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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>
This commit is contained in:
Michal Simek 2013-05-02 12:28:31 +02:00
parent ef9cb4e19b
commit 4323cd48a1
1 changed files with 10 additions and 10 deletions
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20
arch/microblaze/kernel/head.S
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@ -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))