Initial support for SS-2 (Sun4c)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3870 c046a42c-6fe2-441c-8c8c-71466251a162

7 files changed, 438 insertions, 8 deletions

diff --git a/Makefile.target b/Makefile.target
index 8b76317ad8..629f09da9a 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -486,7 +486,7 @@ VL_OBJS+= cirrus_vga.o parallel.o ptimer.o
 else
 VL_OBJS+= sun4m.o tcx.o pcnet.o iommu.o m48t59.o slavio_intctl.o
 VL_OBJS+= slavio_timer.o slavio_serial.o slavio_misc.o fdc.o esp.o sparc32_dma.o
-VL_OBJS+= cs4231.o ptimer.o eccmemctl.o sbi.o
+VL_OBJS+= cs4231.o ptimer.o eccmemctl.o sbi.o sun4c_intctl.o
 endif
 endif
 ifeq ($(TARGET_BASE_ARCH), arm)
diff --git a/hw/boards.h b/hw/boards.h
index ed68336959..26a9c638d4 100644
--- a/hw/boards.h
+++ b/hw/boards.h
@@ -53,6 +53,7 @@ extern QEMUMachine r2d_machine;
 
 /* sun4m.c */
 extern QEMUMachine ss5_machine, ss10_machine, ss600mp_machine, ss20_machine;
+extern QEMUMachine ss2_machine;
 extern QEMUMachine ss1000_machine, ss2000_machine;
 
