sparc32, leon: code cleanup of timer/IRQ controller initialization

Cleaned up leon_init_timers() by removing unnecessary double checking
and one indentation level. Changed LEON_IMASK to LEON_IMASK(cpu).

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
index 5d7e41c19362f0e7d9b38aa717fac7211375fdc3..d8fafeacb4961eb42c326f337e4f770fe59c7f21 100644 (file)
--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
@@ -37,7 +37,7 @@ unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
 unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
 int leon3_ticker_irq; /* Timer ticker IRQ */
 unsigned int sparc_leon_eirq;
-#define LEON_IMASK (&leon3_irqctrl_regs->mask[0])
+#define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu])
 #define LEON_IACK (&leon3_irqctrl_regs->iclear)
 #define LEON_DO_ACK_HW 1
 
@@ -79,8 +79,8 @@ void leon_eirq_setup(unsigned int eirq)
         */
        irq_link(veirq);
        mask = 1 << eirq;
-       oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK);
-       LEON3_BYPASS_STORE_PA(LEON_IMASK, (oldmask | mask));
+       oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(0));
+       LEON3_BYPASS_STORE_PA(LEON_IMASK(0), (oldmask | mask));
        sparc_leon_eirq = eirq;
 }
 
@@ -101,23 +101,23 @@ static inline unsigned long get_irqmask(unsigned int irq)
 
 static void leon_unmask_irq(struct irq_data *data)
 {
-       unsigned long mask, flags;
+       unsigned long mask, oldmask, flags;
 
        mask = (unsigned long)data->chip_data;
        spin_lock_irqsave(&leon_irq_lock, flags);
-       LEON3_BYPASS_STORE_PA(LEON_IMASK,
-                             (LEON3_BYPASS_LOAD_PA(LEON_IMASK) | (mask)));
+       oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(0));
+       LEON3_BYPASS_STORE_PA(LEON_IMASK(0), (oldmask | mask));
        spin_unlock_irqrestore(&leon_irq_lock, flags);
 }
 
 static void leon_mask_irq(struct irq_data *data)
 {
-       unsigned long mask, flags;
+       unsigned long mask, oldmask, flags;
 
        mask = (unsigned long)data->chip_data;
        spin_lock_irqsave(&leon_irq_lock, flags);
-       LEON3_BYPASS_STORE_PA(LEON_IMASK,
-                             (LEON3_BYPASS_LOAD_PA(LEON_IMASK) & ~(mask)));
+       oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(0));
+       LEON3_BYPASS_STORE_PA(LEON_IMASK(0), (oldmask & ~mask));
        spin_unlock_irqrestore(&leon_irq_lock, flags);
 }
 
@@ -261,92 +261,83 @@ void __init leon_init_timers(irq_handler_t counter_fn)
                        leon3_gptimer_irq = *(unsigned int *)pp->value;
        } while (0);
 
-       if (leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq) {
-               LEON3_BYPASS_STORE_PA(
-                       &leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
-               LEON3_BYPASS_STORE_PA(
-                       &leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
-                       (((1000000 / HZ) - 1)));
-               LEON3_BYPASS_STORE_PA(
+       if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
+               goto bad;
+
+       LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
+       LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
+                               (((1000000 / HZ) - 1)));
+       LEON3_BYPASS_STORE_PA(
                        &leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
 
 #ifdef CONFIG_SMP
-               leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
-
-               if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
-                     (1<<LEON3_GPTIMER_SEPIRQ))) {
-                       prom_printf("irq timer not configured with separate irqs\n");
-                       BUG();
-               }
+       leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
 
-               LEON3_BYPASS_STORE_PA(
-                       &leon3_gptimer_regs->e[leon3_gptimer_idx+1].val, 0);
-               LEON3_BYPASS_STORE_PA(
-                       &leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
-                       (((1000000/HZ) - 1)));
-               LEON3_BYPASS_STORE_PA(
-                       &leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl, 0);
-# endif
-
-               /*
-                * The IRQ controller may (if implemented) consist of multiple
-                * IRQ controllers, each mapped on a 4Kb boundary.
-                * Each CPU may be routed to different IRQCTRLs, however
-                * we assume that all CPUs (in SMP system) is routed to the
-                * same IRQ Controller, and for non-SMP only one IRQCTRL is
-                * accessed anyway.
-                * In AMP systems, Linux must run on CPU0 for the time being.
-                */
-               cpu = sparc_leon3_cpuid();
-               icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
-               icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
-               leon3_irqctrl_regs += icsel;
-
-               /* Probe extended IRQ controller */
-               eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
-                       >> 16) & 0xf;
-               if (eirq != 0)
-                       leon_eirq_setup(eirq);
-       } else {
-               goto bad;
+       if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
+             (1<<LEON3_GPTIMER_SEPIRQ))) {
+               printk(KERN_ERR "timer not configured with separate irqs\n");
+               BUG();
        }
 
