microblaze: Add petalogix s3a1800dsp MMU linux ref-design.

This setup was designed by petalogix and is supported by upstream linux.
The design targets a xilinx spartan-3a-1800 dsp board with MMU.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>

3 files changed, 245 insertions, 0 deletions

diff --git a/hw/petalogix_s3adsp1800_mmu.c b/hw/petalogix_s3adsp1800_mmu.c
new file mode 100644
index 0000000..b317515
--- /dev/null
+++ b/hw/petalogix_s3adsp1800_mmu.c
@@ -0,0 +1,184 @@
+/*
+ * Model of Petalogix linux reference design targeting Xilinx Spartan 3ADSP-1800
+ * boards.
+ *
+ * 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"
+
+#define LMB_BRAM_SIZE  (128 * 1024)
+#define FLASH_SIZE     (16 * 1024 * 1024)
+
+static uint32_t bootstrap_pc;
+
+static void main_cpu_reset(void *opaque)
+{
+    CPUState *env = opaque;
+    cpu_reset(env);
+    env->sregs[SR_PC] = bootstrap_pc;
+}
+
+#define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.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)
+{
+    void *fdt;
+    char *path = NULL;
+    int fdt_size;
+    int pathlen;
+    int r;
+
+    /* Try the local "mb.dtb" override.  */
+    fdt = load_device_tree("mb.dtb", &fdt_size);
+    if (!fdt) {
+        pathlen = snprintf(NULL, 0, "%s/%s",
+                           bios_dir, BINARY_DEVICE_TREE_FILE) + 1;
+        path = qemu_malloc(pathlen);
+        snprintf(path, pathlen, "%s/%s", bios_dir, BINARY_DEVICE_TREE_FILE);
+        fdt = load_device_tree(BINARY_DEVICE_TREE_FILE, &fdt_size);
+        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");
+    printf("write fdt to addr=%x fdtsize=%d\n", addr, fdt_size);
+    cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
+    return fdt_size;
+}
+
+static void
+petalogix_s3adsp1800_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;
+    int i;
+    target_phys_addr_t ddr_base = 0x90000000;
+    ram_addr_t phys_lmb_bram;
+    ram_addr_t phys_ram;
+    ram_addr_t phys_flash;
+    qemu_irq irq[32], *cpu_irq;
+
+    /* init CPUs */
+    if (cpu_model == NULL) {
+        cpu_model = "microblaze";
+    }
+    env = cpu_init(cpu_model);
+
+    env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
+    qemu_register_reset(main_cpu_reset, 0, env);
+
+    /* Attach emulated BRAM through the LMB.  */
+    phys_lmb_bram = qemu_ram_alloc(LMB_BRAM_SIZE);
+    cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
+                                 phys_lmb_bram | IO_MEM_RAM);
+
+    phys_ram = qemu_ram_alloc(ram_size);
+    cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM);
+
+    phys_flash = qemu_ram_alloc(FLASH_SIZE);
+    i = drive_get_index(IF_PFLASH, 0, 0);
+    pflash_cfi02_register(0xa0000000, phys_flash,
+                          i != -1 ? drives_table[i].bdrv : NULL, (64 * 1024),
+                          FLASH_SIZE >> 16,
+                          1, 1, 0x0000, 0x0000, 0x0000, 0x0000,
+                          0x555, 0x2aa);
+
+    cpu_irq = microblaze_pic_init_cpu(env);
+    dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2);
+    for (i = 0; i < 32; i++) {
+        irq[i] = qdev_get_gpio_in(dev, i);
+    }
+
+    sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]);
+    /* 2 timers at irq 2 @ 62 Mhz.  */
+    xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
+    xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
+
+    if (kernel_filename) {
+        uint64_t entry, low, high;
+        int kcmdline_len;
+        uint32_t base32;
+
+        /* Boots a kernel elf binary.  */
+        kernel_size = load_elf(kernel_filename, 0,
