Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB |
| 3 | * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB |
| 4 | */ |
| 5 | |
| 6 | #include <linux/kernel.h> |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 7 | #include <linux/errno.h> |
| 8 | #include <linux/mutex.h> |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 9 | #include <linux/of.h> |
| 10 | #include <linux/of_platform.h> |
| 11 | #include <linux/interrupt.h> |
| 12 | #include <linux/of_device.h> |
Tkhai Kirill | 62f0828 | 2012-04-04 21:49:26 +0200 | [diff] [blame] | 13 | #include <linux/clocksource.h> |
| 14 | #include <linux/clockchips.h> |
Konrad Eisele | 8401707 | 2009-08-31 22:08:13 +0000 | [diff] [blame] | 15 | |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 16 | #include <asm/oplib.h> |
| 17 | #include <asm/timer.h> |
| 18 | #include <asm/prom.h> |
| 19 | #include <asm/leon.h> |
| 20 | #include <asm/leon_amba.h> |
Konrad Eisele | 8401707 | 2009-08-31 22:08:13 +0000 | [diff] [blame] | 21 | #include <asm/traps.h> |
| 22 | #include <asm/cacheflush.h> |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 23 | #include <asm/smp.h> |
Daniel Hellstrom | 01dae0f | 2011-04-21 04:20:24 +0000 | [diff] [blame] | 24 | #include <asm/setup.h> |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 25 | |
Sam Ravnborg | 93bb32f | 2012-05-25 21:20:12 +0000 | [diff] [blame] | 26 | #include "kernel.h" |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 27 | #include "prom.h" |
| 28 | #include "irq.h" |
| 29 | |
Daniel Hellstrom | 53aea7c | 2011-01-04 01:41:29 +0000 | [diff] [blame] | 30 | struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */ |
| 31 | struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */ |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 32 | |
| 33 | int leondebug_irq_disable; |
| 34 | int leon_debug_irqout; |
Sam Ravnborg | fcea8b2 | 2014-05-16 23:25:44 +0200 | [diff] [blame] | 35 | static volatile u32 dummy_master_l10_counter; |
Daniel Hellstrom | 7279b82 | 2011-01-27 01:26:58 +0000 | [diff] [blame] | 36 | unsigned long amba_system_id; |
Daniel Hellstrom | d61a38b | 2011-04-19 23:41:21 +0000 | [diff] [blame] | 37 | static DEFINE_SPINLOCK(leon_irq_lock); |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 38 | |
Sam Ravnborg | 4007b65 | 2014-04-21 21:39:40 +0200 | [diff] [blame] | 39 | static unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */ |
Andreas Larsson | 384859d | 2014-08-29 17:09:18 +0200 | [diff] [blame] | 40 | static unsigned long leon3_gptimer_ackmask; /* For clearing pending bit */ |
Daniel Hellstrom | 53aea7c | 2011-01-04 01:41:29 +0000 | [diff] [blame] | 41 | unsigned long leon3_gptimer_irq; /* interrupt controller irq number */ |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 42 | unsigned int sparc_leon_eirq; |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 43 | #define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu]) |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 44 | #define LEON_IACK (&leon3_irqctrl_regs->iclear) |
| 45 | #define LEON_DO_ACK_HW 1 |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 46 | |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 47 | /* Return the last ACKed IRQ by the Extended IRQ controller. It has already |
| 48 | * been (automatically) ACKed when the CPU takes the trap. |
| 49 | */ |
| 50 | static inline unsigned int leon_eirq_get(int cpu) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 51 | { |
