1 /*- 2 * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com> 3 * Copyright (c) 2015 Semihalf 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #define _ARM32_BUS_DMA_PRIVATE 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 #include <sys/devmap.h> 39 40 #include <vm/vm.h> 41 #include <vm/pmap.h> 42 43 #include <machine/bus.h> 44 #include <machine/frame.h> /* For trapframe_t, used in <machine/machdep.h> */ 45 #include <machine/machdep.h> 46 #include <machine/platform.h> 47 #include <machine/fdt.h> 48 49 #include <dev/fdt/fdt_common.h> 50 51 #include "opt_ddb.h" 52 #include "opt_platform.h" 53 54 struct mtx al_dbg_lock; 55 56 #define DEVMAP_MAX_VA_ADDRESS 0xF0000000 57 bus_addr_t al_devmap_pa; 58 bus_addr_t al_devmap_size; 59 60 #define AL_NB_SERVICE_OFFSET 0x70000 61 #define AL_NB_CCU_OFFSET 0x90000 62 #define AL_CCU_SNOOP_CONTROL_IOFAB_0_OFFSET 0x4000 63 #define AL_CCU_SNOOP_CONTROL_IOFAB_1_OFFSET 0x5000 64 #define AL_CCU_SPECULATION_CONTROL_OFFSET 0x4 65 66 #define AL_NB_ACF_MISC_OFFSET 0xD0 67 #define AL_NB_ACF_MISC_READ_BYPASS (1 << 30) 68 69 int alpine_get_devmap_base(bus_addr_t *pa, bus_addr_t *size); 70 71 vm_offset_t 72 platform_lastaddr(void) 73 { 74 75 return (DEVMAP_MAX_VA_ADDRESS); 76 } 77 78 void 79 platform_probe_and_attach(void) 80 { 81 82 } 83 84 void 85 platform_gpio_init(void) 86 { 87 88 } 89 90 void 91 platform_late_init(void) 92 { 93 bus_addr_t reg_baddr; 94 uint32_t val; 95 96 if (!mtx_initialized(&al_dbg_lock)) 97 mtx_init(&al_dbg_lock, "ALDBG", "ALDBG", MTX_SPIN); 98 99 /* configure system fabric */ 100 if (bus_space_map(fdtbus_bs_tag, al_devmap_pa, al_devmap_size, 0, 101 ®_baddr)) 102 panic("Couldn't map Register Space area"); 103 104 /* do not allow reads to bypass writes to different addresses */ 105 val = bus_space_read_4(fdtbus_bs_tag, reg_baddr, 106 AL_NB_SERVICE_OFFSET + AL_NB_ACF_MISC_OFFSET); 107 val &= ~AL_NB_ACF_MISC_READ_BYPASS; 108 bus_space_write_4(fdtbus_bs_tag, reg_baddr, 109 AL_NB_SERVICE_OFFSET + AL_NB_ACF_MISC_OFFSET, val); 110 111 /* enable cache snoop */ 112 bus_space_write_4(fdtbus_bs_tag, reg_baddr, 113 AL_NB_CCU_OFFSET + AL_CCU_SNOOP_CONTROL_IOFAB_0_OFFSET, 1); 114 bus_space_write_4(fdtbus_bs_tag, reg_baddr, 115 AL_NB_CCU_OFFSET + AL_CCU_SNOOP_CONTROL_IOFAB_1_OFFSET, 1); 116 117 /* disable speculative fetches from masters */ 118 bus_space_write_4(fdtbus_bs_tag, reg_baddr, 119 AL_NB_CCU_OFFSET + AL_CCU_SPECULATION_CONTROL_OFFSET, 7); 120 121 bus_space_unmap(fdtbus_bs_tag, reg_baddr, al_devmap_size); 122 } 123 124 /* 125 * Construct devmap table with DT-derived config data. 126 */ 127 int 128 platform_devmap_init(void) 129 { 130 alpine_get_devmap_base(&al_devmap_pa, &al_devmap_size); 131 devmap_add_entry(al_devmap_pa, al_devmap_size); 132 return (0); 133 } 134 135 struct arm32_dma_range * 136 bus_dma_get_range(void) 137 { 138 139 return (NULL); 140 } 141 142 int 143 bus_dma_get_range_nb(void) 144 { 145 146 return (0); 147 } 148