apple_platform.c revision 1.8
1 /* $NetBSD: apple_platform.c,v 1.8 2025/09/06 22:53:47 thorpej 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 1.8 2025/09/06 22:53:47 thorpej 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 <dev/fdt/fdt_console.h> 40 #include <dev/fdt/fdt_platform.h> 41 42 #include <arm/fdt/arm_fdtvar.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/bootconfig.h> 47 48 #include <net/if_ether.h> 49 50 #include <dev/pci/pcivar.h> 51 #include <machine/pci_machdep.h> 52 53 #include <arm/cpufunc.h> 54 55 #include <arm/cortex/gtmr_var.h> 56 57 #include <arm/arm/psci.h> 58 #include <arm/fdt/psci_fdtvar.h> 59 60 #include <libfdt.h> 61 62 #include <arch/evbarm/fdt/platform.h> 63 64 extern struct bus_space arm_generic_bs_tag; 65 66 static struct bus_space apple_nonposted_bs_tag; 67 68 struct arm32_bus_dma_tag apple_coherent_dma_tag; 69 static struct arm32_dma_range apple_coherent_ranges[] = { 70 [0] = { 71 .dr_sysbase = 0, 72 .dr_busbase = 0, 73 .dr_len = UINTPTR_MAX, 74 .dr_flags = _BUS_DMAMAP_COHERENT, 75 } 76 }; 77 78 static int 79 apple_nonposted_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag, 80 bus_space_handle_t *bshp) 81 { 82 if (flag == 0) { 83 flag |= BUS_SPACE_MAP_NONPOSTED; 84 } 85 86 return bus_space_map(&arm_generic_bs_tag, bpa, size, flag, bshp); 87 } 88 89 static void 90 apple_platform_bootstrap(void) 91 { 92 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 93 94 apple_nonposted_bs_tag = arm_generic_bs_tag; 95 apple_nonposted_bs_tag.bs_map = apple_nonposted_bs_map; 96 97 apple_coherent_dma_tag = arm_generic_dma_tag; 98 apple_coherent_dma_tag._ranges = apple_coherent_ranges; 99 apple_coherent_dma_tag._nranges = __arraycount(apple_coherent_ranges); 100 101 arm_fdt_cpu_bootstrap(); 102 } 103 104 static void 105 apple_platform_init_attach_args(struct fdt_attach_args *faa) 106 { 107 faa->faa_bst = &apple_nonposted_bs_tag; 108 faa->faa_dmat = &apple_coherent_dma_tag; 109 } 110 111 static const struct pmap_devmap * 112 apple_platform_devmap(void) 113 { 114 /* Size this to hold possible entries for the UART and SMP spin-table */ 115 static struct pmap_devmap devmap[] = { 116 DEVMAP_ENTRY_END, 117 DEVMAP_ENTRY_END, 118 DEVMAP_ENTRY_END 119 }; 120 bus_addr_t uart_base; 121 vaddr_t devmap_va = KERNEL_IO_VBASE; 122 u_int devmap_index = 0; 123 uint64_t release_addr; 124 int phandle; 125 126 phandle = fdtbus_get_stdout_phandle(); 127 if (phandle > 0 && fdtbus_get_reg(phandle, 0, &uart_base, NULL) == 0) { 128 devmap[devmap_index].pd_pa = DEVMAP_ALIGN(uart_base); 129 devmap[devmap_index].pd_va = DEVMAP_ALIGN(devmap_va); 130 devmap[devmap_index].pd_size = DEVMAP_SIZE(L3_SIZE); 131 devmap[devmap_index].pd_prot = VM_PROT_READ | VM_PROT_WRITE; 132 devmap[devmap_index].pd_flags = PMAP_DEV_NP; 133 devmap_va = DEVMAP_SIZE(devmap[devmap_index].pd_va + 134 devmap[devmap_index].pd_size); 135 devmap_index++; 136 } 137 138 /* XXX hopefully all release addresses are in the same 2M */ 139 phandle = OF_finddevice("/cpus/cpu@1"); 140 if (phandle > 0 && 141 of_getprop_uint64(phandle, "cpu-release-addr", &release_addr) == 0) { 142 devmap[devmap_index].pd_pa = DEVMAP_ALIGN(release_addr); 