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         "\0hcall-tce";
  70     uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};
  71     int i;
  72     char *modelname;
  73     int ret;
  74
  75 #define _FDT(exp) \
  76     do { \
  77         int ret = (exp);                                           \
  78         if (ret < 0) {                                             \
  79             fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
  80                     #exp, fdt_strerror(ret));                      \
  81             exit(1);                                               \
  82         }                                                          \
  83     } while (0)
  84
  85     fdt = qemu_mallocz(FDT_MAX_SIZE);
  86     _FDT((fdt_create(fdt, FDT_MAX_SIZE)));
  87
  88     _FDT((fdt_finish_reservemap(fdt)));
  89
  90     /* Root node */
  91     _FDT((fdt_begin_node(fdt, "")));
  92     _FDT((fdt_property_string(fdt, "device_type", "chrp")));
  93     _FDT((fdt_property_string(fdt, "model", "qemu,emulated-pSeries-LPAR")));
  94
  95     _FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
  96     _FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
  97
  98     /* /chosen */
  99     _FDT((fdt_begin_node(fdt, "chosen")));
 100
 101     _FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
 102     _FDT((fdt_property(fdt, "linux,initrd-start",
 103                        &start_prop, sizeof(start_prop))));
 104     _FDT((fdt_property(fdt, "linux,initrd-end",
 105                        &end_prop, sizeof(end_prop))));
 106
 107     _FDT((fdt_end_node(fdt)));
 108
 109     /* memory node */
 110     _FDT((fdt_begin_node(fdt, "memory@0")));
 111
 112     _FDT((fdt_property_string(fdt, "device_type", "memory")));
 113     _FDT((fdt_property(fdt, "reg",
 114                        mem_reg_property, sizeof(mem_reg_property))));
 115
 116     _FDT((fdt_end_node(fdt)));
 117
 118     /* cpus */
 119     _FDT((fdt_begin_node(fdt, "cpus")));
 120
 121     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 122     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 123
 124     modelname = qemu_strdup(cpu_model);
 125
 126     for (i = 0; i < strlen(modelname); i++) {
 127         modelname[i] = toupper(modelname[i]);
 128     }
 129
 130     for (i = 0; i < smp_cpus; i++) {
 131         CPUState *env = envs[i];
 132         uint32_t gserver_prop[] = {cpu_to_be32(i), 0}; /* HACK! */
 133         char *nodename;
 134         uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
 135                            0xffffffff, 0xffffffff};
 136
 137         if (asprintf(&nodename, "%s@%x", modelname, i) < 0) {
 138             fprintf(stderr, "Allocation failure\n");
 139             exit(1);
 140         }
 141
 142         _FDT((fdt_begin_node(fdt, nodename)));
 143
 144         free(nodename);
 145
 146         _FDT((fdt_property_cell(fdt, "reg", i)));
 147         _FDT((fdt_property_string(fdt, "device_type", "cpu")));
 148
 149         _FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
 150         _FDT((fdt_property_cell(fdt, "dcache-block-size",
 151                                 env->dcache_line_size)));
 152         _FDT((fdt_property_cell(fdt, "icache-block-size",
 153                                 env->icache_line_size)));
 154         _FDT((fdt_property_cell(fdt, "timebase-frequency", TIMEBASE_FREQ)));
 155         /* Hardcode CPU frequency for now.  It's kind of arbitrary on
 156          * full emu, for kvm we should copy it from the host */
 157         _FDT((fdt_property_cell(fdt, "clock-frequency", 1000000000)));
 158         _FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
 159         _FDT((fdt_property(fdt, "ibm,pft-size",
 160                            pft_size_prop, sizeof(pft_size_prop))));
 161         _FDT((fdt_property_string(fdt, "status", "okay")));
 162         _FDT((fdt_property(fdt, "64-bit", NULL, 0)));
 163         _FDT((fdt_property_cell(fdt, "ibm,ppc-interrupt-server#s", i)));
 164         _FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
 165                            gserver_prop, sizeof(gserver_prop))));
