hw/ppc/virtex_ml507.c

   1 /*
   2  * Model of Xilinx Virtex5 ML507 PPC-440 refdesign.
   3  *
   4  * Copyright (c) 2010 Edgar E. Iglesias.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "hw/sysbus.h"
  26 #include "hw/hw.h"
  27 #include "hw/char/serial.h"
  28 #include "hw/block/flash.h"
  29 #include "sysemu/sysemu.h"
  30 #include "hw/devices.h"
  31 #include "hw/boards.h"
  32 #include "sysemu/device_tree.h"
  33 #include "hw/loader.h"
  34 #include "elf.h"
  35 #include "qemu/error-report.h"
  36 #include "qemu/log.h"
  37 #include "exec/address-spaces.h"
  38
  39 #include "hw/ppc/ppc.h"
  40 #include "hw/ppc/ppc4xx.h"
  41 #include "ppc405.h"
  42
  43 #include "sysemu/block-backend.h"
  44
  45 #define EPAPR_MAGIC    (0x45504150)
  46 #define FLASH_SIZE     (16 * 1024 * 1024)
  47
  48 #define INTC_BASEADDR       0x81800000
  49 #define UART16550_BASEADDR  0x83e01003
  50 #define TIMER_BASEADDR      0x83c00000
  51 #define PFLASH_BASEADDR     0xfc000000
  52
  53 #define TIMER_IRQ           3
  54 #define UART16550_IRQ       9
  55
  56 static struct boot_info
  57 {
  58     uint32_t bootstrap_pc;
  59     uint32_t cmdline;
  60     uint32_t fdt;
  61     uint32_t ima_size;
  62     void *vfdt;
  63 } boot_info;
  64
  65 /* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
  66 static void mmubooke_create_initial_mapping(CPUPPCState *env,
  67                                      target_ulong va,
  68                                      hwaddr pa)
  69 {
  70     ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
  71
  72     tlb->attr = 0;
  73     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
  74     tlb->size = 1U << 31; /* up to 0x80000000  */
  75     tlb->EPN = va & TARGET_PAGE_MASK;
  76     tlb->RPN = pa & TARGET_PAGE_MASK;
  77     tlb->PID = 0;
  78
  79     tlb = &env->tlb.tlbe[1];
  80     tlb->attr = 0;
  81     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
  82     tlb->size = 1U << 31; /* up to 0xffffffff  */
  83     tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;
  84     tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;
  85     tlb->PID = 0;
  86 }
  87
  88 static PowerPCCPU *ppc440_init_xilinx(ram_addr_t *ram_size,
  89                                       int do_init,
  90                                       const char *cpu_model,
  91                                       uint32_t sysclk)
  92 {
  93     PowerPCCPU *cpu;
  94     CPUPPCState *env;
  95     qemu_irq *irqs;
  96
  97     cpu = cpu_ppc_init(cpu_model);
  98     if (cpu == NULL) {
  99         fprintf(stderr, "Unable to initialize CPU!\n");
 100         exit(1);
 101     }
 102     env = &cpu->env;
 103
 104     ppc_booke_timers_init(cpu, sysclk, 0/* no flags */);
 105
 106     ppc_dcr_init(env, NULL, NULL);
 107
 108     /* interrupt controller */
 109     irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);
 110     irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 111     irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 112     ppcuic_init(env, irqs, 0x0C0, 0, 1);
 113     return cpu;
 114 }
 115
 116 static void main_cpu_reset(void *opaque)
 117 {
 118     PowerPCCPU *cpu = opaque;
 119     CPUPPCState *env = &cpu->env;
 120     struct boot_info *bi = env->load_info;
 121
 122     cpu_reset(CPU(cpu));
 123     /* Linux Kernel Parameters (passing device tree):
 124        *   r3: pointer to the fdt
 125        *   r4: 0
 126        *   r5: 0
 127        *   r6: epapr magic
 128        *   r7: size of IMA in bytes
 129        *   r8: 0
 130        *   r9: 0
 131     */
 132     env->gpr[1] = (16<<20) - 8;
 133     /* Provide a device-tree.  */
 134     env->gpr[3] = bi->fdt;
 135     env->nip = bi->bootstrap_pc;
 136
 137     /* Create a mapping for the kernel.  */
 138     mmubooke_create_initial_mapping(env, 0, 0);
 139     env->gpr[6] = tswap32(EPAPR_MAGIC);
 140     env->gpr[7] = bi->ima_size;
 141 }
 142
 143 #define BINARY_DEVICE_TREE_FILE "virtex-ml507.dtb"
 144 static int xilinx_load_device_tree(hwaddr addr,
 145                                       uint32_t ramsize,
 146                                       hwaddr initrd_base,
 147                                       hwaddr initrd_size,
 148                                       const char *kernel_cmdline)
 149 {
 150     char *path;
 151     int fdt_size;
 152     void *fdt = NULL;
 153     int r;
 154     const char *dtb_filename;
 155
 156     dtb_filename = qemu_opt_get(qemu_get_machine_opts(), "dtb");
 157     if (dtb_filename) {
 158         fdt = load_device_tree(dtb_filename, &fdt_size);
 159         if (!fdt) {
 160             error_report("Error while loading device tree file '%s'",
 161                 dtb_filename);
 162         }
 163     } else {
 164         /* Try the local "ppc.dtb" override.  */
 165         fdt = load_device_tree("ppc.dtb", &fdt_size);
 166         if (!fdt) {
 167             path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 168             if (path) {
 169                 fdt = load_device_tree(path, &fdt_size);
 170                 g_free(path);
 171             }
 172         }
 173     }
 174     if (!fdt) {
 175         return 0;
 176     }
 177
 178     r = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
