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 "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 "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                                      target_phys_addr_t 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 CPUPPCState *ppc440_init_xilinx(ram_addr_t *ram_size,
  82                                     int do_init,
  83                                     const char *cpu_model,
  84                                     uint32_t sysclk)
  85 {
  86     CPUPPCState *env;
  87     qemu_irq *irqs;
  88
  89     env = cpu_init(cpu_model);
  90     if (!env) {
  91         fprintf(stderr, "Unable to initialize CPU!\n");
  92         exit(1);
  93     }
  94
  95     ppc_booke_timers_init(env, sysclk, 0/* no flags */);
  96
  97     ppc_dcr_init(env, NULL, NULL);
  98
  99     /* interrupt controller */
 100     irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);
 101     irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 102     irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 103     ppcuic_init(env, irqs, 0x0C0, 0, 1);
 104     return env;
 105 }
 106
 107 static void main_cpu_reset(void *opaque)
 108 {
 109     CPUPPCState *env = opaque;
 110     struct boot_info *bi = env->load_info;
 111
 112     cpu_state_reset(env);
 113     /* Linux Kernel Parameters (passing device tree):
 114        *   r3: pointer to the fdt
 115        *   r4: 0
 116        *   r5: 0
 117        *   r6: epapr magic
 118        *   r7: size of IMA in bytes
 119        *   r8: 0
 120        *   r9: 0
 121     */
 122     env->gpr[1] = (16<<20) - 8;
 123     /* Provide a device-tree.  */
 124     env->gpr[3] = bi->fdt;
 125     env->nip = bi->bootstrap_pc;
 126
 127     /* Create a mapping for the kernel.  */
 128     mmubooke_create_initial_mapping(env, 0, 0);
 129     env->gpr[6] = tswap32(EPAPR_MAGIC);
 130     env->gpr[7] = bi->ima_size;
 131 }
 132
 133 #define BINARY_DEVICE_TREE_FILE "virtex-ml507.dtb"
 134 static int xilinx_load_device_tree(target_phys_addr_t addr,
 135                                       uint32_t ramsize,
 136                                       target_phys_addr_t initrd_base,
 137                                       target_phys_addr_t initrd_size,
 138                                       const char *kernel_cmdline)
 139 {
 140     char *path;
 141     int fdt_size;
 142 #ifdef CONFIG_FDT
 143     void *fdt;
 144     int r;
 145
 146     /* Try the local "ppc.dtb" override.  */
 147     fdt = load_device_tree("ppc.dtb", &fdt_size);
 148     if (!fdt) {
 149         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 150         if (path) {
 151             fdt = load_device_tree(path, &fdt_size);
 152             g_free(path);
 153         }
 154         if (!fdt) {
 155             return 0;
 156         }
 157     }
 158
 159     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 160     if (r < 0)
 161         fprintf(stderr, "couldn't set /chosen/bootargs\n");
 162     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
 163 #else
 164     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
 165        to the kernel.  */
 166     fdt_size = load_image_targphys("ppc.dtb", addr, 0x10000);
 167     if (fdt_size < 0) {
 168         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 169         if (path) {
 170             fdt_size = load_image_targphys(path, addr, 0x10000);
 171             g_free(path);
 172         }
 173     }
 174
 175     if (kernel_cmdline) {
 176         fprintf(stderr,
 177                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 178     }
 179 #endif
 180     return fdt_size;
 181 }
 182
 183 static void virtex_init(ram_addr_t ram_size,
 184                         const char *boot_device,
 185                         const char *kernel_filename,
 186                         const char *kernel_cmdline,
 187                         const char *initrd_filename, const char *cpu_model)
 188 {
 189     MemoryRegion *address_space_mem = get_system_memory();
 190     DeviceState *dev;
 191     CPUPPCState *env;
 192     target_phys_addr_t ram_base = 0;
 193     DriveInfo *dinfo;
 194     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
 195     qemu_irq irq[32], *cpu_irq;
 196     int kernel_size;
 197     int i;
 198
 199     /* init CPUs */
 200     if (cpu_model == NULL) {
 201         cpu_model = "440-Xilinx";
 202     }
 203
 204     env = ppc440_init_xilinx(&ram_size, 1, cpu_model, 400000000);
 205     qemu_register_reset(main_cpu_reset, env);
 206
 207     memory_region_init_ram(phys_ram, "ram", ram_size);
 208     vmstate_register_ram_global(phys_ram);
 209     memory_region_add_subregion(address_space_mem, ram_base, phys_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
 258 static QEMUMachine virtex_machine = {
 259     .name = "virtex-ml507",
 260     .desc = "Xilinx Virtex ML507 reference design",
 261     .init = virtex_init,
 262 };
 263
 264 static void virtex_machine_init(void)
 265 {
 266     qemu_register_machine(&virtex_machine);
 267 }
 268
 269 machine_init(virtex_machine_init);