[U-Boot] [PATCH v6 2/2] armv8: fsl-layerscape: Make DDR non secure in MMU tables

[York Sun]

On 12/01/2015 10:38 PM, Hou Zhiqiang-B48286 wrote:

<snip>

>>  	/* Invalidate all table entries */
>>  	memset(level0_table, 0, PGTABLE_SIZE); @@ -269,6 +344,22 @@ static
>> inline void final_mmu_setup(void)
>>  			       &final_mmu_table[i]);
>>  		}
>>  	}
>> +	/* Set the secure memory to secure in MMU */ #ifdef
>> +CONFIG_SYS_MEM_RESERVE_SECURE
>> +	if (gd->secure_ram & MEM_RESERVE_SECURE_MAINTAINED) { #ifdef
>> +CONFIG_FSL_LSCH3
>> +		level2_table_secure = level2_table1 + 512; #elif
>> +defined(CONFIG_FSL_LSCH2)
>> +		level2_table_secure = level2_table2 + 512; #endif
>> +		/* update tlb pointer */
>> +		gd->arch.tlb_addr = gd->secure_ram & ~0x3;
> 
> The memory reserved for mmu table was lost? If it's better to record it and use for non-sec mmu table?

That can be arranged.

> 
> If this func is called from non-secure state, for example EL2, the secure memory cannot be accessed and the PMD_SECT_NS bit should be cleared.

We need to setup secure memory at EL3 to have secure memory to begin with. But
you have a point here. Will look into it.

York