[Qemu-devel] [5516] ETRAX-FS: Add support for passing kernel command lines

[Qemu-devel] [5516] ETRAX-FS: Add support for passing kernel command lines

[Edgar E. Iglesias]

Revision: 5516
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5516
Author:   edgar_igl
Date:     2008-10-22 19:58:32 +0000 (Wed, 22 Oct 2008)

Log Message:
-----------
ETRAX-FS: Add support for passing kernel command lines

Modified Paths:
--------------
    trunk/hw/etraxfs.c

Modified: trunk/hw/etraxfs.c
===================================================================
--- trunk/hw/etraxfs.c	2008-10-22 19:35:08 UTC (rev 5515)
+++ trunk/hw/etraxfs.c	2008-10-22 19:58:32 UTC (rev 5516)
@@ -119,11 +119,13 @@
     }
 
     if (kernel_filename) {
-        uint64_t entry;
+        uint64_t entry, high;
+        int kcmdline_len;
+
         /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
            devboard SDK.  */
         kernel_size = load_elf(kernel_filename, -0x80000000LL,
-                               &entry, NULL, NULL);
+                               &entry, NULL, &high);
         bootstrap_pc = entry;
         if (kernel_size < 0) {
             /* Takes a kimage from the axis devboard SDK.  */
@@ -132,6 +134,17 @@
             env->regs[9] = 0x40004000 + kernel_size;
         }
         env->regs[8] = 0x56902387; /* RAM init magic.  */
+
+        if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
+            if (kcmdline_len > 256) {
+                fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
+                exit(1);
+            }
+            pstrcpy_targphys(high, 256, kernel_cmdline);
+            /* Let the kernel know we are modifying the cmdline.  */
+            env->regs[10] = 0x87109563;
+            env->regs[11] = high;
+        }
     }
     env->pc = bootstrap_pc;