry = &sun4d_cpu_startup;
- struct task_struct *p;
- int timeout;
- int cpu_node;
+ unsigned long *entry = &sun4d_cpu_startup;
+ struct task_struct *p;
+ int timeout;
+ int cpu_node;
- cpu_find_by_instance(i, &cpu_node,NULL);
- /* Cook up an idler for this guy. */
- p = fork_idle(i);
- current_set[i] = task_thread_info(p);
+ cpu_find_by_instance(i, &cpu_node, NULL);
+ /* Cook up an idler for this guy. */
+ p = fork_idle(i);
+ current_set[i] = task_thread_info(p);
+
+ /*
+ * 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_flush_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);
+ }
- /*
- * 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... */
- SMP_PRINTK(("Starting CPU %d at %p\n", i, entry));
- local_flush_cache_all();
- prom_startcpu(cpu_node,
- &smp_penguin_ctable, 0, (char *)entry);
-
- SMP_PRINTK(("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("Processor %d is stuck.\n", i);
+ printk(KERN_ERR "Processor %d is stuck.\n", i);
return -ENODEV;
}
unsigned long arg2, unsigned long arg3,
unsigned long arg4)
{
- if(smp_processors_ready) {
+ 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... */
+ /*
+ * 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;
cpu_clear(smp_processor_id(), mask);
cpus_and(mask, cpu_online_map, mask);
- for(i = 0; i <= high; i++) {
+ for (i = 0; i <= high; i++) {
if (cpu_isset(i, mask)) {
ccall_info.processors_in[i] = 0;
ccall_info.processors_out[i] = 0;
do {
if (!cpu_isset(i, mask))
continue;
- while(!ccall_info.processors_in[i])
+ while (!ccall_info.processors_in[i])
barrier();
- } while(++i <= high);
+ } while (++i <= high);
i = 0;
do {
if (!cpu_isset(i, mask))
continue;
- while(!ccall_info.processors_out[i])
+ while (!ccall_info.processors_out[i])
barrier();
- } while(++i <= high);
+ } while (++i <= high);
}
spin_unlock_irqrestore(&cross_call_lock, flags);
static char led_mask[] = { 0xe, 0xd, 0xb, 0x7, 0xb, 0xd };
old_regs = set_irq_regs(regs);
- bw_get_prof_limit(cpu);
+ bw_get_prof_limit(cpu);
bw_clear_intr_mask(0, 1); /* INTR_TABLE[0] & 1 is Profile IRQ */
cpu_tick[cpu]++;
profile_tick(CPU_PROFILING);
- if(!--prof_counter(cpu)) {
+ if (!--prof_counter(cpu)) {
int user = user_mode(regs);
irq_enter();
set_irq_regs(old_regs);
}
-extern unsigned int lvl14_resolution;
-
static void __cpuinit smp_setup_percpu_timer(void)
{
int cpu = hard_smp4d_processor_id();
void __init smp4d_blackbox_id(unsigned *addr)
{
int rd = *addr & 0x3e000000;
-
+
addr[0] = 0xc0800800 | rd; /* lda [%g0] ASI_M_VIKING_TMP1, reg */
- addr[1] = 0x01000000; /* nop */
- addr[2] = 0x01000000; /* nop */
+ addr[1] = 0x01000000; /* nop */
+ addr[2] = 0x01000000; /* nop */
}
void __init smp4d_blackbox_current(unsigned *addr)
{
int rd = *addr & 0x3e000000;
-
+
addr[0] = 0xc0800800 | rd; /* lda [%g0] ASI_M_VIKING_TMP1, reg */
addr[2] = 0x81282002 | rd | (rd >> 11); /* sll reg, 2, reg */
addr[4] = 0x01000000; /* nop */
void __init sun4d_init_smp(void)
{
int i;
- extern unsigned int t_nmi[], linux_trap_ipi15_sun4d[], linux_trap_ipi15_sun4m[];
/* Patch ipi15 trap table */
t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_sun4d - linux_trap_ipi15_sun4m);
-
+
/* And set btfixup... */
BTFIXUPSET_BLACKBOX(hard_smp_processor_id, smp4d_blackbox_id);
BTFIXUPSET_BLACKBOX(load_current, smp4d_blackbox_current);
BTFIXUPSET_CALL(smp_cross_call, smp4d_cross_call, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(__hard_smp_processor_id, __smp4d_processor_id, BTFIXUPCALL_NORM);
-
+
for (i = 0; i < NR_CPUS; i++) {
ccall_info.processors_in[i] = 1;
ccall_info.processors_out[i] = 1;
projects / firefly-linux-kernel-4.4.55.git / commitdiff