^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/clocksource.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/clockchips.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/oplib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/leon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/leon_amba.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/traps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "kernel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "prom.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "irq.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int leondebug_irq_disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int leon_debug_irqout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static volatile u32 dummy_master_l10_counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) unsigned long amba_system_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static DEFINE_SPINLOCK(leon_irq_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static unsigned long leon3_gptimer_ackmask; /* For clearing pending bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned int sparc_leon_eirq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define LEON_IACK (&leon3_irqctrl_regs->iclear)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define LEON_DO_ACK_HW 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* Return the last ACKed IRQ by the Extended IRQ controller. It has already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * been (automatically) ACKed when the CPU takes the trap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static inline unsigned int leon_eirq_get(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* Handle one or multiple IRQs from the extended interrupt controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static void leon_handle_ext_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned int eirq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct irq_bucket *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int cpu = sparc_leon3_cpuid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) eirq = leon_eirq_get(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) p = irq_map[eirq];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if ((eirq & 0x10) && p && p->irq) /* bit4 tells if IRQ happened */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) generic_handle_irq(p->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* The extended IRQ controller has been found, this function registers it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static void leon_eirq_setup(unsigned int eirq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) unsigned long mask, oldmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) unsigned int veirq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (eirq < 1 || eirq > 0xf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * controller have a mask-bit of their own, so this is safe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) irq_link(veirq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) mask = 1 << eirq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(boot_cpu_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) LEON3_BYPASS_STORE_PA(LEON_IMASK(boot_cpu_id), (oldmask | mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) sparc_leon_eirq = eirq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned long leon_get_irqmask(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned long mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!irq || ((irq > 0xf) && !sparc_leon_eirq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) || ((irq > 0x1f) && sparc_leon_eirq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) "leon_get_irqmask: false irq number: %d\n", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) mask = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) mask = LEON_HARD_INT(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int irq_choose_cpu(const struct cpumask *affinity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) cpumask_t mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) cpumask_and(&mask, cpu_online_mask, affinity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (cpumask_equal(&mask, cpu_online_mask) || cpumask_empty(&mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return boot_cpu_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return cpumask_first(&mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define irq_choose_cpu(affinity) boot_cpu_id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int leon_set_affinity(struct irq_data *data, const struct cpumask *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) bool force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) unsigned long mask, oldmask, flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) int oldcpu, newcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) mask = (unsigned long)data->chip_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) oldcpu = irq_choose_cpu(irq_data_get_affinity_mask(data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) newcpu = irq_choose_cpu(dest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (oldcpu == newcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /* unmask on old CPU first before enabling on the selected CPU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) spin_lock_irqsave(&leon_irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(oldcpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) LEON3_BYPASS_STORE_PA(LEON_IMASK(oldcpu), (oldmask & ~mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(newcpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) LEON3_BYPASS_STORE_PA(LEON_IMASK(newcpu), (oldmask | mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) spin_unlock_irqrestore(&leon_irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return IRQ_SET_MASK_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static void leon_unmask_irq(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) unsigned long mask, oldmask, flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) mask = (unsigned long)data->chip_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) cpu = irq_choose_cpu(irq_data_get_affinity_mask(data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) spin_lock_irqsave(&leon_irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask | mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) spin_unlock_irqrestore(&leon_irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static void leon_mask_irq(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) unsigned long mask, oldmask, flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) mask = (unsigned long)data->chip_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) cpu = irq_choose_cpu(irq_data_get_affinity_mask(data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) spin_lock_irqsave(&leon_irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask & ~mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) spin_unlock_irqrestore(&leon_irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static unsigned int leon_startup_irq(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) irq_link(data->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) leon_unmask_irq(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static void leon_shutdown_irq(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) leon_mask_irq(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) irq_unlink(data->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static void leon_eoi_irq(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) unsigned long mask = (unsigned long)data->chip_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (mask & LEON_DO_ACK_HW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static struct irq_chip leon_irq = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .name = "leon",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .irq_startup = leon_startup_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .irq_shutdown = leon_shutdown_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) .irq_mask = leon_mask_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) .irq_unmask = leon_unmask_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) .irq_eoi = leon_eoi_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) .irq_set_affinity = leon_set_affinity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * Build a LEON IRQ for the edge triggered LEON IRQ controller:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * Edge (normal) IRQ - handle_simple_irq, ack=DON'T-CARE, never ack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * Level IRQ (PCI|Level-GPIO) - handle_fasteoi_irq, ack=1, ack after ISR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * Per-CPU Edge - handle_percpu_irq, ack=0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) unsigned int leon_build_device_irq(unsigned int real_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) irq_flow_handler_t flow_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) const char *name, int do_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) unsigned int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) unsigned long mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct irq_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) irq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) mask = leon_get_irqmask(real_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (mask == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) irq = irq_alloc(real_irq, real_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (irq == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (do_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) mask |= LEON_DO_ACK_HW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) desc = irq_to_desc(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (!desc || !desc->handle_irq || desc->handle_irq == handle_bad_irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) irq_set_chip_and_handler_name(irq, &leon_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) flow_handler, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) irq_set_chip_data(irq, (void *)mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static unsigned int _leon_build_device_irq(struct platform_device *op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) unsigned int real_irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) void leon_update_virq_handling(unsigned int virq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) irq_flow_handler_t flow_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) const char *name, int do_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) unsigned long mask = (unsigned long)irq_get_chip_data(virq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) mask &= ~LEON_DO_ACK_HW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (do_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) mask |= LEON_DO_ACK_HW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) irq_set_chip_and_handler_name(virq, &leon_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) flow_handler, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) irq_set_chip_data(virq, (void *)mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static u32 leon_cycles_offset(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) u32 rld, val, ctrl, off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) rld = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) val = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) ctrl = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (LEON3_GPTIMER_CTRL_ISPENDING(ctrl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) val = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) off = 2 * rld - val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) off = rld - val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) /* smp clockevent irq */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static irqreturn_t leon_percpu_timer_ce_interrupt(int irq, void *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct clock_event_device *ce;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) int cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) leon_clear_profile_irq(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (cpu == boot_cpu_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) timer_interrupt(irq, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) ce = &per_cpu(sparc32_clockevent, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) irq_enter();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (ce->event_handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) ce->event_handler(ce);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) irq_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) #endif /* CONFIG_SMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) void __init leon_init_timers(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) int irq, eirq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct device_node *rootnp, *np, *nnp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) struct property *pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) int icsel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) int ampopts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) u32 config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) u32 ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) sparc_config.get_cycles_offset = leon_cycles_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) sparc_config.cs_period = 1000000 / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) sparc_config.features |= FEAT_L10_CLOCKSOURCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) #ifndef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) sparc_config.features |= FEAT_L10_CLOCKEVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) leondebug_irq_disable = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) leon_debug_irqout = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) master_l10_counter = (u32 __iomem *)&dummy_master_l10_counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) dummy_master_l10_counter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) rootnp = of_find_node_by_path("/ambapp0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (!rootnp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) goto bad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) /* Find System ID: GRLIB build ID and optional CHIP ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) pp = of_find_property(rootnp, "systemid", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) amba_system_id = *(unsigned long *)pp->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /* Find IRQMP IRQ Controller Registers base adr otherwise bail out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) np = of_find_node_by_name(rootnp, "GAISLER_IRQMP");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (!np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) np = of_find_node_by_name(rootnp, "01_00d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) goto bad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) pp = of_find_property(np, "reg", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (!pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) goto bad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) /* Find GPTIMER Timer Registers base address otherwise bail out. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) nnp = rootnp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) retry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (!np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) np = of_find_node_by_name(nnp, "01_011");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) goto bad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) ampopts = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) pp = of_find_property(np, "ampopts", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) if (pp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) ampopts = *(int *)pp->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (ampopts == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) /* Skip this instance, resource already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * allocated by other OS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) nnp = np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) goto retry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) /* Select Timer-Instance on Timer Core. Default is zero */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) leon3_gptimer_idx = ampopts & 0x7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) pp = of_find_property(np, "reg", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) pp->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) pp = of_find_property(np, "interrupts", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) if (pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) leon3_gptimer_irq = *(unsigned int *)pp->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) goto bad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) ctrl = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) ctrl | LEON3_GPTIMER_CTRL_PENDING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) ctrl = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if ((ctrl & LEON3_GPTIMER_CTRL_PENDING) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) leon3_gptimer_ackmask = ~LEON3_GPTIMER_CTRL_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) leon3_gptimer_ackmask = ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) (((1000000 / HZ) - 1)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) LEON3_BYPASS_STORE_PA(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) &leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * The IRQ controller may (if implemented) consist of multiple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * IRQ controllers, each mapped on a 4Kb boundary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * Each CPU may be routed to different IRQCTRLs, however
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * we assume that all CPUs (in SMP system) is routed to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * same IRQ Controller, and for non-SMP only one IRQCTRL is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * accessed anyway.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * In AMP systems, Linux must run on CPU0 for the time being.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[boot_cpu_id/8]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) icsel = (icsel >> ((7 - (boot_cpu_id&0x7)) * 4)) & 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) leon3_irqctrl_regs += icsel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) /* Mask all IRQs on boot-cpu IRQ controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[boot_cpu_id], 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /* Probe extended IRQ controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) >> 16) & 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (eirq != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) leon_eirq_setup(eirq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * In SMP, sun4m adds a IPI handler to IRQ trap handler that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * LEON never must take, sun4d and LEON overwrites the branch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * with a NOP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) local_ops->cache_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) config = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (config & (1 << LEON3_GPTIMER_SEPIRQ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) leon3_gptimer_irq += leon3_gptimer_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) else if ((config & LEON3_GPTIMER_TIMERS) > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) pr_warn("GPTIMER uses shared irqs, using other timers of the same core will fail.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /* Install per-cpu IRQ handler for broadcasted ticker */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) irq = leon_build_device_irq(leon3_gptimer_irq, handle_percpu_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) "per-cpu", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) err = request_irq(irq, leon_percpu_timer_ce_interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) IRQF_PERCPU | IRQF_TIMER, "timer", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) irq = _leon_build_device_irq(NULL, leon3_gptimer_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) err = request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) pr_err("Unable to attach timer IRQ%d\n", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) prom_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) LEON3_GPTIMER_EN |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) LEON3_GPTIMER_RL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) LEON3_GPTIMER_LD |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) LEON3_GPTIMER_IRQEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) bad:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) printk(KERN_ERR "No Timer/irqctrl found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) static void leon_clear_clock_irq(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) u32 ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) ctrl = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ctrl & leon3_gptimer_ackmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) static void leon_load_profile_irq(int cpu, unsigned int limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) void leon_clear_profile_irq(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) unsigned long mask, flags, *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) mask = leon_get_irqmask(irq_nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) spin_lock_irqsave(&leon_irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) addr = (unsigned long *)LEON_IMASK(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) spin_unlock_irqrestore(&leon_irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) void __init leon_init_IRQ(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) sparc_config.init_timers = leon_init_timers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) sparc_config.build_device_irq = _leon_build_device_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) sparc_config.clock_rate = 1000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) sparc_config.clear_clock_irq = leon_clear_clock_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) sparc_config.load_profile_irq = leon_load_profile_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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