hw/ppc/sam460ex.c

   1 /*
   2  * QEMU aCube Sam460ex board emulation
   3  *
   4  * Copyright (c) 2012 François Revol
   5  * Copyright (c) 2016-2019 BALATON Zoltan
   6  *
   7  * This file is derived from hw/ppc440_bamboo.c,
   8  * the copyright for that material belongs to the original owners.
   9  *
  10  * This work is licensed under the GNU GPL license version 2 or later.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qemu/units.h"
  16 #include "qemu-common.h"
  17 #include "qemu/datadir.h"
  18 #include "qemu/error-report.h"
  19 #include "qapi/error.h"
  20 #include "hw/boards.h"
  21 #include "sysemu/kvm.h"
  22 #include "kvm_ppc.h"
  23 #include "sysemu/device_tree.h"
  24 #include "sysemu/block-backend.h"
  25 #include "hw/loader.h"
  26 #include "elf.h"
  27 #include "exec/address-spaces.h"
  28 #include "exec/memory.h"
  29 #include "ppc440.h"
  30 #include "ppc405.h"
  31 #include "hw/block/flash.h"
  32 #include "sysemu/sysemu.h"
  33 #include "sysemu/qtest.h"
  34 #include "sysemu/reset.h"
  35 #include "hw/sysbus.h"
  36 #include "hw/char/serial.h"
  37 #include "hw/i2c/ppc4xx_i2c.h"
  38 #include "hw/i2c/smbus_eeprom.h"
  39 #include "hw/usb/hcd-ehci.h"
  40 #include "hw/ppc/fdt.h"
  41 #include "hw/qdev-properties.h"
  42
  43 #include <libfdt.h>
  44
  45 #define BINARY_DEVICE_TREE_FILE "canyonlands.dtb"
  46 #define UBOOT_FILENAME "u-boot-sam460-20100605.bin"
  47 /* to extract the official U-Boot bin from the updater: */
  48 /* dd bs=1 skip=$(($(stat -c '%s' updater/updater-460) - 0x80000)) \
  49      if=updater/updater-460 of=u-boot-sam460-20100605.bin */
  50
  51 /* from Sam460 U-Boot include/configs/Sam460ex.h */
  52 #define FLASH_BASE             0xfff00000
  53 #define FLASH_BASE_H           0x4
  54 #define FLASH_SIZE             (1 * MiB)
  55 #define UBOOT_LOAD_BASE        0xfff80000
  56 #define UBOOT_SIZE             0x00080000
  57 #define UBOOT_ENTRY            0xfffffffc
  58
  59 /* from U-Boot */
  60 #define EPAPR_MAGIC           (0x45504150)
  61 #define KERNEL_ADDR           0x1000000
  62 #define FDT_ADDR              0x1800000
  63 #define RAMDISK_ADDR          0x1900000
  64
  65 /* Sam460ex IRQ MAP:
  66    IRQ0  = ETH_INT
  67    IRQ1  = FPGA_INT
  68    IRQ2  = PCI_INT (PCIA, PCIB, PCIC, PCIB)
  69    IRQ3  = FPGA_INT2
  70    IRQ11 = RTC_INT
  71    IRQ12 = SM502_INT
  72 */
  73
  74 #define CPU_FREQ 1150000000
  75 #define PLB_FREQ 230000000
  76 #define OPB_FREQ 115000000
  77 #define EBC_FREQ 115000000
  78 #define UART_FREQ 11059200
  79 #define SDRAM_NR_BANKS 4
  80
  81 /* The SoC could also handle 4 GiB but firmware does not work with that. */
  82 /* Maybe it overflows a signed 32 bit number somewhere? */
  83 static const ram_addr_t ppc460ex_sdram_bank_sizes[] = {
  84     2 * GiB, 1 * GiB, 512 * MiB, 256 * MiB, 128 * MiB, 64 * MiB,
  85     32 * MiB, 0
  86 };
  87
  88 struct boot_info {
  89     uint32_t dt_base;
  90     uint32_t dt_size;
  91     uint32_t entry;
  92 };
  93
  94 static int sam460ex_load_uboot(void)
  95 {
  96     /*
  97      * This first creates 1MiB of flash memory mapped at the end of
  98      * the 32-bit address space (0xFFF00000..0xFFFFFFFF).
