microblaze: Add PetaLogix ml605 MMU little-endian ref design

Add the first Microblaze little endian platform.
Platform uses uart16550, axi ethernet, timer, intc.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>

1 files changed, 267 insertions, 0 deletions

diff --git a/hw/petalogix_ml605_mmu.c b/hw/petalogix_ml605_mmu.c
new file mode 100644
index 0000000000..ca0986a0ef
--- /dev/null
+++ b/hw/petalogix_ml605_mmu.c
@@ -0,0 +1,267 @@
+/*
+ * Model of Petalogix linux reference design targeting Xilinx Spartan ml605
+ * board.
+ *
+ * Copyright (c) 2011 Michal Simek <monstr@monstr.eu>
+ * Copyright (c) 2011 PetaLogix
+ * Copyright (c) 2009 Edgar E. Iglesias.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "sysbus.h"
+#include "hw.h"
+#include "net.h"
+#include "flash.h"
+#include "sysemu.h"
+#include "devices.h"
+#include "boards.h"
+#include "device_tree.h"
+#include "xilinx.h"
+#include "loader.h"
+#include "elf.h"
+#include "blockdev.h"
+#include "pc.h"
+
+#include "xilinx_axidma.h"
+
+#define LMB_BRAM_SIZE  (128 * 1024)
+#define FLASH_SIZE     (32 * 1024 * 1024)
+
+static struct
+{
+    uint32_t bootstrap_pc;
+    uint32_t cmdline;
+    uint32_t fdt;
+} boot_info;
+
+static void main_cpu_reset(void *opaque)
+{
+    CPUState *env = opaque;
+
+    cpu_reset(env);
+    env->regs[5] = boot_info.cmdline;
+    env->regs[7] = boot_info.fdt;
+    env->sregs[SR_PC] = boot_info.bootstrap_pc;
+    env->pvr.regs[10] = 0x0e000000; /* virtex 6 */
+    /* setup pvr to match kernel setting */
+    env->pvr.regs[5] |= PVR5_DCACHE_WRITEBACK_MASK;
+    env->pvr.regs[0] |= PVR0_USE_FPU_MASK | PVR0_ENDI;
+    env->pvr.regs[0] = (env->pvr.regs[0] & ~PVR0_VERSION_MASK) | (0x14 << 8);
+    env->pvr.regs[2] ^= PVR2_USE_FPU2_MASK;
+    env->pvr.regs[4] = 0xc56b8000;
+    env->pvr.regs[5] = 0xc56be000;
+}
+
+#define BINARY_DEVICE_TREE_FILE "petalogix-ml605.dtb"
+static int petalogix_load_device_tree(target_phys_addr_t addr,
+                                      uint32_t ramsize,
+                                      target_phys_addr_t initrd_base,
+                                      target_phys_addr_t initrd_size,
+                                      const char *kernel_cmdline)
+{
+    char *path;
+    int fdt_size;
+#ifdef CONFIG_FDT
+    void *fdt;
+    int r;
+
+    /* Try the local "mb.dtb" override.  */
+    fdt = load_device_tree("mb.dtb", &fdt_size);
+    if (!fdt) {
+        path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+        if (path) {
+            fdt = load_device_tree(path, &fdt_size);
+            qemu_free(path);
+        }
+        if (!fdt) {
+            return 0;
+        }
+    }
+
+    r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
+    if (r < 0) {
+        fprintf(stderr, "couldn't set /chosen/bootargs\n");
+    }
+    cpu_physical_memory_write(addr, (void *)fdt, fdt_size);
+#else
+    /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
+       to the kernel.  */
+    fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
+    if (fdt_size < 0) {
+        path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+        if (path) {
+            fdt_size = load_image_targphys(path, addr, 0x10000);
+            qemu_free(path);
+        }
+    }
+
+    if (kernel_cmdline) {
+        fprintf(stderr,
+                "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
+    }
+#endif
+    return fdt_size;
+}
+
+static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
+{
+    return addr - 0x30000000LL;
+}
+
+#define MEMORY_BASEADDR 0x50000000
+#define FLASH_BASEADDR 0x86000000
+#define INTC_BASEADDR 0x81800000
+#define TIMER_BASEADDR 0x83c00000
+#define UART16550_BASEADDR 0x83e00000
+#define AXIENET_BASEADDR 0x82780000
+#define AXIDMA_BASEADDR 0x84600000
+
+static void
+petalogix_ml605_init(ram_addr_t ram_size,
+                          const char *boot_device,
+                          const char *kernel_filename,
+                          const char *kernel_cmdline,
+                          const char *initrd_filename, const char *cpu_model)
+{
+    DeviceState *dev;
+    CPUState *env;
+    int kernel_size;
+    DriveInfo *dinfo;
+    int i;
+    target_phys_addr_t ddr_base = MEMORY_BASEADDR;
+    ram_addr_t phys_lmb_bram;
+    ram_addr_t phys_ram;