| 52 | return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f; |
| 53 | } |
| 54 | |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 55 | /* Handle one or multiple IRQs from the extended interrupt controller */ |
| 56 | static void leon_handle_ext_irq(unsigned int irq, struct irq_desc *desc) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 57 | { |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 58 | unsigned int eirq; |
Andreas Larsson | 20424d8 | 2012-10-30 00:09:46 +0000 | [diff] [blame] | 59 | struct irq_bucket *p; |
Daniel Hellstrom | 01dae0f | 2011-04-21 04:20:24 +0000 | [diff] [blame] | 60 | int cpu = sparc_leon3_cpuid(); |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 61 | |
| 62 | eirq = leon_eirq_get(cpu); |
Andreas Larsson | 20424d8 | 2012-10-30 00:09:46 +0000 | [diff] [blame] | 63 | p = irq_map[eirq]; |
| 64 | if ((eirq & 0x10) && p && p->irq) /* bit4 tells if IRQ happened */ |
| 65 | generic_handle_irq(p->irq); |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | /* The extended IRQ controller has been found, this function registers it */ |
Sam Ravnborg | 4007b65 | 2014-04-21 21:39:40 +0200 | [diff] [blame] | 69 | static void leon_eirq_setup(unsigned int eirq) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 70 | { |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 71 | unsigned long mask, oldmask; |
| 72 | unsigned int veirq; |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 73 | |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 74 | if (eirq < 1 || eirq > 0xf) { |
| 75 | printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq); |
| 76 | return; |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 77 | } |
| 78 | |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 79 | veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0); |
| 80 | |
| 81 | /* |
| 82 | * Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ |
| 83 | * controller have a mask-bit of their own, so this is safe. |
| 84 | */ |
| 85 | irq_link(veirq); |
| 86 | mask = 1 << eirq; |
Daniel Hellstrom | 01dae0f | 2011-04-21 04:20:24 +0000 | [diff] [blame] | 87 | oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(boot_cpu_id)); |
| 88 | LEON3_BYPASS_STORE_PA(LEON_IMASK(boot_cpu_id), (oldmask | mask)); |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 89 | sparc_leon_eirq = eirq; |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 90 | } |
| 91 | |
Sam Ravnborg | 4ba22b1 | 2012-05-14 15:14:36 +0200 | [diff] [blame] | 92 | unsigned long leon_get_irqmask(unsigned int irq) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 93 | { |
| 94 | unsigned long mask; |
| 95 | |
| 96 | if (!irq || ((irq > 0xf) && !sparc_leon_eirq) |
| 97 | || ((irq > 0x1f) && sparc_leon_eirq)) { |
| 98 | printk(KERN_ERR |
| 99 | "leon_get_irqmask: false irq number: %d\n", irq); |
| 100 | mask = 0; |
| 101 | } else { |
| 102 | mask = LEON_HARD_INT(irq); |
| 103 | } |
| 104 | return mask; |
| 105 | } |
| 106 | |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 107 | #ifdef CONFIG_SMP |
| 108 | static int irq_choose_cpu(const struct cpumask *affinity) |
| 109 | { |
| 110 | cpumask_t mask; |
| 111 | |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 112 | cpumask_and(&mask, cpu_online_mask, affinity); |
| 113 | if (cpumask_equal(&mask, cpu_online_mask) || cpumask_empty(&mask)) |
