apple_platform.c revision 1.7
1 /* $NetBSD: apple_platform.c,v 1.7 2025/09/06 21:02:40 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 1.7 2025/09/06 21:02:40 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_platform.h> 40 41 #include <arm/fdt/arm_fdtvar.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <machine/bootconfig.h> 46 47 #include <net/if_ether.h> 48 49 #include <dev/pci/pcivar.h> 50 #include <machine/pci_machdep.h> 51 52 #include <arm/cpufunc.h> 53 54 #include <arm/cortex/gtmr_var.h> 55 56 #include <arm/arm/psci.h> 57 #include <arm/fdt/psci_fdtvar.h> 58 59 #include <libfdt.h> 60 61 #include <arch/evbarm/fdt/platform.h> 62 63 extern struct bus_space arm_generic_bs_tag; 64 65 static struct bus_space apple_nonposted_bs_tag; 66 67 struct arm32_bus_dma_tag apple_coherent_dma_tag; 68 static struct arm32_dma_range apple_coherent_ranges[] = { 69 [0] = { 70 .dr_sysbase = 0, 71 .dr_busbase = 0, 72 .dr_len = UINTPTR_MAX, 73 .dr_flags = _BUS_DMAMAP_COHERENT, 74 } 75 }; 76 77 static int 78 apple_nonposted_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag, 79 bus_space_handle_t *bshp) 80 { 81 if (flag == 0) { 82 flag |= BUS_SPACE_MAP_NONPOSTED; 83 } 84 85 return bus_space_map(&arm_generic_bs_tag, bpa, size, flag, bshp); 86 } 87 88 static void 89 apple_platform_bootstrap(void) 90 { 91 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 92 93 apple_nonposted_bs_tag = arm_generic_bs_tag; 94 apple_nonposted_bs_tag.bs_map = apple_nonposted_bs_map; 95 96 apple_coherent_dma_tag = arm_generic_dma_tag; 97 apple_coherent_dma_tag._ranges = apple_coherent_ranges; 98 apple_coherent_dma_tag._nranges = __arraycount(apple_coherent_ranges); 99 100 arm_fdt_cpu_bootstrap(); 101 } 102 103 static void 104 apple_platform_init_attach_args(struct fdt_attach_args *faa) 105 { 106 faa->faa_bst = &apple_nonposted_bs_tag; 107 faa->faa_dmat = &apple_coherent_dma_tag; 108 } 109 110 static const struct pmap_devmap * 111 apple_platform_devmap(void) 112 { 113 /* Size this to hold possible entries for the UART and SMP spin-table */ 114 static struct pmap_devmap devmap[] = { 115 DEVMAP_ENTRY_END, 116 DEVMAP_ENTRY_END, 117 DEVMAP_ENTRY_END 118 }; 119 bus_addr_t uart_base; 120 vaddr_t devmap_va = KERNEL_IO_VBASE; 121 u_int devmap_index = 0; 122 uint64_t release_addr; 123 int phandle; 124 125 phandle = fdtbus_get_stdout_phandle(); 126 if (phandle > 0 && fdtbus_get_reg(phandle, 0, &uart_base, NULL) == 0) { 127 devmap[devmap_index].pd_pa = DEVMAP_ALIGN(uart_base); 128 devmap[devmap_index].pd_va = DEVMAP_ALIGN(devmap_va); 129 devmap[devmap_index].pd_size = DEVMAP_SIZE(L3_SIZE); 130 devmap[devmap_index].pd_prot = VM_PROT_READ | VM_PROT_WRITE; 131 devmap[devmap_index].pd_flags = PMAP_DEV_NP; 132 devmap_va = DEVMAP_SIZE(devmap[devmap_index].pd_va + 133 devmap[devmap_index].pd_size); 134 devmap_index++; 135 } 136 137 /* XXX hopefully all release addresses are in the same 2M */ 138 phandle = OF_finddevice("/cpus/cpu@1"); 139 if (phandle > 0 && 140 of_getprop_uint64(phandle, "cpu-release-addr", &release_addr) == 0) { 141 devmap[devmap_index].pd_pa = DEVMAP_ALIGN(release_addr); 142 devmap[devmap_index].pd_va = DEVMAP_ALIGN(devmap_va); 143 devmap[devmap_index].pd_size = DEVMAP_SIZE(L2_SIZE); 144 devmap[devmap_index].pd_prot = VM_PROT_READ | VM_PROT_WRITE; 145 devmap[devmap_index].pd_flags = PMAP_WRITE_BACK; 146 devmap_va = DEVMAP_SIZE(devmap[devmap_index].pd_va + 147 devmap[devmap_index].pd_size); 148 devmap_index++; 149 } 150 151 return devmap; 152 } 153 154 static u_int 155 apple_platform_uart_freq(void) 156 { 157 return 0; 158 } 159 160 static int 161 apple_platform_get_mac_address(pci_chipset_tag_t pc, pcitag_t tag, 162 uint8_t *eaddr) 163 { 164 int b, d, f; 165 int bridge, len; 166 u_int bdf; 167 168 const int pcie = of_find_bycompat(OF_finddevice("/"), "apple,pcie"); 169 if (pcie == -1) { 170 return -1; 171 } 172 173 /* Convert PCI tag to encoding of phys.hi for PCI-PCI bridge regs */ 174 pci_decompose_tag(pc, tag, &b, &d, &f); 175 bdf = (b << 16) | (d << 11) | (f << 8); 176 177 for (bridge = OF_child(pcie); bridge; bridge = OF_peer(bridge)) { 178 const int ethernet = 179 of_find_firstchild_byname(bridge, "ethernet"); 180 if (ethernet == -1) { 181 continue; 182 } 183 const u_int *data = fdtbus_get_prop(ethernet, "reg", &len); 184 if (data == NULL || len < 4) { 185 continue; 186 } 187 if (bdf != be32toh(data[0])) { 188 continue; 189 } 190 191 return OF_getprop(ethernet, "local-mac-address", 192 eaddr, ETHER_ADDR_LEN); 193 } 194 195 return -1; 196 } 197 198 static void 199 apple_platform_device_register(device_t self, void *aux) 200 { 201 prop_dictionary_t prop = device_properties(self); 202 uint8_t eaddr[ETHER_ADDR_LEN]; 203 int len; 204 205 if (device_is_a(self, "cpu")) { 206 struct fdt_attach_args * const faa = aux; 207 bus_addr_t cpuid; 208 209 if (fdtbus_get_reg(faa->faa_phandle, 0, &cpuid, NULL) != 0) { 210 cpuid = 0; 211 } 212 213 /* 214 * On Apple M1 (and hopefully later models), AFF2 is 0 for 215 * efficiency and 1 for performance cores. Use this value 216 * to provide a fake DMIPS/MHz value -- the actual number 217 * only matters in relation to the value presented by other 218 * cores. 219 */ 220 const u_int aff2 = __SHIFTOUT(cpuid, MPIDR_AFF2); 221 prop_dictionary_set_uint32(prop, "capacity_dmips_mhz", aff2); 222 return; 223 } 224 225 if (device_is_a(self, "bge") && 226 device_is_a(device_parent(self), "pci")) { 227 struct pci_attach_args * const pa = aux; 228 229 len = apple_platform_get_mac_address(pa->pa_pc, pa->pa_tag, 230 eaddr); 231 if (len == ETHER_ADDR_LEN) { 232 prop_dictionary_set_bool(prop, "without-seeprom", true); 233 prop_dictionary_set_data(prop, "mac-address", eaddr, 234 sizeof(eaddr)); 235 } 236 return; 237 } 238 } 239 240 static const struct fdt_platform apple_fdt_platform = { 241 .fp_devmap = apple_platform_devmap, 242 .fp_bootstrap = apple_platform_bootstrap, 243 .fp_init_attach_args = apple_platform_init_attach_args, 244 .fp_reset = psci_fdt_reset, 245 .fp_delay = gtmr_delay, 246 .fp_uart_freq = apple_platform_uart_freq, 247 .fp_device_register = apple_platform_device_register, 248 .fp_mpstart = arm_fdt_cpu_mpstart, 249 }; 250 251 FDT_PLATFORM(apple_arm, "apple,arm-platform", &apple_fdt_platform); 252
Indexes created Wed Sep 24 14:09:57 GMT 2025