+    ram_addr_t phys_flash;
+    qemu_irq irq[32], *cpu_irq;
+    void *serial = NULL;
+
+    /* init CPUs */
+    if (cpu_model == NULL) {
+        cpu_model = "microblaze";
+    }
+    env = cpu_init(cpu_model);
+
+    qemu_register_reset(main_cpu_reset, env);
+
+    /* Attach emulated BRAM through the LMB.  */
+    phys_lmb_bram = qemu_ram_alloc(NULL, "petalogix_ml605.lmb_bram",
+                                   LMB_BRAM_SIZE);
+    cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
+                                 phys_lmb_bram | IO_MEM_RAM);
+
+    phys_ram = qemu_ram_alloc(NULL, "petalogix_ml605.ram", ram_size);
+    cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM);
+
+    phys_flash = qemu_ram_alloc(NULL, "petalogix_ml605.flash", FLASH_SIZE);
+    dinfo = drive_get(IF_PFLASH, 0, 0);
+    /* 5th parameter 2 means bank-width
+     * 10th paremeter 0 means little-endian */
+    pflash_cfi01_register(FLASH_BASEADDR, phys_flash,
+                          dinfo ? dinfo->bdrv : NULL, (64 * 1024),
+                          FLASH_SIZE >> 16,
+                          2, 0x89, 0x18, 0x0000, 0x0, 0);
+
+
+    cpu_irq = microblaze_pic_init_cpu(env);
+    dev = xilinx_intc_create(INTC_BASEADDR, cpu_irq[0], 4);
+    for (i = 0; i < 32; i++) {
+        irq[i] = qdev_get_gpio_in(dev, i);
+    }
+
+    serial = serial_mm_init(UART16550_BASEADDR + 0x1000, 2, irq[5],
+                        115200, serial_hds[0], 1, 0);
+
+    /* 2 timers at irq 2 @ 100 Mhz.  */
+    xilinx_timer_create(TIMER_BASEADDR, irq[2], 2, 100 * 1000000);
+
+    /* axi ethernet and dma initialization. TODO: Dynamically connect them.  */
+    {
+        static struct XilinxDMAConnection dmach;
+
+        xilinx_axiethernet_create(&dmach, &nd_table[0], 0x82780000,
+                                  irq[3], 0x1000, 0x1000);
+        xilinx_axiethernetdma_create(&dmach, 0x84600000,
+                                     irq[1], irq[0], 100 * 1000000);
+    }
+
+    if (kernel_filename) {
+        uint64_t entry, low, high;
+        uint32_t base32;
+        int big_endian = 0;
+
+#ifdef TARGET_WORDS_BIGENDIAN
+        big_endian = 1;
+#endif
+
+        /* Boots a kernel elf binary.  */
+        kernel_size = load_elf(kernel_filename, NULL, NULL,
+                               &entry, &low, &high,
+                               big_endian, ELF_MACHINE, 0);
+        base32 = entry;
+        if (base32 == 0xc0000000) {
+            kernel_size = load_elf(kernel_filename, translate_kernel_address,
+                                   NULL, &entry, NULL, NULL,
+                                   big_endian, ELF_MACHINE, 0);
+        }
+        /* Always boot into physical ram.  */
+        boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
+
+        /* If it wasn't an ELF image, try an u-boot image.  */
+        if (kernel_size < 0) {
+            target_phys_addr_t uentry, loadaddr;
+
+            kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
+            boot_info.bootstrap_pc = uentry;
+            high = (loadaddr + kernel_size + 3) & ~3;
+        }
+
+        /* Not an ELF image nor an u-boot image, try a RAW image.  */
+        if (kernel_size < 0) {
+            kernel_size = load_image_targphys(kernel_filename, ddr_base,
+                                              ram_size);
+            boot_info.bootstrap_pc = ddr_base;
+            high = (ddr_base + kernel_size + 3) & ~3;
+        }
+
+        boot_info.cmdline = high + 4096;
+        if (kernel_cmdline && strlen(kernel_cmdline)) {
+            pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
+        }
+        /* Provide a device-tree.  */
+        boot_info.fdt = boot_info.cmdline + 4096;
+        petalogix_load_device_tree(boot_info.fdt, ram_size,
+                                   0, 0,
+                                   kernel_cmdline);
+    }
+}
+
+static QEMUMachine petalogix_ml605_machine = {
+    .name = "petalogix-ml605",
+    .desc = "PetaLogix linux refdesign for xilinx ml605 little endian",
+    .init = petalogix_ml605_init,
+    .is_default = 0
+};
+
+static void petalogix_ml605_machine_init(void)
+{
+    qemu_register_machine(&petalogix_ml605_machine);
+}
+
+machine_init(petalogix_ml605_machine_init);