  99      *
 100      * If_PFLASH unit 0 is defined, the flash memory is initialized
 101      * from that block backend.
 102      *
 103      * Else, it's initialized to zero.  And then 512KiB of ROM get
 104      * mapped on top of its second half (0xFFF80000..0xFFFFFFFF),
 105      * initialized from u-boot-sam460-20100605.bin.
 106      *
 107      * This doesn't smell right.
 108      *
 109      * The physical hardware appears to have 512KiB flash memory.
 110      *
 111      * TODO Figure out what we really need here, and clean this up.
 112      */
 113
 114     DriveInfo *dinfo;
 115
 116     dinfo = drive_get(IF_PFLASH, 0, 0);
 117     if (!pflash_cfi01_register(FLASH_BASE | ((hwaddr)FLASH_BASE_H << 32),
 118                                "sam460ex.flash", FLASH_SIZE,
 119                                dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 120                                64 * KiB, 1, 0x89, 0x18, 0x0000, 0x0, 1)) {
 121         error_report("Error registering flash memory");
 122         /* XXX: return an error instead? */
 123         exit(1);
 124     }
 125
 126     if (!dinfo) {
 127         /*error_report("No flash image given with the 'pflash' parameter,"
 128                 " using default u-boot image");*/
 129         rom_add_file_fixed(UBOOT_FILENAME,
 130                            UBOOT_LOAD_BASE | ((hwaddr)FLASH_BASE_H << 32),
 131                            -1);
 132     }
 133
 134     return 0;
 135 }
 136
 137 static int sam460ex_load_device_tree(hwaddr addr,
 138                                      uint32_t ramsize,
 139                                      hwaddr initrd_base,
 140                                      hwaddr initrd_size,
 141                                      const char *kernel_cmdline)
 142 {
 143     uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(ramsize) };
 144     char *filename;
 145     int fdt_size;
 146     void *fdt;
 147     uint32_t tb_freq = CPU_FREQ;
 148     uint32_t clock_freq = CPU_FREQ;
 149     int offset;
 150
 151     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 152     if (!filename) {
 153         error_report("Couldn't find dtb file `%s'", BINARY_DEVICE_TREE_FILE);
 154         exit(1);
 155     }
 156     fdt = load_device_tree(filename, &fdt_size);
 157     if (!fdt) {
 158         error_report("Couldn't load dtb file `%s'", filename);
 159         g_free(filename);
 160         exit(1);
 161     }
 162     g_free(filename);
 163
 164     /* Manipulate device tree in memory. */
 165
 166     qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property,
 167                      sizeof(mem_reg_property));
 168
 169     /* default FDT doesn't have a /chosen node... */
 170     qemu_fdt_add_subnode(fdt, "/chosen");
 171
 172     qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", initrd_base);
 173
 174     qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
 175                           (initrd_base + initrd_size));
 176
 177     qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 178
 179     /* Copy data from the host device tree into the guest. Since the guest can
 180      * directly access the timebase without host involvement, we must expose
 181      * the correct frequencies. */
 182     if (kvm_enabled()) {
 183         tb_freq = kvmppc_get_tbfreq();
 184         clock_freq = kvmppc_get_clockfreq();
 185     }
 186
 187     qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
 188                               clock_freq);
 189     qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
 190                               tb_freq);
 191
 192     /* Remove cpm node if it exists (it is not emulated) */
 193     offset = fdt_path_offset(fdt, "/cpm");
 194     if (offset >= 0) {
 195         _FDT(fdt_nop_node(fdt, offset));
 196     }
 197
 198     /* set serial port clocks */
 199     offset = fdt_node_offset_by_compatible(fdt, -1, "ns16550");
 200     while (offset >= 0) {
 201         _FDT(fdt_setprop_cell(fdt, offset, "clock-frequency", UART_FREQ));
 202         offset = fdt_node_offset_by_compatible(fdt, offset, "ns16550");
 203     }
 204
 205     /* some more clocks */
 206     qemu_fdt_setprop_cell(fdt, "/plb", "clock-frequency",
 207                               PLB_FREQ);
 208     qemu_fdt_setprop_cell(fdt, "/plb/opb", "clock-frequency",
 209                               OPB_FREQ);
 210     qemu_fdt_setprop_cell(fdt, "/plb/opb/ebc", "clock-frequency",
 211                               EBC_FREQ);
 212
 213     rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
 214     g_free(fdt);
 215
 216     return fdt_size;
 217 }
 218
 219 /* Create reset TLB entries for BookE, mapping only the flash memory.  */
 220 static void mmubooke_create_initial_mapping_uboot(CPUPPCState *env)
 221 {
 222     ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
 223
 224     /* on reset the flash is mapped by a shadow TLB,
 225      * but since we don't implement them we need to use
 226      * the same values U-Boot will use to avoid a fault.