+       LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val,
+                               0);
+       LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
+                               (((1000000/HZ) - 1)));
+       LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
+                               0);
+#endif
+
+       /*
+        * The IRQ controller may (if implemented) consist of multiple
+        * IRQ controllers, each mapped on a 4Kb boundary.
+        * Each CPU may be routed to different IRQCTRLs, however
+        * we assume that all CPUs (in SMP system) is routed to the
+        * same IRQ Controller, and for non-SMP only one IRQCTRL is
+        * accessed anyway.
+        * In AMP systems, Linux must run on CPU0 for the time being.
+        */
+       cpu = sparc_leon3_cpuid();
+       icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
+       icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
+       leon3_irqctrl_regs += icsel;
+
+       /* Probe extended IRQ controller */
+       eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
+               >> 16) & 0xf;
+       if (eirq != 0)
+               leon_eirq_setup(eirq);
+
        irq = _leon_build_device_irq(NULL, leon3_gptimer_irq+leon3_gptimer_idx);
        err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
-
        if (err) {
-               printk(KERN_ERR "leon_time_init: unable to attach IRQ%d\n",
-                      irq);
+               printk(KERN_ERR "unable to attach timer IRQ%d\n", irq);
                prom_halt();
        }
 
-       if (leon3_gptimer_regs) {
-               LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
-                                     LEON3_GPTIMER_EN |
-                                     LEON3_GPTIMER_RL |
-                                     LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
+       LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
+                             LEON3_GPTIMER_EN |
+                             LEON3_GPTIMER_RL |
+                             LEON3_GPTIMER_LD |
+                             LEON3_GPTIMER_IRQEN);
 
 #ifdef CONFIG_SMP
-               /* Install per-cpu IRQ handler for broadcasted ticker */
-               irq = leon_build_device_irq(leon3_ticker_irq,
-                                               handle_percpu_irq, "per-cpu",
-                                               0);
-               err = request_irq(irq, leon_percpu_timer_interrupt,
-                                       IRQF_PERCPU | IRQF_TIMER, "ticker",
-                                       NULL);
-               if (err) {
-                       printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
-                       prom_halt();
-               }
+       /* Install per-cpu IRQ handler for broadcasted ticker */
+       irq = leon_build_device_irq(leon3_ticker_irq, handle_percpu_irq,
+                                   "per-cpu", 0);
+       err = request_irq(irq, leon_percpu_timer_interrupt,
+                         IRQF_PERCPU | IRQF_TIMER, "ticker",
+                         NULL);
+       if (err) {
+               printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
+               prom_halt();
+       }
 
-               LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
-                                     LEON3_GPTIMER_EN |
-                                     LEON3_GPTIMER_RL |
-                                     LEON3_GPTIMER_LD |
-                                     LEON3_GPTIMER_IRQEN);
+       LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
+                             LEON3_GPTIMER_EN |
+                             LEON3_GPTIMER_RL |
+                             LEON3_GPTIMER_LD |
+                             LEON3_GPTIMER_IRQEN);
 #endif
-
-       }
        return;
 bad:
        printk(KERN_ERR "No Timer/irqctrl found\n");
@@ -363,9 +354,6 @@ void leon_load_profile_irq(int cpu, unsigned int limit)
        BUG();
 }
 
-
-
-
 void __init leon_trans_init(struct device_node *dp)
 {
        if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
@@ -420,8 +408,8 @@ void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
        unsigned long mask, flags, *addr;
        mask = get_irqmask(irq_nr);
        spin_lock_irqsave(&leon_irq_lock, flags);
-       addr = (unsigned long *)&(leon3_irqctrl_regs->mask[cpu]);
-       LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | (mask)));
+       addr = (unsigned long *)LEON_IMASK(cpu);
+       LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | mask));
        spin_unlock_irqrestore(&leon_irq_lock, flags);
 }