1 files changed, 113 insertions, 0 deletions
diff --git a/arch/blackfin/lib/cache.c b/arch/blackfin/lib/cache.c
new file mode 100644
index 0000000..0a321a4
--- /dev/null
+++ b/arch/blackfin/lib/cache.c
@@ -0,0 +1,113 @@
+/*
+ * U-boot - cache.c
+ *
+ * Copyright (c) 2005-2008 Analog Devices Inc.
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <asm/blackfin.h>
+#include <asm/mach-common/bits/mpu.h>
+
+void flush_cache(unsigned long addr, unsigned long size)
+{
+	void *start_addr, *end_addr;
+	int istatus, dstatus;
+
+	/* no need to flush stuff in on chip memory (L1/L2/etc...) */
+	if (addr >= 0xE0000000)
+		return;
+
+	start_addr = (void *)addr;
+	end_addr = (void *)(addr + size);
+	istatus = icache_status();
+	dstatus = dcache_status();
+
+	if (istatus) {
+		if (dstatus)
+			blackfin_icache_dcache_flush_range(start_addr, end_addr);
+		else
+			blackfin_icache_flush_range(start_addr, end_addr);
+	} else if (dstatus)
+		blackfin_dcache_flush_range(start_addr, end_addr);
+}
+
+#ifdef CONFIG_DCACHE_WB
+static void flushinv_all_dcache(void)
+{
+	u32 way, bank, subbank, set;
+	u32 status, addr;
+	u32 dmem_ctl = bfin_read_DMEM_CONTROL();
+
+	for (bank = 0; bank < 2; ++bank) {
+		if (!(dmem_ctl & (1 << (DMC1_P - bank))))
+			continue;
+
+		for (way = 0; way < 2; ++way)
+			for (subbank = 0; subbank < 4; ++subbank)
+				for (set = 0; set < 64; ++set) {
+
+					bfin_write_DTEST_COMMAND(
+						way << 26 |
+						bank << 23 |
+						subbank << 16 |
+						set << 5
+					);
+					CSYNC();
+					status = bfin_read_DTEST_DATA0();
+
+					/* only worry about valid/dirty entries */
+					if ((status & 0x3) != 0x3)
+						continue;
+
+					/* construct the address using the tag */
+					addr = (status & 0xFFFFC800) | (subbank << 12) | (set << 5);
+
+					/* flush it */
+					__asm__ __volatile__("FLUSHINV[%0];" : : "a"(addr));
+				}
+	}
+}
+#endif
+
+void icache_enable(void)
+{
+	bfin_write_IMEM_CONTROL(IMC | ENICPLB);
+	SSYNC();
+}
+
+void icache_disable(void)
+{
+	bfin_write_IMEM_CONTROL(0);
+	SSYNC();
+}
+
+int icache_status(void)
+{
+	return bfin_read_IMEM_CONTROL() & IMC;
+}
+
+void dcache_enable(void)
+{
+	bfin_write_DMEM_CONTROL(ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
+	SSYNC();
+}
+
+void dcache_disable(void)
+{
+#ifdef CONFIG_DCACHE_WB
+	bfin_write_DMEM_CONTROL(bfin_read_DMEM_CONTROL() & ~(ENDCPLB));
+	flushinv_all_dcache();
+#endif
+	bfin_write_DMEM_CONTROL(0);
+	SSYNC();
+}
+
+int dcache_status(void)
+{
+	return bfin_read_DMEM_CONTROL() & ACACHE_BCACHE;
+}