apple_platform.c revision 1.3
1 /* $NetBSD: apple_platform.c,v 1.3 2021/09/02 20:57:57 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2021 Jared McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: apple_platform.c,v 1.3 2021/09/02 20:57:57 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/cpu.h> 35 #include <sys/device.h> 36 #include <sys/termios.h> 37 38 #include <dev/fdt/fdtvar.h> 39 #include <arm/fdt/arm_fdtvar.h> 40 41 #include <uvm/uvm_extern.h> 42 43 #include <machine/bootconfig.h> 44 45 #include <net/if_ether.h> 46 47 #include <dev/pci/pcivar.h> 48 #include <machine/pci_machdep.h> 49 50 #include <arm/cpufunc.h> 51 52 #include <arm/cortex/gtmr_var.h> 53 54 #include <arm/arm/psci.h> 55 #include <arm/fdt/psci_fdtvar.h> 56 57 #include <libfdt.h> 58 59 #include <arch/evbarm/fdt/platform.h> 60 61 extern struct bus_space arm_generic_bs_tag; 62 63 struct arm32_bus_dma_tag apple_coherent_dma_tag; 64 static struct arm32_dma_range apple_coherent_ranges[] = { 65 [0] = { 66 .dr_sysbase = 0, 67 .dr_busbase = 0, 68 .dr_len = UINTPTR_MAX, 69 .dr_flags = _BUS_DMAMAP_COHERENT, 70 } 71 }; 72 73 static void 74 apple_platform_bootstrap(void) 75 { 76 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 77 78 apple_coherent_dma_tag = arm_generic_dma_tag; 79 apple_coherent_dma_tag._ranges = apple_coherent_ranges; 80 apple_coherent_dma_tag._nranges = __arraycount(apple_coherent_ranges); 81 82 arm_fdt_cpu_bootstrap(); 83 } 84 85 static void 86 apple_platform_init_attach_args(struct fdt_attach_args *faa) 87 { 88 faa->faa_bst = &arm_generic_bs_tag; 89 faa->faa_dmat = &apple_coherent_dma_tag; 90 } 91 92 static const struct pmap_devmap * 93 apple_platform_devmap(void) 94 { 95 /* Size this to hold possible entries for the UART and SMP spin-table */ 96 static struct pmap_devmap devmap[] = { 97 DEVMAP_ENTRY_END, 98 DEVMAP_ENTRY_END, 99 DEVMAP_ENTRY_END 100 }; 101 bus_addr_t uart_base; 102 vaddr_t devmap_va = KERNEL_IO_VBASE; 103 u_int devmap_index = 0; 104 uint64_t release_addr; 105 int phandle; 106 107 phandle = fdtbus_get_stdout_phandle(); 108 if (phandle > 0 && fdtbus_get_reg(phandle, 0, &uart_base, NULL) == 0) { 109 devmap[devmap_index].pd_pa = DEVMAP_ALIGN(uart_base); 110 devmap[devmap_index].pd_va = DEVMAP_ALIGN(devmap_va); 111 devmap[devmap_index].pd_size = DEVMAP_SIZE(L3_SIZE); 112 devmap[devmap_index].pd_prot = VM_PROT_READ | VM_PROT_WRITE; 113 devmap[devmap_index].pd_flags = PMAP_DEV_SO; 114 devmap_va = DEVMAP_SIZE(devmap[devmap_index].pd_va + 115 devmap[devmap_index].pd_size); 116 devmap_index++; 117 } 118 119 /* XXX hopefully all release addresses are in the same 2M */ 120 phandle = OF_finddevice("/cpus/cpu@1"); 121 if (phandle > 0 && 122 of_getprop_uint64(phandle, "cpu-release-addr", &release_addr) == 0) { 123 devmap[devmap_index].pd_pa = DEVMAP_ALIGN(release_addr); 124 devmap[devmap_index].pd_va = DEVMAP_ALIGN(devmap_va); 125 devmap[devmap_index].pd_size = DEVMAP_SIZE(L2_SIZE); 126 devmap[devmap_index].pd_prot = VM_PROT_READ | VM_PROT_WRITE; 127 devmap[devmap_index].pd_flags = PMAP_WRITE_BACK; 128 devmap_va = DEVMAP_SIZE(devmap[devmap_index].pd_va + 129 devmap[devmap_index].pd_size); 130 devmap_index++; 131 } 132 133 return devmap; 134 } 135 136 static u_int 137 arm_platform_uart_freq(void) 138 { 139 return 0; 140 } 141 142 static int 143 apple_platform_get_mac_address(pci_chipset_tag_t pc, pcitag_t tag, 144 uint8_t *eaddr) 145 { 146 int b, d, f; 147 int bridge, len; 148 u_int bdf; 149 150 const int pcie = of_find_bycompat(OF_finddevice("/"), "apple,pcie"); 151 if (pcie == -1) { 152 return -1; 153 } 154 155 /* Convert PCI tag to encoding of phys.hi for PCI-PCI bridge regs */ 156 pci_decompose_tag(pc, tag, &b, &d, &f); 157 bdf = (b << 16) | (d << 11) | (f << 8); 158 159 for (bridge = OF_child(pcie); bridge; bridge = OF_peer(bridge)) { 160 const int ethernet = 161 of_find_firstchild_byname(bridge, "ethernet"); 162 if (ethernet == -1) { 163 continue; 164 } 165 const u_int *data = fdtbus_get_prop(ethernet, "reg", &len); 166 if (data == NULL || len < 4) { 167 continue; 168 } 169 if (bdf != be32toh(data[0])) { 170 continue; 171 } 172 173 return OF_getprop(ethernet, "local-mac-address", 174 eaddr, ETHER_ADDR_LEN); 175 } 176 177 return -1; 178 } 179 180 static void 181 apple_platform_device_register(device_t self, void *aux) 182 { 183 prop_dictionary_t prop = device_properties(self); 184 uint8_t eaddr[ETHER_ADDR_LEN]; 185 int len; 186 187 if (device_is_a(self, "cpu")) { 188 struct fdt_attach_args * const faa = aux; 189 bus_addr_t cpuid; 190 191 if (fdtbus_get_reg(faa->faa_phandle, 0, &cpuid, NULL) != 0) { 192 cpuid = 0; 193 } 194 195 /* 196 * On Apple M1 (and hopefully later models), AFF2 is 0 for 197 * efficiency and 1 for performance cores. Use this value 198 * to provide a fake DMIPS/MHz value -- the actual number 199 * only matters in relation to the value presented by other 200 * cores. 201 */ 202 const u_int aff2 = __SHIFTOUT(cpuid, MPIDR_AFF2); 203 prop_dictionary_set_uint32(prop, "capacity_dmips_mhz", aff2); 204 return; 205 } 206 207 if (device_is_a(self, "bge") && 208 device_is_a(device_parent(self), "pci")) { 209 struct pci_attach_args * const pa = aux; 210 211 len = apple_platform_get_mac_address(pa->pa_pc, pa->pa_tag, 212 eaddr); 213 if (len == ETHER_ADDR_LEN) { 214 prop_dictionary_set_bool(prop, "without-seeprom", true); 215 prop_dictionary_set_data(prop, "mac-address", eaddr, 216 sizeof(eaddr)); 217 } 218 return; 219 } 220 } 221 222 static const struct arm_platform apple_arm_platform = { 223 .ap_devmap = apple_platform_devmap, 224 .ap_bootstrap = apple_platform_bootstrap, 225 .ap_init_attach_args = apple_platform_init_attach_args, 226 .ap_reset = psci_fdt_reset, 227 .ap_delay = gtmr_delay, 228 .ap_uart_freq = arm_platform_uart_freq, 229 .ap_device_register = apple_platform_device_register, 230 .ap_mpstart = arm_fdt_cpu_mpstart, 231 }; 232 233 ARM_PLATFORM(apple_arm, "apple,arm-platform", &apple_arm_platform); 234
Indexes created Mon Sep 22 13:09:51 GMT 2025