powerpc/mpc8xx: Zero boot_flags arg for calling board_init_f()

Copied from e83a7e94532 ("powerpc/mpc83xx: Zero boot_flags arg for
calling board_init_f()")

The argument boot_flags of board_init_f() is not used at all in the
powerpc specific board.c init sequence. Now with the generic init
sequence, this boot_flags arg is used by board_init_f().

This patch sets the r3 register that is used to pass the boot_flags
argument from the start.S board_init_f() call to 0 prior to the function
call to avoid unknown content to end up in gd->flags.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Fixes: 09f3ca3dd53 ("arm, powerpc: select SYS_GENERIC_BOARD")

diff --git a/arch/powerpc/cpu/mpc8xx/start.S b/arch/powerpc/cpu/mpc8xx/start.S
index 1f1107e61d5f73185f380669b762caf6e54ac639..0aa73fca12530260cb2965d9501cb41f720a7d99 100644 (file)
--- a/arch/powerpc/cpu/mpc8xx/start.S
+++ b/arch/powerpc/cpu/mpc8xx/start.S
@@ -171,6 +171,7 @@ in_flash:
        lis     r3, CONFIG_SYS_IMMR@h
        bl      cpu_init_f      /* run low-level CPU init code     (from Flash) */
 
+       li      r3, 0           /* clear boot_flag for calling board_init_f */
        bl      board_init_f    /* run 1st part of board init code (from Flash) */
 
        /* NOTREACHED - board_init_f() does not return */