[PATCH]64-bit PMC yosemite support in 2.6

[Manish Lachwani <mlachwani@mvista.com>]

Hi Ralf

Attached patch implements 64-bit changes to PMC yosemite board. Please
review 

Thanks
Manish Lachwani

--- arch/mips/pmc-sierra/yosemite/prom.c.orig   2004-10-21
16:02:20.000000000 -0700
+++ arch/mips/pmc-sierra/yosemite/prom.c        2004-10-21 16:07:27.000000000
-0700
@@ -61,6 +61,53 @@
        prom_cpu0_exit(NULL);
 }
 
+#ifdef CONFIG_MIPS64
+unsigned long signext(unsigned long addr)
+{
+       addr &= 0xffffffff;
+       return (unsigned long)((int)addr);
+}
+
+void *get_arg(unsigned long args, int arc)
+{
+       unsigned long ul;
+       unsigned char *puc, uc;
+
+       args += (arc * 4);
+       ul = (unsigned long)signext(args);
+       puc = (unsigned char *)ul;
+
+       if (puc == 0)
+               return (void *)0;
+
+       /* Big Endian support only */
+       uc = *puc++;
+       ul = ((unsigned long)uc) << 24;
+
+       uc = *puc++;
+       ul |= (((unsigned long)uc) << 16);
+
+       uc = *puc++;
+       ul |= (((unsigned long)uc) << 8);
+
+       uc = *puc++;
+       ul |= ((unsigned long)uc);
+
+       ul = signext(ul);
+       return (void *)ul;
+}
+
+char *arg64(unsigned long addrin, int arg_index)
+{
+       unsigned long args;
+       char *p;
+       args = signext(addrin);
+
+       p = (char *)get_arg(args, arg_index);
+       return p;
+}
+#endif /* CONFIG_MIPS64 */
+
 /*
  * Halt the system
  */
@@ -123,9 +170,56 @@
 #endif /* CONFIG_MIPS32 */
 
 #ifdef CONFIG_MIPS64
+       char *ptr;
+       
+       printk("MIPS 64-bit support for PMC-Sierra Yosemite \n");
+       debug_vectors = (struct callvectors *)signext((unsigned long)cv);
+       arcs_cmdline[0] = '\0';
+       
+       for (i = 1; i < argc; i++) {
+               ptr = (char *)arg64((unsigned long)arg, i);
+               if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >=
+                       sizeof(arcs_cmdline))
+                               break;
 
-       /* Do nothing for the 64-bit for now. Just implement for the 32-bit */
+               strcat(arcs_cmdline, ptr);
+               strcat(arcs_cmdline, " ");
+       }
 
+       i = 0;
+       while (1) {
+               ptr = (char *)arg64((unsigned long)env, i);
+               if (! ptr)
+                       break;
+
+               /* Yosemite OCD base */
+               if (strncmp("yosemite_base", ptr, strlen("yosemite_base")) == 
0) {
+                       yosemite_base = simple_strtol(ptr + 
strlen("yosemite_base"),
+                                                       NULL, 16);
+                       
+                       if ((yosemite_base & 0xffffffff00000000) == 0)
+                               yosemite_base = 0xfffffffffb000000;
+
+                       printk("yosemite_base is set to 0x%016lx\n", 
yosemite_base);
+               }
+
+               /* Rm9000 CPU Clock */
+               if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) {
+                       cpu_clock = simple_strtol(ptr + strlen("cpuclock="),
+                                               NULL, 10);
+
+                       printk("cpu_clock set to %d\n", cpu_clock);
+               }
+
+               /* Yosemite memory size */
+               if (strncmp("memsize", *env, strlen("memsize")) == 0) {
+                       memory_size =
+                               simple_strtol(*env + strlen("memsize="), NULL,
+                                               4);
+               }
+
+               i++;
+       }
 #endif /* CONFIG_MIPS64 */
 
        mips_machgroup = MACH_GROUP_TITAN;