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74xx: use r4 instead of r2 in lock_ram_in_cache and unlock_ram_in_cache 

The patch is following the commit 3924384060

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>
This commit is contained in:
Dave Liu 2008-10-23 21:59:35 +08:00 committed by Wolfgang Denk
parent d344293a5b
commit d685b74c64
1 changed files with 4 additions and 4 deletions
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8
cpu/74xx_7xx/start.S
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@ -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