Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 189 insertions, 0 deletions

diff --git a/drivers/marvell/cache_llc.c b/drivers/marvell/cache_llc.c
new file mode 100644
index 0000000..4b06b47
--- /dev/null
+++ b/drivers/marvell/cache_llc.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2018 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+/* LLC driver is the Last Level Cache (L3C) driver
+ * for Marvell SoCs in AP806, AP807, and AP810
+ */
+
+#include <assert.h>
+
+#include <arch_helpers.h>
+#include <drivers/marvell/cache_llc.h>
+#include <drivers/marvell/ccu.h>
+#include <lib/mmio.h>
+
+#include <mvebu_def.h>
+
+#define CCU_HTC_CR(ap_index)		(MVEBU_CCU_BASE(ap_index) + 0x200)
+#define CCU_SET_POC_OFFSET		5
+
+extern void ca72_l2_enable_unique_clean(void);
+
+void llc_cache_sync(int ap_index)
+{
+	mmio_write_32(LLC_SYNC(ap_index), 0);
+	/* Atomic write, no need to wait */
+}
+
+void llc_flush_all(int ap_index)
+{
+	mmio_write_32(LLC_CLEAN_INV_WAY(ap_index), LLC_ALL_WAYS_MASK);
+	llc_cache_sync(ap_index);
+}
+
+void llc_clean_all(int ap_index)
+{
+	mmio_write_32(LLC_CLEAN_WAY(ap_index), LLC_ALL_WAYS_MASK);
+	llc_cache_sync(ap_index);
+}
+
+void llc_inv_all(int ap_index)
+{
+	mmio_write_32(LLC_INV_WAY(ap_index), LLC_ALL_WAYS_MASK);
+	llc_cache_sync(ap_index);
+}
+
+void llc_disable(int ap_index)
+{
+	llc_flush_all(ap_index);
+	mmio_write_32(LLC_CTRL(ap_index), 0);
+	dsbishst();
+}
+
+void llc_enable(int ap_index, int excl_mode)
+{
+	uint32_t val;
+
+	dsbsy();
+	llc_inv_all(ap_index);
+	dsbsy();
+
+	val = LLC_CTRL_EN;
+	if (excl_mode)
+		val |= LLC_EXCLUSIVE_EN;
+
+	mmio_write_32(LLC_CTRL(ap_index), val);
+	dsbsy();
+}
+
+int llc_is_exclusive(int ap_index)
+{
+	uint32_t reg;
+
+	reg = mmio_read_32(LLC_CTRL(ap_index));
+
+	if ((reg & (LLC_CTRL_EN | LLC_EXCLUSIVE_EN)) ==
+		   (LLC_CTRL_EN | LLC_EXCLUSIVE_EN))
+		return 1;
+
+	return 0;
+}
+
+void llc_runtime_enable(int ap_index)
+{
+	uint32_t reg;
+
+	reg = mmio_read_32(LLC_CTRL(ap_index));
+	if (reg & LLC_CTRL_EN)
+		return;
+
+	INFO("Enabling LLC\n");
+
+	/*
+	 * Enable L2 UniqueClean evictions with data
+	 *  Note: this configuration assumes that LLC is configured
+	 *	  in exclusive mode.
+	 *	  Later on in the code this assumption will be validated
+	 */
+	ca72_l2_enable_unique_clean();
+	llc_enable(ap_index, 1);
+
+	/* Set point of coherency to DDR.
+	 * This is required by units which have SW cache coherency
+	 */
+	reg = mmio_read_32(CCU_HTC_CR(ap_index));
+	reg |= (0x1 << CCU_SET_POC_OFFSET);
+	mmio_write_32(CCU_HTC_CR(ap_index), reg);
+}
+
+#if LLC_SRAM
+int llc_sram_enable(int ap_index, int size)
+{
+	uint32_t tc, way, ways_to_allocate;
+	uint32_t way_addr;
+
+	if ((size <= 0) || (size > LLC_SIZE) || (size % LLC_WAY_SIZE))
+		return -1;
+
+	llc_enable(ap_index, 1);
+	llc_inv_all(ap_index);
+
+	ways_to_allocate = size / LLC_WAY_SIZE;
+
+	/* Lockdown all available ways for all traffic classes */
+	for (tc = 0; tc < LLC_TC_NUM; tc++)
+		mmio_write_32(LLC_TCN_LOCK(ap_index, tc), LLC_ALL_WAYS_MASK);
+
+	/* Clear the high bits of SRAM address */
+	mmio_write_32(LLC_BANKED_MNT_AHR(ap_index), 0);
+
+	way_addr = PLAT_MARVELL_TRUSTED_RAM_BASE;
+	for (way = 0; way < ways_to_allocate; way++) {
+		/* Trigger allocation block command */
+		mmio_write_32(LLC_BLK_ALOC(ap_index),
+			      LLC_BLK_ALOC_BASE_ADDR(way_addr) |
+			      LLC_BLK_ALOC_WAY_DATA_SET |
+			      LLC_BLK_ALOC_WAY_ID(way));
+		way_addr += LLC_WAY_SIZE;
+	}
+	return 0;
+}
+
+void llc_sram_disable(int ap_index)
+{
+	uint32_t tc;
+
+	/* Disable the line lockings */
+	for (tc = 0; tc < LLC_TC_NUM; tc++)
+		mmio_write_32(LLC_TCN_LOCK(ap_index, tc), 0);
+
+	/* Invalidate all ways */
+	llc_inv_all(ap_index);
+}
+
+int llc_sram_test(int ap_index, int size, char *msg)
+{
+	uintptr_t addr, end_addr;
+	uint32_t data = 0;
+
+	if ((size <= 0) || (size > LLC_SIZE))
+		return -1;
+
+	INFO("=== LLC SRAM WRITE test %s\n", msg);
+	for (addr = PLAT_MARVELL_TRUSTED_RAM_BASE,
+	     end_addr = PLAT_MARVELL_TRUSTED_RAM_BASE + size;
+	     addr < end_addr; addr += 4) {
+		mmio_write_32(addr, addr);
+	}
+	INFO("=== LLC SRAM WRITE test %s PASSED\n", msg);
+	INFO("=== LLC SRAM READ test %s\n", msg);
+	for (addr = PLAT_MARVELL_TRUSTED_RAM_BASE,
+	     end_addr = PLAT_MARVELL_TRUSTED_RAM_BASE + size;
+	     addr < end_addr; addr += 4) {
+		data = mmio_read_32(addr);
+		if (data != addr) {
+			INFO("=== LLC SRAM READ test %s FAILED @ 0x%08lx)\n",
+			     msg, addr);
+			return -1;
+		}
+	}
+	INFO("=== LLC SRAM READ test %s PASSED (last read = 0x%08x)\n",
+	     msg, data);
+	return 0;
+}
+
+#endif /* LLC_SRAM */