zy7_mp.c revision 277265
1/*- 2 * Copyright (c) 2013 Thomas Skibo. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25#include <sys/cdefs.h> 26__FBSDID("$FreeBSD: head/sys/arm/xilinx/zy7_mp.c 277265 2015-01-16 19:49:10Z ian $"); 27#include <sys/param.h> 28#include <sys/systm.h> 29#include <sys/bus.h> 30#include <sys/lock.h> 31#include <sys/mutex.h> 32#include <sys/smp.h> 33 34#include <machine/smp.h> 35#include <machine/fdt.h> 36#include <machine/intr.h> 37 38#include <arm/xilinx/zy7_reg.h> 39 40#define ZYNQ7_CPU1_ENTRY 0xfffffff0 41 42#define SCU_CONTROL_REG 0xf8f00000 43#define SCU_CONTROL_ENABLE (1 << 0) 44 45void 46platform_mp_init_secondary(void) 47{ 48 49 arm_init_secondary_ic(); 50} 51 52void 53platform_mp_setmaxid(void) 54{ 55 56 mp_maxid = 1; 57} 58 59int 60platform_mp_probe(void) 61{ 62 63 mp_ncpus = 2; 64 return (1); 65} 66 67void 68platform_mp_start_ap(void) 69{ 70 bus_space_handle_t scu_handle; 71 bus_space_handle_t ocm_handle; 72 uint32_t scu_ctrl; 73 74 /* Map in SCU control register. */ 75 if (bus_space_map(fdtbus_bs_tag, SCU_CONTROL_REG, 4, 76 0, &scu_handle) != 0) 77 panic("platform_mp_start_ap: Couldn't map SCU config reg\n"); 78 79 /* Set SCU enable bit. */ 80 scu_ctrl = bus_space_read_4(fdtbus_bs_tag, scu_handle, 0); 81 scu_ctrl |= SCU_CONTROL_ENABLE; 82 bus_space_write_4(fdtbus_bs_tag, scu_handle, 0, scu_ctrl); 83 84 bus_space_unmap(fdtbus_bs_tag, scu_handle, 4); 85 86 /* Map in magic location to give entry address to CPU1. */ 87 if (bus_space_map(fdtbus_bs_tag, ZYNQ7_CPU1_ENTRY, 4, 88 0, &ocm_handle) != 0) 89 panic("platform_mp_start_ap: Couldn't map OCM\n"); 90 91 /* Write start address for CPU1. */ 92 bus_space_write_4(fdtbus_bs_tag, ocm_handle, 0, 93 pmap_kextract((vm_offset_t)mpentry)); 94 95 bus_space_unmap(fdtbus_bs_tag, ocm_handle, 4); 96 97 /* 98 * The SCU is enabled above but I think the second CPU doesn't 99 * turn on filtering until after the wake-up below. I think that's why 100 * things don't work if I don't put these cache ops here. Also, the 101 * magic location, 0xfffffff0, isn't in the SCU's filtering range so it 102 * needs a write-back too. 103 */ 104 cpu_idcache_wbinv_all(); 105 cpu_l2cache_wbinv_all(); 106 107 /* Wake up CPU1. */ 108 armv7_sev(); 109} 110 111void 112platform_ipi_send(cpuset_t cpus, u_int ipi) 113{ 114 115 pic_ipi_send(cpus, ipi); 116} 117