| /* |
| * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB |
| * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/mutex.h> |
| #include <linux/slab.h> |
| #include <linux/of.h> |
| #include <linux/of_platform.h> |
| #include <linux/interrupt.h> |
| #include <linux/of_device.h> |
| |
| #include <asm/oplib.h> |
| #include <asm/timer.h> |
| #include <asm/prom.h> |
| #include <asm/leon.h> |
| #include <asm/leon_amba.h> |
| #include <asm/traps.h> |
| #include <asm/cacheflush.h> |
| |
| #include "prom.h" |
| #include "irq.h" |
| |
| struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address, initialized by amba_init() */ |
| struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address, initialized by amba_init() */ |
| struct amba_apb_device leon_percpu_timer_dev[16]; |
| |
| int leondebug_irq_disable; |
| int leon_debug_irqout; |
| static int dummy_master_l10_counter; |
| |
| unsigned long leon3_gptimer_irq; /* interrupt controller irq number, initialized by amba_init() */ |
| unsigned int sparc_leon_eirq; |
| #define LEON_IMASK ((&leon3_irqctrl_regs->mask[0])) |
| |
| /* Return the IRQ of the pending IRQ on the extended IRQ controller */ |
| int sparc_leon_eirq_get(int eirq, int cpu) |
| { |
| return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f; |
| } |
| |
| irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id) |
| { |
| printk(KERN_ERR "sparc_leon_eirq_isr: ERROR EXTENDED IRQ\n"); |
| return IRQ_HANDLED; |
| } |
| |
| /* The extended IRQ controller has been found, this function registers it */ |
| void sparc_leon_eirq_register(int eirq) |
| { |
| int irq; |
| |
| /* Register a "BAD" handler for this interrupt, it should never happen */ |
| irq = request_irq(eirq, sparc_leon_eirq_isr, |
| (IRQF_DISABLED | SA_STATIC_ALLOC), "extirq", NULL); |
| |
| if (irq) { |
| printk(KERN_ERR |
| "sparc_leon_eirq_register: unable to attach IRQ%d\n", |
| eirq); |
| } else { |
| sparc_leon_eirq = eirq; |
| } |
| |
| } |
| |
| static inline unsigned long get_irqmask(unsigned int irq) |
| { |
| unsigned long mask; |
| |
| if (!irq || ((irq > 0xf) && !sparc_leon_eirq) |
| || ((irq > 0x1f) && sparc_leon_eirq)) { |
| printk(KERN_ERR |
| "leon_get_irqmask: false irq number: %d\n", irq); |
| mask = 0; |
| } else { |
| mask = LEON_HARD_INT(irq); |
| } |
| return mask; |
| } |
| |
| static void leon_enable_irq(unsigned int irq_nr) |
| { |
| unsigned long mask, flags; |
| mask = get_irqmask(irq_nr); |
| local_irq_save(flags); |
| LEON3_BYPASS_STORE_PA(LEON_IMASK, |
| (LEON3_BYPASS_LOAD_PA(LEON_IMASK) | (mask))); |
| local_irq_restore(flags); |
| } |
| |
| static void leon_disable_irq(unsigned int irq_nr) |
| { |
| unsigned long mask, flags; |
| mask = get_irqmask(irq_nr); |
| local_irq_save(flags); |
| LEON3_BYPASS_STORE_PA(LEON_IMASK, |
| (LEON3_BYPASS_LOAD_PA(LEON_IMASK) & ~(mask))); |
| local_irq_restore(flags); |
| |
| } |
| |
| void __init leon_init_timers(irq_handler_t counter_fn) |
| { |
| int irq; |
| |
| leondebug_irq_disable = 0; |
| leon_debug_irqout = 0; |
| master_l10_counter = (unsigned int *)&dummy_master_l10_counter; |
| dummy_master_l10_counter = 0; |
| |
| if (leon3_gptimer_regs && leon3_irqctrl_regs) { |
| LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0); |
| LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld, |
| (((1000000 / 100) - 1))); |
| LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, 0); |
| |
| #ifdef CONFIG_SMP |
| leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs; |
| leon_percpu_timer_dev[0].irq = leon3_gptimer_irq+1; |
| |
| 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_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].val, 0); |
| LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].rld, (((1000000/100) - 1))); |
| LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, 0); |
| # endif |
