allow the use of old console code and update elf_object not to rely on EM_ALPHA value.

base/loader/elf_object.cc:
    EM_ALPHA value isn't official, so perhaps we shouldn't use it
dev/alpha_console.cc:
dev/alpha_console.hh:
    this change allows the use of old console code

--HG--
extra : convert_revision : cfacd64ae7fd2595158ca1a83ebcdb66ee7e119b

base/loader/elf_object.cc

@@ -74,7 +74,8 @@ ElfObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
     else {
         if (ehdr.e_ident[EI_CLASS] == ELFCLASS32)
             panic("32 bit ELF Binary, Not Supported");
-        printf("emachine = %x\n", ehdr.e_machine);
+        /* @todo this emachine value isn't offical yet.
+         *       so we probably shouldn't check it. */
 //        if (ehdr.e_machine != EM_ALPHA)
 //            panic("Non Alpha Binary, Not Supported");
 

dev/alpha_console.cc

@@ -122,7 +122,9 @@ AlphaConsole::read(MemReqPtr &req, uint8_t *data)
                     *(uint32_t*)data = alphaAccess->intrClockFrequency;
                     break;
                 default:
-                    panic("Unknown 32bit access, %#x\n", daddr);
+                    // Old console code read in everyting as a 32bit int
+                    *(uint32_t*)data = *(uint32_t*)(consoleData + daddr);
+
             }
             break;
         case sizeof(uint64_t):

dev/alpha_console.hh

@@ -73,7 +73,10 @@ class SimpleDisk;
 class AlphaConsole : public PioDevice
 {
   protected:
+    union {
         AlphaAccess *alphaAccess;
+    uint8_t *consoleData;
+    };
 
     /** the disk must be accessed from the console */
     SimpleDisk *disk;