hw/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 "sysbus.h"
  27 #include "hw.h"
  28 #include "sh.h"
  29 #include "devices.h"
  30 #include "sysemu.h"
  31 #include "boards.h"
  32 #include "pci.h"
  33 #include "net.h"
  34 #include "sh7750_regs.h"
  35 #include "ide.h"
  36 #include "loader.h"
  37 #include "usb.h"
  38 #include "flash.h"
  39 #include "blockdev.h"
  40 #include "exec-memory.h"
  41
  42 #define FLASH_BASE 0x00000000
  43 #define FLASH_SIZE 0x02000000
  44
  45 #define SDRAM_BASE 0x0c000000 /* Physical location of SDRAM: Area 3 */
  46 #define SDRAM_SIZE 0x04000000
  47
  48 #define SM501_VRAM_SIZE 0x800000
  49
  50 #define BOOT_PARAMS_OFFSET 0x0010000
  51 /* CONFIG_BOOT_LINK_OFFSET of Linux kernel */
  52 #define LINUX_LOAD_OFFSET  0x0800000
  53 #define INITRD_LOAD_OFFSET 0x1800000
  54
  55 #define PA_IRLMSK       0x00
  56 #define PA_POWOFF       0x30
  57 #define PA_VERREG       0x32
  58 #define PA_OUTPORT      0x36
  59
  60 typedef struct {
  61     uint16_t bcr;
  62     uint16_t irlmsk;
  63     uint16_t irlmon;
  64     uint16_t cfctl;
  65     uint16_t cfpow;
  66     uint16_t dispctl;
  67     uint16_t sdmpow;
  68     uint16_t rtcce;
  69     uint16_t pcicd;
  70     uint16_t voyagerrts;
  71     uint16_t cfrst;
  72     uint16_t admrts;
  73     uint16_t extrst;
  74     uint16_t cfcdintclr;
  75     uint16_t keyctlclr;
  76     uint16_t pad0;
  77     uint16_t pad1;
  78     uint16_t verreg;
  79     uint16_t inport;
  80     uint16_t outport;
  81     uint16_t bverreg;
  82
  83 /* output pin */
  84     qemu_irq irl;
  85     MemoryRegion iomem;
  86 } r2d_fpga_t;
  87
  88 enum r2d_fpga_irq {
  89     PCI_INTD, CF_IDE, CF_CD, PCI_INTC, SM501, KEY, RTC_A, RTC_T,
  90     SDCARD, PCI_INTA, PCI_INTB, EXT, TP,
  91     NR_IRQS
  92 };
  93
  94 static const struct { short irl; uint16_t msk; } irqtab[NR_IRQS] = {
  95     [CF_IDE]    = {  1, 1<<9 },
  96     [CF_CD]     = {  2, 1<<8 },
  97     [PCI_INTA]  = {  9, 1<<14 },
  98     [PCI_INTB]  = { 10, 1<<13 },
  99     [PCI_INTC]  = {  3, 1<<12 },
 100     [PCI_INTD]  = {  0, 1<<11 },
 101     [SM501]     = {  4, 1<<10 },
 102     [KEY]       = {  5, 1<<6 },
 103     [RTC_A]     = {  6, 1<<5 },
 104     [RTC_T]     = {  7, 1<<4 },
 105     [SDCARD]    = {  8, 1<<7 },
 106     [EXT]       = { 11, 1<<0 },
 107     [TP]        = { 12, 1<<15 },
 108 };
 109
 110 static void update_irl(r2d_fpga_t *fpga)
 111 {
 112     int i, irl = 15;
 113     for (i = 0; i < NR_IRQS; i++)
 114         if (fpga->irlmon & fpga->irlmsk & irqtab[i].msk)
 115             if (irqtab[i].irl < irl)
 116                 irl = irqtab[i].irl;
 117     qemu_set_irq(fpga->irl, irl ^ 15);
 118 }
 119
 120 static void r2d_fpga_irq_set(void *opaque, int n, int level)
 121 {
 122     r2d_fpga_t *fpga = opaque;
 123     if (level)
 124         fpga->irlmon |= irqtab[n].msk;
 125     else
 126         fpga->irlmon &= ~irqtab[n].msk;
 127     update_irl(fpga);
 128 }
 129
 130 static uint32_t r2d_fpga_read(void *opaque, target_phys_addr_t addr)
 131 {
 132     r2d_fpga_t *s = opaque;
 133
 134     switch (addr) {
 135     case PA_IRLMSK:
 136         return s->irlmsk;
 137     case PA_OUTPORT:
 138         return s->outport;
 139     case PA_POWOFF:
 140         return 0x00;
 141     case PA_VERREG:
 142         return 0x10;
 143     }
 144
 145     return 0;
 146 }
 147
