139b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle/* 25792bf6438658cb129c3022aa2cf7e9b19b5de3aSteven J. Hill * This file is subject to the terms and conditions of the GNU General Public 35792bf6438658cb129c3022aa2cf7e9b19b5de3aSteven J. Hill * License. See the file "COPYING" in the main directory of this archive 45792bf6438658cb129c3022aa2cf7e9b19b5de3aSteven J. Hill * for more details. 539b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle * 65792bf6438658cb129c3022aa2cf7e9b19b5de3aSteven J. Hill * Copyright (C) 2007 MIPS Technologies, Inc. All rights reserved. 75792bf6438658cb129c3022aa2cf7e9b19b5de3aSteven J. Hill * Copyright (C) 2013 Imagination Technologies Ltd. 839b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle * 95792bf6438658cb129c3022aa2cf7e9b19b5de3aSteven J. Hill * Arbitrary Monitor Interface 1039b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle */ 1139b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle#include <linux/kernel.h> 1239b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle#include <linux/smp.h> 1339b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 149e86786a4b17ad186f456dc6ac0508a17556731bDavid Daney#include <asm/addrspace.h> 159e86786a4b17ad186f456dc6ac0508a17556731bDavid Daney#include <asm/mipsmtregs.h> 165792bf6438658cb129c3022aa2cf7e9b19b5de3aSteven J. Hill#include <asm/mips-boards/launch.h> 171336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu#include <asm/vpe.h> 1839b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 1939b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechleint amon_cpu_avail(int cpu) 2039b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle{ 21938b2b14172bd098972df2a5157bfabf161c90e5Thomas Bogendoerfer struct cpulaunch *launch = (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH); 2239b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 2339b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle if (cpu < 0 || cpu >= NCPULAUNCH) { 2439b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle pr_debug("avail: cpu%d is out of range\n", cpu); 2539b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle return 0; 2639b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle } 2739b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 2839b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle launch += cpu; 2939b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle if (!(launch->flags & LAUNCH_FREADY)) { 3039b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle pr_debug("avail: cpu%d is not ready\n", cpu); 3139b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle return 0; 3239b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle } 3339b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle if (launch->flags & (LAUNCH_FGO|LAUNCH_FGONE)) { 3439b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle pr_debug("avail: too late.. cpu%d is already gone\n", cpu); 3539b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle return 0; 3639b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle } 3739b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 3839b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle return 1; 3939b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle} 4039b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 411336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhuint amon_cpu_start(int cpu, 4239b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle unsigned long pc, unsigned long sp, 4339b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle unsigned long gp, unsigned long a0) 4439b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle{ 4539b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle volatile struct cpulaunch *launch = 46938b2b14172bd098972df2a5157bfabf161c90e5Thomas Bogendoerfer (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH); 4739b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 4839b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle if (!amon_cpu_avail(cpu)) 491336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu return -1; 5039b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle if (cpu == smp_processor_id()) { 5139b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle pr_debug("launch: I am cpu%d!\n", cpu); 521336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu return -1; 5339b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle } 5439b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle launch += cpu; 5539b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 5639b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle pr_debug("launch: starting cpu%d\n", cpu); 5739b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 5839b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle launch->pc = pc; 5939b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle launch->gp = gp; 6039b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle launch->sp = sp; 6139b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle launch->a0 = a0; 6239b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle 637034228792cc561e79ff8600f02884bd4c80e287Ralf Baechle smp_wmb(); /* Target must see parameters before go */ 6439b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle launch->flags |= LAUNCH_FGO; 657034228792cc561e79ff8600f02884bd4c80e287Ralf Baechle smp_wmb(); /* Target must see go before we poll */ 662ee0a42961c942c6a2fb70700ef4e25c0acf5fcaChris Dearman 6739b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle while ((launch->flags & LAUNCH_FGONE) == 0) 6839b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle ; 697034228792cc561e79ff8600f02884bd4c80e287Ralf Baechle smp_rmb(); /* Target will be updating flags soon */ 7039b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle pr_debug("launch: cpu%d gone!\n", cpu); 711336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu 721336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu return 0; 731336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu} 741336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu 75031365b471e3268e3b8d6991b2cf0bae6b5e8bdcDeng-Cheng Zhu#ifdef CONFIG_MIPS_VPE_LOADER_CMP 761336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhuint vpe_run(struct vpe *v) 771336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu{ 781336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu struct vpe_notifications *n; 791336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu 801336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu if (amon_cpu_start(aprp_cpu_index(), v->__start, 0, 0, 0) < 0) 811336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu return -1; 821336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu 831336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu list_for_each_entry(n, &v->notify, list) 841336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu n->start(VPE_MODULE_MINOR); 851336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu 861336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu return 0; 8739b8d5254246ac56342b72f812255c8f7a74dca9Ralf Baechle} 881336113a6c93fa345f7465e066313e5629f581d9Deng-Cheng Zhu#endif 89