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
  38 #include <libfdt.h>
  39
  40 #define KERNEL_LOAD_ADDR        0x00000000
  41 #define INITRD_LOAD_ADDR        0x02800000
  42 #define FDT_MAX_SIZE            0x10000
  43 #define RTAS_MAX_SIZE           0x10000
  44
  45 #define TIMEBASE_FREQ           512000000ULL
  46
  47 #define MAX_CPUS                32
  48
  49 sPAPREnvironment *spapr;
  50
  51 static void *spapr_create_fdt(int *fdt_size, ram_addr_t ramsize,
  52                               const char *cpu_model, CPUState *envs[],
  53                               sPAPREnvironment *spapr,
  54                               target_phys_addr_t initrd_base,
  55                               target_phys_addr_t initrd_size,
  56                               const char *kernel_cmdline,
  57                               target_phys_addr_t rtas_addr,
  58                               target_phys_addr_t rtas_size,
  59                               long hash_shift)
  60 {
  61     void *fdt;
  62     uint64_t mem_reg_property[] = { 0, cpu_to_be64(ramsize) };
  63     uint32_t start_prop = cpu_to_be32(initrd_base);
  64     uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size);
  65     uint32_t pft_size_prop[] = {0, cpu_to_be32(hash_shift)};
  66     char hypertas_prop[] = "hcall-pft\0hcall-term";
  67     int i;
  68     char *modelname;
  69     int ret;
  70
  71 #define _FDT(exp) \
  72     do { \
  73         int ret = (exp);                                           \
  74         if (ret < 0) {                                             \
  75             fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
  76                     #exp, fdt_strerror(ret));                      \
  77             exit(1);                                               \
  78         }                                                          \
  79     } while (0)
  80
  81     fdt = qemu_mallocz(FDT_MAX_SIZE);
  82     _FDT((fdt_create(fdt, FDT_MAX_SIZE)));
  83
  84     _FDT((fdt_finish_reservemap(fdt)));
  85
  86     /* Root node */
  87     _FDT((fdt_begin_node(fdt, "")));
  88     _FDT((fdt_property_string(fdt, "device_type", "chrp")));
  89     _FDT((fdt_property_string(fdt, "model", "qemu,emulated-pSeries-LPAR")));
  90
  91     _FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
  92     _FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
  93
  94     /* /chosen */
  95     _FDT((fdt_begin_node(fdt, "chosen")));
  96
  97     _FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
  98     _FDT((fdt_property(fdt, "linux,initrd-start",
  99                        &start_prop, sizeof(start_prop))));
 100     _FDT((fdt_property(fdt, "linux,initrd-end",
 101                        &end_prop, sizeof(end_prop))));
 102
 103     _FDT((fdt_end_node(fdt)));
 104
 105     /* memory node */
 106     _FDT((fdt_begin_node(fdt, "memory@0")));
 107
 108     _FDT((fdt_property_string(fdt, "device_type", "memory")));
 109     _FDT((fdt_property(fdt, "reg",
 110                        mem_reg_property, sizeof(mem_reg_property))));
 111
 112     _FDT((fdt_end_node(fdt)));
 113
 114     /* cpus */
 115     _FDT((fdt_begin_node(fdt, "cpus")));
 116
 117     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 118     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 119
 120     modelname = qemu_strdup(cpu_model);
 121
 122     for (i = 0; i < strlen(modelname); i++) {
 123         modelname[i] = toupper(modelname[i]);
 124     }
 125
 126     for (i = 0; i < smp_cpus; i++) {
 127         CPUState *env = envs[i];
 128         char *nodename;
 129         uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
 130                            0xffffffff, 0xffffffff};
 131
 132         if (asprintf(&nodename, "%s@%x", modelname, i) < 0) {
 133             fprintf(stderr, "Allocation failure\n");
 134             exit(1);
 135         }
 136
 137         _FDT((fdt_begin_node(fdt, nodename)));
 138
 139         free(nodename);
 140
 141         _FDT((fdt_property_cell(fdt, "reg", i)));
 142         _FDT((fdt_property_string(fdt, "device_type", "cpu")));