 148 static void
 149 r2d_fpga_write(void *opaque, target_phys_addr_t addr, uint32_t value)
 150 {
 151     r2d_fpga_t *s = opaque;
 152
 153     switch (addr) {
 154     case PA_IRLMSK:
 155         s->irlmsk = value;
 156         update_irl(s);
 157         break;
 158     case PA_OUTPORT:
 159         s->outport = value;
 160         break;
 161     case PA_POWOFF:
 162         if (value & 1) {
 163             qemu_system_shutdown_request();
 164         }
 165         break;
 166     case PA_VERREG:
 167         /* Discard writes */
 168         break;
 169     }
 170 }
 171
 172 static const MemoryRegionOps r2d_fpga_ops = {
 173     .old_mmio = {
 174         .read = { r2d_fpga_read, r2d_fpga_read, NULL, },
 175         .write = { r2d_fpga_write, r2d_fpga_write, NULL, },
 176     },
 177     .endianness = DEVICE_NATIVE_ENDIAN,
 178 };
 179
 180 static qemu_irq *r2d_fpga_init(MemoryRegion *sysmem,
 181                                target_phys_addr_t base, qemu_irq irl)
 182 {
 183     r2d_fpga_t *s;
 184
 185     s = g_malloc0(sizeof(r2d_fpga_t));
 186
 187     s->irl = irl;
 188
 189     memory_region_init_io(&s->iomem, &r2d_fpga_ops, s, "r2d-fpga", 0x40);
 190     memory_region_add_subregion(sysmem, base, &s->iomem);
 191     return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
 192 }
 193
 194 typedef struct ResetData {
 195     SuperHCPU *cpu;
 196     uint32_t vector;
 197 } ResetData;
 198
 199 static void main_cpu_reset(void *opaque)
 200 {
 201     ResetData *s = (ResetData *)opaque;
 202     CPUSH4State *env = &s->cpu->env;
 203
 204     cpu_reset(CPU(s->cpu));
 205     env->pc = s->vector;
 206 }
 207
 208 static struct QEMU_PACKED
 209 {
 210     int mount_root_rdonly;
 211     int ramdisk_flags;
 212     int orig_root_dev;
 213     int loader_type;
 214     int initrd_start;
 215     int initrd_size;
 216
 217     char pad[232];
 218
 219     char kernel_cmdline[256];
 220 } boot_params;
 221
 222 static void r2d_init(QEMUMachineInitArgs *args)
 223 {
 224     const char *cpu_model = args->cpu_model;
 225     const char *kernel_filename = args->kernel_filename;
 226     const char *kernel_cmdline = args->kernel_cmdline;
 227     const char *initrd_filename = args->initrd_filename;
 228     SuperHCPU *cpu;
 229     CPUSH4State *env;
 230     ResetData *reset_info;
 231     struct SH7750State *s;
 232     MemoryRegion *sdram = g_new(MemoryRegion, 1);
 233     qemu_irq *irq;
 234     DriveInfo *dinfo;
 235     int i;
 236     DeviceState *dev;
 237     SysBusDevice *busdev;
 238     MemoryRegion *address_space_mem = get_system_memory();
 239
 240     if (cpu_model == NULL) {
 241         cpu_model = "SH7751R";
 242     }
 243
 244     cpu = cpu_sh4_init(cpu_model);
 245     if (cpu == NULL) {
 246         fprintf(stderr, "Unable to find CPU definition\n");
 247         exit(1);
 248     }
 249     env = &cpu->env;
 250
 251     reset_info = g_malloc0(sizeof(ResetData));
 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, "r2d.sdram", SDRAM_SIZE);
 258     vmstate_register_ram_global(sdram);
 259     memory_region_add_subregion(address_space_mem, SDRAM_BASE, sdram);
 260     /* Register peripherals */
 261     s = sh7750_init(env, address_space_mem);
 262     irq = r2d_fpga_init(address_space_mem, 0x04000000, sh7750_irl(s));
 263
 264     dev = qdev_create(NULL, "sh_pci");
 265     busdev = sysbus_from_qdev(dev);
