arm64: zynqmp: Provide a Kconfig option to use specified memory for MMU table
This patch provides a Kconfig option to use specified
memory for MMU table using reserve_mmu platform specific
routine. Here we used TCM space for MMU table.
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/cpu/armv8/zynqmp/Kconfig b/arch/arm/cpu/armv8/zynqmp/Kconfig
index 5ffc9f6..4dc8b1c 100644
--- a/arch/arm/cpu/armv8/zynqmp/Kconfig
+++ b/arch/arm/cpu/armv8/zynqmp/Kconfig
@@ -42,6 +42,13 @@
Based on this option include/configs/<CONFIG_SYS_CONFIG_NAME>.h header
will be used for board configuration.
+config SYS_MEM_RSVD_FOR_MMU
+ bool "Reserve memory for MMU Table"
+ help
+ If defined this option is used to setup different space for
+ MMU table than the one which will be allocated during
+ relocation.
+
config BOOT_INIT_FILE
string "boot.bin init register filename"
depends on SPL
diff --git a/arch/arm/cpu/armv8/zynqmp/cpu.c b/arch/arm/cpu/armv8/zynqmp/cpu.c
index 9b83e51..f026cb4 100644
--- a/arch/arm/cpu/armv8/zynqmp/cpu.c
+++ b/arch/arm/cpu/armv8/zynqmp/cpu.c
@@ -77,6 +77,18 @@
return 0x14000;
}
+#ifdef CONFIG_SYS_MEM_RSVD_FOR_MMU
+int reserve_mmu(void)
+{
+ initialize_tcm(TCM_LOCK);
+ memset((void *)ZYNQMP_TCM_BASE_ADDR, 0, ZYNQMP_TCM_SIZE);
+ gd->arch.tlb_size = PGTABLE_SIZE;
+ gd->arch.tlb_addr = ZYNQMP_TCM_BASE_ADDR;
+
+ return 0;
+}
+#endif
+
static unsigned int zynqmp_get_silicon_version_secure(void)
{
u32 ver;