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 --- Changes for v2: Sending as it is
arch/powerpc/cpu/mpc8xxx/law.c | 43 +++++++++++++++++++++++++++++++--------- 1 file changed, 34 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/cpu/mpc8xxx/law.c b/arch/powerpc/cpu/mpc8xxx/law.c index a401083..0aa6ce1 100644 --- a/arch/powerpc/cpu/mpc8xxx/law.c +++ b/arch/powerpc/cpu/mpc8xxx/law.c @@ -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; @@ -233,6 +259,14 @@ void init_laws(void) #error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes #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 * be around and mark them used. @@ -244,15 +278,6 @@ 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,