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arm64: zynqmp: Setup MMU map for DDR at run time

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This patch fills the MMU map for DDR at run time based on information read
from Device Tree or automatically detected from static configuration.

The patch is needed because for systems which has for example 1GB of memory
but MMU map is 2GB there could be spurious accesses which was seen in past
when mapping is not fitting with actual memory installed.

Signed-off-by: Nitin Jain <nitin.jain@xilinx.com>
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Nitin Jain
2018-04-20 12:30:40 +05:30
committed by Michal Simek
parent 767afebbcd
commit 0678941ae5
3 changed files with 74 additions and 34 deletions
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22
board/xilinx/zynqmp/zynqmp.c
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@@ -405,7 +405,15 @@ unsigned long do_go_exec(ulong (*entry)(int, char * const []), int argc,
#if !defined(CONFIG_SYS_SDRAM_BASE) && !defined(CONFIG_SYS_SDRAM_SIZE)
int dram_init_banksize(void)
{
return fdtdec_setup_memory_banksize();
int ret;
ret = fdtdec_setup_memory_banksize();
if (ret)
return ret;
mem_map_fill();
return 0;
}
int dram_init(void)
@@ -416,6 +424,18 @@ int dram_init(void)
return 0;
}
#else
int dram_init_banksize(void)
{
#if defined(CONFIG_NR_DRAM_BANKS)
gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
gd->bd->bi_dram[0].size = get_effective_memsize();
#endif
mem_map_fill();
return 0;
}
int dram_init(void)
{
gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,