 /* sun4u.c */
diff --git a/hw/sun4c_intctl.c b/hw/sun4c_intctl.c
new file mode 100644
index 0000000000..52c82fbc19
--- /dev/null
+++ b/hw/sun4c_intctl.c
@@ -0,0 +1,223 @@
+/*
+ * QEMU Sparc Sun4c interrupt controller emulation
+ *
+ * Based on slavio_intctl, copyright (c) 2003-2005 Fabrice Bellard
+ *
+ * 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 "hw.h"
+#include "sun4m.h"
+#include "console.h"
+//#define DEBUG_IRQ_COUNT
+//#define DEBUG_IRQ
+
+#ifdef DEBUG_IRQ
+#define DPRINTF(fmt, args...) \
+do { printf("IRQ: " fmt , ##args); } while (0)
+#else
+#define DPRINTF(fmt, args...)
+#endif
+
+/*
+ * Registers of interrupt controller in sun4c.
+ *
+ */
+
+#define MAX_PILS 16
+
+typedef struct Sun4c_INTCTLState {
+#ifdef DEBUG_IRQ_COUNT
+    uint64_t irq_count;
+#endif
+    qemu_irq *cpu_irqs;
+    const uint32_t *intbit_to_level;
+    uint32_t pil_out;
+    uint8_t reg;
+    uint8_t pending;
+} Sun4c_INTCTLState;
+
+#define INTCTL_MAXADDR 0
+#define INTCTL_SIZE (INTCTL_MAXADDR + 1)
+
+static void sun4c_check_interrupts(void *opaque);
+
+static uint32_t sun4c_intctl_mem_readb(void *opaque, target_phys_addr_t addr)
+{
+    Sun4c_INTCTLState *s = opaque;
+    uint32_t ret;
+
+    ret = s->reg;
+    DPRINTF("read reg 0x" TARGET_FMT_plx " = %x\n", addr, ret);
+
+    return ret;
+}
+
+static void sun4c_intctl_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+    Sun4c_INTCTLState *s = opaque;
+
+    DPRINTF("write reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
+    val &= 0xbf;
+    s->reg = val;
+    sun4c_check_interrupts(s);
+}
+
+static CPUReadMemoryFunc *sun4c_intctl_mem_read[3] = {
+    sun4c_intctl_mem_readb,
+    sun4c_intctl_mem_readb,
+    sun4c_intctl_mem_readb,
+};
+
+static CPUWriteMemoryFunc *sun4c_intctl_mem_write[3] = {
+    sun4c_intctl_mem_writeb,
+    sun4c_intctl_mem_writeb,
+    sun4c_intctl_mem_writeb,
+};
+
+void sun4c_pic_info(void *opaque)
+{
+    Sun4c_INTCTLState *s = opaque;
+
+    term_printf("master: pending 0x%2.2x, enabled 0x%2.2x\n", s->pending, s->reg);
+}
+
+void sun4c_irq_info(void *opaque)
+{
+#ifndef DEBUG_IRQ_COUNT
+    term_printf("irq statistic code not compiled.\n");
+#else
+    Sun4c_INTCTLState *s = opaque;
+    int64_t count;
+
+    term_printf("IRQ statistics:\n");
+    count = s->irq_count[i];
+    if (count > 0)
+        term_printf("%2d: %" PRId64 "\n", i, count);
+#endif
+}
+
+static const uint32_t intbit_to_level[] = { 0, 1, 4, 6, 8, 10, 0, 14, };
+
+static void sun4c_check_interrupts(void *opaque)
+{
+    Sun4c_INTCTLState *s = opaque;
+    uint32_t pil_pending;
+    unsigned int i;
+
+    DPRINTF("pending %x disabled %x\n", pending, s->intregm_disabled);
+    pil_pending = 0;
+    if (s->pending && !(s->reg & 0x80000000)) {
+        for (i = 0; i < 8; i++) {
+            if (s->pending & (1 << i))
+                pil_pending |= 1 << intbit_to_level[i];
+        }
+    }
+
