diff options
author | Daniel Hellstrom <daniel@gaisler.com> | 2011-04-19 23:41:25 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2011-04-21 15:31:31 -0700 |
commit | a481b5d0cb5d1884f16460b4846755518360f1ca (patch) | |
tree | 3a6a73f0adc58e3c218b1d3e081c2d8504d94b57 /arch/sparc/kernel | |
parent | ea044ec3984472a2e8de91e17872868baac62a50 (diff) | |
download | linux-stable-a481b5d0cb5d1884f16460b4846755518360f1ca.tar.gz linux-stable-a481b5d0cb5d1884f16460b4846755518360f1ca.tar.bz2 linux-stable-a481b5d0cb5d1884f16460b4846755518360f1ca.zip |
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>
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r-- | arch/sparc/kernel/leon_kernel.c | 156 |
1 files changed, 72 insertions, 84 deletions
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c index 5d7e41c19362..d8fafeacb496 100644 --- 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); } |