1 files changed, 66 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/mach-omap2/omap-cache.c b/roms/u-boot/arch/arm/mach-omap2/omap-cache.c
new file mode 100644
index 000000000..36db58824
--- /dev/null
+++ b/roms/u-boot/arch/arm/mach-omap2/omap-cache.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *
+ * Common functions for OMAP4/5 based boards
+ *
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author :
+ *	Aneesh V	<aneesh@ti.com>
+ *	Steve Sakoman	<steve@sakoman.com>
+ */
+
+#include <common.h>
+#include <cpu_func.h>
+#include <log.h>
+#include <asm/cache.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Without LPAE short descriptors are used
+ * Set C - Cache Bit3
+ * Set B - Buffer Bit2
+ * The last 2 bits set to 0b10
+ * Do Not set XN bit4
+ * So value is 0xe
+ *
+ * With LPAE cache configuration happens via MAIR0 register
+ * AttrIndx value is 0x3 for picking byte3 for MAIR0 which has 0xFF.
+ * 0xFF maps to Cache writeback with Read and Write Allocate set
+ * The bits[1:0] should have the value 0b01 for the first level
+ * descriptor.
+ * So the value is 0xd
+ */
+
+#ifdef CONFIG_ARMV7_LPAE
+#define ARMV7_DCACHE_POLICY	DCACHE_WRITEALLOC
+#else
+#define ARMV7_DCACHE_POLICY	DCACHE_WRITEBACK & ~TTB_SECT_XN_MASK
+#endif
+
+void enable_caches(void)
+{
+
+	/* Enable I cache if not enabled */
+	if (!icache_status())
+		icache_enable();
+
+	dcache_enable();
+}
+
+void dram_bank_mmu_setup(int bank)
+{
+	struct bd_info *bd = gd->bd;
+	int	i;
+
+	u32 start = bd->bi_dram[bank].start >> MMU_SECTION_SHIFT;
+	u32 size = bd->bi_dram[bank].size >> MMU_SECTION_SHIFT;
+	u32 end = start + size;
+
+	debug("%s: bank: %d\n", __func__, bank);
+	for (i = start; i < end; i++)
+		set_section_dcache(i, ARMV7_DCACHE_POLICY);
+}