+    for (i = 0; i < MAX_PILS; i++) {
+        if (pil_pending & (1 << i)) {
+            if (!(s->pil_out & (1 << i)))
+                qemu_irq_raise(s->cpu_irqs[i]);
+        } else {
+            if (s->pil_out & (1 << i))
+                qemu_irq_lower(s->cpu_irqs[i]);
+        }
+    }
+    s->pil_out = pil_pending;
+}
+
+/*
+ * "irq" here is the bit number in the system interrupt register
+ */
+static void sun4c_set_irq(void *opaque, int irq, int level)
+{
+    Sun4c_INTCTLState *s = opaque;
+    uint32_t mask = 1 << irq;
+    uint32_t pil = intbit_to_level[irq];
+
+    DPRINTF("Set irq %d -> pil %d level %d\n", irq, pil,
+            level);
+    if (pil > 0) {
+        if (level) {
+#ifdef DEBUG_IRQ_COUNT
+            s->irq_count[pil]++;
+#endif
+            s->pending |= mask;
+        } else {
+            s->pending &= ~mask;
+        }
+        sun4c_check_interrupts(s);
+    }
+}
+
+static void sun4c_intctl_save(QEMUFile *f, void *opaque)
+{
+    Sun4c_INTCTLState *s = opaque;
+
+    qemu_put_8s(f, &s->reg);
+    qemu_put_8s(f, &s->pending);
+}
+
+static int sun4c_intctl_load(QEMUFile *f, void *opaque, int version_id)
+{
+    Sun4c_INTCTLState *s = opaque;
+
+    if (version_id != 1)
+        return -EINVAL;
+
+    qemu_get_8s(f, &s->reg);
+    qemu_get_8s(f, &s->pending);
+    sun4c_check_interrupts(s);
+
+    return 0;
+}
+
+static void sun4c_intctl_reset(void *opaque)
+{
+    Sun4c_INTCTLState *s = opaque;
+
+    s->reg = 1;
+    s->pending = 0;
+    sun4c_check_interrupts(s);
+}
+
+void *sun4c_intctl_init(target_phys_addr_t addr, qemu_irq **irq,
+                        qemu_irq *parent_irq)
+{
+    int sun4c_intctl_io_memory;
+    Sun4c_INTCTLState *s;
+
+    s = qemu_mallocz(sizeof(Sun4c_INTCTLState));
+    if (!s)
+        return NULL;
+
+    sun4c_intctl_io_memory = cpu_register_io_memory(0, sun4c_intctl_mem_read,
+                                                    sun4c_intctl_mem_write, s);
+    cpu_register_physical_memory(addr, INTCTL_SIZE, sun4c_intctl_io_memory);
+    s->cpu_irqs = parent_irq;
+
+    register_savevm("sun4c_intctl", addr, 1, sun4c_intctl_save,
+                    sun4c_intctl_load, s);
+
+    qemu_register_reset(sun4c_intctl_reset, s);
+    *irq = qemu_allocate_irqs(sun4c_set_irq, s, 8);
+
+    sun4c_intctl_reset(s);
+    return s;
+}
+
diff --git a/hw/sun4m.c b/hw/sun4m.c
index 4edd311da2..aadac3759e 100644
--- a/hw/sun4m.c
+++ b/hw/sun4m.c
@@ -1,5 +1,5 @@
 /*
- * QEMU Sun4m & Sun4d System Emulator
+ * QEMU Sun4m & Sun4d & Sun4c System Emulator
  *
  * Copyright (c) 2003-2005 Fabrice Bellard
  *
@@ -51,6 +51,13 @@
  * SPARCcenter 2000
  * SPARCserver 1000
  *
+ * Sun4c architecture was used in the following machines:
+ * SPARCstation 1/1+, SPARCserver 1/1+
+ * SPARCstation SLC
+ * SPARCstation IPC
+ * SPARCstation ELC
+ * SPARCstation IPX
+ *
  * See for example: http://www.sunhelp.org/faq/sunref1.html
  */
 