 227      */
 228     tlb->attr = 0;
 229     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 230     tlb->size = 0x10000000; /* up to 0xffffffff  */
 231     tlb->EPN = 0xf0000000 & TARGET_PAGE_MASK;
 232     tlb->RPN = (0xf0000000 & TARGET_PAGE_MASK) | 0x4;
 233     tlb->PID = 0;
 234 }
 235
 236 /* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
 237 static void mmubooke_create_initial_mapping(CPUPPCState *env,
 238                                      target_ulong va,
 239                                      hwaddr pa)
 240 {
 241     ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
 242
 243     tlb->attr = 0;
 244     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 245     tlb->size = 1 << 31; /* up to 0x80000000  */
 246     tlb->EPN = va & TARGET_PAGE_MASK;
 247     tlb->RPN = pa & TARGET_PAGE_MASK;
 248     tlb->PID = 0;
 249 }
 250
 251 static void main_cpu_reset(void *opaque)
 252 {
 253     PowerPCCPU *cpu = opaque;
 254     CPUPPCState *env = &cpu->env;
 255     struct boot_info *bi = env->load_info;
 256
 257     cpu_reset(CPU(cpu));
 258
 259     /* either we have a kernel to boot or we jump to U-Boot */
 260     if (bi->entry != UBOOT_ENTRY) {
 261         env->gpr[1] = (16 * MiB) - 8;
 262         env->gpr[3] = FDT_ADDR;
 263         env->nip = bi->entry;
 264
 265         /* Create a mapping for the kernel.  */
 266         mmubooke_create_initial_mapping(env, 0, 0);
 267         env->gpr[6] = tswap32(EPAPR_MAGIC);
 268         env->gpr[7] = (16 * MiB) - 8; /* bi->ima_size; */
 269
 270     } else {
 271         env->nip = UBOOT_ENTRY;
 272         mmubooke_create_initial_mapping_uboot(env);
 273     }
 274 }
 275
 276 static void sam460ex_init(MachineState *machine)
 277 {
 278     MemoryRegion *address_space_mem = get_system_memory();
 279     MemoryRegion *isa = g_new(MemoryRegion, 1);
 280     MemoryRegion *ram_memories = g_new(MemoryRegion, SDRAM_NR_BANKS);
 281     hwaddr ram_bases[SDRAM_NR_BANKS] = {0};
 282     hwaddr ram_sizes[SDRAM_NR_BANKS] = {0};
 283     MemoryRegion *l2cache_ram = g_new(MemoryRegion, 1);
 284     qemu_irq *irqs, *uic[4];
 285     PCIBus *pci_bus;
 286     PowerPCCPU *cpu;
 287     CPUPPCState *env;
 288     I2CBus *i2c;
 289     hwaddr entry = UBOOT_ENTRY;
 290     target_long initrd_size = 0;
 291     DeviceState *dev;
 292     SysBusDevice *sbdev;
 293     struct boot_info *boot_info;
 294     uint8_t *spd_data;
 295     int success;
 296
 297     cpu = POWERPC_CPU(cpu_create(machine->cpu_type));
 298     env = &cpu->env;
 299     if (env->mmu_model != POWERPC_MMU_BOOKE) {
 300         error_report("Only MMU model BookE is supported by this machine.");
 301         exit(1);
 302     }
 303
 304     qemu_register_reset(main_cpu_reset, cpu);
 305     boot_info = g_malloc0(sizeof(*boot_info));
 306     env->load_info = boot_info;
 307
 308     ppc_booke_timers_init(cpu, CPU_FREQ, 0);
 309     ppc_dcr_init(env, NULL, NULL);
 310
 311     /* PLB arbitrer */
 312     ppc4xx_plb_init(env);
 313
 314     /* interrupt controllers */
 315     irqs = g_new0(qemu_irq, PPCUIC_OUTPUT_NB);
 316     irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 317     irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 318     uic[0] = ppcuic_init(env, irqs, 0xc0, 0, 1);
 319     uic[1] = ppcuic_init(env, &uic[0][30], 0xd0, 0, 1);
