hw/sh4/r2d.c

   1 /*
   2  * Renesas SH7751R R2D-PLUS emulation
   3  *
   4  * Copyright (c) 2007 Magnus Damm
   5  * Copyright (c) 2008 Paul Mundt
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #include "qemu/osdep.h"
  27 #include "qemu/units.h"
  28 #include "qapi/error.h"
  29 #include "qemu/error-report.h"
  30 #include "cpu.h"
  31 #include "hw/sysbus.h"
  32 #include "hw/sh4/sh.h"
  33 #include "sysemu/reset.h"
  34 #include "sysemu/runstate.h"
  35 #include "sysemu/sysemu.h"
  36 #include "hw/boards.h"
  37 #include "hw/pci/pci.h"
  38 #include "hw/qdev-properties.h"
  39 #include "net/net.h"
  40 #include "sh7750_regs.h"
  41 #include "hw/ide.h"
  42 #include "hw/irq.h"
  43 #include "hw/loader.h"
  44 #include "hw/usb.h"
  45 #include "hw/block/flash.h"
  46
  47 #define FLASH_BASE 0x00000000
  48 #define FLASH_SIZE (16 * MiB)
  49
  50 #define SDRAM_BASE 0x0c000000 /* Physical location of SDRAM: Area 3 */
  51 #define SDRAM_SIZE 0x04000000
  52
  53 #define SM501_VRAM_SIZE 0x800000
  54
  55 #define BOOT_PARAMS_OFFSET 0x0010000
  56 /* CONFIG_BOOT_LINK_OFFSET of Linux kernel */
  57 #define LINUX_LOAD_OFFSET  0x0800000
  58 #define INITRD_LOAD_OFFSET 0x1800000
  59
  60 #define PA_IRLMSK 0x00
  61 #define PA_POWOFF 0x30
  62 #define PA_VERREG 0x32
  63 #define PA_OUTPORT 0x36
  64
  65 typedef struct {
  66     uint16_t bcr;
  67     uint16_t irlmsk;
  68     uint16_t irlmon;
  69     uint16_t cfctl;
  70     uint16_t cfpow;
  71     uint16_t dispctl;
  72     uint16_t sdmpow;
  73     uint16_t rtcce;
  74     uint16_t pcicd;
  75     uint16_t voyagerrts;
  76     uint16_t cfrst;
  77     uint16_t admrts;
  78     uint16_t extrst;
  79     uint16_t cfcdintclr;
  80     uint16_t keyctlclr;
  81     uint16_t pad0;
  82     uint16_t pad1;
  83     uint16_t verreg;
  84     uint16_t inport;
  85     uint16_t outport;
  86     uint16_t bverreg;
  87
  88 /* output pin */
  89     qemu_irq irl;
  90     MemoryRegion iomem;
  91 } r2d_fpga_t;
  92
  93 enum r2d_fpga_irq {
  94     PCI_INTD, CF_IDE, CF_CD, PCI_INTC, SM501, KEY, RTC_A, RTC_T,
  95     SDCARD, PCI_INTA, PCI_INTB, EXT, TP,
  96     NR_IRQS
  97 };
  98
  99 static const struct { short irl; uint16_t msk; } irqtab[NR_IRQS] = {
 100     [CF_IDE] =   {  1, 1 << 9 },
 101     [CF_CD] =    {  2, 1 << 8 },
 102     [PCI_INTA] = {  9, 1 << 14 },
 103     [PCI_INTB] = { 10, 1 << 13 },
 104     [PCI_INTC] = {  3, 1 << 12 },
 105     [PCI_INTD] = {  0, 1 << 11 },
 106     [SM501] =    {  4, 1 << 10 },
 107     [KEY] =      {  5, 1 << 6 },
 108     [RTC_A] =    {  6, 1 << 5 },
 109     [RTC_T] =    {  7, 1 << 4 },
 110     [SDCARD] =   {  8, 1 << 7 },
 111     [EXT] =      { 11, 1 << 0 },
 112     [TP] =       { 12, 1 << 15 },
 113 };
 114
 115 static void update_irl(r2d_fpga_t *fpga)
 116 {
 117     int i, irl = 15;
 118     for (i = 0; i < NR_IRQS; i++) {
 119         if ((fpga->irlmon & fpga->irlmsk & irqtab[i].msk) &&
 120             irqtab[i].irl < irl) {
 121             irl = irqtab[i].irl;
 122         }
 123     }
 124     qemu_set_irq(fpga->irl, irl ^ 15);
 125 }
 126
 127 static void r2d_fpga_irq_set(void *opaque, int n, int level)
 128 {
 129     r2d_fpga_t *fpga = opaque;
 130     if (level) {
 131         fpga->irlmon |= irqtab[n].msk;
 132     } else {
 133         fpga->irlmon &= ~irqtab[n].msk;
 134     }
 135     update_irl(fpga);
 136 }
 137
 138 static uint64_t r2d_fpga_read(void *opaque, hwaddr addr, unsigned int size)
 139 {
 140     r2d_fpga_t *s = opaque;
 141
 142     switch (addr) {
 143     case PA_IRLMSK:
 144         return s->irlmsk;
 145     case PA_OUTPORT:
 146         return s->outport;
 147     case PA_POWOFF:
 148         return 0x00;
 149     case PA_VERREG:
 150         return 0x10;
 151     }
 152
 153     return 0;
 154 }
 155
 156 static void
 157 r2d_fpga_write(void *opaque, hwaddr addr, uint64_t value, unsigned int size)
 158 {
 159     r2d_fpga_t *s = opaque;
 160
 161     switch (addr) {
 162     case PA_IRLMSK:
 163         s->irlmsk = value;
 164         update_irl(s);