@@ -79,6 +86,7 @@ struct hwdef {
     target_phys_addr_t tcx_base, cs_base, power_base;
     target_phys_addr_t ecc_base;
     uint32_t ecc_version;
+    target_phys_addr_t sun4c_intctl_base, sun4c_counter_base;
     long vram_size, nvram_size;
     // IRQ numbers are not PIL ones, but master interrupt controller register
     // bit numbers
@@ -521,6 +529,142 @@ static void sun4m_hw_init(const struct hwdef *hwdef, int RAM_size,
         ecc_init(hwdef->ecc_base, hwdef->ecc_version);
 }
 
+static void sun4c_hw_init(const struct hwdef *hwdef, int RAM_size,
+                          const char *boot_device,
+                          DisplayState *ds, const char *kernel_filename,
+                          const char *kernel_cmdline,
+                          const char *initrd_filename, const char *cpu_model)
+{
+    CPUState *env;
+    unsigned int i;
+    void *iommu, *espdma, *ledma, *main_esp, *nvram;
+    qemu_irq *cpu_irqs, *slavio_irq, *espdma_irq, *ledma_irq;
+    qemu_irq *esp_reset, *le_reset;
+    unsigned long prom_offset, kernel_size;
+    int ret;
+    char buf[1024];
+    BlockDriverState *fd[MAX_FD];
+    int index;
+
+    /* init CPU */
+    if (!cpu_model)
+        cpu_model = hwdef->default_cpu_model;
+
+    env = cpu_init(cpu_model);
+    if (!env) {
+        fprintf(stderr, "Unable to find Sparc CPU definition\n");
+        exit(1);
+    }
+
+    cpu_sparc_set_id(env, 0);
+
+    qemu_register_reset(main_cpu_reset, env);
+    register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
+    cpu_irqs = qemu_allocate_irqs(cpu_set_irq, env, MAX_PILS);
+
+    /* allocate RAM */
+    if ((uint64_t)RAM_size > hwdef->max_mem) {
+        fprintf(stderr, "qemu: Too much memory for this machine: %d, maximum %d\n",
+                (unsigned int)RAM_size / (1024 * 1024),
+                (unsigned int)hwdef->max_mem / (1024 * 1024));
+        exit(1);
+    }
+    cpu_register_physical_memory(0, RAM_size, 0);
+
+    /* load boot prom */
+    prom_offset = RAM_size + hwdef->vram_size;
+    cpu_register_physical_memory(hwdef->slavio_base,
+                                 (PROM_SIZE_MAX + TARGET_PAGE_SIZE - 1) &
+                                 TARGET_PAGE_MASK,
+                                 prom_offset | IO_MEM_ROM);
+
+    if (bios_name == NULL)
+        bios_name = PROM_FILENAME;
+    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
+    ret = load_elf(buf, hwdef->slavio_base - PROM_VADDR, NULL, NULL, NULL);
+    if (ret < 0 || ret > PROM_SIZE_MAX)
+        ret = load_image(buf, phys_ram_base + prom_offset);
+    if (ret < 0 || ret > PROM_SIZE_MAX) {
+        fprintf(stderr, "qemu: could not load prom '%s'\n",
+                buf);
+        exit(1);
+    }
+    prom_offset += (ret + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK;
+
+    /* set up devices */
+    slavio_intctl = sun4c_intctl_init(hwdef->sun4c_intctl_base,
+                                      &slavio_irq, cpu_irqs);
+
+    iommu = iommu_init(hwdef->iommu_base, hwdef->iommu_version);
+
+    espdma = sparc32_dma_init(hwdef->dma_base, slavio_irq[hwdef->esp_irq],
+                              iommu, &espdma_irq, &esp_reset);
+
+    ledma = sparc32_dma_init(hwdef->dma_base + 16ULL,
+                             slavio_irq[hwdef->le_irq], iommu, &ledma_irq,
+                             &le_reset);
+
+    if (graphic_depth != 8 && graphic_depth != 24) {
+        fprintf(stderr, "qemu: Unsupported depth: %d\n", graphic_depth);
+        exit (1);
+    }
+    tcx_init(ds, hwdef->tcx_base, phys_ram_base + RAM_size, RAM_size,
+             hwdef->vram_size, graphic_width, graphic_height, graphic_depth);
+
+    if (nd_table[0].model == NULL
+        || strcmp(nd_table[0].model, "lance") == 0) {
+        lance_init(&nd_table[0], hwdef->le_base, ledma, *ledma_irq, le_reset);
+    } else if (strcmp(nd_table[0].model, "?") == 0) {
+        fprintf(stderr, "qemu: Supported NICs: lance\n");
+        exit (1);
+    } else {
+        fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
+        exit (1);
+    }
+
+    nvram = m48t59_init(slavio_irq[0], hwdef->nvram_base, 0,
+                        hwdef->nvram_size, 8);
+