 266     qdev_init_nofail(dev);
 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     sm501_init(address_space_mem, 0x10000000, SM501_VRAM_SIZE,
 275                irq[SM501], serial_hds[2]);
 276
 277     /* onboard CF (True IDE mode, Master only). */
 278     dinfo = drive_get(IF_IDE, 0, 0);
 279     mmio_ide_init(0x14001000, 0x1400080c, address_space_mem, irq[CF_IDE], 1,
 280                   dinfo, NULL);
 281
 282     /* onboard flash memory */
 283     dinfo = drive_get(IF_PFLASH, 0, 0);
 284     pflash_cfi02_register(0x0, NULL, "r2d.flash", FLASH_SIZE,
 285                           dinfo ? dinfo->bdrv : NULL, (16 * 1024),
 286                           FLASH_SIZE >> 16,
 287                           1, 4, 0x0000, 0x0000, 0x0000, 0x0000,
 288                           0x555, 0x2aa, 0);
 289
 290     /* NIC: rtl8139 on-board, and 2 slots. */
 291     for (i = 0; i < nb_nics; i++)
 292         pci_nic_init_nofail(&nd_table[i], "rtl8139", i==0 ? "2" : NULL);
 293
 294     /* USB keyboard */
 295     usbdevice_create("keyboard");
 296
 297     /* Todo: register on board registers */
 298     memset(&boot_params, 0, sizeof(boot_params));
 299
 300     if (kernel_filename) {
 301         int kernel_size;
 302
 303         kernel_size = load_image_targphys(kernel_filename,
 304                                           SDRAM_BASE + LINUX_LOAD_OFFSET,
 305                                           INITRD_LOAD_OFFSET - LINUX_LOAD_OFFSET);
 306         if (kernel_size < 0) {
 307           fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
 308           exit(1);
 309         }
 310
 311         /* initialization which should be done by firmware */
 312         stl_phys(SH7750_BCR1, 1<<3); /* cs3 SDRAM */
 313         stw_phys(SH7750_BCR2, 3<<(3*2)); /* cs3 32bit */
 314         reset_info->vector = (SDRAM_BASE + LINUX_LOAD_OFFSET) | 0xa0000000; /* Start from P2 area */
 315     }
 316
 317     if (initrd_filename) {
 318         int initrd_size;
 319
 320         initrd_size = load_image_targphys(initrd_filename,
 321                                           SDRAM_BASE + INITRD_LOAD_OFFSET,
 322                                           SDRAM_SIZE - INITRD_LOAD_OFFSET);
 323
 324         if (initrd_size < 0) {
 325           fprintf(stderr, "qemu: could not load initrd '%s'\n", initrd_filename);
 326           exit(1);
 327         }
 328
 329         /* initialization which should be done by firmware */
 330         boot_params.loader_type = 1;
 331         boot_params.initrd_start = INITRD_LOAD_OFFSET;
 332         boot_params.initrd_size = initrd_size;
 333     }
 334
 335     if (kernel_cmdline) {
 336         /* I see no evidence that this .kernel_cmdline buffer requires
 337            NUL-termination, so using strncpy should be ok. */
 338         strncpy(boot_params.kernel_cmdline, kernel_cmdline,
 339                 sizeof(boot_params.kernel_cmdline));
 340     }
 341
 342     rom_add_blob_fixed("boot_params", &boot_params, sizeof(boot_params),
 343                        SDRAM_BASE + BOOT_PARAMS_OFFSET);
 344 }
 345
 346 static QEMUMachine r2d_machine = {
 347     .name = "r2d",
 348     .desc = "r2d-plus board",
 349     .init = r2d_init,
 350 };
 351
 352 static void r2d_machine_init(void)
 353 {
 354     qemu_register_machine(&r2d_machine);
 355 }
 356
 357 machine_init(r2d_machine_init);