Daniel Hellstrom | 01dae0f | 2011-04-21 04:20:24 +0000 | [diff] [blame] | 114 | return boot_cpu_id; |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 115 | else |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 116 | return cpumask_first(&mask); |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 117 | } |
| 118 | #else |
Daniel Hellstrom | 01dae0f | 2011-04-21 04:20:24 +0000 | [diff] [blame] | 119 | #define irq_choose_cpu(affinity) boot_cpu_id |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 120 | #endif |
| 121 | |
| 122 | static int leon_set_affinity(struct irq_data *data, const struct cpumask *dest, |
| 123 | bool force) |
| 124 | { |
| 125 | unsigned long mask, oldmask, flags; |
| 126 | int oldcpu, newcpu; |
| 127 | |
| 128 | mask = (unsigned long)data->chip_data; |
| 129 | oldcpu = irq_choose_cpu(data->affinity); |
| 130 | newcpu = irq_choose_cpu(dest); |
| 131 | |
| 132 | if (oldcpu == newcpu) |
| 133 | goto out; |
| 134 | |
| 135 | /* unmask on old CPU first before enabling on the selected CPU */ |
| 136 | spin_lock_irqsave(&leon_irq_lock, flags); |
| 137 | oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(oldcpu)); |
| 138 | LEON3_BYPASS_STORE_PA(LEON_IMASK(oldcpu), (oldmask & ~mask)); |
| 139 | oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(newcpu)); |
| 140 | LEON3_BYPASS_STORE_PA(LEON_IMASK(newcpu), (oldmask | mask)); |
| 141 | spin_unlock_irqrestore(&leon_irq_lock, flags); |
| 142 | out: |
| 143 | return IRQ_SET_MASK_OK; |
| 144 | } |
| 145 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 146 | static void leon_unmask_irq(struct irq_data *data) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 147 | { |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 148 | unsigned long mask, oldmask, flags; |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 149 | int cpu; |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 150 | |
| 151 | mask = (unsigned long)data->chip_data; |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 152 | cpu = irq_choose_cpu(data->affinity); |
Daniel Hellstrom | d61a38b | 2011-04-19 23:41:21 +0000 | [diff] [blame] | 153 | spin_lock_irqsave(&leon_irq_lock, flags); |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 154 | oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu)); |
| 155 | LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask | mask)); |
Daniel Hellstrom | d61a38b | 2011-04-19 23:41:21 +0000 | [diff] [blame] | 156 | spin_unlock_irqrestore(&leon_irq_lock, flags); |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 157 | } |
| 158 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 159 | static void leon_mask_irq(struct irq_data *data) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 160 | { |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 161 | unsigned long mask, oldmask, flags; |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 162 | int cpu; |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 163 | |
| 164 | mask = (unsigned long)data->chip_data; |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 165 | cpu = irq_choose_cpu(data->affinity); |
Daniel Hellstrom | d61a38b | 2011-04-19 23:41:21 +0000 | [diff] [blame] | 166 | spin_lock_irqsave(&leon_irq_lock, flags); |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 167 | oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu)); |
| 168 | LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask & ~mask)); |
Daniel Hellstrom | d61a38b | 2011-04-19 23:41:21 +0000 | [diff] [blame] | 169 | spin_unlock_irqrestore(&leon_irq_lock, flags); |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 170 | } |
