Re: [PATCH] arm64: versal: Disable DDR cache mapping if DDR is not enabled

po 23. 3. 2020 v 15:44 odesílatel Michal Simek michal.simek@xilinx.com napsal:

Similar change was done in past by commit 3b644a3c2f69 ("arm64: zynqmp: Provide a config to not map DDR region in MMU table").

Signed-off-by: Michal Simek michal.simek@xilinx.com

arch/arm/mach-versal/Kconfig | 6 ++++++ arch/arm/mach-versal/cpu.c | 9 +++++++++ 2 files changed, 15 insertions(+)

diff --git a/arch/arm/mach-versal/Kconfig b/arch/arm/mach-versal/Kconfig index a08e5ae41490..e1d66e8d32b7 100644 --- a/arch/arm/mach-versal/Kconfig +++ b/arch/arm/mach-versal/Kconfig @@ -56,4 +56,10 @@ config DEFINE_TCM_OCM_MMAP This option if enabled defines the TCM and OCM memory and its memory attributes in MMU table entry.

+config VERSAL_NO_DDR

•   bool "Disable DDR MMU mapping"
  

•   help
  

•     This option configures MMU with no DDR to avoid speculative
  

•     access to DDR memory where DDR is not present.
  

endif diff --git a/arch/arm/mach-versal/cpu.c b/arch/arm/mach-versal/cpu.c index 6ee6cd43eca4..829a6c1b3e53 100644 --- a/arch/arm/mach-versal/cpu.c +++ b/arch/arm/mach-versal/cpu.c @@ -81,6 +81,15 @@ void mem_map_fill(void) if (!gd->bd->bi_dram[i].size) break;

+#if defined(CONFIG_VERSAL_NO_DDR)

•           if (gd->bd->bi_dram[i].start < 0x80000000UL ||
  

•               gd->bd->bi_dram[i].start > 0x100000000UL) {
  

•                   printf("Ignore caches over %llx/%llx\n",
  

•                          gd->bd->bi_dram[i].start,
  

•                          gd->bd->bi_dram[i].size);
  

•                   continue;
  

•           }
  

+#endif versal_mem_map[banks].virt = gd->bd->bi_dram[i].start; versal_mem_map[banks].phys = gd->bd->bi_dram[i].start; versal_mem_map[banks].size = gd->bd->bi_dram[i].size; -- 2.25.1

Applied. M