microblaze: Do not use r6 in head.S

r6 stores pointer to ramdisk and shouldn't
be used before it is passed to machine_early_init.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
index eef84de..fcc797f 100644 (file)
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -112,16 +112,16 @@ no_fdt_arg:
  * copy command line directly to cmd_line placed in data section.
  */
        beqid   r5, skip        /* Skip if NULL pointer */
-       or      r6, r0, r0              /* incremment */
+       or      r11, r0, r0             /* incremment */
        ori     r4, r0, cmd_line        /* load address of command line */
        tophys(r4,r4)                   /* convert to phys address */
        ori     r3, r0, COMMAND_LINE_SIZE - 1 /* number of loops */
 _copy_command_line:
        /* r2=r5+r6 - r5 contain pointer to command line */
-       lbu             r2, r5, r6
+       lbu     r2, r5, r11
        beqid   r2, skip                /* Skip if no data */
-       sb              r2, r4, r6              /* addr[r4+r6]= r2*/
-       addik   r6, r6, 1               /* increment counting */
+       sb      r2, r4, r11             /* addr[r4+r6]= r2 */
+       addik   r11, r11, 1             /* increment counting */
        bgtid   r3, _copy_command_line  /* loop for all entries       */
        addik   r3, r3, -1              /* decrement loop */
        addik   r5, r4, 0               /* add new space for command line */
@@ -131,13 +131,13 @@ skip:
 
 #ifdef NOT_COMPILE
 /* save bram context */
-       or      r6, r0, r0                              /* incremment */
+       or      r11, r0, r0                             /* incremment */
        ori     r4, r0, TOPHYS(_bram_load_start)        /* save bram context */
        ori     r3, r0, (LMB_SIZE - 4)
 _copy_bram:
-       lw      r7, r0, r6              /* r7 = r0 + r6 */
-       sw      r7, r4, r6              /* addr[r4 + r6] = r7*/
-       addik   r6, r6, 4               /* increment counting */
+       lw      r7, r0, r11             /* r7 = r0 + r6 */
+       sw      r7, r4, r11             /* addr[r4 + r6] = r7 */
+       addik   r11, r11, 4             /* increment counting */
        bgtid   r3, _copy_bram          /* loop for all entries */
        addik   r3, r3, -4              /* descrement loop */
 #endif
@@ -303,8 +303,8 @@ jump_over2:
         * the exception vectors, using a 4k real==virtual mapping.
         */
        /* Use temporary TLB_ID for LMB - clear this temporary mapping later */
-       ori     r6, r0, MICROBLAZE_LMB_TLB_ID
-       mts     rtlbx,r6
+       ori     r11, r0, MICROBLAZE_LMB_TLB_ID
+       mts     rtlbx,r11
 
        ori     r4,r0,(TLB_WR | TLB_EX)
        ori     r3,r0,(TLB_VALID | TLB_PAGESZ(PAGESZ_4K))