 143
 144         _FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
 145         _FDT((fdt_property_cell(fdt, "dcache-block-size",
 146                                 env->dcache_line_size)));
 147         _FDT((fdt_property_cell(fdt, "icache-block-size",
 148                                 env->icache_line_size)));
 149         _FDT((fdt_property_cell(fdt, "timebase-frequency", TIMEBASE_FREQ)));
 150         /* Hardcode CPU frequency for now.  It's kind of arbitrary on
 151          * full emu, for kvm we should copy it from the host */
 152         _FDT((fdt_property_cell(fdt, "clock-frequency", 1000000000)));
 153         _FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
 154         _FDT((fdt_property(fdt, "ibm,pft-size",
 155                            pft_size_prop, sizeof(pft_size_prop))));
 156         _FDT((fdt_property_string(fdt, "status", "okay")));
 157         _FDT((fdt_property(fdt, "64-bit", NULL, 0)));
 158
 159         if (envs[i]->mmu_model & POWERPC_MMU_1TSEG) {
 160             _FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
 161                                segs, sizeof(segs))));
 162         }
 163
 164         _FDT((fdt_end_node(fdt)));
 165     }
 166
 167     qemu_free(modelname);
 168
 169     _FDT((fdt_end_node(fdt)));
 170
 171     /* RTAS */
 172     _FDT((fdt_begin_node(fdt, "rtas")));
 173
 174     _FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
 175                        sizeof(hypertas_prop))));
 176
 177     _FDT((fdt_end_node(fdt)));
 178
 179     /* vdevice */
 180     _FDT((fdt_begin_node(fdt, "vdevice")));
 181
 182     _FDT((fdt_property_string(fdt, "device_type", "vdevice")));
 183     _FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
 184     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 185     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 186
 187     _FDT((fdt_end_node(fdt)));
 188
 189     _FDT((fdt_end_node(fdt))); /* close root node */
 190     _FDT((fdt_finish(fdt)));
 191
 192     /* re-expand to allow for further tweaks */
 193     _FDT((fdt_open_into(fdt, fdt, FDT_MAX_SIZE)));
 194
 195     ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
 196     if (ret < 0) {
 197         fprintf(stderr, "couldn't setup vio devices in fdt\n");
 198         exit(1);
 199     }
 200
 201     /* RTAS */
 202     ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
 203     if (ret < 0) {
 204         fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
 205     }
 206
 207     _FDT((fdt_pack(fdt)));
 208
 209     *fdt_size = fdt_totalsize(fdt);
 210
 211     return fdt;
 212 }
 213
 214 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 215 {
 216     return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
 217 }
 218
 219 static void emulate_spapr_hypercall(CPUState *env)
 220 {
 221     env->gpr[3] = spapr_hypercall(env, env->gpr[3], &env->gpr[4]);
 222 }
 223
 224 /* pSeries LPAR / sPAPR hardware init */
 225 static void ppc_spapr_init(ram_addr_t ram_size,
 226                            const char *boot_device,
 227                            const char *kernel_filename,
 228                            const char *kernel_cmdline,
 229                            const char *initrd_filename,
 230                            const char *cpu_model)
 231 {
 232     CPUState *envs[MAX_CPUS];
 233     void *fdt, *htab;
 234     int i;
 235     ram_addr_t ram_offset;
 236     target_phys_addr_t fdt_addr, rtas_addr;
 237     uint32_t kernel_base, initrd_base;
 238     long kernel_size, initrd_size, htab_size, rtas_size;
 239     long pteg_shift = 17;
 240     int fdt_size;
 241     char *filename;
 242
 243     spapr = qemu_malloc(sizeof(*spapr));
 244     cpu_ppc_hypercall = emulate_spapr_hypercall;
 245
 246     /* We place the device tree just below either the top of RAM, or
 247      * 2GB, so that it can be processed with 32-bit code if
 248      * necessary */
 249     fdt_addr = MIN(ram_size, 0x80000000) - FDT_MAX_SIZE;
 250     /* RTAS goes just below that */
 251     rtas_addr = fdt_addr - RTAS_MAX_SIZE;
 252
 253     /* init CPUs */