| |
| } else { |
| printk(KERN_ERR "No Timer/irqctrl found\n"); |
| BUG(); |
| } |
| |
| irq = request_irq(leon3_gptimer_irq, |
| counter_fn, |
| (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL); |
| |
| if (irq) { |
| printk(KERN_ERR "leon_time_init: unable to attach IRQ%d\n", |
| LEON_INTERRUPT_TIMER1); |
| prom_halt(); |
| } |
| |
| # ifdef CONFIG_SMP |
| { |
| unsigned long flags; |
| struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_percpu_timer_dev[0].irq - 1)]; |
| |
| /* For SMP we use the level 14 ticker, however the bootup code |
| * has copied the firmwares level 14 vector into boot cpu's |
| * trap table, we must fix this now or we get squashed. |
| */ |
| local_irq_save(flags); |
| |
| patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */ |
| |
| /* Adjust so that we jump directly to smpleon_ticker */ |
| trap_table->inst_three += smpleon_ticker - real_irq_entry; |
| |
| local_flush_cache_all(); |
| local_irq_restore(flags); |
| } |
| # endif |
| |
| if (leon3_gptimer_regs) { |
| LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, |
| LEON3_GPTIMER_EN | |
| LEON3_GPTIMER_RL | |
| LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN); |
| |
| #ifdef CONFIG_SMP |
| LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, |
| LEON3_GPTIMER_EN | |
| LEON3_GPTIMER_RL | |
| LEON3_GPTIMER_LD | |
| LEON3_GPTIMER_IRQEN); |
| #endif |
| |
| } |
| } |
| |
| void leon_clear_clock_irq(void) |
| { |
| } |
| |
| 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) { |
| struct property *p; |
| p = of_find_property(dp, "mid", (void *)0); |
| if (p) { |
| int mid; |
| dp->name = prom_early_alloc(5 + 1); |
| memcpy(&mid, p->value, p->length); |
| sprintf((char *)dp->name, "cpu%.2d", mid); |
| } |
| } |
| } |
| |
| void __initdata (*prom_amba_init)(struct device_node *dp, struct device_node ***nextp) = 0; |
| |
| void __init leon_node_init(struct device_node *dp, struct device_node ***nextp) |
| { |
| if (prom_amba_init && |
| strcmp(dp->type, "ambapp") == 0 && |
| strcmp(dp->name, "ambapp0") == 0) { |
| prom_amba_init(dp, nextp); |
| } |
| } |
| |
| #ifdef CONFIG_SMP |
| |
| void leon_set_cpu_int(int cpu, int level) |
| { |
| unsigned long mask; |
| mask = get_irqmask(level); |
| LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask); |
| } |
| |
| static void leon_clear_ipi(int cpu, int level) |
| { |
| unsigned long mask; |
| mask = get_irqmask(level); |
| LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask<<16); |
| } |
| |
| static void leon_set_udt(int cpu) |
| { |
| } |
| |
| void leon_clear_profile_irq(int cpu) |
| { |
| } |
| |
| void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu) |
| { |
| unsigned long mask, flags, *addr; |
| mask = get_irqmask(irq_nr); |
| local_irq_save(flags); |
| addr = (unsigned long *)&(leon3_irqctrl_regs->mask[cpu]); |
| LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | (mask))); |
| local_irq_restore(flags); |
| } |
| |
| #endif |
| |
| void __init leon_init_IRQ(void) |
| { |
| sparc_init_timers = leon_init_timers; |
| |
| BTFIXUPSET_CALL(enable_irq, leon_enable_irq, BTFIXUPCALL_NORM); |
| BTFIXUPSET_CALL(disable_irq, leon_disable_irq, BTFIXUPCALL_NORM); |
| BTFIXUPSET_CALL(enable_pil_irq, leon_enable_irq, BTFIXUPCALL_NORM); |
| BTFIXUPSET_CALL(disable_pil_irq, leon_disable_irq, BTFIXUPCALL_NORM); |
| |
| BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq, |
| BTFIXUPCALL_NORM); |
| BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq, |
| BTFIXUPCALL_NOP); |
| |
| #ifdef CONFIG_SMP |
| BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM); |
| BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM); |
| BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM); |
| #endif |
| |
| } |
| |
| void __init leon_init(void) |
| { |
| prom_build_more = &leon_node_init; |
| } |