The patch is following the commit 392438406041415fe64ab8748ec5ab5ad01d1cf7
mpc86xx: use r4 instead of r2 in lock_ram_in_cache and unlock_ram_in_cache
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
also, the r2 is used as global data pointer.
Signed-off-by: Dave Liu daveliu@freescale.com --- cpu/74xx_7xx/start.S | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/cpu/74xx_7xx/start.S b/cpu/74xx_7xx/start.S index 07bbe01..b5484e3 100644 --- a/cpu/74xx_7xx/start.S +++ b/cpu/74xx_7xx/start.S @@ -857,9 +857,9 @@ lock_ram_in_cache: */ lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l - li r2, ((CONFIG_SYS_INIT_RAM_END & ~31) + \ + li r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \ (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32 - mtctr r2 + mtctr r4 1: dcbz r0, r3 addi r3, r3, 32 @@ -878,9 +878,9 @@ unlock_ram_in_cache: /* invalidate the INIT_RAM section */ lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l - li r2, ((CONFIG_SYS_INIT_RAM_END & ~31) + \ + li r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \ (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32 - mtctr r2 + mtctr r4 1: icbi r0, r3 addi r3, r3, 32 bdnz 1b