hw/spapr.c

   1 /*
   2  * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
   3  *
   4  * Copyright (c) 2004-2007 Fabrice Bellard
   5  * Copyright (c) 2007 Jocelyn Mayer
   6  * Copyright (c) 2010 David Gibson, IBM Corporation.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  *
  26  */
  27 #include "sysemu.h"
  28 #include "hw.h"
  29 #include "elf.h"
  30
  31 #include "hw/boards.h"
  32 #include "hw/ppc.h"
  33 #include "hw/loader.h"
  34
  35 #include "hw/spapr.h"
  36 #include "hw/spapr_vio.h"
  37 #include "hw/xics.h"
  38
  39 #include <libfdt.h>
  40
  41 #define KERNEL_LOAD_ADDR        0x00000000
  42 #define INITRD_LOAD_ADDR        0x02800000
  43 #define FDT_MAX_SIZE            0x10000
  44 #define RTAS_MAX_SIZE           0x10000
  45
  46 #define TIMEBASE_FREQ           512000000ULL
  47
  48 #define MAX_CPUS                32
  49 #define XICS_IRQS               1024
  50
  51 sPAPREnvironment *spapr;
  52
  53 static void *spapr_create_fdt(int *fdt_size, ram_addr_t ramsize,
  54                               const char *cpu_model, CPUState *envs[],
  55                               sPAPREnvironment *spapr,
  56                               target_phys_addr_t initrd_base,
  57                               target_phys_addr_t initrd_size,
  58                               const char *kernel_cmdline,
  59                               target_phys_addr_t rtas_addr,
  60                               target_phys_addr_t rtas_size,
  61                               long hash_shift)
  62 {
  63     void *fdt;
  64     uint64_t mem_reg_property[] = { 0, cpu_to_be64(ramsize) };
  65     uint32_t start_prop = cpu_to_be32(initrd_base);
  66     uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size);
  67     uint32_t pft_size_prop[] = {0, cpu_to_be32(hash_shift)};
  68     char hypertas_prop[] = "hcall-pft\0hcall-term\0hcall-dabr\0hcall-interrupt";
  69     uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};
  70     int i;
  71     char *modelname;
  72     int ret;
  73
  74 #define _FDT(exp) \
  75     do { \
  76         int ret = (exp);                                           \
  77         if (ret < 0) {                                             \
  78             fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
  79                     #exp, fdt_strerror(ret));                      \
  80             exit(1);                                               \
  81         }                                                          \
  82     } while (0)
  83
  84     fdt = qemu_mallocz(FDT_MAX_SIZE);
  85     _FDT((fdt_create(fdt, FDT_MAX_SIZE)));
  86
  87     _FDT((fdt_finish_reservemap(fdt)));
  88
  89     /* Root node */
  90     _FDT((fdt_begin_node(fdt, "")));
  91     _FDT((fdt_property_string(fdt, "device_type", "chrp")));
  92     _FDT((fdt_property_string(fdt, "model", "qemu,emulated-pSeries-LPAR")));
  93
  94     _FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
  95     _FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
  96
  97     /* /chosen */
  98     _FDT((fdt_begin_node(fdt, "chosen")));
  99
 100     _FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
 101     _FDT((fdt_property(fdt, "linux,initrd-start",
 102                        &start_prop, sizeof(start_prop))));
 103     _FDT((fdt_property(fdt, "linux,initrd-end",
 104                        &end_prop, sizeof(end_prop))));
 105
 106     _FDT((fdt_end_node(fdt)));
 107
 108     /* memory node */
 109     _FDT((fdt_begin_node(fdt, "memory@0")));
 110
 111     _FDT((fdt_property_string(fdt, "device_type", "memory")));
 112     _FDT((fdt_property(fdt, "reg",
 113                        mem_reg_property, sizeof(mem_reg_property))));
 114
 115     _FDT((fdt_end_node(fdt)));
 116
 117     /* cpus */
 118     _FDT((fdt_begin_node(fdt, "cpus")));
 119
 120     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 121     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 122
 123     modelname = qemu_strdup(cpu_model);
 124
 125     for (i = 0; i < strlen(modelname); i++) {
 126         modelname[i] = toupper(modelname[i]);
 127     }
 128
 129     for (i = 0; i < smp_cpus; i++) {
 130         CPUState *env = envs[i];
 131         uint32_t gserver_prop[] = {cpu_to_be32(i), 0}; /* HACK! */
 132         char *nodename;
 133         uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
 134                            0xffffffff, 0xffffffff};
 135
 136         if (asprintf(&nodename, "%s@%x", modelname, i) < 0) {
 137             fprintf(stderr, "Allocation failure\n");
 138             exit(1);
 139         }
 140
 141         _FDT((fdt_begin_node(fdt, nodename)));
 142
 143         free(nodename);
 144
 145         _FDT((fdt_property_cell(fdt, "reg", i)));