 254     if (cpu_model == NULL) {
 255         cpu_model = "POWER7";
 256     }
 257     for (i = 0; i < smp_cpus; i++) {
 258         CPUState *env = cpu_init(cpu_model);
 259
 260         if (!env) {
 261             fprintf(stderr, "Unable to find PowerPC CPU definition\n");
 262             exit(1);
 263         }
 264         /* Set time-base frequency to 512 MHz */
 265         cpu_ppc_tb_init(env, TIMEBASE_FREQ);
 266         qemu_register_reset((QEMUResetHandler *)&cpu_reset, env);
 267
 268         env->hreset_vector = 0x60;
 269         env->hreset_excp_prefix = 0;
 270         env->gpr[3] = i;
 271
 272         envs[i] = env;
 273     }
 274
 275     /* allocate RAM */
 276     ram_offset = qemu_ram_alloc(NULL, "ppc_spapr.ram", ram_size);
 277     cpu_register_physical_memory(0, ram_size, ram_offset);
 278
 279     /* allocate hash page table.  For now we always make this 16mb,
 280      * later we should probably make it scale to the size of guest
 281      * RAM */
 282     htab_size = 1ULL << (pteg_shift + 7);
 283     htab = qemu_mallocz(htab_size);
 284
 285     for (i = 0; i < smp_cpus; i++) {
 286         envs[i]->external_htab = htab;
 287         envs[i]->htab_base = -1;
 288         envs[i]->htab_mask = htab_size - 1;
 289     }
 290
 291     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
 292     rtas_size = load_image_targphys(filename, rtas_addr, ram_size - rtas_addr);
 293     if (rtas_size < 0) {
 294         hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 295         exit(1);
 296     }
 297     qemu_free(filename);
 298
 299     spapr->vio_bus = spapr_vio_bus_init();
 300
 301     for (i = 0; i < MAX_SERIAL_PORTS; i++) {
 302         if (serial_hds[i]) {
 303             spapr_vty_create(spapr->vio_bus, i, serial_hds[i]);
 304         }
 305     }
 306
 307     if (kernel_filename) {
 308         uint64_t lowaddr = 0;
 309
 310         kernel_base = KERNEL_LOAD_ADDR;
 311
 312         kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
 313                                NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0);
 314         if (kernel_size < 0) {
 315             kernel_size = load_image_targphys(kernel_filename, kernel_base,
 316                                               ram_size - kernel_base);
 317         }
 318         if (kernel_size < 0) {
 319             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 320                     kernel_filename);
 321             exit(1);
 322         }
 323
 324         /* load initrd */
 325         if (initrd_filename) {
 326             initrd_base = INITRD_LOAD_ADDR;
 327             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 328                                               ram_size - initrd_base);
 329             if (initrd_size < 0) {
 330                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 331                         initrd_filename);
 332                 exit(1);
 333             }
 334         } else {
 335             initrd_base = 0;
 336             initrd_size = 0;
 337         }
 338     } else {
 339         fprintf(stderr, "pSeries machine needs -kernel for now");
 340         exit(1);
 341     }
 342
 343     /* Prepare the device tree */
 344     fdt = spapr_create_fdt(&fdt_size, ram_size, cpu_model, envs, spapr,
 345                            initrd_base, initrd_size, kernel_cmdline,
 346                            rtas_addr, rtas_size, pteg_shift + 7);
 347     assert(fdt != NULL);
 348
 349     cpu_physical_memory_write(fdt_addr, fdt, fdt_size);
 350
 351     qemu_free(fdt);
 352
 353     envs[0]->gpr[3] = fdt_addr;
 354     envs[0]->gpr[5] = 0;
 355     envs[0]->hreset_vector = kernel_base;
 356 }
 357
 358 static QEMUMachine spapr_machine = {
 359     .name = "pseries",
 360     .desc = "pSeries Logical Partition (PAPR compliant)",
 361     .init = ppc_spapr_init,
 362     .max_cpus = MAX_CPUS,
 363     .no_vga = 1,
 364     .no_parallel = 1,
 365 };
 366
 367 static void spapr_machine_init(void)
 368 {
 369     qemu_register_machine(&spapr_machine);
 370 }
 371
 372 machine_init(spapr_machine_init);