| 171 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 172 | static unsigned int leon_startup_irq(struct irq_data *data) |
| 173 | { |
| 174 | irq_link(data->irq); |
| 175 | leon_unmask_irq(data); |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static void leon_shutdown_irq(struct irq_data *data) |
| 180 | { |
| 181 | leon_mask_irq(data); |
| 182 | irq_unlink(data->irq); |
| 183 | } |
| 184 | |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 185 | /* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */ |
| 186 | static void leon_eoi_irq(struct irq_data *data) |
| 187 | { |
| 188 | unsigned long mask = (unsigned long)data->chip_data; |
| 189 | |
| 190 | if (mask & LEON_DO_ACK_HW) |
| 191 | LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW); |
| 192 | } |
| 193 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 194 | static struct irq_chip leon_irq = { |
Daniel Hellstrom | 5eb1f4fc | 2011-04-19 23:41:26 +0000 | [diff] [blame] | 195 | .name = "leon", |
| 196 | .irq_startup = leon_startup_irq, |
| 197 | .irq_shutdown = leon_shutdown_irq, |
| 198 | .irq_mask = leon_mask_irq, |
| 199 | .irq_unmask = leon_unmask_irq, |
| 200 | .irq_eoi = leon_eoi_irq, |
| 201 | .irq_set_affinity = leon_set_affinity, |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 202 | }; |
| 203 | |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 204 | /* |
| 205 | * Build a LEON IRQ for the edge triggered LEON IRQ controller: |
| 206 | * Edge (normal) IRQ - handle_simple_irq, ack=DONT-CARE, never ack |
| 207 | * Level IRQ (PCI|Level-GPIO) - handle_fasteoi_irq, ack=1, ack after ISR |
| 208 | * Per-CPU Edge - handle_percpu_irq, ack=0 |
| 209 | */ |
| 210 | unsigned int leon_build_device_irq(unsigned int real_irq, |
| 211 | irq_flow_handler_t flow_handler, |
| 212 | const char *name, int do_ack) |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 213 | { |
| 214 | unsigned int irq; |
| 215 | unsigned long mask; |
Andreas Larsson | 6e4741e7 | 2013-04-21 21:23:06 +0000 | [diff] [blame] | 216 | struct irq_desc *desc; |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 217 | |
| 218 | irq = 0; |
Sam Ravnborg | 4ba22b1 | 2012-05-14 15:14:36 +0200 | [diff] [blame] | 219 | mask = leon_get_irqmask(real_irq); |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 220 | if (mask == 0) |
| 221 | goto out; |
| 222 | |
| 223 | irq = irq_alloc(real_irq, real_irq); |
| 224 | if (irq == 0) |
| 225 | goto out; |
| 226 | |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 227 | if (do_ack) |
| 228 | mask |= LEON_DO_ACK_HW; |
| 229 | |
Andreas Larsson | 6e4741e7 | 2013-04-21 21:23:06 +0000 | [diff] [blame] | 230 | desc = irq_to_desc(irq); |
| 231 | if (!desc || !desc->handle_irq || desc->handle_irq == handle_bad_irq) { |
| 232 | irq_set_chip_and_handler_name(irq, &leon_irq, |
| 233 | flow_handler, name); |
| 234 | irq_set_chip_data(irq, (void *)mask); |
| 235 | } |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 236 | |
| 237 | out: |
| 238 | return irq; |
| 239 | } |
| 240 | |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 241 | static unsigned int _leon_build_device_irq(struct platform_device *op, |
| 242 | unsigned int real_irq) |
| 243 | { |
| 244 | return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0); |
| 245 | } |
| 246 | |
Daniel Hellstrom | 5d07b78 | 2011-05-23 21:04:48 +0000 | [diff] [blame] | 247 | void leon_update_virq_handling(unsigned int virq, |
| 248 | irq_flow_handler_t flow_handler, |