+    slavio_serial_ms_kbd_init(hwdef->ms_kb_base, slavio_irq[hwdef->ms_kb_irq],
+                              nographic);
+    // Slavio TTYA (base+4, Linux ttyS0) is the first Qemu serial device
+    // Slavio TTYB (base+0, Linux ttyS1) is the second Qemu serial device
+    slavio_serial_init(hwdef->serial_base, slavio_irq[hwdef->ser_irq],
+                       serial_hds[1], serial_hds[0]);
+
+    if (hwdef->fd_base != (target_phys_addr_t)-1) {
+        /* there is zero or one floppy drive */
+        fd[1] = fd[0] = NULL;
+        index = drive_get_index(IF_FLOPPY, 0, 0);
+        if (index != -1)
+            fd[0] = drives_table[index].bdrv;
+
+        sun4m_fdctrl_init(slavio_irq[hwdef->fd_irq], hwdef->fd_base, fd);
+    }
+
+    if (drive_get_max_bus(IF_SCSI) > 0) {
+        fprintf(stderr, "qemu: too many SCSI bus\n");
+        exit(1);
+    }
+
+    main_esp = esp_init(hwdef->esp_base, espdma, *espdma_irq,
+                        esp_reset);
+
+    for (i = 0; i < ESP_MAX_DEVS; i++) {
+        index = drive_get_index(IF_SCSI, 0, i);
+        if (index == -1)
+            continue;
+        esp_scsi_attach(main_esp, drives_table[index].bdrv, i);
+    }
+
+    kernel_size = sun4m_load_kernel(kernel_filename, kernel_cmdline,
+                                    initrd_filename);
+
+    nvram_init(nvram, (uint8_t *)&nd_table[0].macaddr, kernel_cmdline,
+               boot_device, RAM_size, kernel_size, graphic_width,
+               graphic_height, graphic_depth, hwdef->machine_id, "Sun4c");
+}
+
 static const struct hwdef hwdefs[] = {
     /* SS-5 */
     {
@@ -540,6 +684,8 @@ static const struct hwdef hwdefs[] = {
         .le_base      = 0x78c00000,
         .power_base   = 0x7a000000,
         .ecc_base     = -1,
+        .sun4c_intctl_base  = -1,
+        .sun4c_counter_base = -1,
         .vram_size    = 0x00100000,
         .nvram_size   = 0x2000,
         .esp_irq = 18,
@@ -579,6 +725,8 @@ static const struct hwdef hwdefs[] = {
         .power_base   = 0xefa000000ULL,
         .ecc_base     = 0xf00000000ULL,
         .ecc_version  = 0x10000000, // version 0, implementation 1
+        .sun4c_intctl_base  = -1,
+        .sun4c_counter_base = -1,
         .vram_size    = 0x00100000,
         .nvram_size   = 0x2000,
         .esp_irq = 18,
@@ -618,6 +766,8 @@ static const struct hwdef hwdefs[] = {
         .power_base   = 0xefa000000ULL,
         .ecc_base     = 0xf00000000ULL,
         .ecc_version  = 0x00000000, // version 0, implementation 0
+        .sun4c_intctl_base  = -1,
+        .sun4c_counter_base = -1,
         .vram_size    = 0x00100000,
         .nvram_size   = 0x2000,
         .esp_irq = 18,
@@ -657,6 +807,8 @@ static const struct hwdef hwdefs[] = {
         .power_base   = 0xefa000000ULL,
         .ecc_base     = 0xf00000000ULL,
         .ecc_version  = 0x20000000, // version 0, implementation 2
+        .sun4c_intctl_base  = -1,
+        .sun4c_counter_base = -1,
         .vram_size    = 0x00100000,
         .nvram_size   = 0x2000,
         .esp_irq = 18,
@@ -677,6 +829,39 @@ static const struct hwdef hwdefs[] = {
         .max_mem = 0xffffffff, // XXX actually first 62GB ok
         .default_cpu_model = "TI SuperSparc II",
     },
+    /* SS-2 */
+    {
+        .iommu_base   = 0xf8000000,
+        .tcx_base     = 0xfe000000,
+        .cs_base      = -1,
+        .slavio_base  = 0xf6000000,
+        .ms_kb_base   = 0xf0000000,
+        .serial_base  = 0xf1000000,
+        .nvram_base   = 0xf2000000,
+        .fd_base      = 0xf7200000,
+        .counter_base = -1,
+        .intctl_base  = -1,
+        .dma_base     = 0xf8400000,
+        .esp_base     = 0xf8800000,
+        .le_base      = 0xf8c00000,
+        .power_base   = -1,
+        .sun4c_intctl_base  = 0xf5000000,
+        .sun4c_counter_base = 0xf3000000,
+        .vram_size    = 0x00100000,
+        .nvram_size   = 0x2000, // XXX 0x800,
+        .esp_irq = 2,
+        .le_irq = 3,
+        .clock_irq = 5,
+        .clock1_irq = 7,
+        .ms_kb_irq = 1,
+        .ser_irq = 1,
+        .fd_irq = 1,
+        .me_irq = 1,
+        .cs_irq = -1,
+        .machine_id = 0x55,
+        .max_mem = 0x10000000,
+        .default_cpu_model = "Cypress CY7C601",
+    },
 };
 
