* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/interrupt.h>
+#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/kernel_stat.h>
#include <asm/errno.h>
+#include <asm/irq_regs.h>
#include <asm/signal.h>
#include <asm/system.h>
-#include <asm/ptrace.h>
#include <asm/io.h>
#include <asm/sibyte/bcm1480_regs.h>
*/
-#define shutdown_bcm1480_irq disable_bcm1480_irq
static void end_bcm1480_irq(unsigned int irq);
static void enable_bcm1480_irq(unsigned int irq);
static void disable_bcm1480_irq(unsigned int irq);
-static unsigned int startup_bcm1480_irq(unsigned int irq);
static void ack_bcm1480_irq(unsigned int irq);
#ifdef CONFIG_SMP
-static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask);
+static int bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask);
#endif
#ifdef CONFIG_PCI
extern unsigned long ht_eoi_space;
#endif
-#ifdef CONFIG_KGDB
-#include <asm/gdb-stub.h>
-extern void breakpoint(void);
-static int kgdb_irq;
-#ifdef CONFIG_GDB_CONSOLE
-extern void register_gdb_console(void);
-#endif
-
-/* kgdb is on when configured. Pass "nokgdb" kernel arg to turn it off */
-static int kgdb_flag = 1;
-static int __init nokgdb(char *str)
-{
- kgdb_flag = 0;
- return 1;
-}
-__setup("nokgdb", nokgdb);
-
-/* Default to UART1 */
-int kgdb_port = 1;
-#ifdef CONFIG_SIBYTE_SB1250_DUART
-extern char sb1250_duart_present[];
-#endif
-#endif
-
-static struct hw_interrupt_type bcm1480_irq_type = {
- .typename = "BCM1480-IMR",
- .startup = startup_bcm1480_irq,
- .shutdown = shutdown_bcm1480_irq,
- .enable = enable_bcm1480_irq,
- .disable = disable_bcm1480_irq,
+static struct irq_chip bcm1480_irq_type = {
+ .name = "BCM1480-IMR",
.ack = ack_bcm1480_irq,
+ .mask = disable_bcm1480_irq,
+ .mask_ack = ack_bcm1480_irq,
+ .unmask = enable_bcm1480_irq,
.end = end_bcm1480_irq,
#ifdef CONFIG_SMP
.set_affinity = bcm1480_set_affinity
void bcm1480_mask_irq(int cpu, int irq)
{
- unsigned long flags;
- u64 cur_ints,hl_spacing;
+ unsigned long flags, hl_spacing;
+ u64 cur_ints;
spin_lock_irqsave(&bcm1480_imr_lock, flags);
hl_spacing = 0;
void bcm1480_unmask_irq(int cpu, int irq)
{
- unsigned long flags;
- u64 cur_ints,hl_spacing;
+ unsigned long flags, hl_spacing;
+ u64 cur_ints;
spin_lock_irqsave(&bcm1480_imr_lock, flags);
hl_spacing = 0;
}
#ifdef CONFIG_SMP
-static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask)
+static int bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask)
{
int i = 0, old_cpu, cpu, int_on, k;
u64 cur_ints;
- irq_desc_t *desc = irq_desc + irq;
unsigned long flags;
unsigned int irq_dirty;
- i = first_cpu(mask);
- if (next_cpu(i, mask) <= NR_CPUS) {
+ if (cpumask_weight(mask) != 1) {
printk("attempted to set irq affinity for irq %d to multiple CPUs\n", irq);
- return;
+ return -1;
}
+ i = cpumask_first(mask);
/* Convert logical CPU to physical CPU */
cpu = cpu_logical_map(i);
/* Protect against other affinity changers and IMR manipulation */
- spin_lock_irqsave(&desc->lock, flags);
- spin_lock(&bcm1480_imr_lock);
+ spin_lock_irqsave(&bcm1480_imr_lock, flags);
/* Swizzle each CPU's IMR (but leave the IP selection alone) */
old_cpu = bcm1480_irq_owner[irq];
____raw_writeq(cur_ints, IOADDR(A_BCM1480_IMR_MAPPER(cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + (k*BCM1480_IMR_HL_SPACING)));
}
}
- spin_unlock(&bcm1480_imr_lock);
- spin_unlock_irqrestore(&desc->lock, flags);
+ spin_unlock_irqrestore(&bcm1480_imr_lock, flags);
+
+ return 0;
}
#endif
/*****************************************************************************/