| 249 | const char *name, int do_ack) |
| 250 | { |
| 251 | unsigned long mask = (unsigned long)irq_get_chip_data(virq); |
| 252 | |
| 253 | mask &= ~LEON_DO_ACK_HW; |
| 254 | if (do_ack) |
| 255 | mask |= LEON_DO_ACK_HW; |
| 256 | |
| 257 | irq_set_chip_and_handler_name(virq, &leon_irq, |
| 258 | flow_handler, name); |
| 259 | irq_set_chip_data(virq, (void *)mask); |
| 260 | } |
| 261 | |
Tkhai Kirill | 62f0828 | 2012-04-04 21:49:26 +0200 | [diff] [blame] | 262 | static u32 leon_cycles_offset(void) |
| 263 | { |
Andreas Larsson | 384859d | 2014-08-29 17:09:18 +0200 | [diff] [blame] | 264 | u32 rld, val, ctrl, off; |
| 265 | |
Tkhai Kirill | 62f0828 | 2012-04-04 21:49:26 +0200 | [diff] [blame] | 266 | rld = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld); |
| 267 | val = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val); |
Andreas Larsson | 384859d | 2014-08-29 17:09:18 +0200 | [diff] [blame] | 268 | ctrl = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl); |
| 269 | if (LEON3_GPTIMER_CTRL_ISPENDING(ctrl)) { |
| 270 | val = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val); |
| 271 | off = 2 * rld - val; |
| 272 | } else { |
| 273 | off = rld - val; |
| 274 | } |
| 275 | |
| 276 | return off; |
Tkhai Kirill | 62f0828 | 2012-04-04 21:49:26 +0200 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | #ifdef CONFIG_SMP |
| 280 | |
| 281 | /* smp clockevent irq */ |
Sam Ravnborg | 4007b65 | 2014-04-21 21:39:40 +0200 | [diff] [blame] | 282 | static irqreturn_t leon_percpu_timer_ce_interrupt(int irq, void *unused) |
Tkhai Kirill | 62f0828 | 2012-04-04 21:49:26 +0200 | [diff] [blame] | 283 | { |
| 284 | struct clock_event_device *ce; |
| 285 | int cpu = smp_processor_id(); |
| 286 | |
| 287 | leon_clear_profile_irq(cpu); |
| 288 | |
Andreas Larsson | 1ffbc51 | 2013-06-10 08:53:28 +0200 | [diff] [blame] | 289 | if (cpu == boot_cpu_id) |
| 290 | timer_interrupt(irq, NULL); |
| 291 | |
Tkhai Kirill | 62f0828 | 2012-04-04 21:49:26 +0200 | [diff] [blame] | 292 | ce = &per_cpu(sparc32_clockevent, cpu); |
| 293 | |
| 294 | irq_enter(); |
| 295 | if (ce->event_handler) |
| 296 | ce->event_handler(ce); |
| 297 | irq_exit(); |
| 298 | |
| 299 | return IRQ_HANDLED; |
| 300 | } |
| 301 | |
| 302 | #endif /* CONFIG_SMP */ |
| 303 | |
| 304 | void __init leon_init_timers(void) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 305 | { |
Daniel Hellstrom | 4c6773c | 2011-04-19 23:41:22 +0000 | [diff] [blame] | 306 | int irq, eirq; |
Daniel Hellstrom | 2791c1a | 2011-01-04 01:41:32 +0000 | [diff] [blame] | 307 | struct device_node *rootnp, *np, *nnp; |
Daniel Hellstrom | 53aea7c | 2011-01-04 01:41:29 +0000 | [diff] [blame] | 308 | struct property *pp; |
| 309 | int len; |
Daniel Hellstrom | 01dae0f | 2011-04-21 04:20:24 +0000 | [diff] [blame] | 310 | int icsel; |
Daniel Hellstrom | 2791c1a | 2011-01-04 01:41:32 +0000 | [diff] [blame] | 311 | int ampopts; |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 312 | int err; |
Andreas Larsson | 1ffbc51 | 2013-06-10 08:53:28 +0200 | [diff] [blame] | 313 | u32 config; |
Andreas Larsson | 384859d | 2014-08-29 17:09:18 +0200 | [diff] [blame] | 314 | u32 ctrl; |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 315 | |
Tkhai Kirill | 62f0828 | 2012-04-04 21:49:26 +0200 | [diff] [blame] | 316 | sparc_config.get_cycles_offset = leon_cycles_offset; |
| 317 | sparc_config.cs_period = 1000000 / HZ; |
| 318 | sparc_config.features |= FEAT_L10_CLOCKSOURCE; |
| 319 | |
