Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 350 insertions, 0 deletions

diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
new file mode 100644
index 000000000..c1b8066a1
--- /dev/null
+++ b/hw/mips/fuloong2e.c
@@ -0,0 +1,350 @@
+/*
+ * QEMU fuloong 2e mini pc support
+ *
+ * Copyright (c) 2008 yajin (yajin@vm-kernel.org)
+ * Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn)
+ * Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com)
+ * This code is licensed under the GNU GPL v2.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+/*
+ * Fuloong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
+ * https://www.linux-mips.org/wiki/Fuloong_2E
+ *
+ * Loongson 2e manuals:
+ * https://github.com/loongson-community/docs/tree/master/2E
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qemu/datadir.h"
+#include "qemu/units.h"
+#include "qapi/error.h"
+#include "cpu.h"
+#include "hw/clock.h"
+#include "net/net.h"
+#include "hw/boards.h"
+#include "hw/i2c/smbus_eeprom.h"
+#include "hw/block/flash.h"
+#include "hw/mips/mips.h"
+#include "hw/mips/bootloader.h"
+#include "hw/mips/cpudevs.h"
+#include "hw/pci/pci.h"
+#include "hw/loader.h"
+#include "hw/ide/pci.h"
+#include "hw/qdev-properties.h"
+#include "elf.h"
+#include "hw/isa/vt82c686.h"
+#include "sysemu/qtest.h"
+#include "sysemu/reset.h"
+#include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
+
+#define ENVP_PADDR              0x2000
+#define ENVP_VADDR              cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
+#define ENVP_NB_ENTRIES         16
+#define ENVP_ENTRY_SIZE         256
+
+/* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
+#define BIOS_SIZE               (512 * KiB)
+#define MAX_IDE_BUS             2
+
+/*
+ * PMON is not part of qemu and released with BSD license, anyone
+ * who want to build a pmon binary please first git-clone the source
+ * from the git repository at:
+ * https://github.com/loongson-community/pmon
+ */
+#define FULOONG_BIOSNAME "pmon_2e.bin"
+
+/* PCI SLOT in Fuloong 2e */
+#define FULOONG2E_VIA_SLOT        5
+#define FULOONG2E_ATI_SLOT        6
+#define FULOONG2E_RTL8139_SLOT    7
+
+static struct _loaderparams {
+    int ram_size;
+    const char *kernel_filename;
+    const char *kernel_cmdline;
+    const char *initrd_filename;
+} loaderparams;
+
+static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index,
+                                        const char *string, ...)
+{
+    va_list ap;
+    int32_t table_addr;
+
+    if (index >= ENVP_NB_ENTRIES) {
+        return;
+    }
+
+    if (string == NULL) {
+        prom_buf[index] = 0;
+        return;
+    }
+
+    table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
+    prom_buf[index] = tswap32(ENVP_VADDR + table_addr);
+
+    va_start(ap, string);
+    vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
+    va_end(ap);
+}
+
+static uint64_t load_kernel(MIPSCPU *cpu)
+{
+    uint64_t kernel_entry, kernel_high, initrd_size;
+    int index = 0;
+    long kernel_size;
+    ram_addr_t initrd_offset;
+    uint32_t *prom_buf;
+    long prom_size;
+
+    kernel_size = load_elf(loaderparams.kernel_filename, NULL,
+                           cpu_mips_kseg0_to_phys, NULL,
+                           &kernel_entry, NULL,
+                           &kernel_high, NULL,
+                           0, EM_MIPS, 1, 0);
+    if (kernel_size < 0) {
+        error_report("could not load kernel '%s': %s",
+                     loaderparams.kernel_filename,
+                     load_elf_strerror(kernel_size));
+        exit(1);
+    }
+
+    /* load initrd */
+    initrd_size = 0;
+    initrd_offset = 0;
+    if (loaderparams.initrd_filename) {
+        initrd_size = get_image_size(loaderparams.initrd_filename);
+        if (initrd_size > 0) {
+            initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
+            if (initrd_offset + initrd_size > loaderparams.ram_size) {
+                error_report("memory too small for initial ram disk '%s'",
+                             loaderparams.initrd_filename);
+                exit(1);
+            }
+            initrd_size = load_image_targphys(loaderparams.initrd_filename,
+                                              initrd_offset,
+                                              loaderparams.ram_size - initrd_offset);
+        }
+        if (initrd_size == (target_ulong) -1) {
+            error_report("could not load initial ram disk '%s'",
+                         loaderparams.initrd_filename);
+            exit(1);
+        }
+    }
+
+    /* Setup prom parameters. */
+    prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
+    prom_buf = g_malloc(prom_size);
+
+    prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
+    if (initrd_size > 0) {
+        prom_set(prom_buf, index++,
+                 "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
+                 cpu_mips_phys_to_kseg0(NULL, initrd_offset),
+                 initrd_size, loaderparams.kernel_cmdline);
+    } else {
+        prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
+    }
+
+    /* Setup minimum environment variables */
+    prom_set(prom_buf, index++, "busclock=33000000");
+    prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock));
+    prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
+    prom_set(prom_buf, index++, NULL);
+
+    rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
+
+    g_free(prom_buf);
+    return kernel_entry;
+}
+
+static void write_bootloader(CPUMIPSState *env, uint8_t *base,
+                             uint64_t kernel_addr)
+{
+    uint32_t *p;
+
+    /* Small bootloader */
+    p = (uint32_t *)base;
+
+    /* j 0x1fc00040 */
