LXR qemu/hw/virtex

   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 "pc.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 "ppc440.h"
  42#include "ppc405.h"
  43
  44#include "blockdev.h"
  45#include "xilinx.h"
  46
  47#define EPAPR_MAGIC    (0x45504150)
  48#define FLASH_SIZE     (16 * 1024 * 1024)
  49
  50static struct boot_info
  51{
  52    uint32_t bootstrap_pc;
  53    uint32_t cmdline;
  54    uint32_t fdt;
  55    uint32_t ima_size;
  56    void *vfdt;
  57} boot_info;
  58
  59/* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
  60static void mmubooke_create_initial_mapping(CPUState *env,
  61                                     target_ulong va,
  62                                     target_phys_addr_t pa)
  63{
  64    ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
  65
  66    tlb->attr = 0;
  67    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
  68    tlb->size = 1 << 31; /* up to 0x80000000  */
  69    tlb->EPN = va & TARGET_PAGE_MASK;
  70    tlb->RPN = pa & TARGET_PAGE_MASK;
  71    tlb->PID = 0;
  72
  73    tlb = &env->tlb.tlbe[1];
  74    tlb->attr = 0;
  75    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
  76    tlb->size = 1 << 31; /* up to 0xffffffff  */
  77    tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;
  78    tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;
  79    tlb->PID = 0;
  80}
  81
  82static CPUState *ppc440_init_xilinx(ram_addr_t *ram_size,
  83                                    int do_init,
  84                                    const char *cpu_model,
  85                                    uint32_t sysclk)
  86{
  87    CPUState *env;
  88    qemu_irq *irqs;
  89
  90    env = cpu_init(cpu_model);
  91    if (!env) {
  92        fprintf(stderr, "Unable to initialize CPU!\n");
  93        exit(1);
  94    }
  95
  96    ppc_booke_timers_init(env, sysclk, 0/* no flags */);
  97
  98    ppc_dcr_init(env, NULL, NULL);
  99
 100    /* interrupt controller */
 101    irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);
 102    irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 103    irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 104    ppcuic_init(env, irqs, 0x0C0, 0, 1);
 105    return env;
 106}
 107
 108static void main_cpu_reset(void *opaque)
 109{
 110    CPUState *env = opaque;
 111    struct boot_info *bi = env->load_info;
 112
 113    cpu_reset(env);
 114    /* Linux Kernel Parameters (passing device tree):
 115       *   r3: pointer to the fdt
 116       *   r4: 0
 117       *   r5: 0
 118       *   r6: epapr magic
 119       *   r7: size of IMA in bytes
 120       *   r8: 0
 121       *   r9: 0
 122    */
 123    env->gpr[1] = (16<<20) - 8;
 124    /* Provide a device-tree.  */
 125    env->gpr[3] = bi->fdt;
 126    env->nip = bi->bootstrap_pc;
 127
 128    /* Create a mapping for the kernel.  */
 129    mmubooke_create_initial_mapping(env, 0, 0);
 130    env->gpr[6] = tswap32(EPAPR_MAGIC);
 131    env->gpr[7] = bi->ima_size;
 132}
 133
 134#define BINARY_DEVICE_TREE_FILE "virtex-ml507.dtb"
 135static int xilinx_load_device_tree(target_phys_addr_t addr,
 136                                      uint32_t ramsize,
 137                                      target_phys_addr_t initrd_base,
 138                                      target_phys_addr_t initrd_size,
 139                                      const char *kernel_cmdline)
 140{
 141    char *path;
 142    int fdt_size;
 143#ifdef CONFIG_FDT
 144    void *fdt;
 145    int r;
 146
 147    /* Try the local "ppc.dtb" override.  */
 148    fdt = load_device_tree("ppc.dtb", &fdt_size);
 149    if (!fdt) {
 150        path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 151        if (path) {
 152            fdt = load_device_tree(path, &fdt_size);
 153            g_free(path);
 154        }
 155        if (!fdt) {
 156            return 0;
 157        }
 158    }
 159
 160    r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 161    if (r < 0)
