hw/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 "sysbus.h"
  26 #include "hw.h"
  27 #include "serial.h"
  28 #include "net.h"
  29 #include "flash.h"
  30 #include "sysemu.h"
  31 #include "devices.h"
  32 #include "boards.h"
  33 #include "device_tree.h"
  34 #include "loader.h"
  35 #include "elf.h"
  36 #include "qemu-log.h"
  37 #include "exec-memory.h"
  38
  39 #include "ppc.h"
  40 #include "ppc4xx.h"
  41 #include "ppc405.h"
  42
  43 #include "blockdev.h"
  44 #include "xilinx.h"
  45
  46 #define EPAPR_MAGIC    (0x45504150)
  47 #define FLASH_SIZE     (16 * 1024 * 1024)
  48
  49 static struct boot_info
  50 {
  51     uint32_t bootstrap_pc;
  52     uint32_t cmdline;
  53     uint32_t fdt;
  54     uint32_t ima_size;
  55     void *vfdt;
  56 } boot_info;
  57
  58 /* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
  59 static void mmubooke_create_initial_mapping(CPUPPCState *env,
  60                                      target_ulong va,
  61                                      hwaddr pa)
  62 {
  63     ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
  64
  65     tlb->attr = 0;
  66     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
  67     tlb->size = 1 << 31; /* up to 0x80000000  */
  68     tlb->EPN = va & TARGET_PAGE_MASK;
  69     tlb->RPN = pa & TARGET_PAGE_MASK;
  70     tlb->PID = 0;
  71
  72     tlb = &env->tlb.tlbe[1];
  73     tlb->attr = 0;
  74     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
  75     tlb->size = 1 << 31; /* up to 0xffffffff  */
  76     tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;
  77     tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;
  78     tlb->PID = 0;
  79 }
  80
  81 static PowerPCCPU *ppc440_init_xilinx(ram_addr_t *ram_size,
  82                                       int do_init,
  83                                       const char *cpu_model,
  84                                       uint32_t sysclk)
  85 {
  86     PowerPCCPU *cpu;
  87     CPUPPCState *env;
  88     qemu_irq *irqs;
  89
  90     cpu = cpu_ppc_init(cpu_model);
  91     if (cpu == NULL) {
  92         fprintf(stderr, "Unable to initialize CPU!\n");
  93         exit(1);
  94     }
  95     env = &cpu->env;
  96
  97     ppc_booke_timers_init(env, sysclk, 0/* no flags */);
  98
  99     ppc_dcr_init(env, NULL, NULL);
 100
 101     /* interrupt controller */
 102     irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);
 103     irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 104     irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 105     ppcuic_init(env, irqs, 0x0C0, 0, 1);
 106     return cpu;
 107 }
 108
 109 static void main_cpu_reset(void *opaque)
 110 {
 111     PowerPCCPU *cpu = opaque;
 112     CPUPPCState *env = &cpu->env;
 113     struct boot_info *bi = env->load_info;
 114
 115     cpu_reset(CPU(cpu));
 116     /* Linux Kernel Parameters (passing device tree):
 117        *   r3: pointer to the fdt
 118        *   r4: 0
 119        *   r5: 0
 120        *   r6: epapr magic
 121        *   r7: size of IMA in bytes
 122        *   r8: 0
 123        *   r9: 0
 124     */
 125     env->gpr[1] = (16<<20) - 8;
 126     /* Provide a device-tree.  */
 127     env->gpr[3] = bi->fdt;
 128     env->nip = bi->bootstrap_pc;
 129
 130     /* Create a mapping for the kernel.  */
 131     mmubooke_create_initial_mapping(env, 0, 0);
 132     env->gpr[6] = tswap32(EPAPR_MAGIC);
 133     env->gpr[7] = bi->ima_size;
 134 }
 135
 136 #define BINARY_DEVICE_TREE_FILE "virtex-ml507.dtb"
 137 static int xilinx_load_device_tree(hwaddr addr,
 138                                       uint32_t ramsize,
 139                                       hwaddr initrd_base,
 140                                       hwaddr initrd_size,
 141                                       const char *kernel_cmdline)
 142 {
 143     char *path;
 144     int fdt_size;
 145 #ifdef CONFIG_FDT
 146     void *fdt;
 147     int r;
 148
 149     /* Try the local "ppc.dtb" override.  */
 150     fdt = load_device_tree("ppc.dtb", &fdt_size);
 151     if (!fdt) {
 152         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 153         if (path) {
 154             fdt = load_device_tree(path, &fdt_size);
 155             g_free(path);
 156         }
