imx: Add basic support for the NXP IMXRT10xx SoC family

Add i.IMXRT family basic support.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/imxrt/soc.c b/arch/arm/mach-imx/imxrt/soc.c
new file mode 100644
index 0000000..e1eea23
--- /dev/null
+++ b/arch/arm/mach-imx/imxrt/soc.c
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/armv7_mpu.h>
+
+int arch_cpu_init(void)
+{
+	int i;
+
+	struct mpu_region_config imxrt1050_region_config[] = {
+		{ 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
+		  STRONG_ORDER, REGION_4GB },
+		{ PHYS_SDRAM, REGION_1, XN_DIS, PRIV_RW_USR_RW,
+		  O_I_WB_RD_WR_ALLOC, (ffs(PHYS_SDRAM_SIZE) - 2) },
+		{ DMAMEM_BASE,
+		  REGION_2, XN_DIS, PRIV_RW_USR_RW,
+		  STRONG_ORDER, (ffs(DMAMEM_SZ_ALL) - 2) },
+	};
+
+	/*
+	 * Configure the memory protection unit (MPU) to allow full access to
+	 * the whole 4GB address space.
+	 */
+	disable_mpu();
+	for (i = 0; i < ARRAY_SIZE(imxrt1050_region_config); i++)
+		mpu_config(&imxrt1050_region_config[i]);
+	enable_mpu();
+
+	return 0;
+}