 162        fprintf(stderr, "couldn't set /chosen/bootargs\n");
 163    cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
 164#else
 165    /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
 166       to the kernel.  */
 167    fdt_size = load_image_targphys("ppc.dtb", addr, 0x10000);
 168    if (fdt_size < 0) {
 169        path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 170        if (path) {
 171            fdt_size = load_image_targphys(path, addr, 0x10000);
 172            g_free(path);
 173        }
 174    }
 175
 176    if (kernel_cmdline) {
 177        fprintf(stderr,
 178                "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 179    }
 180#endif
 181    return fdt_size;
 182}
 183
 184static void virtex_init(ram_addr_t ram_size,
 185                        const char *boot_device,
 186                        const char *kernel_filename,
 187                        const char *kernel_cmdline,
 188                        const char *initrd_filename, const char *cpu_model)
 189{
 190    MemoryRegion *address_space_mem = get_system_memory();
 191    DeviceState *dev;
 192    CPUState *env;
 193    target_phys_addr_t ram_base = 0;
 194    DriveInfo *dinfo;
 195    ram_addr_t phys_ram;
 196    qemu_irq irq[32], *cpu_irq;
 197    int kernel_size;
 198    int i;
 199
 200    /* init CPUs */
 201    if (cpu_model == NULL) {
 202        cpu_model = "440-Xilinx";
 203    }
 204
 205    env = ppc440_init_xilinx(&ram_size, 1, cpu_model, 400000000);
 206    qemu_register_reset(main_cpu_reset, env);
 207
 208    phys_ram = qemu_ram_alloc(NULL, "ram", ram_size);
 209    cpu_register_physical_memory(ram_base, ram_size, phys_ram | IO_MEM_RAM);
 210
 211    dinfo = drive_get(IF_PFLASH, 0, 0);
 212    pflash_cfi01_register(0xfc000000, NULL, "virtex.flash", FLASH_SIZE,
 213                          dinfo ? dinfo->bdrv : NULL, (64 * 1024),
 214                          FLASH_SIZE >> 16,
 215                          1, 0x89, 0x18, 0x0000, 0x0, 1);
 216
 217    cpu_irq = (qemu_irq *) &env->irq_inputs[PPC40x_INPUT_INT];
 218    dev = xilinx_intc_create(0x81800000, cpu_irq[0], 0);
 219    for (i = 0; i < 32; i++) {
 220        irq[i] = qdev_get_gpio_in(dev, i);
 221    }
 222
 223    serial_mm_init(address_space_mem, 0x83e01003ULL, 2, irq[9], 115200,
 224                   serial_hds[0], DEVICE_LITTLE_ENDIAN);
 225
 226    /* 2 timers at irq 2 @ 62 Mhz.  */
 227    xilinx_timer_create(0x83c00000, irq[3], 2, 62 * 1000000);
 228
 229    if (kernel_filename) {
 230        uint64_t entry, low, high;
 231        target_phys_addr_t boot_offset;
 232
 233        /* Boots a kernel elf binary.  */
 234        kernel_size = load_elf(kernel_filename, NULL, NULL,
 235                               &entry, &low, &high, 1, ELF_MACHINE, 0);
 236        boot_info.bootstrap_pc = entry & 0x00ffffff;
 237
 238        if (kernel_size < 0) {
 239            boot_offset = 0x1200000;
 240            /* If we failed loading ELF's try a raw image.  */
 241            kernel_size = load_image_targphys(kernel_filename,
 242                                              boot_offset,
 243                                              ram_size);
 244            boot_info.bootstrap_pc = boot_offset;
 245            high = boot_info.bootstrap_pc + kernel_size + 8192;
 246        }
 247
 248        boot_info.ima_size = kernel_size;
 249
 250        /* Provide a device-tree.  */
 251        boot_info.fdt = high + (8192 * 2);
 252        boot_info.fdt &= ~8191;
 253        xilinx_load_device_tree(boot_info.fdt, ram_size, 0, 0, kernel_cmdline);
 254    }
 255    env->load_info = &boot_info;
 256}
 257
 258static QEMUMachine virtex_machine = {
 259    .name = "virtex-ml507",
 260    .desc = "Xilinx Virtex ML507 reference design",
 261    .init = virtex_init,
 262};
 263
 264static void virtex_machine_init(void)
 265{
 266    qemu_register_machine(&virtex_machine);
 267}
 268
 269machine_init(virtex_machine_init);
 270