 166
 167         if (envs[i]->mmu_model & POWERPC_MMU_1TSEG) {
 168             _FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
 169                                segs, sizeof(segs))));
 170         }
 171
 172         _FDT((fdt_end_node(fdt)));
 173     }
 174
 175     qemu_free(modelname);
 176
 177     _FDT((fdt_end_node(fdt)));
 178
 179     /* RTAS */
 180     _FDT((fdt_begin_node(fdt, "rtas")));
 181
 182     _FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
 183                        sizeof(hypertas_prop))));
 184
 185     _FDT((fdt_end_node(fdt)));
 186
 187     /* interrupt controller */
 188     _FDT((fdt_begin_node(fdt, "interrupt-controller@0")));
 189
 190     _FDT((fdt_property_string(fdt, "device_type",
 191                               "PowerPC-External-Interrupt-Presentation")));
 192     _FDT((fdt_property_string(fdt, "compatible", "IBM,ppc-xicp")));
 193     _FDT((fdt_property_cell(fdt, "reg", 0)));
 194     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 195     _FDT((fdt_property(fdt, "ibm,interrupt-server-ranges",
 196                        interrupt_server_ranges_prop,
 197                        sizeof(interrupt_server_ranges_prop))));
 198
 199     _FDT((fdt_end_node(fdt)));
 200
 201     /* vdevice */
 202     _FDT((fdt_begin_node(fdt, "vdevice")));
 203
 204     _FDT((fdt_property_string(fdt, "device_type", "vdevice")));
 205     _FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
 206     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 207     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 208     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
 209     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 210
 211     _FDT((fdt_end_node(fdt)));
 212
 213     _FDT((fdt_end_node(fdt))); /* close root node */
 214     _FDT((fdt_finish(fdt)));
 215
 216     /* re-expand to allow for further tweaks */
 217     _FDT((fdt_open_into(fdt, fdt, FDT_MAX_SIZE)));
 218
 219     ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
 220     if (ret < 0) {
 221         fprintf(stderr, "couldn't setup vio devices in fdt\n");
 222         exit(1);
 223     }
 224
 225     /* RTAS */
 226     ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
 227     if (ret < 0) {
 228         fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
 229     }
 230
 231     _FDT((fdt_pack(fdt)));
 232
 233     *fdt_size = fdt_totalsize(fdt);
 234
 235     return fdt;
 236 }
 237
 238 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 239 {
 240     return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
 241 }
 242
 243 static void emulate_spapr_hypercall(CPUState *env)
 244 {
 245     env->gpr[3] = spapr_hypercall(env, env->gpr[3], &env->gpr[4]);
 246 }
 247
 248 /* pSeries LPAR / sPAPR hardware init */
 249 static void ppc_spapr_init(ram_addr_t ram_size,
 250                            const char *boot_device,
 251                            const char *kernel_filename,
 252                            const char *kernel_cmdline,
 253                            const char *initrd_filename,
 254                            const char *cpu_model)
 255 {
 256     CPUState *envs[MAX_CPUS];
 257     void *fdt, *htab;
 258     int i;
 259     ram_addr_t ram_offset;
 260     target_phys_addr_t fdt_addr, rtas_addr;
 261     uint32_t kernel_base, initrd_base;
 262     long kernel_size, initrd_size, htab_size, rtas_size;
 263     long pteg_shift = 17;
 264     int fdt_size;
 265     char *filename;
 266     int irq = 16;
 267
 268     spapr = qemu_malloc(sizeof(*spapr));
 269     cpu_ppc_hypercall = emulate_spapr_hypercall;
 270
 271     /* We place the device tree just below either the top of RAM, or
 272      * 2GB, so that it can be processed with 32-bit code if
 273      * necessary */
 274     fdt_addr = MIN(ram_size, 0x80000000) - FDT_MAX_SIZE;
 275     /* RTAS goes just below that */
 276     rtas_addr = fdt_addr - RTAS_MAX_SIZE;
 277
 278     /* init CPUs */
 279     if (cpu_model == NULL) {
 280         cpu_model = "POWER7";
 281     }
 282     for (i = 0; i < smp_cpus; i++) {
 283         CPUState *env = cpu_init(cpu_model);
 284
