1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Smp support for CHRP machines. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great 6*4882a593Smuzhiyun * deal of code from the sparc and intel versions. 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <linux/kernel.h> 13*4882a593Smuzhiyun #include <linux/sched.h> 14*4882a593Smuzhiyun #include <linux/smp.h> 15*4882a593Smuzhiyun #include <linux/interrupt.h> 16*4882a593Smuzhiyun #include <linux/kernel_stat.h> 17*4882a593Smuzhiyun #include <linux/delay.h> 18*4882a593Smuzhiyun #include <linux/spinlock.h> 19*4882a593Smuzhiyun #include <linux/pgtable.h> 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #include <asm/ptrace.h> 22*4882a593Smuzhiyun #include <linux/atomic.h> 23*4882a593Smuzhiyun #include <asm/irq.h> 24*4882a593Smuzhiyun #include <asm/page.h> 25*4882a593Smuzhiyun #include <asm/sections.h> 26*4882a593Smuzhiyun #include <asm/io.h> 27*4882a593Smuzhiyun #include <asm/prom.h> 28*4882a593Smuzhiyun #include <asm/smp.h> 29*4882a593Smuzhiyun #include <asm/machdep.h> 30*4882a593Smuzhiyun #include <asm/mpic.h> 31*4882a593Smuzhiyun #include <asm/rtas.h> 32*4882a593Smuzhiyun smp_chrp_kick_cpu(int nr)33*4882a593Smuzhiyunstatic int smp_chrp_kick_cpu(int nr) 34*4882a593Smuzhiyun { 35*4882a593Smuzhiyun *(unsigned long *)KERNELBASE = nr; 36*4882a593Smuzhiyun asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory"); 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun return 0; 39*4882a593Smuzhiyun } 40*4882a593Smuzhiyun smp_chrp_setup_cpu(int cpu_nr)41*4882a593Smuzhiyunstatic void smp_chrp_setup_cpu(int cpu_nr) 42*4882a593Smuzhiyun { 43*4882a593Smuzhiyun mpic_setup_this_cpu(); 44*4882a593Smuzhiyun } 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun /* CHRP with openpic */ 47*4882a593Smuzhiyun struct smp_ops_t chrp_smp_ops = { 48*4882a593Smuzhiyun .cause_nmi_ipi = NULL, 49*4882a593Smuzhiyun .message_pass = smp_mpic_message_pass, 50*4882a593Smuzhiyun .probe = smp_mpic_probe, 51*4882a593Smuzhiyun .kick_cpu = smp_chrp_kick_cpu, 52*4882a593Smuzhiyun .setup_cpu = smp_chrp_setup_cpu, 53*4882a593Smuzhiyun .give_timebase = rtas_give_timebase, 54*4882a593Smuzhiyun .take_timebase = rtas_take_timebase, 55*4882a593Smuzhiyun }; 56