-static unsigned int startup_bcm1480_irq(unsigned int irq)
-{
- bcm1480_unmask_irq(bcm1480_irq_owner[irq], irq);
-
- return 0; /* never anything pending */
-}
-
-
static void disable_bcm1480_irq(unsigned int irq)
{
bcm1480_mask_irq(bcm1480_irq_owner[irq], irq);
{
int i;
- for (i = 0; i < NR_IRQS; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = 0;
- irq_desc[i].depth = 1;
- if (i < BCM1480_NR_IRQS) {
- irq_desc[i].handler = &bcm1480_irq_type;
- bcm1480_irq_owner[i] = 0;
- } else {
- irq_desc[i].handler = &no_irq_type;
- }
- }
-}
-
-
-static irqreturn_t bcm1480_dummy_handler(int irq, void *dev_id,
- struct pt_regs *regs)
-{
- return IRQ_NONE;
-}
-
-static struct irqaction bcm1480_dummy_action = {
- .handler = bcm1480_dummy_handler,
- .flags = 0,
- .mask = CPU_MASK_NONE,
- .name = "bcm1480-private",
- .next = NULL,
- .dev_id = 0
-};
-
-int bcm1480_steal_irq(int irq)
-{
- irq_desc_t *desc = irq_desc + irq;
- unsigned long flags;
- int retval = 0;
-
- if (irq >= BCM1480_NR_IRQS)
- return -EINVAL;
-
- spin_lock_irqsave(&desc->lock,flags);
- /* Don't allow sharing at all for these */
- if (desc->action != NULL)
- retval = -EBUSY;
- else {
- desc->action = &bcm1480_dummy_action;
- desc->depth = 0;
+ for (i = 0; i < BCM1480_NR_IRQS; i++) {
+ set_irq_chip_and_handler(i, &bcm1480_irq_type, handle_level_irq);
+ bcm1480_irq_owner[i] = 0;
}
- spin_unlock_irqrestore(&desc->lock,flags);
- return 0;
}
/*
void __init arch_init_irq(void)
{
-
unsigned int i, cpu;
u64 tmp;
unsigned int imask = STATUSF_IP4 | STATUSF_IP3 | STATUSF_IP2 |
__raw_writeq(tmp, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MASK_L)));
}
- bcm1480_steal_irq(K_BCM1480_INT_MBOX_0_0);
-
/*
* Note that the timer interrupts are also mapped, but this is
* done in bcm1480_time_init(). Also, the profiling driver
* does its own management of IP7.
*/
-#ifdef CONFIG_KGDB
- imask |= STATUSF_IP6;
-#endif
/* Enable necessary IPs, disable the rest */
change_c0_status(ST0_IM, imask);
-
-#ifdef CONFIG_KGDB
- if (kgdb_flag) {
- kgdb_irq = K_BCM1480_INT_UART_0 + kgdb_port;
-
-#ifdef CONFIG_SIBYTE_SB1250_DUART
- sb1250_duart_present[kgdb_port] = 0;
-#endif
- /* Setup uart 1 settings, mapper */
- /* QQQ FIXME */
- __raw_writeq(M_DUART_IMR_BRK, IO_SPACE_BASE + A_DUART_IMRREG(kgdb_port));
-
- bcm1480_steal_irq(kgdb_irq);
- __raw_writeq(IMR_IP6_VAL,
- IO_SPACE_BASE + A_BCM1480_IMR_REGISTER(0, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) +
- (kgdb_irq<<3));
- bcm1480_unmask_irq(0, kgdb_irq);
-
-#ifdef CONFIG_GDB_CONSOLE
- register_gdb_console();
-#endif
- prom_printf("Waiting for GDB on UART port %d\n", kgdb_port);
- set_debug_traps();
- breakpoint();
- }
-#endif
}
-#ifdef CONFIG_KGDB
-
-#include <linux/delay.h>
+extern void bcm1480_mailbox_interrupt(void);
-#define duart_out(reg, val) csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
-#define duart_in(reg) csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
-
-void bcm1480_kgdb_interrupt(struct pt_regs *regs)
+static inline void dispatch_ip2(void)
{
+ unsigned long long mask_h, mask_l;
+ unsigned int cpu = smp_processor_id();
+ unsigned long base;
+
/*
- * Clear break-change status (allow some time for the remote
- * host to stop the break, since we would see another
- * interrupt on the end-of-break too)
+ * Default...we've hit an IP[2] interrupt, which means we've got to
+ * check the 1480 interrupt registers to figure out what to do. Need
+ * to detect which CPU we're on, now that smp_affinity is supported.
