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("$FreeBSD$"); 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 <vm/vm.h> 35 #include <vm/pmap.h> 36 37 #include <machine/cpu.h> 38 #include <machine/smp.h> 39 #include <machine/fdt.h> 40 #include <machine/intr.h> 41 42 #include <arm/xilinx/zy7_reg.h> 43 44 #define ZYNQ7_CPU1_ENTRY 0xfffffff0 45 46 #define SCU_CONTROL_REG 0xf8f00000 47 #define SCU_CONTROL_ENABLE (1 << 0) 48 49 void 50 platform_mp_setmaxid(void) 51 { 52 53 mp_maxid = 1; 54 mp_ncpus = 2; 55 } 56 57 void 58 platform_mp_start_ap(void) 59 { 60 bus_space_handle_t scu_handle; 61 bus_space_handle_t ocm_handle; 62 uint32_t scu_ctrl; 63 64 /* Map in SCU control register. */ 65 if (bus_space_map(fdtbus_bs_tag, SCU_CONTROL_REG, 4, 66 0, &scu_handle) != 0) 67 panic("platform_mp_start_ap: Couldn't map SCU config reg\n"); 68 69 /* Set SCU enable bit. */ 70 scu_ctrl = bus_space_read_4(fdtbus_bs_tag, scu_handle, 0); 71 scu_ctrl |= SCU_CONTROL_ENABLE; 72 bus_space_write_4(fdtbus_bs_tag, scu_handle, 0, scu_ctrl); 73 74 bus_space_unmap(fdtbus_bs_tag, scu_handle, 4); 75 76 /* Map in magic location to give entry address to CPU1. */ 77 if (bus_space_map(fdtbus_bs_tag, ZYNQ7_CPU1_ENTRY, 4, 78 0, &ocm_handle) != 0) 79 panic("platform_mp_start_ap: Couldn't map OCM\n"); 80 81 /* Write start address for CPU1. */ 82 bus_space_write_4(fdtbus_bs_tag, ocm_handle, 0, 83 pmap_kextract((vm_offset_t)mpentry)); 84 85 bus_space_unmap(fdtbus_bs_tag, ocm_handle, 4); 86 87 /* 88 * The SCU is enabled above but I think the second CPU doesn't 89 * turn on filtering until after the wake-up below. I think that's why 90 * things don't work if I don't put these cache ops here. Also, the 91 * magic location, 0xfffffff0, isn't in the SCU's filtering range so it 92 * needs a write-back too. 93 */ 94 dcache_wbinv_poc_all(); 95 96 /* Wake up CPU1. */ 97 armv7_sev(); 98 } 99