/* * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights * reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the NetLogic * license below: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #if defined(CONFIG_CPU_XLP) #include #include #include #elif defined(CONFIG_CPU_XLR) #include #include #include #else #error "Unknown CPU" #endif void nlm_send_ipi_single(int logical_cpu, unsigned int action) { int cpu = cpu_logical_map(logical_cpu); if (action & SMP_CALL_FUNCTION) nlm_pic_send_ipi(nlm_pic_base, cpu, IRQ_IPI_SMP_FUNCTION, 0); if (action & SMP_RESCHEDULE_YOURSELF) nlm_pic_send_ipi(nlm_pic_base, cpu, IRQ_IPI_SMP_RESCHEDULE, 0); } void nlm_send_ipi_mask(const struct cpumask *mask, unsigned int action) { int cpu; for_each_cpu(cpu, mask) { nlm_send_ipi_single(cpu, action); } } /* IRQ_IPI_SMP_FUNCTION Handler */ void nlm_smp_function_ipi_handler(unsigned int irq, struct irq_desc *desc) { write_c0_eirr(1ull << irq); smp_call_function_interrupt(); } /* IRQ_IPI_SMP_RESCHEDULE handler */ void nlm_smp_resched_ipi_handler(unsigned int irq, struct irq_desc *desc) { write_c0_eirr(1ull << irq); scheduler_ipi(); } /* * Called before going into mips code, early cpu init */ void nlm_early_init_secondary(int cpu) { change_c0_config(CONF_CM_CMASK, 0x3); write_c0_ebase((uint32_t)nlm_common_ebase); #ifdef CONFIG_CPU_XLP if (hard_smp_processor_id() % 4 == 0) xlp_mmu_init(); #endif } /* * Code to run on secondary just after probing the CPU */ static void __cpuinit nlm_init_secondary(void) { current_cpu_data.core = hard_smp_processor_id() / 4; nlm_smp_irq_init(); } void nlm_prepare_cpus(unsigned int max_cpus) { /* declare we are SMT capable */ smp_num_siblings = nlm_threads_per_core; } void nlm_smp_finish(void) { #ifdef notyet nlm_common_msgring_cpu_init(); #endif local_irq_enable(); } void nlm_cpus_done(void) { } /* * Boot all other cpus in the system, initialize them, and bring them into * the boot function */ int nlm_cpu_ready[NR_CPUS]; unsigned long nlm_next_gp; unsigned long nlm_next_sp; cpumask_t phys_cpu_present_map; void nlm_boot_secondary(int logical_cpu, struct task_struct *idle) { unsigned long gp = (unsigned long)task_thread_info(idle); unsigned long sp = (unsigned long)__KSTK_TOS(idle); int cpu = cpu_logical_map(logical_cpu); nlm_next_sp = sp; nlm_next_gp = gp; /* barrier */ __sync(); nlm_pic_send_ipi(nlm_pic_base, cpu, 1, 1); } void __init nlm_smp_setup(void) { unsigned int boot_cpu; int num_cpus, i; boot_cpu = hard_smp_processor_id(); cpus_clear(phys_cpu_present_map); cpu_set(boot_cpu, phys_cpu_present_map); __cpu_number_map[boot_cpu] = 0; __cpu_logical_map[0] = boot_cpu; cpu_set(0, cpu_possible_map); num_cpus = 1; for (i = 0; i < NR_CPUS; i++) { /* * nlm_cpu_ready array is not set for the boot_cpu, * it is only set for ASPs (see smpboot.S) */ if (nlm_cpu_ready[i]) { cpu_set(i, phys_cpu_present_map); __cpu_number_map[i] = num_cpus; __cpu_logical_map[num_cpus] = i; cpu_set(num_cpus, cpu_possible_map); ++num_cpus; } } pr_info("Phys CPU present map: %lx, possible map %lx\n", (unsigned long)phys_cpu_present_map.bits[0], (unsigned long)cpu_possible_map.bits[0]); pr_info("Detected %i Slave CPU(s)\n", num_cpus); nlm_set_nmi_handler(nlm_boot_secondary_cpus); } static int nlm_parse_cpumask(u32 cpu_mask) { uint32_t core0_thr_mask, core_thr_mask; int threadmode, i; core0_thr_mask = cpu_mask & 0xf; switch (core0_thr_mask) { case 1: nlm_threads_per_core = 1; threadmode = 0; break; case 3: nlm_threads_per_core = 2; threadmode = 2; break; case 0xf: nlm_threads_per_core = 4; threadmode = 3; break; default: goto unsupp; } /* Verify other cores CPU masks */ nlm_coremask = 1; nlm_cpumask = core0_thr_mask; for (i = 1; i < 8; i++) { core_thr_mask = (cpu_mask >> (i * 4)) & 0xf; if (core_thr_mask) { if (core_thr_mask != core0_thr_mask) goto unsupp; nlm_coremask |= 1 << i; nlm_cpumask |= core0_thr_mask << (4 * i); } } return threadmode; unsupp: panic("Unsupported CPU mask %x\n", cpu_mask); return 0; } int __cpuinit nlm_wakeup_secondary_cpus(u32 wakeup_mask) { unsigned long reset_vec; char *reset_data; int threadmode; /* Update reset entry point with CPU init code */ reset_vec = CKSEG1ADDR(RESET_VEC_PHYS); memcpy((void *)reset_vec, (void *)nlm_reset_entry, (nlm_reset_entry_end - nlm_reset_entry)); /* verify the mask and setup core config variables */ threadmode = nlm_parse_cpumask(wakeup_mask); /* Setup CPU init parameters */ reset_data = (char *)CKSEG1ADDR(RESET_DATA_PHYS); *(int *)(reset_data + BOOT_THREAD_MODE) = threadmode; #ifdef CONFIG_CPU_XLP xlp_wakeup_secondary_cpus(); #else xlr_wakeup_secondary_cpus(); #endif return 0; } struct plat_smp_ops nlm_smp_ops = { .send_ipi_single = nlm_send_ipi_single, .send_ipi_mask = nlm_send_ipi_mask, .init_secondary = nlm_init_secondary, .smp_finish = nlm_smp_finish, .cpus_done = nlm_cpus_done, .boot_secondary = nlm_boot_secondary, .smp_setup = nlm_smp_setup, .prepare_cpus = nlm_prepare_cpus, };