 157         if (!fdt) {
 158             return 0;
 159         }
 160     }
 161
 162     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 163     if (r < 0)
 164         fprintf(stderr, "couldn't set /chosen/bootargs\n");
 165     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
 166 #else
 167     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
 168        to the kernel.  */
 169     fdt_size = load_image_targphys("ppc.dtb", addr, 0x10000);
 170     if (fdt_size < 0) {
 171         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 172         if (path) {
 173             fdt_size = load_image_targphys(path, addr, 0x10000);
 174             g_free(path);
 175         }
 176     }
 177
 178     if (kernel_cmdline) {
 179         fprintf(stderr,
 180                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 181     }
 182 #endif
 183     return fdt_size;
 184 }
 185
 186 static void virtex_init(QEMUMachineInitArgs *args)
 187 {
 188     ram_addr_t ram_size = args->ram_size;
 189     const char *cpu_model = args->cpu_model;
 190     const char *kernel_filename = args->kernel_filename;
 191     const char *kernel_cmdline = args->kernel_cmdline;
 192     MemoryRegion *address_space_mem = get_system_memory();
 193     DeviceState *dev;
 194     PowerPCCPU *cpu;
 195     CPUPPCState *env;
 196     hwaddr ram_base = 0;
 197     DriveInfo *dinfo;
 198     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
 199     qemu_irq irq[32], *cpu_irq;
 200     int kernel_size;
 201     int i;
 202
 203     /* init CPUs */
 204     if (cpu_model == NULL) {
 205         cpu_model = "440-Xilinx";
 206     }
 207
 208     cpu = ppc440_init_xilinx(&ram_size, 1, cpu_model, 400000000);
 209     env = &cpu->env;
 210     qemu_register_reset(main_cpu_reset, cpu);
 211
 212     memory_region_init_ram(phys_ram, "ram", ram_size);
 213     vmstate_register_ram_global(phys_ram);
 214     memory_region_add_subregion(address_space_mem, ram_base, phys_ram);
 215
 216     dinfo = drive_get(IF_PFLASH, 0, 0);
 217     pflash_cfi01_register(0xfc000000, NULL, "virtex.flash", FLASH_SIZE,
 218                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
 219                           FLASH_SIZE >> 16,
 220                           1, 0x89, 0x18, 0x0000, 0x0, 1);
 221
 222     cpu_irq = (qemu_irq *) &env->irq_inputs[PPC40x_INPUT_INT];
 223     dev = xilinx_intc_create(0x81800000, cpu_irq[0], 0);
 224     for (i = 0; i < 32; i++) {
 225         irq[i] = qdev_get_gpio_in(dev, i);
 226     }
 227
 228     serial_mm_init(address_space_mem, 0x83e01003ULL, 2, irq[9], 115200,
 229                    serial_hds[0], DEVICE_LITTLE_ENDIAN);
 230
 231     /* 2 timers at irq 2 @ 62 Mhz.  */
 232     xilinx_timer_create(0x83c00000, irq[3], 0, 62 * 1000000);
 233
 234     if (kernel_filename) {
 235         uint64_t entry, low, high;
 236         hwaddr boot_offset;
 237
 238         /* Boots a kernel elf binary.  */
 239         kernel_size = load_elf(kernel_filename, NULL, NULL,
 240                                &entry, &low, &high, 1, ELF_MACHINE, 0);
 241         boot_info.bootstrap_pc = entry & 0x00ffffff;
 242
 243         if (kernel_size < 0) {
 244             boot_offset = 0x1200000;
 245             /* If we failed loading ELF's try a raw image.  */
 246             kernel_size = load_image_targphys(kernel_filename,
 247                                               boot_offset,
 248                                               ram_size);
 249             boot_info.bootstrap_pc = boot_offset;
 250             high = boot_info.bootstrap_pc + kernel_size + 8192;
 251         }
 252
 253         boot_info.ima_size = kernel_size;
 254
 255         /* Provide a device-tree.  */
 256         boot_info.fdt = high + (8192 * 2);
 257         boot_info.fdt &= ~8191;
 258         xilinx_load_device_tree(boot_info.fdt, ram_size, 0, 0, kernel_cmdline);
 259     }
 260     env->load_info = &boot_info;
 261 }
 262
 263 static QEMUMachine virtex_machine = {
 264     .name = "virtex-ml507",
 265     .desc = "Xilinx Virtex ML507 reference design",
 266     .init = virtex_init,
 267 };
 268
 269 static void virtex_machine_init(void)
 270 {
 271     qemu_register_machine(&virtex_machine);
 272 }
 273
 274 machine_init(virtex_machine_init);