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powerpc/mpc85xx:Disable non DDR LAWs before init_law

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Before parsing LAW table i.e. init_law, boot loader should disable all
previous LAWs except DDR LAWs which has been created by previous
pre boot loader during DDR initialization.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Prabhakar Kushwaha 2014-04-08 19:12:46 +05:30 • committed by York Sun
parent 651fcf6019
commit 6b3d588efe
1 changed files with 33 additions and 9 deletions
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42
arch/powerpc/cpu/mpc8xxx/law.c
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@ -221,6 +221,32 @@ int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
}
#endif /* not SPL */
void disable_non_ddr_laws(void)
{
int i;
int id;
for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
u32 lawar = in_be32(LAWAR_ADDR(i));
if (lawar & LAW_EN) {
id = (lawar & ~LAW_EN) >> 20;
switch (id) {
case LAW_TRGT_IF_DDR_1:
case LAW_TRGT_IF_DDR_2:
case LAW_TRGT_IF_DDR_3:
case LAW_TRGT_IF_DDR_4:
case LAW_TRGT_IF_DDR_INTRLV:
case LAW_TRGT_IF_DDR_INTLV_34:
case LAW_TRGT_IF_DDR_INTLV_123:
case LAW_TRGT_IF_DDR_INTLV_1234:
continue;
default:
disable_law(i);
}
}
}
}
void init_laws(void)
{
int i;
@ -242,6 +268,13 @@ void init_laws(void)
disable_law(0);
#endif
#if !defined(CONFIG_SECURE_BOOT)
/*
* if any non DDR LAWs has been created earlier, remove them before
* LAW table is parsed.
*/
disable_non_ddr_laws();
#endif
/*
* Any LAWs that were set up before we booted assume they are meant to
@ -254,15 +287,6 @@ void init_laws(void)
gd->arch.used_laws |= (1 << i);
}
#if (defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)) || \
(defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD))
/*
* in SPL boot we've already parsed the law_table and setup those LAWs
* so don't do it again.
*/
return;
#endif
for (i = 0; i < num_law_entries; i++) {
if (law_table[i].index == -1)
set_next_law(law_table[i].addr, law_table[i].size,