 146         _FDT((fdt_property_string(fdt, "device_type", "cpu")));
 147
 148         _FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
 149         _FDT((fdt_property_cell(fdt, "dcache-block-size",
 150                                 env->dcache_line_size)));
 151         _FDT((fdt_property_cell(fdt, "icache-block-size",
 152                                 env->icache_line_size)));
 153         _FDT((fdt_property_cell(fdt, "timebase-frequency", TIMEBASE_FREQ)));
 154         /* Hardcode CPU frequency for now.  It's kind of arbitrary on
 155          * full emu, for kvm we should copy it from the host */
 156         _FDT((fdt_property_cell(fdt, "clock-frequency", 1000000000)));
 157         _FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
 158         _FDT((fdt_property(fdt, "ibm,pft-size",
 159                            pft_size_prop, sizeof(pft_size_prop))));
 160         _FDT((fdt_property_string(fdt, "status", "okay")));
 161         _FDT((fdt_property(fdt, "64-bit", NULL, 0)));
 162         _FDT((fdt_property_cell(fdt, "ibm,ppc-interrupt-server#s", i)));
 163         _FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
 164                            gserver_prop, sizeof(gserver_prop))));
 165
 166         if (envs[i]->mmu_model & POWERPC_MMU_1TSEG) {
 167             _FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
 168                                segs, sizeof(segs))));
 169         }
 170
 171         _FDT((fdt_end_node(fdt)));
 172     }
 173
 174     qemu_free(modelname);
 175
 176     _FDT((fdt_end_node(fdt)));
 177
 178     /* RTAS */
 179     _FDT((fdt_begin_node(fdt, "rtas")));
 180
 181     _FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
 182                        sizeof(hypertas_prop))));
 183
 184     _FDT((fdt_end_node(fdt)));
 185
 186     /* interrupt controller */
 187     _FDT((fdt_begin_node(fdt, "interrupt-controller@0")));
 188
 189     _FDT((fdt_property_string(fdt, "device_type",
 190                               "PowerPC-External-Interrupt-Presentation")));
 191     _FDT((fdt_property_string(fdt, "compatible", "IBM,ppc-xicp")));
 192     _FDT((fdt_property_cell(fdt, "reg", 0)));
 193     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 194     _FDT((fdt_property(fdt, "ibm,interrupt-server-ranges",
 195                        interrupt_server_ranges_prop,
 196                        sizeof(interrupt_server_ranges_prop))));
 197
 198     _FDT((fdt_end_node(fdt)));
 199
 200     /* vdevice */
 201     _FDT((fdt_begin_node(fdt, "vdevice")));
 202
 203     _FDT((fdt_property_string(fdt, "device_type", "vdevice")));
 204     _FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
 205     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 206     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 207     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
 208     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 209
 210     _FDT((fdt_end_node(fdt)));
 211
 212     _FDT((fdt_end_node(fdt))); /* close root node */
 213     _FDT((fdt_finish(fdt)));
 214
 215     /* re-expand to allow for further tweaks */
 216     _FDT((fdt_open_into(fdt, fdt, FDT_MAX_SIZE)));
 217
 218     ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
 219     if (ret < 0) {
 220         fprintf(stderr, "couldn't setup vio devices in fdt\n");
 221         exit(1);
 222     }
 223
 224     /* RTAS */
 225     ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
 226     if (ret < 0) {
 227         fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
 228     }
 229
 230     _FDT((fdt_pack(fdt)));
 231
 232     *fdt_size = fdt_totalsize(fdt);
 233
 234     return fdt;
 235 }
 236
 237 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 238 {
 239     return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
 240 }
 241
 242 static void emulate_spapr_hypercall(CPUState *env)
 243 {
 244     env->gpr[3] = spapr_hypercall(env, env->gpr[3], &env->gpr[4]);
 245 }
 246
 247 /* pSeries LPAR / sPAPR hardware init */
 248 static void ppc_spapr_init(ram_addr_t ram_size,
 249                            const char *boot_device,
 250                            const char *kernel_filename,
 251                            const char *kernel_cmdline,
 252                            const char *initrd_filename,
 253                            const char *cpu_model)
 254 {
 255     CPUState *envs[MAX_CPUS];
 256     void *fdt, *htab;
 257     int i;
 258     ram_addr_t ram_offset;
 259     target_phys_addr_t fdt_addr, rtas_addr;
 260     uint32_t kernel_base, initrd_base;
 261     long kernel_size, initrd_size, htab_size, rtas_size;
 262     long pteg_shift = 17;
 263     int fdt_size;
 264     char *filename;