| 320 | #ifndef CONFIG_SMP |
| 321 | sparc_config.features |= FEAT_L10_CLOCKEVENT; |
| 322 | #endif |
| 323 | |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 324 | leondebug_irq_disable = 0; |
| 325 | leon_debug_irqout = 0; |
Sam Ravnborg | fcea8b2 | 2014-05-16 23:25:44 +0200 | [diff] [blame] | 326 | master_l10_counter = (u32 __iomem *)&dummy_master_l10_counter; |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 327 | dummy_master_l10_counter = 0; |
| 328 | |
Daniel Hellstrom | 53aea7c | 2011-01-04 01:41:29 +0000 | [diff] [blame] | 329 | rootnp = of_find_node_by_path("/ambapp0"); |
| 330 | if (!rootnp) |
| 331 | goto bad; |
Daniel Hellstrom | 7279b82 | 2011-01-27 01:26:58 +0000 | [diff] [blame] | 332 | |
| 333 | /* Find System ID: GRLIB build ID and optional CHIP ID */ |
| 334 | pp = of_find_property(rootnp, "systemid", &len); |
| 335 | if (pp) |
| 336 | amba_system_id = *(unsigned long *)pp->value; |
| 337 | |
| 338 | /* Find IRQMP IRQ Controller Registers base adr otherwise bail out */ |
Daniel Hellstrom | 53aea7c | 2011-01-04 01:41:29 +0000 | [diff] [blame] | 339 | np = of_find_node_by_name(rootnp, "GAISLER_IRQMP"); |
Daniel Hellstrom | 9742e72 | 2011-01-04 01:41:31 +0000 | [diff] [blame] | 340 | if (!np) { |
| 341 | np = of_find_node_by_name(rootnp, "01_00d"); |
| 342 | if (!np) |
| 343 | goto bad; |
| 344 | } |
Daniel Hellstrom | 53aea7c | 2011-01-04 01:41:29 +0000 | [diff] [blame] | 345 | pp = of_find_property(np, "reg", &len); |
| 346 | if (!pp) |
| 347 | goto bad; |
| 348 | leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value; |
| 349 | |
| 350 | /* Find GPTIMER Timer Registers base address otherwise bail out. */ |
Daniel Hellstrom | 2791c1a | 2011-01-04 01:41:32 +0000 | [diff] [blame] | 351 | nnp = rootnp; |
| 352 | do { |
| 353 | np = of_find_node_by_name(nnp, "GAISLER_GPTIMER"); |
| 354 | if (!np) { |
| 355 | np = of_find_node_by_name(nnp, "01_011"); |
| 356 | if (!np) |
| 357 | goto bad; |
| 358 | } |
| 359 | |
| 360 | ampopts = 0; |
| 361 | pp = of_find_property(np, "ampopts", &len); |
| 362 | if (pp) { |
| 363 | ampopts = *(int *)pp->value; |
| 364 | if (ampopts == 0) { |
| 365 | /* Skip this instance, resource already |
| 366 | * allocated by other OS */ |
| 367 | nnp = np; |
| 368 | continue; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | /* Select Timer-Instance on Timer Core. Default is zero */ |
| 373 | leon3_gptimer_idx = ampopts & 0x7; |
| 374 | |
| 375 | pp = of_find_property(np, "reg", &len); |
| 376 | if (pp) |
| 377 | leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **) |
| 378 | pp->value; |
| 379 | pp = of_find_property(np, "interrupts", &len); |
| 380 | if (pp) |
| 381 | leon3_gptimer_irq = *(unsigned int *)pp->value; |
| 382 | } while (0); |
Daniel Hellstrom | 53aea7c | 2011-01-04 01:41:29 +0000 | [diff] [blame] | 383 | |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 384 | if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq)) |
| 385 | goto bad; |
| 386 | |
Andreas Larsson | 384859d | 2014-08-29 17:09:18 +0200 | [diff] [blame] | 387 | ctrl = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl); |
| 388 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, |
| 389 | ctrl | LEON3_GPTIMER_CTRL_PENDING); |
| 390 | ctrl = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl); |
| 391 | |
| 392 | if ((ctrl & LEON3_GPTIMER_CTRL_PENDING) != 0) |
| 393 | leon3_gptimer_ackmask = ~LEON3_GPTIMER_CTRL_PENDING; |
| 394 | else |
| 395 | leon3_gptimer_ackmask = ~0; |