+                               &entry, &low, &high);
+        base32 = entry;
+        if (base32 == 0xc0000000) {
+            kernel_size = load_elf(kernel_filename, -0x30000000LL,
+                                   &entry, NULL, NULL);
+        }
+        /* Always boot into physical ram.  */
+        bootstrap_pc = ddr_base + (entry & 0x0fffffff);
+        if (kernel_size < 0) {
+            /* If we failed loading ELF's try a raw image.  */
+            kernel_size = load_image_targphys(kernel_filename, ddr_base,
+                                              ram_size);
+            bootstrap_pc = ddr_base;
+        }
+
+        env->regs[5] = ddr_base + kernel_size;
+        if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
+            pstrcpy_targphys(env->regs[5], 256, kernel_cmdline);
+        }
+        env->regs[6] = 0;
+        /* Provide a device-tree.  */
+        env->regs[7] = ddr_base + kernel_size + 256;
+        petalogix_load_device_tree(env->regs[7], ram_size,
+                                   env->regs[6], 0,
+                                   kernel_cmdline);
+    }
+
+    env->sregs[SR_PC] = bootstrap_pc;
+}
+
+static QEMUMachine petalogix_s3adsp1800_machine = {
+    .name = "petalogix-s3adsp1800",
+    .desc = "Petalogix linux refdesign for xilinx Spartan 3ADSP1800",
+    .init = petalogix_s3adsp1800_init,
+    .is_default = 1
+};
+
+static void petalogix_s3adsp1800_machine_init(void)
+{
+    qemu_register_machine(&petalogix_s3adsp1800_machine);
+}
+
+machine_init(petalogix_s3adsp1800_machine_init);
diff --git a/hw/xilinx.h b/hw/xilinx.h
new file mode 100644
index 0000000..9707a0e
--- /dev/null
+++ b/hw/xilinx.h
@@ -0,0 +1,50 @@
+
+/* OPB Interrupt Controller.  */
+qemu_irq *microblaze_pic_init_cpu(CPUState *env);
+
+static inline DeviceState *
+xilinx_intc_create(target_phys_addr_t base, qemu_irq irq, int kind_of_intr)
+{
+    DeviceState *dev;
+
+    dev = qdev_create(NULL, "xilinx,intc");
+    qdev_set_prop_int(dev, "kind-of-intr", kind_of_intr);
+    qdev_init(dev);
+    sysbus_mmio_map(sysbus_from_qdev(dev), 0, base);
+    sysbus_connect_irq(sysbus_from_qdev(dev), 0, irq);
+    return dev;
+}
+
+/* OPB Timer/Counter.  */
+static inline DeviceState *
+xilinx_timer_create(target_phys_addr_t base, qemu_irq irq, int nr, int freq)
+{
+    DeviceState *dev;
+
+    dev = qdev_create(NULL, "xilinx,timer");
+    qdev_set_prop_int(dev, "nr-timers", nr);
+    qdev_set_prop_int(dev, "frequency", freq);
+    qdev_init(dev);
+    sysbus_mmio_map(sysbus_from_qdev(dev), 0, base);
+    sysbus_connect_irq(sysbus_from_qdev(dev), 0, irq);
+    return dev;
+}
+
+/* XPS Ethernet Lite MAC.  */
+static inline DeviceState *
+xilinx_ethlite_create(NICInfo *nd, target_phys_addr_t base, qemu_irq irq,
+                      int txpingpong, int rxpingpong)
+{
+    DeviceState *dev;
+
+    qemu_check_nic_model(nd, "xilinx-ethlite");
+
+    dev = qdev_create(NULL, "xilinx,ethlite");
+    qdev_set_netdev(dev, nd);
+    qdev_set_prop_int(dev, "txpingpong", txpingpong);
+    qdev_set_prop_int(dev, "rxpingpong", rxpingpong);
+    qdev_init(dev);
+    sysbus_mmio_map(sysbus_from_qdev(dev), 0, base);
+    sysbus_connect_irq(sysbus_from_qdev(dev), 0, irq);
+    return dev;
+}
diff --git a/target-microblaze/machine.c b/target-microblaze/machine.c
new file mode 100644
index 0000000..1be1c35
--- /dev/null
+++ b/target-microblaze/machine.c
@@ -0,0 +1,11 @@
+#include "hw/hw.h"
+#include "hw/boards.h"
+
+void cpu_save(QEMUFile *f, void *opaque)
+{
+}
+
+int cpu_load(QEMUFile *f, void *opaque, int version_id)
+{
+    return 0;
+}