 320     uic[2] = ppcuic_init(env, &uic[0][10], 0xe0, 0, 1);
 321     uic[3] = ppcuic_init(env, &uic[0][16], 0xf0, 0, 1);
 322
 323     /* SDRAM controller */
 324     /* put all RAM on first bank because board has one slot
 325      * and firmware only checks that */
 326     ppc4xx_sdram_banks(machine->ram, 1, ram_memories, ram_bases, ram_sizes,
 327                        ppc460ex_sdram_bank_sizes);
 328
 329     /* FIXME: does 460EX have ECC interrupts? */
 330     ppc440_sdram_init(env, SDRAM_NR_BANKS, ram_memories,
 331                       ram_bases, ram_sizes, 1);
 332
 333     /* IIC controllers and devices */
 334     dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600700, uic[0][2]);
 335     i2c = PPC4xx_I2C(dev)->bus;
 336     /* SPD EEPROM on RAM module */
 337     spd_data = spd_data_generate(ram_sizes[0] < 128 * MiB ? DDR : DDR2,
 338                                  ram_sizes[0]);
 339     spd_data[20] = 4; /* SO-DIMM module */
 340     smbus_eeprom_init_one(i2c, 0x50, spd_data);
 341     /* RTC */
 342     i2c_slave_create_simple(i2c, "m41t80", 0x68);
 343
 344     dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600800, uic[0][3]);
 345
 346     /* External bus controller */
 347     ppc405_ebc_init(env);
 348
 349     /* CPR */
 350     ppc4xx_cpr_init(env);
 351
 352     /* PLB to AHB bridge */
 353     ppc4xx_ahb_init(env);
 354
 355     /* System DCRs */
 356     ppc4xx_sdr_init(env);
 357
 358     /* MAL */
 359     ppc4xx_mal_init(env, 4, 16, &uic[2][3]);
 360
 361     /* DMA */
 362     ppc4xx_dma_init(env, 0x200);
 363
 364     /* 256K of L2 cache as memory */
 365     ppc4xx_l2sram_init(env);
 366     /* FIXME: remove this after fixing l2sram mapping in ppc440_uc.c? */
 367     memory_region_init_ram(l2cache_ram, NULL, "ppc440.l2cache_ram", 256 * KiB,
 368                            &error_abort);
 369     memory_region_add_subregion(address_space_mem, 0x400000000LL, l2cache_ram);
 370
 371     /* USB */
 372     sysbus_create_simple(TYPE_PPC4xx_EHCI, 0x4bffd0400, uic[2][29]);
 373     dev = qdev_new("sysbus-ohci");
 374     qdev_prop_set_string(dev, "masterbus", "usb-bus.0");
 375     qdev_prop_set_uint32(dev, "num-ports", 6);
 376     sbdev = SYS_BUS_DEVICE(dev);
 377     sysbus_realize_and_unref(sbdev, &error_fatal);
 378     sysbus_mmio_map(sbdev, 0, 0x4bffd0000);
 379     sysbus_connect_irq(sbdev, 0, uic[2][30]);
 380     usb_create_simple(usb_bus_find(-1), "usb-kbd");
 381     usb_create_simple(usb_bus_find(-1), "usb-mouse");
 382
 383     /* PCI bus */
 384     ppc460ex_pcie_init(env);
 385     /* All PCI irqs are connected to the same UIC pin (cf. UBoot source) */
 386     dev = sysbus_create_simple("ppc440-pcix-host", 0xc0ec00000, uic[1][0]);
 387     pci_bus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
 388     if (!pci_bus) {
 389         error_report("couldn't create PCI controller!");
 390         exit(1);
 391     }
 392     memory_region_init_alias(isa, NULL, "isa_mmio", get_system_io(),
 393                              0, 0x10000);
 394     memory_region_add_subregion(get_system_memory(), 0xc08000000, isa);
 395
 396     /* PCI devices */
 397     pci_create_simple(pci_bus, PCI_DEVFN(6, 0), "sm501");
 398     /* SoC has a single SATA port but we don't emulate that yet