 165         break;
 166     case PA_OUTPORT:
 167         s->outport = value;
 168         break;
 169     case PA_POWOFF:
 170         if (value & 1) {
 171             qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
 172         }
 173         break;
 174     case PA_VERREG:
 175         /* Discard writes */
 176         break;
 177     }
 178 }
 179
 180 static const MemoryRegionOps r2d_fpga_ops = {
 181     .read = r2d_fpga_read,
 182     .write = r2d_fpga_write,
 183     .impl.min_access_size = 2,
 184     .impl.max_access_size = 2,
 185     .endianness = DEVICE_NATIVE_ENDIAN,
 186 };
 187
 188 static qemu_irq *r2d_fpga_init(MemoryRegion *sysmem,
 189                                hwaddr base, qemu_irq irl)
 190 {
 191     r2d_fpga_t *s;
 192
 193     s = g_new0(r2d_fpga_t, 1);
 194
 195     s->irl = irl;
 196
 197     memory_region_init_io(&s->iomem, NULL, &r2d_fpga_ops, s, "r2d-fpga", 0x40);
 198     memory_region_add_subregion(sysmem, base, &s->iomem);
 199     return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
 200 }
 201
 202 typedef struct ResetData {
 203     SuperHCPU *cpu;
 204     uint32_t vector;
 205 } ResetData;
 206
 207 static void main_cpu_reset(void *opaque)
 208 {
 209     ResetData *s = (ResetData *)opaque;
 210     CPUSH4State *env = &s->cpu->env;
 211
 212     cpu_reset(CPU(s->cpu));
 213     env->pc = s->vector;
 214 }
 215
 216 static struct QEMU_PACKED
 217 {
 218     int mount_root_rdonly;
 219     int ramdisk_flags;
 220     int orig_root_dev;
 221     int loader_type;
 222     int initrd_start;
 223     int initrd_size;
 224
 225     char pad[232];
 226
 227     char kernel_cmdline[256] QEMU_NONSTRING;
 228 } boot_params;
 229
 230 static void r2d_init(MachineState *machine)
 231 {
 232     const char *kernel_filename = machine->kernel_filename;
 233     const char *kernel_cmdline = machine->kernel_cmdline;
 234     const char *initrd_filename = machine->initrd_filename;
 235     SuperHCPU *cpu;
 236     CPUSH4State *env;
 237     ResetData *reset_info;
 238     struct SH7750State *s;
 239     MemoryRegion *sdram = g_new(MemoryRegion, 1);
 240     qemu_irq *irq;
 241     DriveInfo *dinfo;
 242     int i;
 243     DeviceState *dev;
 244     SysBusDevice *busdev;
 245     MemoryRegion *address_space_mem = get_system_memory();
 246     PCIBus *pci_bus;
 247
 248     cpu = SUPERH_CPU(cpu_create(machine->cpu_type));
 249     env = &cpu->env;
 250
 251     reset_info = g_new0(ResetData, 1);
 252     reset_info->cpu = cpu;
 253     reset_info->vector = env->pc;
 254     qemu_register_reset(main_cpu_reset, reset_info);
 255
 256     /* Allocate memory space */
 257     memory_region_init_ram(sdram, NULL, "r2d.sdram", SDRAM_SIZE, &error_fatal);
 258     memory_region_add_subregion(address_space_mem, SDRAM_BASE, sdram);
 259     /* Register peripherals */
 260     s = sh7750_init(cpu, address_space_mem);
 261     irq = r2d_fpga_init(address_space_mem, 0x04000000, sh7750_irl(s));
 262
 263     dev = qdev_new("sh_pci");
 264     busdev = SYS_BUS_DEVICE(dev);
 265     sysbus_realize_and_unref(busdev, &error_fatal);
 266     pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci"));
 267     sysbus_mmio_map(busdev, 0, P4ADDR(0x1e200000));
 268     sysbus_mmio_map(busdev, 1, A7ADDR(0x1e200000));
 269     sysbus_connect_irq(busdev, 0, irq[PCI_INTA]);
 270     sysbus_connect_irq(busdev, 1, irq[PCI_INTB]);
 271     sysbus_connect_irq(busdev, 2, irq[PCI_INTC]);
 272     sysbus_connect_irq(busdev, 3, irq[PCI_INTD]);
 273
 274     dev = qdev_new("sysbus-sm501");
 275     busdev = SYS_BUS_DEVICE(dev);
 276     qdev_prop_set_uint32(dev, "vram-size", SM501_VRAM_SIZE);
 277     qdev_prop_set_uint32(dev, "base", 0x10000000);
 278     qdev_prop_set_chr(dev, "chardev", serial_hd(2));
 279     sysbus_realize_and_unref(busdev, &error_fatal);
 280     sysbus_mmio_map(busdev, 0, 0x10000000);
 281     sysbus_mmio_map(busdev, 1, 0x13e00000);
 282     sysbus_connect_irq(busdev, 0, irq[SM501]);
 283
 284     /* onboard CF (True IDE mode, Master only). */
 285     dinfo = drive_get(IF_IDE, 0, 0);