143 devmap[devmap_index].pd_va = DEVMAP_ALIGN(devmap_va); 144 devmap[devmap_index].pd_size = DEVMAP_SIZE(L2_SIZE); 145 devmap[devmap_index].pd_prot = VM_PROT_READ | VM_PROT_WRITE; 146 devmap[devmap_index].pd_flags = PMAP_WRITE_BACK; 147 devmap_va = DEVMAP_SIZE(devmap[devmap_index].pd_va + 148 devmap[devmap_index].pd_size); 149 devmap_index++; 150 } 151 152 return devmap; 153 } 154 155 static u_int 156 apple_platform_uart_freq(void) 157 { 158 return 0; 159 } 160 161 static int 162 apple_platform_get_mac_address(pci_chipset_tag_t pc, pcitag_t tag, 163 uint8_t *eaddr) 164 { 165 int b, d, f; 166 int bridge, len; 167 u_int bdf; 168 169 const int pcie = of_find_bycompat(OF_finddevice("/"), "apple,pcie"); 170 if (pcie == -1) { 171 return -1; 172 } 173 174 /* Convert PCI tag to encoding of phys.hi for PCI-PCI bridge regs */ 175 pci_decompose_tag(pc, tag, &b, &d, &f); 176 bdf = (b << 16) | (d << 11) | (f << 8); 177 178 for (bridge = OF_child(pcie); bridge; bridge = OF_peer(bridge)) { 179 const int ethernet = 180 of_find_firstchild_byname(bridge, "ethernet"); 181 if (ethernet == -1) { 182 continue; 183 } 184 const u_int *data = fdtbus_get_prop(ethernet, "reg", &len); 185 if (data == NULL || len < 4) { 186 continue; 187 } 188 if (bdf != be32toh(data[0])) { 189 continue; 190 } 191 192 return OF_getprop(ethernet, "local-mac-address", 193 eaddr, ETHER_ADDR_LEN); 194 } 195 196 return -1; 197 } 198 199 static void 200 apple_platform_device_register(device_t self, void *aux) 201 { 202 prop_dictionary_t prop = device_properties(self); 203 uint8_t eaddr[ETHER_ADDR_LEN]; 204 int len; 205 206 if (device_is_a(self, "cpu")) { 207 struct fdt_attach_args * const faa = aux; 208 bus_addr_t cpuid; 209 210 if (fdtbus_get_reg(faa->faa_phandle, 0, &cpuid, NULL) != 0) { 211 cpuid = 0; 212 } 213 214 /* 215 * On Apple M1 (and hopefully later models), AFF2 is 0 for 216 * efficiency and 1 for performance cores. Use this value 217 * to provide a fake DMIPS/MHz value -- the actual number 218 * only matters in relation to the value presented by other 219 * cores. 220 */ 221 const u_int aff2 = __SHIFTOUT(cpuid, MPIDR_AFF2); 222 prop_dictionary_set_uint32(prop, "capacity_dmips_mhz", aff2); 223 return; 224 } 225 226 if (device_is_a(self, "bge") && 227 device_is_a(device_parent(self), "pci")) { 228 struct pci_attach_args * const pa = aux; 229 230 len = apple_platform_get_mac_address(pa->pa_pc, pa->pa_tag, 231 eaddr); 232 if (len == ETHER_ADDR_LEN) { 233 prop_dictionary_set_bool(prop, "without-seeprom", true); 234 prop_dictionary_set_data(prop, "mac-address", eaddr, 235 sizeof(eaddr)); 236 } 237 return; 238 } 239 } 240 241 static const struct fdt_platform apple_fdt_platform = { 242 .fp_devmap = apple_platform_devmap, 243 .fp_bootstrap = apple_platform_bootstrap, 244 .fp_init_attach_args = apple_platform_init_attach_args, 245 .fp_reset = psci_fdt_reset, 246 .fp_delay = gtmr_delay, 247 .fp_uart_freq = apple_platform_uart_freq, 248 .fp_device_register = apple_platform_device_register, 249 .fp_mpstart = arm_fdt_cpu_mpstart, 250 }; 251 252 FDT_PLATFORM(apple_arm, "apple,arm-platform", &apple_fdt_platform); 253
Indexes created Wed Sep 24 05:09:52 GMT 2025