2 * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
3 * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/errno.h>
9 #include <linux/mutex.h>
11 #include <linux/of_platform.h>
12 #include <linux/interrupt.h>
13 #include <linux/of_device.h>
15 #include <asm/oplib.h>
16 #include <asm/timer.h>
19 #include <asm/leon_amba.h>
20 #include <asm/traps.h>
21 #include <asm/cacheflush.h>
26 struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */
27 struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */
28 struct amba_apb_device leon_percpu_timer_dev[16];
30 int leondebug_irq_disable;
31 int leon_debug_irqout;
32 static int dummy_master_l10_counter;
34 unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
35 unsigned int sparc_leon_eirq;
36 #define LEON_IMASK ((&leon3_irqctrl_regs->mask[0]))
38 /* Return the IRQ of the pending IRQ on the extended IRQ controller */
39 int sparc_leon_eirq_get(int eirq, int cpu)
41 return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
44 irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id)
46 printk(KERN_ERR "sparc_leon_eirq_isr: ERROR EXTENDED IRQ\n");
50 /* The extended IRQ controller has been found, this function registers it */
51 void sparc_leon_eirq_register(int eirq)
55 /* Register a "BAD" handler for this interrupt, it should never happen */
56 irq = request_irq(eirq, sparc_leon_eirq_isr,
57 (IRQF_DISABLED | SA_STATIC_ALLOC), "extirq", NULL);
61 "sparc_leon_eirq_register: unable to attach IRQ%d\n",
64 sparc_leon_eirq = eirq;
69 static inline unsigned long get_irqmask(unsigned int irq)
73 if (!irq || ((irq > 0xf) && !sparc_leon_eirq)
74 || ((irq > 0x1f) && sparc_leon_eirq)) {
76 "leon_get_irqmask: false irq number: %d\n", irq);
79 mask = LEON_HARD_INT(irq);
84 static void leon_enable_irq(unsigned int irq_nr)
86 unsigned long mask, flags;
87 mask = get_irqmask(irq_nr);
88 local_irq_save(flags);
89 LEON3_BYPASS_STORE_PA(LEON_IMASK,
90 (LEON3_BYPASS_LOAD_PA(LEON_IMASK) | (mask)));
91 local_irq_restore(flags);
94 static void leon_disable_irq(unsigned int irq_nr)
96 unsigned long mask, flags;
97 mask = get_irqmask(irq_nr);
98 local_irq_save(flags);
99 LEON3_BYPASS_STORE_PA(LEON_IMASK,
100 (LEON3_BYPASS_LOAD_PA(LEON_IMASK) & ~(mask)));
101 local_irq_restore(flags);
105 void __init leon_init_timers(irq_handler_t counter_fn)
108 struct device_node *rootnp, *np;
113 leondebug_irq_disable = 0;
114 leon_debug_irqout = 0;
115 master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
116 dummy_master_l10_counter = 0;
118 /*Find IRQMP IRQ Controller Registers base address otherwise bail out.*/
119 rootnp = of_find_node_by_path("/ambapp0");
122 np = of_find_node_by_name(rootnp, "GAISLER_IRQMP");
125 pp = of_find_property(np, "reg", &len);
128 leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value;
130 /* Find GPTIMER Timer Registers base address otherwise bail out. */
131 np = of_find_node_by_name(rootnp, "GAISLER_GPTIMER");
134 pp = of_find_property(np, "reg", &len);
137 leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)pp->value;
138 pp = of_find_property(np, "interrupts", &len);
141 leon3_gptimer_irq = *(unsigned int *)pp->value;
143 if (leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq) {
144 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0);
145 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld,
146 (((1000000 / HZ) - 1)));
147 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, 0);
150 leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs;
151 leon_percpu_timer_dev[0].irq = leon3_gptimer_irq+1;
153 if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
154 (1<<LEON3_GPTIMER_SEPIRQ))) {
155 prom_printf("irq timer not configured with separate irqs\n");
159 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].val, 0);
160 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].rld, (((1000000/HZ) - 1)));
161 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, 0);
165 * The IRQ controller may (if implemented) consist of multiple
166 * IRQ controllers, each mapped on a 4Kb boundary.
167 * Each CPU may be routed to different IRQCTRLs, however
168 * we assume that all CPUs (in SMP system) is routed to the
169 * same IRQ Controller, and for non-SMP only one IRQCTRL is
171 * In AMP systems, Linux must run on CPU0 for the time being.
173 cpu = sparc_leon3_cpuid();
174 icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
175 icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
176 leon3_irqctrl_regs += icsel;
181 irq = request_irq(leon3_gptimer_irq,
183 (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
186 printk(KERN_ERR "leon_time_init: unable to attach IRQ%d\n",
187 LEON_INTERRUPT_TIMER1);
194 struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_percpu_timer_dev[0].irq - 1)];
196 /* For SMP we use the level 14 ticker, however the bootup code
197 * has copied the firmwares level 14 vector into boot cpu's
198 * trap table, we must fix this now or we get squashed.
200 local_irq_save(flags);
202 patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
204 /* Adjust so that we jump directly to smpleon_ticker */
205 trap_table->inst_three += smpleon_ticker - real_irq_entry;
207 local_flush_cache_all();
208 local_irq_restore(flags);
212 if (leon3_gptimer_regs) {
213 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl,
216 LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
219 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl,
223 LEON3_GPTIMER_IRQEN);
229 printk(KERN_ERR "No Timer/irqctrl found\n");
234 void leon_clear_clock_irq(void)
238 void leon_load_profile_irq(int cpu, unsigned int limit)
246 void __init leon_trans_init(struct device_node *dp)
248 if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
250 p = of_find_property(dp, "mid", (void *)0);
253 dp->name = prom_early_alloc(5 + 1);
254 memcpy(&mid, p->value, p->length);
255 sprintf((char *)dp->name, "cpu%.2d", mid);
260 void __initdata (*prom_amba_init)(struct device_node *dp, struct device_node ***nextp) = 0;
262 void __init leon_node_init(struct device_node *dp, struct device_node ***nextp)
264 if (prom_amba_init &&
265 strcmp(dp->type, "ambapp") == 0 &&
266 strcmp(dp->name, "ambapp0") == 0) {
267 prom_amba_init(dp, nextp);
273 void leon_set_cpu_int(int cpu, int level)
276 mask = get_irqmask(level);
277 LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask);
280 static void leon_clear_ipi(int cpu, int level)
283 mask = get_irqmask(level);
284 LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask<<16);
287 static void leon_set_udt(int cpu)
291 void leon_clear_profile_irq(int cpu)
295 void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
297 unsigned long mask, flags, *addr;
298 mask = get_irqmask(irq_nr);
299 local_irq_save(flags);
300 addr = (unsigned long *)&(leon3_irqctrl_regs->mask[cpu]);
301 LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | (mask)));
302 local_irq_restore(flags);
307 void __init leon_init_IRQ(void)
309 sparc_init_timers = leon_init_timers;
311 BTFIXUPSET_CALL(enable_irq, leon_enable_irq, BTFIXUPCALL_NORM);
312 BTFIXUPSET_CALL(disable_irq, leon_disable_irq, BTFIXUPCALL_NORM);
313 BTFIXUPSET_CALL(enable_pil_irq, leon_enable_irq, BTFIXUPCALL_NORM);
314 BTFIXUPSET_CALL(disable_pil_irq, leon_disable_irq, BTFIXUPCALL_NORM);
316 BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
318 BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq,
322 BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM);
323 BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM);
324 BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM);
329 void __init leon_init(void)
331 of_pdt_build_more = &leon_node_init;