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-rw-r--r--arch/mips/sibyte/bcm1480/irq.c21
-rw-r--r--arch/mips/sibyte/bcm1480/setup.c78
-rw-r--r--arch/mips/sibyte/bcm1480/time.c118
3 files changed, 134 insertions, 83 deletions
diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index e729b5f30264..7aa79bf63c4a 100644
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -289,7 +289,7 @@ int bcm1480_steal_irq(int irq)
if (irq >= BCM1480_NR_IRQS)
return -EINVAL;
- spin_lock_irqsave(&desc->lock,flags);
+ spin_lock_irqsave(&desc->lock, flags);
/* Don't allow sharing at all for these */
if (desc->action != NULL)
retval = -EBUSY;
@@ -297,7 +297,7 @@ int bcm1480_steal_irq(int irq)
desc->action = &bcm1480_dummy_action;
desc->depth = 0;
}
- spin_unlock_irqrestore(&desc->lock,flags);
+ spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
@@ -431,8 +431,8 @@ void __init arch_init_irq(void)
#include <linux/delay.h>
-#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)))
+#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)))
static void bcm1480_kgdb_interrupt(void)
{
@@ -450,7 +450,6 @@ static void bcm1480_kgdb_interrupt(void)
#endif /* CONFIG_KGDB */
-extern void bcm1480_timer_interrupt(void);
extern void bcm1480_mailbox_interrupt(void);
asmlinkage void plat_irq_dispatch(void)
@@ -470,8 +469,16 @@ asmlinkage void plat_irq_dispatch(void)
else
#endif
- if (pending & CAUSEF_IP4)
- bcm1480_timer_interrupt();
+ if (pending & CAUSEF_IP4) {
+ int cpu = smp_processor_id();
+ int irq = K_BCM1480_INT_TIMER_0 + cpu;
+
+ /* Reset the timer */
+ __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS,
+ IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
+
+ do_IRQ(irq);
+ }
#ifdef CONFIG_SMP
else if (pending & CAUSEF_IP3)
diff --git a/arch/mips/sibyte/bcm1480/setup.c b/arch/mips/sibyte/bcm1480/setup.c
index 7e1aa348b8e0..05ed92c92b69 100644
--- a/arch/mips/sibyte/bcm1480/setup.c
+++ b/arch/mips/sibyte/bcm1480/setup.c
@@ -43,16 +43,49 @@ static unsigned int part_type;
static char *soc_str;
static char *pass_str;
-static inline int setup_bcm1x80_bcm1x55(void);
+static int __init setup_bcm1x80_bcm1x55(void)
+{
+ int ret = 0;
+
+ switch (soc_pass) {
+ case K_SYS_REVISION_BCM1480_S0:
+ periph_rev = 1;
+ pass_str = "S0 (pass1)";
+ break;
+ case K_SYS_REVISION_BCM1480_A1:
+ periph_rev = 1;
+ pass_str = "A1 (pass1)";
+ break;
+ case K_SYS_REVISION_BCM1480_A2:
+ periph_rev = 1;
+ pass_str = "A2 (pass1)";
+ break;
+ case K_SYS_REVISION_BCM1480_A3:
+ periph_rev = 1;
+ pass_str = "A3 (pass1)";
+ break;
+ case K_SYS_REVISION_BCM1480_B0:
+ periph_rev = 1;
+ pass_str = "B0 (pass2)";
+ break;
+ default:
+ printk("Unknown %s rev %x\n", soc_str, soc_pass);
+ periph_rev = 1;
+ pass_str = "Unknown Revision";
+ break;
+ }
+
+ return ret;
+}
/* Setup code likely to be common to all SiByte platforms */
-static inline int sys_rev_decode(void)
+static int __init sys_rev_decode(void)
{
int ret = 0;
switch (soc_type) {
- case K_SYS_SOC_TYPE_BCM1x80:
+ case K_SYS_SOC_TYPE_BCM1x80:
if (part_type == K_SYS_PART_BCM1480)
soc_str = "BCM1480";
else if (part_type == K_SYS_PART_BCM1280)
@@ -62,7 +95,7 @@ static inline int sys_rev_decode(void)
ret = setup_bcm1x80_bcm1x55();
break;
- case K_SYS_SOC_TYPE_BCM1x55:
+ case K_SYS_SOC_TYPE_BCM1x55:
if (part_type == K_SYS_PART_BCM1455)
soc_str = "BCM1455";
else if (part_type == K_SYS_PART_BCM1255)
@@ -72,49 +105,16 @@ static inline int sys_rev_decode(void)
ret = setup_bcm1x80_bcm1x55();
break;
- default:
+ default:
printk("Unknown part type %x\n", part_type);
ret = 1;
break;
}
- return ret;
-}
-static inline int setup_bcm1x80_bcm1x55(void)
-{
- int ret = 0;
-
- switch (soc_pass) {
- case K_SYS_REVISION_BCM1480_S0:
- periph_rev = 1;
- pass_str = "S0 (pass1)";
- break;
- case K_SYS_REVISION_BCM1480_A1:
- periph_rev = 1;
- pass_str = "A1 (pass1)";
- break;
- case K_SYS_REVISION_BCM1480_A2:
- periph_rev = 1;
- pass_str = "A2 (pass1)";
- break;
- case K_SYS_REVISION_BCM1480_A3:
- periph_rev = 1;
- pass_str = "A3 (pass1)";
- break;
- case K_SYS_REVISION_BCM1480_B0:
- periph_rev = 1;
- pass_str = "B0 (pass2)";
- break;
- default:
- printk("Unknown %s rev %x\n", soc_str, soc_pass);
- periph_rev = 1;
- pass_str = "Unknown Revision";
- break;
- }
return ret;
}
-void bcm1480_setup(void)
+void __init bcm1480_setup(void)
{
uint64_t sys_rev;
int plldiv;
diff --git a/arch/mips/sibyte/bcm1480/time.c b/arch/mips/sibyte/bcm1480/time.c
index 6f3f71bf4244..40d7126cd5bf 100644
--- a/arch/mips/sibyte/bcm1480/time.c
+++ b/arch/mips/sibyte/bcm1480/time.c
@@ -25,6 +25,7 @@
* code to do general bookkeeping (e.g. update jiffies, run
* bottom halves, etc.)
