This is needed in unlock_ram_in_cache() because it is called from C and will corrupt the small data area anchor that is kept in R2.
lock_ram_in_cache() is modified similarly as good coding practice, but is not called from C.
Signed-off-by: Nick Spence nick.spence@freescale.com --- cpu/mpc83xx/start.S | 9 +++++---- 1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/cpu/mpc83xx/start.S b/cpu/mpc83xx/start.S index 16ed494..75ad36c 100644 --- a/cpu/mpc83xx/start.S +++ b/cpu/mpc83xx/start.S @@ -1060,9 +1060,9 @@ lock_ram_in_cache: */ lis r3, (CFG_INIT_RAM_ADDR & ~31)@h ori r3, r3, (CFG_INIT_RAM_ADDR & ~31)@l - li r2, ((CFG_INIT_RAM_END & ~31) + \ + li r4, ((CFG_INIT_RAM_END & ~31) + \ (CFG_INIT_RAM_ADDR & 31) + 31) / 32 - mtctr r2 + mtctr r4 1: dcbz r0, r3 addi r3, r3, 32 @@ -1082,8 +1082,9 @@ unlock_ram_in_cache: /* invalidate the INIT_RAM section */ lis r3, (CFG_INIT_RAM_ADDR & ~31)@h ori r3, r3, (CFG_INIT_RAM_ADDR & ~31)@l - li r2,512 - mtctr r2 + li r4, ((CFG_INIT_RAM_END & ~31) + \ + (CFG_INIT_RAM_ADDR & 31) + 31) / 32 + mtctr r4 1: icbi r0, r3 dcbi r0, r3 addi r3, r3, 32