| 396 | |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 397 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0); |
| 398 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld, |
| 399 | (((1000000 / HZ) - 1))); |
| 400 | LEON3_BYPASS_STORE_PA( |
Daniel Hellstrom | 2791c1a | 2011-01-04 01:41:32 +0000 | [diff] [blame] | 401 | &leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0); |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 402 | |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 403 | /* |
| 404 | * The IRQ controller may (if implemented) consist of multiple |
| 405 | * IRQ controllers, each mapped on a 4Kb boundary. |
| 406 | * Each CPU may be routed to different IRQCTRLs, however |
| 407 | * we assume that all CPUs (in SMP system) is routed to the |
| 408 | * same IRQ Controller, and for non-SMP only one IRQCTRL is |
| 409 | * accessed anyway. |
| 410 | * In AMP systems, Linux must run on CPU0 for the time being. |
| 411 | */ |
Daniel Hellstrom | 01dae0f | 2011-04-21 04:20:24 +0000 | [diff] [blame] | 412 | icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[boot_cpu_id/8]); |
| 413 | icsel = (icsel >> ((7 - (boot_cpu_id&0x7)) * 4)) & 0xf; |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 414 | leon3_irqctrl_regs += icsel; |
| 415 | |
Daniel Hellstrom | 970def6 | 2011-04-21 04:20:25 +0000 | [diff] [blame] | 416 | /* Mask all IRQs on boot-cpu IRQ controller */ |
| 417 | LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[boot_cpu_id], 0); |
| 418 | |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 419 | /* Probe extended IRQ controller */ |
| 420 | eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus) |
| 421 | >> 16) & 0xf; |
| 422 | if (eirq != 0) |
| 423 | leon_eirq_setup(eirq); |
| 424 | |
Daniel Hellstrom | 10f0d07 | 2011-06-09 02:54:09 +0000 | [diff] [blame] | 425 | #ifdef CONFIG_SMP |
| 426 | { |
| 427 | unsigned long flags; |
| 428 | |
| 429 | /* |
| 430 | * In SMP, sun4m adds a IPI handler to IRQ trap handler that |
| 431 | * LEON never must take, sun4d and LEON overwrites the branch |
| 432 | * with a NOP. |
| 433 | */ |
| 434 | local_irq_save(flags); |
| 435 | patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */ |
David S. Miller | 5d83d66 | 2012-05-13 20:49:31 -0700 | [diff] [blame] | 436 | local_ops->cache_all(); |
Daniel Hellstrom | 10f0d07 | 2011-06-09 02:54:09 +0000 | [diff] [blame] | 437 | local_irq_restore(flags); |
| 438 | } |
| 439 | #endif |
| 440 | |
Andreas Larsson | 1ffbc51 | 2013-06-10 08:53:28 +0200 | [diff] [blame] | 441 | config = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config); |
| 442 | if (config & (1 << LEON3_GPTIMER_SEPIRQ)) |
| 443 | leon3_gptimer_irq += leon3_gptimer_idx; |
| 444 | else if ((config & LEON3_GPTIMER_TIMERS) > 1) |
| 445 | pr_warn("GPTIMER uses shared irqs, using other timers of the same core will fail.\n"); |
| 446 | |
| 447 | #ifdef CONFIG_SMP |
| 448 | /* Install per-cpu IRQ handler for broadcasted ticker */ |
| 449 | irq = leon_build_device_irq(leon3_gptimer_irq, handle_percpu_irq, |
| 450 | "per-cpu", 0); |
| 451 | err = request_irq(irq, leon_percpu_timer_ce_interrupt, |
| 452 | IRQF_PERCPU | IRQF_TIMER, "timer", NULL); |
| 453 | #else |
| 454 | irq = _leon_build_device_irq(NULL, leon3_gptimer_irq); |
| 455 | err = request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL); |
| 456 | #endif |
| 457 | if (err) { |
| 458 | pr_err("Unable to attach timer IRQ%d\n", irq); |
| 459 | prom_halt(); |