 /* SPARCstation 5 hardware initialisation */
@@ -719,6 +904,16 @@ static void ss20_init(int RAM_size, int vga_ram_size,
                   kernel_cmdline, initrd_filename, cpu_model);
 }
 
+/* SPARCstation 2 hardware initialisation */
+static void ss2_init(int RAM_size, int vga_ram_size,
+                     const char *boot_device, DisplayState *ds,
+                     const char *kernel_filename, const char *kernel_cmdline,
+                     const char *initrd_filename, const char *cpu_model)
+{
+    sun4c_hw_init(&hwdefs[4], RAM_size, boot_device, ds, kernel_filename,
+                  kernel_cmdline, initrd_filename, cpu_model);
+}
+
 QEMUMachine ss5_machine = {
     "SS-5",
     "Sun4m platform, SPARCstation 5",
@@ -743,6 +938,11 @@ QEMUMachine ss20_machine = {
     ss20_init,
 };
 
+QEMUMachine ss2_machine = {
+    "SS-2",
+    "Sun4c platform, SPARCstation 2",
+    ss2_init,
+};
 
 static const struct sun4d_hwdef sun4d_hwdefs[] = {
     /* SS-1000 */
diff --git a/hw/sun4m.h b/hw/sun4m.h
index df263eaf3f..79bd4bfa23 100644
--- a/hw/sun4m.h
+++ b/hw/sun4m.h
@@ -38,6 +38,10 @@ void slavio_irq_info(void *opaque);
 void *sbi_init(target_phys_addr_t addr, qemu_irq **irq, qemu_irq **cpu_irq,
                qemu_irq **parent_irq);
 
+/* sun4c_intctl.c */
+void *sun4c_intctl_init(target_phys_addr_t addr, qemu_irq **irq,
+                        qemu_irq *parent_irq);
+
 /* slavio_timer.c */
 void slavio_timer_init_all(target_phys_addr_t base, qemu_irq master_irq,
                            qemu_irq *cpu_irqs, unsigned int num_cpus);
diff --git a/qemu-doc.texi b/qemu-doc.texi
index e7de184487..9b56f99fcc 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -74,7 +74,7 @@ For system emulation, the following hardware targets are supported:
 @item PREP (PowerPC processor)
 @item G3 BW PowerMac (PowerPC processor)
 @item Mac99 PowerMac (PowerPC processor, in progress)
-@item Sun4m/Sun4d (32-bit Sparc processor)
+@item Sun4m/Sun4c/Sun4d (32-bit Sparc processor)
 @item Sun4u (64-bit Sparc processor, in progress)
 @item Malta board (32-bit and 64-bit MIPS processors)
 @item ARM Integrator/CP (ARM)
@@ -2026,10 +2026,11 @@ More information is available at
 @section Sparc32 System emulator
 
 Use the executable @file{qemu-system-sparc} to simulate a SPARCstation
-5, SPARCstation 10, SPARCstation 20, SPARCserver 600MP (sun4m architecture),
-SPARCserver 1000, or SPARCcenter 2000 (sun4d architecture). The
-emulation is somewhat complete.  SMP up to 16 CPUs is supported, but
-Linux limits the number of usable CPUs to 4.
+5, SPARCstation 10, SPARCstation 20, SPARCserver 600MP (sun4m
+architecture), SPARCstation 2 (sun4c architecture), SPARCserver 1000,
+or SPARCcenter 2000 (sun4d architecture). The emulation is somewhat
+complete.  SMP up to 16 CPUs is supported, but Linux limits the number
+of usable CPUs to 4.
 
 QEMU emulates the following sun4m/sun4d peripherals:
 
@@ -2086,7 +2087,7 @@ qemu-system-sparc -prom-env 'auto-boot?=false' \
  -prom-env 'boot-device=sd(0,2,0):d' -prom-env 'boot-args=linux single'
 @end example
 
-@item -M [SS-5|SS-10|SS-20|SS-600MP|SS-1000|SS-2000]
+@item -M [SS-5|SS-10|SS-20|SS-600MP|SS-2|SS-1000|SS-2000]
 
 Set the emulated machine type. Default is SS-5.
 
diff --git a/vl.c b/vl.c
index 15433302a2..129166dd27 100644
--- a/vl.c
+++ b/vl.c
@@ -7892,6 +7892,7 @@ static void register_machines(void)
     qemu_register_machine(&ss10_machine);
     qemu_register_machine(&ss600mp_machine);
     qemu_register_machine(&ss20_machine);
+    qemu_register_machine(&ss2_machine);
     qemu_register_machine(&ss1000_machine);
     qemu_register_machine(&ss2000_machine);
 #endif