diff options
Diffstat (limited to 'arch/sparc/kernel/leon_kernel.c')
| -rw-r--r-- | arch/sparc/kernel/leon_kernel.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c new file mode 100644 index 000000000000..54d8a5bd4824 --- /dev/null +++ b/arch/sparc/kernel/leon_kernel.c @@ -0,0 +1,203 @@ +/* + * 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 "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); + + } 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(); + } + + 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); + } +} + +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); + } +} + +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; +} |