 399      * However, firmware and usual clients have driver for SiI311x
 400      * so add one for convenience by default */
 401     if (defaults_enabled()) {
 402         pci_create_simple(pci_bus, -1, "sii3112");
 403     }
 404
 405     /* SoC has 4 UARTs
 406      * but board has only one wired and two are present in fdt */
 407     if (serial_hd(0) != NULL) {
 408         serial_mm_init(address_space_mem, 0x4ef600300, 0, uic[1][1],
 409                        PPC_SERIAL_MM_BAUDBASE, serial_hd(0),
 410                        DEVICE_BIG_ENDIAN);
 411     }
 412     if (serial_hd(1) != NULL) {
 413         serial_mm_init(address_space_mem, 0x4ef600400, 0, uic[0][1],
 414                        PPC_SERIAL_MM_BAUDBASE, serial_hd(1),
 415                        DEVICE_BIG_ENDIAN);
 416     }
 417
 418     /* Load U-Boot image. */
 419     if (!machine->kernel_filename) {
 420         success = sam460ex_load_uboot();
 421         if (success < 0) {
 422             error_report("could not load firmware");
 423             exit(1);
 424         }
 425     }
 426
 427     /* Load kernel. */
 428     if (machine->kernel_filename) {
 429         hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
 430         success = load_uimage(machine->kernel_filename, &entry, &loadaddr,
 431                               NULL, NULL, NULL);
 432         if (success < 0) {
 433             uint64_t elf_entry;
 434
 435             success = load_elf(machine->kernel_filename, NULL, NULL, NULL,
 436                                &elf_entry, NULL, NULL, NULL,
 437                                1, PPC_ELF_MACHINE, 0, 0);
 438             entry = elf_entry;
 439         }
 440         /* XXX try again as binary */
 441         if (success < 0) {
 442             error_report("could not load kernel '%s'",
 443                     machine->kernel_filename);
 444             exit(1);
 445         }
 446     }
 447
 448     /* Load initrd. */
 449     if (machine->initrd_filename) {
 450         initrd_size = load_image_targphys(machine->initrd_filename,
 451                                           RAMDISK_ADDR,
 452                                           machine->ram_size - RAMDISK_ADDR);
 453         if (initrd_size < 0) {
 454             error_report("could not load ram disk '%s' at %x",
 455                     machine->initrd_filename, RAMDISK_ADDR);
 456             exit(1);
 457         }
 458     }
 459
 460     /* If we're loading a kernel directly, we must load the device tree too. */
 461     if (machine->kernel_filename) {
 462         int dt_size;
 463
 464         dt_size = sam460ex_load_device_tree(FDT_ADDR, machine->ram_size,
 465                                     RAMDISK_ADDR, initrd_size,
 466                                     machine->kernel_cmdline);
 467
 468         boot_info->dt_base = FDT_ADDR;
 469         boot_info->dt_size = dt_size;
 470     }
 471
 472     boot_info->entry = entry;
 473 }
 474
 475 static void sam460ex_machine_init(MachineClass *mc)
 476 {
 477     mc->desc = "aCube Sam460ex";
 478     mc->init = sam460ex_init;
 479     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("460exb");
 480     mc->default_ram_size = 512 * MiB;
 481     mc->default_ram_id = "ppc4xx.sdram";
 482 }
 483
 484 DEFINE_MACHINE("sam460ex", sam460ex_machine_init)