+    stl_p(p++, 0x0bf00010);
+    /* nop */
+    stl_p(p++, 0x00000000);
+
+    /* Second part of the bootloader */
+    p = (uint32_t *)(base + 0x040);
+
+    bl_gen_jump_kernel(&p, ENVP_VADDR - 64, 2, ENVP_VADDR, ENVP_VADDR + 8,
+                       loaderparams.ram_size, kernel_addr);
+}
+
+static void main_cpu_reset(void *opaque)
+{
+    MIPSCPU *cpu = opaque;
+    CPUMIPSState *env = &cpu->env;
+
+    cpu_reset(CPU(cpu));
+    /* TODO: 2E reset stuff */
+    if (loaderparams.kernel_filename) {
+        env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
+    }
+}
+
+static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
+                                       I2CBus **i2c_bus)
+{
+    PCIDevice *dev;
+
+    dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(slot, 0), true,
+                                          TYPE_VT82C686B_ISA);
+    qdev_connect_gpio_out(DEVICE(dev), 0, intc);
+
+    dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide");
+    pci_ide_create_devs(dev);
+
+    pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
+    pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
+
+    dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 4), TYPE_VT82C686B_PM);
+    *i2c_bus = I2C_BUS(qdev_get_child_bus(DEVICE(dev), "i2c"));
+
+    /* Audio support */
+    pci_create_simple(pci_bus, PCI_DEVFN(slot, 5), TYPE_VIA_AC97);
+    pci_create_simple(pci_bus, PCI_DEVFN(slot, 6), TYPE_VIA_MC97);
+}
+
+/* Network support */
+static void network_init(PCIBus *pci_bus)
+{
+    int i;
+
+    for (i = 0; i < nb_nics; i++) {
+        NICInfo *nd = &nd_table[i];
+        const char *default_devaddr = NULL;
+
+        if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
+            /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
+            default_devaddr = "07";
+        }
+
+        pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
+    }
+}
+
+static void mips_fuloong2e_init(MachineState *machine)
+{
+    const char *kernel_filename = machine->kernel_filename;
+    const char *kernel_cmdline = machine->kernel_cmdline;
+    const char *initrd_filename = machine->initrd_filename;
+    char *filename;
+    MemoryRegion *address_space_mem = get_system_memory();
+    MemoryRegion *bios = g_new(MemoryRegion, 1);
+    long bios_size;
+    uint8_t *spd_data;
+    uint64_t kernel_entry;
+    PCIDevice *pci_dev;
+    PCIBus *pci_bus;
+    I2CBus *smbus;
+    Clock *cpuclk;
+    MIPSCPU *cpu;
+    CPUMIPSState *env;
+    DeviceState *dev;
+
+    cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
+    clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
+
+    /* init CPUs */
+    cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
+    env = &cpu->env;
+
+    qemu_register_reset(main_cpu_reset, cpu);
+
+    /* TODO: support more than 256M RAM as highmem */
+    if (machine->ram_size != 256 * MiB) {
+        error_report("Invalid RAM size, should be 256MB");
+        exit(EXIT_FAILURE);
+    }
+    memory_region_add_subregion(address_space_mem, 0, machine->ram);
+
+    /* Boot ROM */
+    memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
+                           &error_fatal);
+    memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
+
+    /*
+     * We do not support flash operation, just loading pmon.bin as raw BIOS.
+     * Please use -L to set the BIOS path and -bios to set bios name.
+     */
+
+    if (kernel_filename) {
+        loaderparams.ram_size = machine->ram_size;
+        loaderparams.kernel_filename = kernel_filename;
+        loaderparams.kernel_cmdline = kernel_cmdline;
+        loaderparams.initrd_filename = initrd_filename;
+        kernel_entry = load_kernel(cpu);
+        write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
+    } else {
+        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
+                                  machine->firmware ?: FULOONG_BIOSNAME);
+        if (filename) {
+            bios_size = load_image_targphys(filename, 0x1fc00000LL,
+                                            BIOS_SIZE);
+            g_free(filename);
+        } else {
+            bios_size = -1;
+        }
+
+        if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
+            machine->firmware && !qtest_enabled()) {
+            error_report("Could not load MIPS bios '%s'", machine->firmware);
+            exit(1);
+        }
+    }
+
+    /* Init internal devices */
+    cpu_mips_irq_init_cpu(cpu);
+    cpu_mips_clock_init(cpu);
+
+    /* North bridge, Bonito --> IP2 */
+    pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
+
+    /* South bridge -> IP5 */
+    vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5],
+                               &smbus);
+
+    /* GPU */
+    if (vga_interface_type != VGA_NONE) {
+        pci_dev = pci_new(-1, "ati-vga");
+        dev = DEVICE(pci_dev);
+        qdev_prop_set_uint32(dev, "vgamem_mb", 16);
+        qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
+        pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
+    }
+
+    /* Populate SPD eeprom data */
+    spd_data = spd_data_generate(DDR, machine->ram_size);
+    smbus_eeprom_init_one(smbus, 0x50, spd_data);
+
+    /* Network card: RTL8139D */
+    network_init(pci_bus);
+}
+
+static void mips_fuloong2e_machine_init(MachineClass *mc)
+{
+    mc->desc = "Fuloong 2e mini pc";
+    mc->init = mips_fuloong2e_init;
+    mc->block_default_type = IF_IDE;
+    mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
+    mc->default_ram_size = 256 * MiB;
+    mc->default_ram_id = "fuloong2e.ram";
+    mc->minimum_page_bits = 14;
+}
+
+DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)