 285         if (!env) {
 286             fprintf(stderr, "Unable to find PowerPC CPU definition\n");
 287             exit(1);
 288         }
 289         /* Set time-base frequency to 512 MHz */
 290         cpu_ppc_tb_init(env, TIMEBASE_FREQ);
 291         qemu_register_reset((QEMUResetHandler *)&cpu_reset, env);
 292
 293         env->hreset_vector = 0x60;
 294         env->hreset_excp_prefix = 0;
 295         env->gpr[3] = i;
 296
 297         envs[i] = env;
 298     }
 299
 300     /* allocate RAM */
 301     ram_offset = qemu_ram_alloc(NULL, "ppc_spapr.ram", ram_size);
 302     cpu_register_physical_memory(0, ram_size, ram_offset);
 303
 304     /* allocate hash page table.  For now we always make this 16mb,
 305      * later we should probably make it scale to the size of guest
 306      * RAM */
 307     htab_size = 1ULL << (pteg_shift + 7);
 308     htab = qemu_mallocz(htab_size);
 309
 310     for (i = 0; i < smp_cpus; i++) {
 311         envs[i]->external_htab = htab;
 312         envs[i]->htab_base = -1;
 313         envs[i]->htab_mask = htab_size - 1;
 314     }
 315
 316     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
 317     rtas_size = load_image_targphys(filename, rtas_addr, ram_size - rtas_addr);
 318     if (rtas_size < 0) {
 319         hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 320         exit(1);
 321     }
 322     qemu_free(filename);
 323
 324     /* Set up Interrupt Controller */
 325     spapr->icp = xics_system_init(smp_cpus, envs, XICS_IRQS);
 326
 327     /* Set up VIO bus */
 328     spapr->vio_bus = spapr_vio_bus_init();
 329
 330     for (i = 0; i < MAX_SERIAL_PORTS; i++, irq++) {
 331         if (serial_hds[i]) {
 332             spapr_vty_create(spapr->vio_bus, i, serial_hds[i],
 333                              xics_find_qirq(spapr->icp, irq), irq);
 334         }
 335     }
 336
 337     if (kernel_filename) {
 338         uint64_t lowaddr = 0;
 339
 340         kernel_base = KERNEL_LOAD_ADDR;
 341
 342         kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
 343                                NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0);
 344         if (kernel_size < 0) {
 345             kernel_size = load_image_targphys(kernel_filename, kernel_base,
 346                                               ram_size - kernel_base);
 347         }
 348         if (kernel_size < 0) {
 349             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 350                     kernel_filename);
 351             exit(1);
 352         }
 353
 354         /* load initrd */
 355         if (initrd_filename) {
 356             initrd_base = INITRD_LOAD_ADDR;
 357             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 358                                               ram_size - initrd_base);
 359             if (initrd_size < 0) {
 360                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 361                         initrd_filename);
 362                 exit(1);
 363             }
 364         } else {
 365             initrd_base = 0;
 366             initrd_size = 0;
 367         }
 368     } else {
 369         fprintf(stderr, "pSeries machine needs -kernel for now");
 370         exit(1);
 371     }
 372
 373     /* Prepare the device tree */
 374     fdt = spapr_create_fdt(&fdt_size, ram_size, cpu_model, envs, spapr,
 375                            initrd_base, initrd_size, kernel_cmdline,
 376                            rtas_addr, rtas_size, pteg_shift + 7);
 377     assert(fdt != NULL);
 378
 379     cpu_physical_memory_write(fdt_addr, fdt, fdt_size);
 380
 381     qemu_free(fdt);
 382
 383     envs[0]->gpr[3] = fdt_addr;
 384     envs[0]->gpr[5] = 0;
 385     envs[0]->hreset_vector = kernel_base;
 386 }
 387
 388 static QEMUMachine spapr_machine = {
 389     .name = "pseries",
 390     .desc = "pSeries Logical Partition (PAPR compliant)",
 391     .init = ppc_spapr_init,
 392     .max_cpus = MAX_CPUS,
 393     .no_vga = 1,
 394     .no_parallel = 1,
 395 };
 396
 397 static void spapr_machine_init(void)
 398 {
 399     qemu_register_machine(&spapr_machine);
 400 }
 401
 402 machine_init(spapr_machine_init);