 286     dev = qdev_new("mmio-ide");
 287     busdev = SYS_BUS_DEVICE(dev);
 288     sysbus_connect_irq(busdev, 0, irq[CF_IDE]);
 289     qdev_prop_set_uint32(dev, "shift", 1);
 290     sysbus_realize_and_unref(busdev, &error_fatal);
 291     sysbus_mmio_map(busdev, 0, 0x14001000);
 292     sysbus_mmio_map(busdev, 1, 0x1400080c);
 293     mmio_ide_init_drives(dev, dinfo, NULL);
 294
 295     /*
 296      * Onboard flash memory
 297      * According to the old board user document in Japanese (under
 298      * NDA) what is referred to as FROM (Area0) is connected via a
 299      * 32-bit bus and CS0 to CN8. The docs mention a Cypress
 300      * S29PL127J60TFI130 chipsset.  Per the 'S29PL-J 002-00615
 301      * Rev. *E' datasheet, it is a 128Mbit NOR parallel flash
 302      * addressable in words of 16bit.
 303      */
 304     dinfo = drive_get(IF_PFLASH, 0, 0);
 305     pflash_cfi02_register(0x0, "r2d.flash", FLASH_SIZE,
 306                           dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 307                           64 * KiB, 1, 2, 0x0001, 0x227e, 0x2220, 0x2200,
 308                           0x555, 0x2aa, 0);
 309
 310     /* NIC: rtl8139 on-board, and 2 slots. */
 311     for (i = 0; i < nb_nics; i++)
 312         pci_nic_init_nofail(&nd_table[i], pci_bus,
 313                             "rtl8139", i == 0 ? "2" : NULL);
 314
 315     /* USB keyboard */
 316     usb_create_simple(usb_bus_find(-1), "usb-kbd");
 317
 318     /* Todo: register on board registers */
 319     memset(&boot_params, 0, sizeof(boot_params));
 320
 321     if (kernel_filename) {
 322         int kernel_size;
 323
 324         kernel_size = load_image_targphys(kernel_filename,
 325                                           SDRAM_BASE + LINUX_LOAD_OFFSET,
 326                                           INITRD_LOAD_OFFSET - LINUX_LOAD_OFFSET);
 327         if (kernel_size < 0) {
 328             error_report("qemu: could not load kernel '%s'", kernel_filename);
 329             exit(1);
 330         }
 331
 332         /* initialization which should be done by firmware */
 333         address_space_stl(&address_space_memory, SH7750_BCR1, 1 << 3,
 334                           MEMTXATTRS_UNSPECIFIED, NULL); /* cs3 SDRAM */
 335         address_space_stw(&address_space_memory, SH7750_BCR2, 3 << (3 * 2),
 336                           MEMTXATTRS_UNSPECIFIED, NULL); /* cs3 32bit */
 337         /* Start from P2 area */
 338         reset_info->vector = (SDRAM_BASE + LINUX_LOAD_OFFSET) | 0xa0000000;
 339     }
 340
 341     if (initrd_filename) {
 342         int initrd_size;
 343
 344         initrd_size = load_image_targphys(initrd_filename,
 345                                           SDRAM_BASE + INITRD_LOAD_OFFSET,
 346                                           SDRAM_SIZE - INITRD_LOAD_OFFSET);
 347
 348         if (initrd_size < 0) {
 349             error_report("qemu: could not load initrd '%s'", initrd_filename);
 350             exit(1);
 351         }
 352
 353         /* initialization which should be done by firmware */
 354         boot_params.loader_type = tswap32(1);
 355         boot_params.initrd_start = tswap32(INITRD_LOAD_OFFSET);
 356         boot_params.initrd_size = tswap32(initrd_size);
 357     }
 358
 359     if (kernel_cmdline) {
 360         /*
 361          * I see no evidence that this .kernel_cmdline buffer requires
 362          * NUL-termination, so using strncpy should be ok.
 363          */
 364         strncpy(boot_params.kernel_cmdline, kernel_cmdline,
 365                 sizeof(boot_params.kernel_cmdline));
 366     }
 367
 368     rom_add_blob_fixed("boot_params", &boot_params, sizeof(boot_params),
 369                        SDRAM_BASE + BOOT_PARAMS_OFFSET);
 370 }
 371
 372 static void r2d_machine_init(MachineClass *mc)
 373 {
 374     mc->desc = "r2d-plus board";
 375     mc->init = r2d_init;
 376     mc->block_default_type = IF_IDE;
 377     mc->default_cpu_type = TYPE_SH7751R_CPU;
 378 }
 379
 380 DEFINE_MACHINE("r2d", r2d_machine_init)