*/
- kstat.irqs[smp_processor_id()][kgdb_irq]++;
- mdelay(500);
- duart_out(R_DUART_CMD, V_DUART_MISC_CMD_RESET_BREAK_INT |
- M_DUART_RX_EN | M_DUART_TX_EN);
- set_async_breakpoint(®s->cp0_epc);
-}
-
-#endif /* CONFIG_KGDB */
-
-static inline int dclz(unsigned long long x)
-{
- int lz;
-
- __asm__ (
- " .set push \n"
- " .set mips64 \n"
- " dclz %0, %1 \n"
- " .set pop \n"
- : "=r" (lz)
- : "r" (x));
-
- return lz;
+ base = A_BCM1480_IMR_MAPPER(cpu);
+ mask_h = __raw_readq(
+ IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H));
+ mask_l = __raw_readq(
+ IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L));
+
+ if (mask_h) {
+ if (mask_h ^ 1)
+ do_IRQ(fls64(mask_h) - 1);
+ else if (mask_l)
+ do_IRQ(63 + fls64(mask_l));
+ }
}
-extern void bcm1480_timer_interrupt(struct pt_regs *regs);
-extern void bcm1480_mailbox_interrupt(struct pt_regs *regs);
-extern void bcm1480_kgdb_interrupt(struct pt_regs *regs);
-
-asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+asmlinkage void plat_irq_dispatch(void)
{
+ unsigned int cpu = smp_processor_id();
unsigned int pending;
#ifdef CONFIG_SIBYTE_BCM1480_PROF
write_c0_compare(read_c0_count());
#endif
- pending = read_c0_cause();
+ pending = read_c0_cause() & read_c0_status();
#ifdef CONFIG_SIBYTE_BCM1480_PROF
if (pending & CAUSEF_IP7) /* Cpu performance counter interrupt */
- sbprof_cpu_intr(exception_epc(regs));
+ sbprof_cpu_intr();
+ else
#endif
if (pending & CAUSEF_IP4)
- bcm1480_timer_interrupt(regs);
-
+ do_IRQ(K_BCM1480_INT_TIMER_0 + cpu);
#ifdef CONFIG_SMP
- if (pending & CAUSEF_IP3)
- bcm1480_mailbox_interrupt(regs);
+ else if (pending & CAUSEF_IP3)
+ bcm1480_mailbox_interrupt();
#endif
-#ifdef CONFIG_KGDB
- if (pending & CAUSEF_IP6)
- bcm1480_kgdb_interrupt(regs); /* KGDB (uart 1) */
-#endif
-
- if (pending & CAUSEF_IP2) {
- unsigned long long mask_h, mask_l;
- unsigned long base;
-
- /*
- * Default...we've hit an IP[2] interrupt, which means we've
- * got to check the 1480 interrupt registers to figure out what
- * to do. Need to detect which CPU we're on, now that
- * smp_affinity is supported.
- */
- base = A_BCM1480_IMR_MAPPER(smp_processor_id());
- mask_h = __raw_readq(
- IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H));
- mask_l = __raw_readq(
- IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L));
-
- if (!mask_h) {
- if (mask_h ^ 1)
- do_IRQ(63 - dclz(mask_h), regs);
- else
- do_IRQ(127 - dclz(mask_l), regs);
- }
- }
+ else if (pending & CAUSEF_IP2)
+ dispatch_ip2();
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff