1 // SPDX-License-Identifier: GPL-2.0
2 /* leon_smp.c: Sparc-Leon SMP support.
27 #include <linux/cpu.h>
81 	 * go-ahead by setting the smp_commenced_mask and will wait without  in leon_cpu_pre_online()
87 	local_ops->cache_all();  in leon_cpu_pre_online()
88 	local_ops->tlb_all();  in leon_cpu_pre_online()
96 	current->active_mm = &init_mm;  in leon_cpu_pre_online()
114 …printk(KERN_INFO "Note: SMP with snooping only works on 4k cache, found %dk(0x%x) on cpu %d, disab…  in leon_configure_cache_smp()
122 …	printk(KERN_INFO "Note: You have to enable snooping in the vhdl model cpu %d, disabling caches\n",  in leon_configure_cache_smp()
128 	local_ops->cache_all();  in leon_configure_cache_smp()
129 	local_ops->tlb_all();  in leon_configure_cache_smp()
135 	    ((LEON3_BYPASS_LOAD_PA(&(leon3_irqctrl_regs->mpstatus)) >>  in leon_smp_setbroadcast()
138 …prom_printf("######## !!!! The irqmp-ctrl must have broadcast enabled, smp wont work !!!!! #######…  in leon_smp_setbroadcast()
147 	LEON_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mpbroadcast), mask);  in leon_smp_setbroadcast()
153 	    ((LEON3_BYPASS_LOAD_PA(&(leon3_irqctrl_regs->mpstatus)) >>  in leon_smp_nrcpus()
168 	       (unsigned int)&(leon3_irqctrl_regs->mpstatus));  in leon_boot_cpus()
177 	local_ops->cache_all();  in leon_boot_cpus()
190 	 * we need to re-initialize it for each cpu  in leon_boot_one_cpu()
197 	printk(KERN_INFO "Starting CPU %d : (irqmp: 0x%x)\n", (unsigned int)i,  in leon_boot_one_cpu()
198 	       (unsigned int)&leon3_irqctrl_regs->mpstatus);  in leon_boot_one_cpu()
199 	local_ops->cache_all();  in leon_boot_one_cpu()
201 	/* Make sure all IRQs are of from the start for this new CPU */  in leon_boot_one_cpu()
202 	LEON_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[i], 0);  in leon_boot_one_cpu()
204 	/* Wake one CPU */  in leon_boot_one_cpu()
205 	LEON_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mpstatus), 1 << i);  in leon_boot_one_cpu()
213 	printk(KERN_INFO "Started CPU %d\n", (unsigned int)i);  in leon_boot_one_cpu()
217 		return -ENODEV;  in leon_boot_one_cpu()
224 	local_ops->cache_all();  in leon_boot_one_cpu()
234 	/* setup cpu list for irq rotation */  in leon_smp_done()
244 	local_ops->cache_all();  in leon_smp_done()
262 	int single;  member
274 	int cpu, len;  in leon_ipi_init()  local
285 		if (pp && (*(int *)pp->value))  in leon_ipi_init()
286 			leon_ipi_irq = *(int *)pp->value;  in leon_ipi_init()
292 	trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_ipi_irq - 1)];  in leon_ipi_init()
293 	trap_table->inst_three += smpleon_ipi - real_irq_entry;  in leon_ipi_init()
294 	local_ops->cache_all();  in leon_ipi_init()
297 	for_each_possible_cpu(cpu) {  in leon_ipi_init()
298 		work = &per_cpu(leon_ipi_work, cpu);  in leon_ipi_init()
299 		work->single = work->msk = work->resched = 0;  in leon_ipi_init()
303 static void leon_send_ipi(int cpu, int level)  in leon_send_ipi()  argument
307 	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask);  in leon_send_ipi()
310 static void leon_ipi_single(int cpu)  in leon_ipi_single()  argument
312 	struct leon_ipi_work *work = &per_cpu(leon_ipi_work, cpu);  in leon_ipi_single()
315 	work->single = 1;  in leon_ipi_single()
317 	/* Generate IRQ on the CPU */  in leon_ipi_single()
318 	leon_send_ipi(cpu, leon_ipi_irq);  in leon_ipi_single()
321 static void leon_ipi_mask_one(int cpu)  in leon_ipi_mask_one()  argument
323 	struct leon_ipi_work *work = &per_cpu(leon_ipi_work, cpu);  in leon_ipi_mask_one()
326 	work->msk = 1;  in leon_ipi_mask_one()
328 	/* Generate IRQ on the CPU */  in leon_ipi_mask_one()
329 	leon_send_ipi(cpu, leon_ipi_irq);  in leon_ipi_mask_one()
332 static void leon_ipi_resched(int cpu)  in leon_ipi_resched()  argument
334 	struct leon_ipi_work *work = &per_cpu(leon_ipi_work, cpu);  in leon_ipi_resched()
337 	work->resched = 1;  in leon_ipi_resched()
339 	/* Generate IRQ on the CPU (any IRQ will cause resched) */  in leon_ipi_resched()
340 	leon_send_ipi(cpu, leon_ipi_irq);  in leon_ipi_resched()
347 	if (work->single) {  in leonsmp_ipi_interrupt()
348 		work->single = 0;  in leonsmp_ipi_interrupt()
351 	if (work->msk) {  in leonsmp_ipi_interrupt()
352 		work->msk = 0;  in leonsmp_ipi_interrupt()
355 	if (work->resched) {  in leonsmp_ipi_interrupt()
356 		work->resched = 0;  in leonsmp_ipi_interrupt()
380 		register int high = NR_CPUS - 1;  in leon_cross_call()
460 	.single     = leon_ipi_single,
467 	t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_leon - linux_trap_ipi15_sun4m);  in leon_init_smp()