| 460 | } |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 461 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, |
| 462 | LEON3_GPTIMER_EN | |
| 463 | LEON3_GPTIMER_RL | |
| 464 | LEON3_GPTIMER_LD | |
| 465 | LEON3_GPTIMER_IRQEN); |
Daniel Hellstrom | 53aea7c | 2011-01-04 01:41:29 +0000 | [diff] [blame] | 466 | return; |
| 467 | bad: |
| 468 | printk(KERN_ERR "No Timer/irqctrl found\n"); |
| 469 | BUG(); |
| 470 | return; |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 471 | } |
| 472 | |
Sam Ravnborg | 08c9388 | 2012-05-14 17:30:35 +0200 | [diff] [blame] | 473 | static void leon_clear_clock_irq(void) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 474 | { |
Andreas Larsson | 384859d | 2014-08-29 17:09:18 +0200 | [diff] [blame] | 475 | u32 ctrl; |
| 476 | |
| 477 | ctrl = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl); |
| 478 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, |
| 479 | ctrl & leon3_gptimer_ackmask); |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 480 | } |
| 481 | |
Sam Ravnborg | 08c9388 | 2012-05-14 17:30:35 +0200 | [diff] [blame] | 482 | static void leon_load_profile_irq(int cpu, unsigned int limit) |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 483 | { |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 484 | } |
| 485 | |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 486 | void __init leon_trans_init(struct device_node *dp) |
| 487 | { |
| 488 | if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) { |
| 489 | struct property *p; |
| 490 | p = of_find_property(dp, "mid", (void *)0); |
| 491 | if (p) { |
| 492 | int mid; |
| 493 | dp->name = prom_early_alloc(5 + 1); |
| 494 | memcpy(&mid, p->value, p->length); |
| 495 | sprintf((char *)dp->name, "cpu%.2d", mid); |
| 496 | } |
| 497 | } |
| 498 | } |
| 499 | |
Konrad Eisele | 8401707 | 2009-08-31 22:08:13 +0000 | [diff] [blame] | 500 | #ifdef CONFIG_SMP |
Konrad Eisele | 8401707 | 2009-08-31 22:08:13 +0000 | [diff] [blame] | 501 | void leon_clear_profile_irq(int cpu) |
| 502 | { |
| 503 | } |
| 504 | |
| 505 | void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu) |
| 506 | { |
| 507 | unsigned long mask, flags, *addr; |
Sam Ravnborg | 4ba22b1 | 2012-05-14 15:14:36 +0200 | [diff] [blame] | 508 | mask = leon_get_irqmask(irq_nr); |
Daniel Hellstrom | d61a38b | 2011-04-19 23:41:21 +0000 | [diff] [blame] | 509 | spin_lock_irqsave(&leon_irq_lock, flags); |
Daniel Hellstrom | a481b5d | 2011-04-19 23:41:25 +0000 | [diff] [blame] | 510 | addr = (unsigned long *)LEON_IMASK(cpu); |
| 511 | LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | mask)); |
Daniel Hellstrom | d61a38b | 2011-04-19 23:41:21 +0000 | [diff] [blame] | 512 | spin_unlock_irqrestore(&leon_irq_lock, flags); |
Konrad Eisele | 8401707 | 2009-08-31 22:08:13 +0000 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | #endif |
| 516 | |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 517 | void __init leon_init_IRQ(void) |
| 518 | { |
Sam Ravnborg | 472bc4f | 2012-04-04 13:21:13 +0200 | [diff] [blame] | 519 | sparc_config.init_timers = leon_init_timers; |
| 520 | sparc_config.build_device_irq = _leon_build_device_irq; |
Sam Ravnborg | 08c9388 | 2012-05-14 17:30:35 +0200 | [diff] [blame] | 521 | sparc_config.clock_rate = 1000000; |
| 522 | sparc_config.clear_clock_irq = leon_clear_clock_irq; |
| 523 | sparc_config.load_profile_irq = leon_load_profile_irq; |
Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame] | 524 | } |