 265
 266     spapr = qemu_malloc(sizeof(*spapr));
 267     cpu_ppc_hypercall = emulate_spapr_hypercall;
 268
 269     /* We place the device tree just below either the top of RAM, or
 270      * 2GB, so that it can be processed with 32-bit code if
 271      * necessary */
 272     fdt_addr = MIN(ram_size, 0x80000000) - FDT_MAX_SIZE;
 273     /* RTAS goes just below that */
 274     rtas_addr = fdt_addr - RTAS_MAX_SIZE;
 275
 276     /* init CPUs */
 277     if (cpu_model == NULL) {
 278         cpu_model = "POWER7";
 279     }
 280     for (i = 0; i < smp_cpus; i++) {
 281         CPUState *env = cpu_init(cpu_model);
 282
 283         if (!env) {
 284             fprintf(stderr, "Unable to find PowerPC CPU definition\n");
 285             exit(1);
 286         }
 287         /* Set time-base frequency to 512 MHz */
 288         cpu_ppc_tb_init(env, TIMEBASE_FREQ);
 289         qemu_register_reset((QEMUResetHandler *)&cpu_reset, env);
 290
 291         env->hreset_vector = 0x60;
 292         env->hreset_excp_prefix = 0;
 293         env->gpr[3] = i;
 294
 295         envs[i] = env;
 296     }
 297
 298     /* allocate RAM */
 299     ram_offset = qemu_ram_alloc(NULL, "ppc_spapr.ram", ram_size);
 300     cpu_register_physical_memory(0, ram_size, ram_offset);
 301
 302     /* allocate hash page table.  For now we always make this 16mb,
 303      * later we should probably make it scale to the size of guest
 304      * RAM */
 305     htab_size = 1ULL << (pteg_shift + 7);
 306     htab = qemu_mallocz(htab_size);
 307
 308     for (i = 0; i < smp_cpus; i++) {
 309         envs[i]->external_htab = htab;
 310         envs[i]->htab_base = -1;
 311         envs[i]->htab_mask = htab_size - 1;
 312     }
 313
 314     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
 315     rtas_size = load_image_targphys(filename, rtas_addr, ram_size - rtas_addr);
 316     if (rtas_size < 0) {
 317         hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 318         exit(1);
 319     }
 320     qemu_free(filename);
 321
 322     /* Set up Interrupt Controller */
 323     spapr->icp = xics_system_init(smp_cpus, envs, XICS_IRQS);
 324
 325     /* Set up VIO bus */
 326     spapr->vio_bus = spapr_vio_bus_init();
 327
 328     for (i = 0; i < MAX_SERIAL_PORTS; i++) {
 329         if (serial_hds[i]) {
 330             spapr_vty_create(spapr->vio_bus, i, serial_hds[i]);
 331         }
 332     }
 333
 334     if (kernel_filename) {
 335         uint64_t lowaddr = 0;
 336
 337         kernel_base = KERNEL_LOAD_ADDR;
 338
 339         kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
 340                                NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0);
 341         if (kernel_size < 0) {
 342             kernel_size = load_image_targphys(kernel_filename, kernel_base,
 343                                               ram_size - kernel_base);
 344         }
 345         if (kernel_size < 0) {
 346             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 347                     kernel_filename);
 348             exit(1);
 349         }
 350
 351         /* load initrd */
 352         if (initrd_filename) {
 353             initrd_base = INITRD_LOAD_ADDR;
 354             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 355                                               ram_size - initrd_base);
 356             if (initrd_size < 0) {
 357                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 358                         initrd_filename);
 359                 exit(1);
 360             }
 361         } else {
 362             initrd_base = 0;
 363             initrd_size = 0;
 364         }
 365     } else {
 366         fprintf(stderr, "pSeries machine needs -kernel for now");
 367         exit(1);
 368     }
 369
 370     /* Prepare the device tree */
 371     fdt = spapr_create_fdt(&fdt_size, ram_size, cpu_model, envs, spapr,
 372                            initrd_base, initrd_size, kernel_cmdline,
 373                            rtas_addr, rtas_size, pteg_shift + 7);
 374     assert(fdt != NULL);
 375
 376     cpu_physical_memory_write(fdt_addr, fdt, fdt_size);
 377
 378     qemu_free(fdt);
 379
 380     envs[0]->gpr[3] = fdt_addr;
 381     envs[0]->gpr[5] = 0;
 382     envs[0]->hreset_vector = kernel_base;
 383 }
 384
 385 static QEMUMachine spapr_machine = {
 386     .name = "pseries",
 387     .desc = "pSeries Logical Partition (PAPR compliant)",
 388     .init = ppc_spapr_init,
 389     .max_cpus = MAX_CPUS,
 390     .no_vga = 1,
 391     .no_parallel = 1,
 392 };
 393
 394 static void spapr_machine_init(void)
 395 {
 396     qemu_register_machine(&spapr_machine);
 397 }
 398
 399 machine_init(spapr_machine_init);