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 "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
  50 static 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.  */
  60 static 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
  82 static CPUState *ppc440_init_xilinx(ram_addr_t *ram_size,
  83                                     int do_init,
  84                                     const char *cpu_model,
  85                                     clk_setup_t *cpu_clk, clk_setup_t *tb_clk,
  86                                     uint32_t sysclk)
  87 {
  88     CPUState *env;
  89     qemu_irq *irqs;
  90
  91     env = cpu_init(cpu_model);
  92     if (!env) {
  93         fprintf(stderr, "Unable to initialize CPU!\n");
  94         exit(1);
  95     }
  96
  97     cpu_clk->cb = NULL; /* We don't care about CPU clock frequency changes */
  98     cpu_clk->opaque = env;
  99     /* Set time-base frequency to sysclk */
 100     tb_clk->cb = ppc_emb_timers_init(env, sysclk, PPC_INTERRUPT_DECR);
 101     tb_clk->opaque = env;
 102
 103     ppc_dcr_init(env, NULL, NULL);
 104
 105     /* interrupt controller */
 106     irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);
 107     irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 108     irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 109     ppcuic_init(env, irqs, 0x0C0, 0, 1);
 110     return env;
 111 }
 112
 113 static void main_cpu_reset(void *opaque)
 114 {
 115     CPUState *env = opaque;
 116     struct boot_info *bi = env->load_info;
 117
 118     cpu_reset(env);
 119     /* Linux Kernel Parameters (passing device tree):
 120        *   r3: pointer to the fdt
 121        *   r4: 0
 122        *   r5: 0
 123        *   r6: epapr magic
 124        *   r7: size of IMA in bytes
 125        *   r8: 0
 126        *   r9: 0
 127     */
 128     env->gpr[1] = (16<<20) - 8;
 129     /* Provide a device-tree.  */
 130     env->gpr[3] = bi->fdt;
 131     env->nip = bi->bootstrap_pc;
 132
 133     /* Create a mapping for the kernel.  */
 134     mmubooke_create_initial_mapping(env, 0, 0);
 135     env->gpr[6] = tswap32(EPAPR_MAGIC);
 136     env->gpr[7] = bi->ima_size;
 137 }
 138
 139 #define BINARY_DEVICE_TREE_FILE "virtex-ml507.dtb"
 140 static int xilinx_load_device_tree(target_phys_addr_t addr,
 141                                       uint32_t ramsize,
 142                                       target_phys_addr_t initrd_base,
 143                                       target_phys_addr_t initrd_size,
 144                                       const char *kernel_cmdline)
 145 {
 146     char *path;
 147     int fdt_size;
 148 #ifdef CONFIG_FDT
 149     void *fdt;
 150     int r;
 151
 152     /* Try the local "ppc.dtb" override.  */
 153     fdt = load_device_tree("ppc.dtb", &fdt_size);
 154     if (!fdt) {
 155         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 156         if (path) {
 157             fdt = load_device_tree(path, &fdt_size);
 158             g_free(path);
 159         }
 160         if (!fdt) {
 161             return 0;
 162         }
 163     }
 164
 165     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 166     if (r < 0)
 167         fprintf(stderr, "couldn't set /chosen/bootargs\n");
 168     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
 169 #else
 170     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
 171        to the kernel.  */
 172     fdt_size = load_image_targphys("ppc.dtb", addr, 0x10000);
 173     if (fdt_size < 0) {
 174         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 175         if (path) {
 176             fdt_size = load_image_targphys(path, addr, 0x10000);
 177             g_free(path);
 178         }
 179     }
 180
 181     if (kernel_cmdline) {
 182         fprintf(stderr,
 183                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 184     }
 185 #endif
 186     return fdt_size;
 187 }
 188
 189 static void virtex_init(ram_addr_t ram_size,
 190                         const char *boot_device,
 191                         const char *kernel_filename,
 192                         const char *kernel_cmdline,
 193                         const char *initrd_filename, const char *cpu_model)
 194 {
 195     MemoryRegion *address_space_mem = get_system_memory();
 196     DeviceState *dev;
 197     CPUState *env;
 198     target_phys_addr_t ram_base = 0;
 199     DriveInfo *dinfo;
 200     ram_addr_t phys_ram;
 201     qemu_irq irq[32], *cpu_irq;
 202     clk_setup_t clk_setup[7];
 203     int kernel_size;
 204     int i;
 205
 206     /* init CPUs */
 207     if (cpu_model == NULL) {
 208         cpu_model = "440-Xilinx";
 209     }
 210
 211     memset(clk_setup, 0, sizeof(clk_setup));
 212     env = ppc440_init_xilinx(&ram_size, 1, cpu_model, &clk_setup[0],
 213                              &clk_setup[1], 400000000);
 214     qemu_register_reset(main_cpu_reset, env);
 215
 216     phys_ram = qemu_ram_alloc(NULL, "ram", ram_size);
 217     cpu_register_physical_memory(ram_base, ram_size, phys_ram | IO_MEM_RAM);
 218
 219     dinfo = drive_get(IF_PFLASH, 0, 0);
 220     pflash_cfi01_register(0xfc000000, NULL, "virtex.flash", FLASH_SIZE,
 221                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
 222                           FLASH_SIZE >> 16,
 223                           1, 0x89, 0x18, 0x0000, 0x0, 1);
 224
 225     cpu_irq = (qemu_irq *) &env->irq_inputs[PPC40x_INPUT_INT];
 226     dev = xilinx_intc_create(0x81800000, cpu_irq[0], 0);
 227     for (i = 0; i < 32; i++) {
 228         irq[i] = qdev_get_gpio_in(dev, i);
 229     }
 230
 231     serial_mm_init(address_space_mem, 0x83e01003ULL, 2, irq[9], 115200,
 232                    serial_hds[0], DEVICE_LITTLE_ENDIAN);
 233
 234     /* 2 timers at irq 2 @ 62 Mhz.  */
 235     xilinx_timer_create(0x83c00000, irq[3], 2, 62 * 1000000);
 236
 237     if (kernel_filename) {
 238         uint64_t entry, low, high;
 239         target_phys_addr_t boot_offset;
 240
 241         /* Boots a kernel elf binary.  */
 242         kernel_size = load_elf(kernel_filename, NULL, NULL,
 243                                &entry, &low, &high, 1, ELF_MACHINE, 0);
 244         boot_info.bootstrap_pc = entry & 0x00ffffff;
 245
 246         if (kernel_size < 0) {
 247             boot_offset = 0x1200000;
 248             /* If we failed loading ELF's try a raw image.  */
 249             kernel_size = load_image_targphys(kernel_filename,
 250                                               boot_offset,
 251                                               ram_size);
 252             boot_info.bootstrap_pc = boot_offset;
 253             high = boot_info.bootstrap_pc + kernel_size + 8192;
 254         }
 255
 256         boot_info.ima_size = kernel_size;
 257
 258         /* Provide a device-tree.  */
 259         boot_info.fdt = high + (8192 * 2);
 260         boot_info.fdt &= ~8191;
 261         xilinx_load_device_tree(boot_info.fdt, ram_size, 0, 0, kernel_cmdline);
 262     }
 263     env->load_info = &boot_info;
 264 }
 265
 266 static QEMUMachine virtex_machine = {
 267     .name = "virtex-ml507",
 268     .desc = "Xilinx Virtex ML507 reference design",
 269     .init = virtex_init,
 270 };
 271
 272 static void virtex_machine_init(void)
 273 {
 274     qemu_register_machine(&virtex_machine);
 275 }
 276
 277 machine_init(virtex_machine_init);