avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/arch/arm/lib/cache-pl310.c

@@ -0,0 +1,102 @@
+/*
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ * Aneesh V <aneesh@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <linux/types.h>
+#include <asm/io.h>
+#include <asm/armv7.h>
+#include <asm/pl310.h>
+#include <config.h>
+#include <common.h>
+
+struct pl310_regs *const pl310 = (struct pl310_regs *)CONFIG_SYS_PL310_BASE;
+
+static void pl310_cache_sync(void)
+{
+	writel(0, &pl310->pl310_cache_sync);
+}
+
+static void pl310_background_op_all_ways(u32 *op_reg)
+{
+	u32 assoc_16, associativity, way_mask;
+
+	assoc_16 = readl(&pl310->pl310_aux_ctrl) &
+			PL310_AUX_CTRL_ASSOCIATIVITY_MASK;
+	if (assoc_16)
+		associativity = 16;
+	else
+		associativity = 8;
+
+	way_mask = (1 << associativity) - 1;
+	/* Invalidate all ways */
+	writel(way_mask, op_reg);
+	/* Wait for all ways to be invalidated */
+	while (readl(op_reg) && way_mask)
+		;
+	pl310_cache_sync();
+}
+
+void v7_outer_cache_inval_all(void)
+{
+	pl310_background_op_all_ways(&pl310->pl310_inv_way);
+}
+
+void v7_outer_cache_flush_all(void)
+{
+	pl310_background_op_all_ways(&pl310->pl310_clean_inv_way);
+}
+
+/* Flush(clean invalidate) memory from start to stop-1 */
+void v7_outer_cache_flush_range(u32 start, u32 stop)
+{
+	/* PL310 currently supports only 32 bytes cache line */
+	u32 pa, line_size = 32;
+
+	/*
+	 * Align to the beginning of cache-line - this ensures that
+	 * the first 5 bits are 0 as required by PL310 TRM
+	 */
+	start &= ~(line_size - 1);
+
+	for (pa = start; pa < stop; pa = pa + line_size)
+		writel(pa, &pl310->pl310_clean_inv_line_pa);
+
+	pl310_cache_sync();
+}
+
+/* invalidate memory from start to stop-1 */
+void v7_outer_cache_inval_range(u32 start, u32 stop)
+{
+	/* PL310 currently supports only 32 bytes cache line */
+	u32 pa, line_size = 32;
+
+	/*
+	 * If start address is not aligned to cache-line do not
+	 * invalidate the first cache-line
+	 */
+	if (start & (line_size - 1)) {
+		printf("ERROR: %s - start address is not aligned - 0x%08x\n",
+			__func__, start);
+		/* move to next cache line */
+		start = (start + line_size - 1) & ~(line_size - 1);
+	}
+
+	/*
+	 * If stop address is not aligned to cache-line do not
+	 * invalidate the last cache-line
+	 */
+	if (stop & (line_size - 1)) {
+		printf("ERROR: %s - stop address is not aligned - 0x%08x\n",
+			__func__, stop);
+		/* align to the beginning of this cache line */
+		stop &= ~(line_size - 1);
+	}
+
+	for (pa = start; pa < stop; pa = pa + line_size)
+		writel(pa, &pl310->pl310_inv_line_pa);
+
+	pl310_cache_sync();
+}