*/
+#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
@@ -55,15 +56,12 @@
extern int bcm1480_steal_irq(int irq);
-void bcm1480_time_init(void)
+void __init plat_time_init(void)
{
- int cpu = smp_processor_id();
- int irq = K_BCM1480_INT_TIMER_0+cpu;
+ unsigned int cpu = smp_processor_id();
+ unsigned int irq = K_BCM1480_INT_TIMER_0 + cpu;
- /* Only have 4 general purpose timers */
- if (cpu > 3) {
- BUG();
- }
+ BUG_ON(cpu > 3); /* Only have 4 general purpose timers */
bcm1480_mask_irq(cpu, irq);
@@ -71,27 +69,83 @@ void bcm1480_time_init(void)
__raw_writeq(IMR_IP4_VAL, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H)
+ (irq<<3)));
- /* the general purpose timer ticks at 1 Mhz independent of the rest of the system */
- /* Disable the timer and set up the count */
- __raw_writeq(0, IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
- __raw_writeq(
- BCM1480_HPT_VALUE/HZ
- , IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT)));
+ bcm1480_unmask_irq(cpu, irq);
+ bcm1480_steal_irq(irq);
+}
+
+/*
+ * The general purpose timer ticks at 1 Mhz independent if
+ * the rest of the system
+ */
+static void sibyte_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ unsigned int cpu = smp_processor_id();
+ void __iomem *timer_cfg, *timer_init;
+
+ timer_cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
+ timer_init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ __raw_writeq(0, timer_cfg);
+ __raw_writeq(BCM1480_HPT_VALUE / HZ - 1, timer_init);
+ __raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
+ timer_cfg);
+ break;
+
+ case CLOCK_EVT_MODE_ONESHOT:
+ /* Stop the timer until we actually program a shot */
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ __raw_writeq(0, timer_cfg);
+ break;
+
+ case CLOCK_EVT_MODE_UNUSED: /* shuddup gcc */
+ ;
+ }
+}
+
+struct clock_event_device sibyte_hpt_clockevent = {
+ .name = "bcm1480-counter",
+ .features = CLOCK_EVT_FEAT_PERIODIC,
+ .set_mode = sibyte_set_mode,
+ .shift = 32,
+ .irq = 0,
+};
+
+static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
+{
+ struct clock_event_device *cd = &sibyte_hpt_clockevent;
+ unsigned int cpu = smp_processor_id();
- /* Set the timer running */
+ /* Reset the timer */
__raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS,
- IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
+ IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
+ cd->event_handler(cd);
- bcm1480_unmask_irq(cpu, irq);
- bcm1480_steal_irq(irq);
- /*
- * This interrupt is "special" in that it doesn't use the request_irq
- * way to hook the irq line. The timer interrupt is initialized early
- * enough to make this a major pain, and it's also firing enough to
- * warrant a bit of special case code. bcm1480_timer_interrupt is
- * called directly from irq_handler.S when IP[4] is set during an
- * interrupt
- */
+ return IRQ_HANDLED;
+}
+
+static struct irqaction sibyte_counter_irqaction = {
+ .handler = sibyte_counter_handler,
+ .flags = IRQF_DISABLED | IRQF_PERCPU,
+ .name = "timer",
+};
+
+/*
+ * This interrupt is "special" in that it doesn't use the request_irq
+ * way to hook the irq line. The timer interrupt is initialized early
+ * enough to make this a major pain, and it's also firing enough to
+ * warrant a bit of special case code. bcm1480_timer_interrupt is
+ * called directly from irq_handler.S when IP[4] is set during an
+ * interrupt
+ */
+static void __init sb1480_clockevent_init(void)
+{
+ unsigned int cpu = smp_processor_id();
+ unsigned int irq = K_BCM1480_INT_TIMER_0 + cpu;
+
+ setup_irq(irq, &sibyte_counter_irqaction);
}
void bcm1480_timer_interrupt(void)
@@ -103,18 +157,7 @@ void bcm1480_timer_interrupt(void)
__raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS,
IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
- if (cpu == 0) {
- /*
- * CPU 0 handles the global timer interrupt job
- */
- ll_timer_interrupt(irq);
- }
- else {
- /*
- * other CPUs should just do profiling and process accounting
- */
- ll_local_timer_interrupt(irq);
- }
+ ll_timer_interrupt(irq);
}
static cycle_t bcm1480_hpt_read(void)
@@ -129,4 +172,5 @@ void __init bcm1480_hpt_setup(void)
{
clocksource_mips.read = bcm1480_hpt_read;
mips_hpt_frequency = BCM1480_HPT_VALUE;
+ sb1480_clockevent_init();
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.