m68k/ColdFire system emulation.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2851 c046a42c-6fe2-441c-8c8c-71466251a162

Makefile.target

@@ -308,7 +308,7 @@ LIBOBJS+= op_helper.o helper.o
 endif
 
 ifeq ($(TARGET_BASE_ARCH), m68k)
-LIBOBJS+= helper.o
+LIBOBJS+= op_helper.o helper.o
 endif
 
 ifeq ($(TARGET_BASE_ARCH), alpha)
@@ -466,6 +466,9 @@ endif
 ifeq ($(TARGET_BASE_ARCH), sh4)
 VL_OBJS+= shix.o sh7750.o sh7750_regnames.o tc58128.o
 endif
+ifeq ($(TARGET_BASE_ARCH), m68k)
+VL_OBJS+= an5206.o mcf5206.o ptimer.o
+endif
 ifdef CONFIG_GDBSTUB
 VL_OBJS+=gdbstub.o 
 endif

configure

@@ -467,7 +467,7 @@ fi
 if test -z "$target_list" ; then
 # these targets are portable
     if [ "$softmmu" = "yes" ] ; then
-        target_list="i386-softmmu ppc-softmmu sparc-softmmu x86_64-softmmu mips-softmmu mipsel-softmmu mips64-softmmu mips64el-softmmu arm-softmmu ppc64-softmmu ppcemb-softmmu "
+        target_list="i386-softmmu ppc-softmmu sparc-softmmu x86_64-softmmu mips-softmmu mipsel-softmmu mips64-softmmu mips64el-softmmu arm-softmmu ppc64-softmmu ppcemb-softmmu m68k-softmmu"
     fi
 # the following are Linux specific
     if [ "$linux_user" = "yes" ] ; then

cpu-exec.c

@@ -196,7 +196,7 @@ static inline TranslationBlock *tb_find_fast(void)
     cs_base = 0;
     pc = env->PC;
 #elif defined(TARGET_M68K)
-    flags = env->fpcr & M68K_FPCR_PREC;
+    flags = (env->fpcr & M68K_FPCR_PREC) | (env->sr & SR_S);
     cs_base = 0;
     pc = env->pc;
 #elif defined(TARGET_SH4)
@@ -297,7 +297,7 @@ int cpu_exec(CPUState *env1)
             return EXCP_HALTED;
         }
     }
-#elif defined(TARGET_ALPHA)
+#elif defined(TARGET_ALPHA) || defined(TARGET_M68K)
     if (env1->halted) {
         if (env1->interrupt_request & CPU_INTERRUPT_HARD) {
             env1->halted = 0;
@@ -390,6 +390,8 @@ int cpu_exec(CPUState *env1)
 		    do_interrupt(env);
 #elif defined(TARGET_ALPHA)
                     do_interrupt(env);
+#elif defined(TARGET_M68K)
+                    do_interrupt(0);
 #endif
                 }
                 env->exception_index = -1;
@@ -542,6 +544,18 @@ int cpu_exec(CPUState *env1)
                     if (interrupt_request & CPU_INTERRUPT_HARD) {
                         do_interrupt(env);
                     }
+#elif defined(TARGET_M68K)
+                    if (interrupt_request & CPU_INTERRUPT_HARD
+                        && ((env->sr & SR_I) >> SR_I_SHIFT)
+                            < env->pending_level) {
+                        /* Real hardware gets the interrupt vector via an
+                           IACK cycle at this point.  Current emulated
+                           hardware doesn't rely on this, so we
+                           provide/save the vector when the interrupt is
+                           first signalled.  */
+                        env->exception_index = env->pending_vector;
+                        do_interrupt(1);
+                    }
 #endif
                    /* Don't use the cached interupt_request value,
                       do_interrupt may have updated the EXITTB flag. */

exec-all.h

@@ -584,6 +584,8 @@ static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
     is_user = ((env->sr & SR_MD) == 0);
 #elif defined (TARGET_ALPHA)
     is_user = ((env->ps >> 3) & 3);
+#elif defined (TARGET_M68K)
+    is_user = ((env->sr & SR_S) == 0);
 #else
 #error unimplemented CPU
 #endif

hw/an5206.c

@@ -0,0 +1,89 @@
+/* 
+ * Arnewsh 5206 ColdFire system emulation.
+ *
+ * Copyright (c) 2007 CodeSourcery.
+ *
+ * This code is licenced under the GPL
+ */
+
+#include "vl.h"
+
+#define KERNEL_LOAD_ADDR 0x10000
+#define AN5206_MBAR_ADDR 0x10000000
+#define AN5206_RAMBAR_ADDR 0x20000000
+
+/* Stub functions for hardware that doesn't exist.  */
+void pic_info(void)
+{
+}
+
+void irq_info(void)
+{
+}
+
+void DMA_run (void)
+{
+}
+
+/* Board init.  */
+
+static void an5206_init(int ram_size, int vga_ram_size, int boot_device,
+                     DisplayState *ds, const char **fd_filename, int snapshot,
+                     const char *kernel_filename, const char *kernel_cmdline,
+                     const char *initrd_filename, const char *cpu_model)
+{
+    CPUState *env;
+    int kernel_size;
+    uint64_t elf_entry;
+    target_ulong entry;
+
+    env = cpu_init();
+    if (!cpu_model)
+        cpu_model = "m5206";
+    cpu_m68k_set_model(env, cpu_model);
+
+    /* Initialize CPU registers.  */
+    env->vbr = 0;
+    /* TODO: allow changing MBAR and RAMBAR.  */
+    env->mbar = AN5206_MBAR_ADDR | 1;
+    env->rambar0 = AN5206_RAMBAR_ADDR | 1;
+
+    /* DRAM at address zero */
+    cpu_register_physical_memory(0, ram_size,
+        qemu_ram_alloc(ram_size) | IO_MEM_RAM);
+
+    /* Internal SRAM.  */
+    cpu_register_physical_memory(AN5206_RAMBAR_ADDR, 512,
+        qemu_ram_alloc(512) | IO_MEM_RAM);
+
+    mcf5206_init(AN5206_MBAR_ADDR, env);
+
+    /* Load kernel.  */
+    if (!kernel_filename) {
+        fprintf(stderr, "Kernel image must be specified\n");
+        exit(1);
+    }
+
+    kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
+    entry = elf_entry;
+    if (kernel_size < 0) {
+        kernel_size = load_uboot(kernel_filename, &entry, NULL);
+    }
+    if (kernel_size < 0) {
+        kernel_size = load_image(kernel_filename,
+                                 phys_ram_base + KERNEL_LOAD_ADDR);
+        entry = KERNEL_LOAD_ADDR;
+    }
+    if (kernel_size < 0) {
+        fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
+        exit(1);
+    }
+
+    env->pc = entry;
+}
+
+QEMUMachine an5206_machine = {
+    "an5206",
+    "Arnewsh 5206",
+    an5206_init,
+};