 179                               initrd_base);
 180     if (r < 0) {
 181         error_report("couldn't set /chosen/linux,initrd-start");
 182     }
 183
 184     r = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
 185                               (initrd_base + initrd_size));
 186     if (r < 0) {
 187         error_report("couldn't set /chosen/linux,initrd-end");
 188     }
 189
 190     r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 191     if (r < 0)
 192         fprintf(stderr, "couldn't set /chosen/bootargs\n");
 193     cpu_physical_memory_write(addr, fdt, fdt_size);
 194     return fdt_size;
 195 }
 196
 197 static void virtex_init(MachineState *machine)
 198 {
 199     ram_addr_t ram_size = machine->ram_size;
 200     const char *kernel_filename = machine->kernel_filename;
 201     const char *kernel_cmdline = machine->kernel_cmdline;
 202     hwaddr initrd_base = 0;
 203     int initrd_size = 0;
 204     MemoryRegion *address_space_mem = get_system_memory();
 205     DeviceState *dev;
 206     PowerPCCPU *cpu;
 207     CPUPPCState *env;
 208     hwaddr ram_base = 0;
 209     DriveInfo *dinfo;
 210     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
 211     qemu_irq irq[32], *cpu_irq;
 212     int kernel_size;
 213     int i;
 214
 215     /* init CPUs */
 216     if (machine->cpu_model == NULL) {
 217         machine->cpu_model = "440-Xilinx";
 218     }
 219
 220     cpu = ppc440_init_xilinx(&ram_size, 1, machine->cpu_model, 400000000);
 221     env = &cpu->env;
 222     qemu_register_reset(main_cpu_reset, cpu);
 223
 224     memory_region_allocate_system_memory(phys_ram, NULL, "ram", ram_size);
 225     memory_region_add_subregion(address_space_mem, ram_base, phys_ram);
 226
 227     dinfo = drive_get(IF_PFLASH, 0, 0);
 228     pflash_cfi01_register(PFLASH_BASEADDR, NULL, "virtex.flash", FLASH_SIZE,
 229                           dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 230                           (64 * 1024), FLASH_SIZE >> 16,
 231                           1, 0x89, 0x18, 0x0000, 0x0, 1);
 232
 233     cpu_irq = (qemu_irq *) &env->irq_inputs[PPC40x_INPUT_INT];
 234     dev = qdev_create(NULL, "xlnx.xps-intc");
 235     qdev_prop_set_uint32(dev, "kind-of-intr", 0);
 236     qdev_init_nofail(dev);
 237     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, INTC_BASEADDR);
 238     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, cpu_irq[0]);
 239     for (i = 0; i < 32; i++) {
 240         irq[i] = qdev_get_gpio_in(dev, i);
 241     }
 242
 243     serial_mm_init(address_space_mem, UART16550_BASEADDR, 2, irq[UART16550_IRQ],
 244                    115200, serial_hds[0], DEVICE_LITTLE_ENDIAN);
 245
 246     /* 2 timers at irq 2 @ 62 Mhz.  */
 247     dev = qdev_create(NULL, "xlnx.xps-timer");
 248     qdev_prop_set_uint32(dev, "one-timer-only", 0);
 249     qdev_prop_set_uint32(dev, "clock-frequency", 62 * 1000000);
 250     qdev_init_nofail(dev);
 251     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, TIMER_BASEADDR);
 252     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[TIMER_IRQ]);
 253
 254     if (kernel_filename) {
 255         uint64_t entry, low, high;
 256         hwaddr boot_offset;
 257
 258         /* Boots a kernel elf binary.  */
 259         kernel_size = load_elf(kernel_filename, NULL, NULL,
 260                                &entry, &low, &high, 1, ELF_MACHINE, 0);
 261         boot_info.bootstrap_pc = entry & 0x00ffffff;
 262
 263         if (kernel_size < 0) {
 264             boot_offset = 0x1200000;
 265             /* If we failed loading ELF's try a raw image.  */
 266             kernel_size = load_image_targphys(kernel_filename,
 267                                               boot_offset,
 268                                               ram_size);
 269             boot_info.bootstrap_pc = boot_offset;
 270             high = boot_info.bootstrap_pc + kernel_size + 8192;
 271         }
 272
 273         boot_info.ima_size = kernel_size;
 274
 275         /* Load initrd. */
 276         if (machine->initrd_filename) {
 277             initrd_base = high = ROUND_UP(high, 4);
 278             initrd_size = load_image_targphys(machine->initrd_filename,
 279                                               high, ram_size - high);
 280
 281             if (initrd_size < 0) {
 282                 error_report("couldn't load ram disk '%s'",
 283                              machine->initrd_filename);
 284                 exit(1);
 285             }
 286             high = ROUND_UP(high + initrd_size, 4);
 287         }
 288
 289         /* Provide a device-tree.  */
 290         boot_info.fdt = high + (8192 * 2);
 291         boot_info.fdt &= ~8191;
 292
 293         xilinx_load_device_tree(boot_info.fdt, ram_size,
 294                                 initrd_base, initrd_size,
 295                                 kernel_cmdline);
 296     }
 297     env->load_info = &boot_info;
 298 }
 299
 300 static QEMUMachine virtex_machine = {
 301     .name = "virtex-ml507",
 302     .desc = "Xilinx Virtex ML507 reference design",
 303     .init = virtex_init,
 304 };
 305
 306 static void virtex_machine_init(void)
 307 {
 308     qemu_register_machine(&virtex_machine);
 309 }
 310
 311 machine_init(virtex_machine_init);