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
  38 #include "ppc.h"
  39 #include "ppc4xx.h"
  40 #include "ppc440.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(CPUState *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 CPUState *ppc440_init_xilinx(ram_addr_t *ram_size,
  82                                     int do_init,
  83                                     const char *cpu_model,
  84                                     clk_setup_t *cpu_clk, clk_setup_t *tb_clk,
  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     cpu_clk->cb = NULL; /* We don't care about CPU clock frequency changes */
  97     cpu_clk->opaque = env;
  98     /* Set time-base frequency to sysclk */
  99     tb_clk->cb = ppc_emb_timers_init(env, sysclk, PPC_INTERRUPT_DECR);
 100     tb_clk->opaque = env;
 101
 102     ppc_dcr_init(env, NULL, NULL);
 103
 104     /* interrupt controller */
 105     irqs = qemu_mallocz(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);
 106     irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 107     irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 108     ppcuic_init(env, irqs, 0x0C0, 0, 1);
 109     return env;
 110 }
 111
 112 static void main_cpu_reset(void *opaque)
 113 {
 114     CPUState *env = opaque;
 115     struct boot_info *bi = env->load_info;
 116
 117     cpu_reset(env);
 118     /* Linux Kernel Parameters (passing device tree):
 119        *   r3: pointer to the fdt
 120        *   r4: 0
 121        *   r5: 0
 122        *   r6: epapr magic
 123        *   r7: size of IMA in bytes
 124        *   r8: 0
 125        *   r9: 0
 126     */
 127     env->gpr[1] = (16<<20) - 8;
 128     /* Provide a device-tree.  */
 129     env->gpr[3] = bi->fdt;
 130     env->nip = bi->bootstrap_pc;
 131
 132     /* Create a mapping for the kernel.  */
 133     mmubooke_create_initial_mapping(env, 0, 0);
 134     env->gpr[6] = tswap32(EPAPR_MAGIC);
 135     env->gpr[7] = bi->ima_size;
 136 }
 137
 138 #define BINARY_DEVICE_TREE_FILE "virtex-ml507.dtb"
 139 static int xilinx_load_device_tree(target_phys_addr_t addr,
 140                                       uint32_t ramsize,
 141                                       target_phys_addr_t initrd_base,
 142                                       target_phys_addr_t initrd_size,
 143                                       const char *kernel_cmdline)
 144 {
 145     char *path;
 146     int fdt_size;
 147 #ifdef CONFIG_FDT
 148     void *fdt;
 149     int r;
 150
 151     /* Try the local "ppc.dtb" override.  */
 152     fdt = load_device_tree("ppc.dtb", &fdt_size);
 153     if (!fdt) {
 154         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 155         if (path) {
 156             fdt = load_device_tree(path, &fdt_size);
 157             qemu_free(path);
 158         }
 159         if (!fdt) {
 160             return 0;
 161         }
 162     }
 163
 164     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 165     if (r < 0)
 166         fprintf(stderr, "couldn't set /chosen/bootargs\n");
 167     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
 168 #else
 169     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
 170        to the kernel.  */
 171     fdt_size = load_image_targphys("ppc.dtb", addr, 0x10000);
 172     if (fdt_size < 0) {
 173         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 174         if (path) {
 175             fdt_size = load_image_targphys(path, addr, 0x10000);
 176             qemu_free(path);
 177         }
 178     }
 179
 180     if (kernel_cmdline) {
 181         fprintf(stderr,
 182                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 183     }
 184 #endif
 185     return fdt_size;
 186 }
 187
 188 static void virtex_init(ram_addr_t ram_size,
 189                         const char *boot_device,
 190                         const char *kernel_filename,
 191                         const char *kernel_cmdline,
 192                         const char *initrd_filename, const char *cpu_model)
 193 {
 194     DeviceState *dev;
 195     CPUState *env;
 196     target_phys_addr_t ram_base = 0;
 197     DriveInfo *dinfo;
 198     ram_addr_t phys_ram;
 199     ram_addr_t phys_flash;
 200     qemu_irq irq[32], *cpu_irq;
 201     clk_setup_t clk_setup[7];
 202     int kernel_size;
 203     int i;
 204
 205     /* init CPUs */
 206     if (cpu_model == NULL) {
 207         cpu_model = "440-Xilinx";
 208     }
 209
 210     memset(clk_setup, 0, sizeof(clk_setup));
 211     env = ppc440_init_xilinx(&ram_size, 1, cpu_model, &clk_setup[0],
 212                              &clk_setup[1], 400000000);
 213     qemu_register_reset(main_cpu_reset, env);
 214
 215     phys_ram = qemu_ram_alloc(NULL, "ram", ram_size);
 216     cpu_register_physical_memory(ram_base, ram_size, phys_ram | IO_MEM_RAM);
 217
 218     phys_flash = qemu_ram_alloc(NULL, "virtex.flash", FLASH_SIZE);
 219     dinfo = drive_get(IF_PFLASH, 0, 0);
 220     pflash_cfi01_register(0xfc000000, phys_flash,
 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(0x83e01003ULL, 2, irq[9], 115200, serial_hds[0], 1, 0);
 232
 233     /* 2 timers at irq 2 @ 62 Mhz.  */
 234     xilinx_timer_create(0x83c00000, irq[3], 2, 62 * 1000000);
 235
 236     if (kernel_filename) {
 237         uint64_t entry, low, high;
 238         target_phys_addr_t boot_offset;
 239
 240         /* Boots a kernel elf binary.  */
 241         kernel_size = load_elf(kernel_filename, NULL, NULL,
 242                                &entry, &low, &high, 1, ELF_MACHINE, 0);
 243         boot_info.bootstrap_pc = entry & 0x00ffffff;
 244
 245         if (kernel_size < 0) {
 246             boot_offset = 0x1200000;
 247             /* If we failed loading ELF's try a raw image.  */
 248             kernel_size = load_image_targphys(kernel_filename,
 249                                               boot_offset,
 250                                               ram_size);
 251             boot_info.bootstrap_pc = boot_offset;
 252             high = boot_info.bootstrap_pc + kernel_size + 8192;
 253         }
 254
 255         boot_info.ima_size = kernel_size;
 256
 257         /* Provide a device-tree.  */
 258         boot_info.fdt = high + (8192 * 2);
 259         boot_info.fdt &= ~8191;
 260         xilinx_load_device_tree(boot_info.fdt, ram_size, 0, 0, kernel_cmdline);
 261     }
 262     env->load_info = &boot_info;
 263 }
 264
 265 static QEMUMachine virtex_machine = {
 266     .name = "virtex-ml507",
 267     .desc = "Xilinx Virtex ML507 reference design",
 268     .init = virtex_init,
 269 };
 270
 271 static void virtex_machine_init(void)
 272 {
 273     qemu_register_machine(&virtex_machine);
 274 }
 275
 276 machine_init(virtex_machine_init);