@@ -7,20 +7,21 @@ The ARM L2 cache representation in the device tree should be done as follows:
Required properties:
- compatible : should be one of:
- "arm,pl310-cache"
- "arm,l220-cache"
- "arm,l210-cache"
- "marvell,aurora-system-cache": Marvell Controller designed to be
+ "arm,pl310-cache"
+ "arm,l220-cache"
+ "arm,l210-cache"
+ "bcm,bcm11351-a2-pl310-cache": DEPRECATED by "brcm,bcm11351-a2-pl310-cache"
+ "brcm,bcm11351-a2-pl310-cache": For Broadcom bcm11351 chipset where an
+ offset needs to be added to the address before passing down to the L2
+ cache controller
+ "marvell,aurora-system-cache": Marvell Controller designed to be
compatible with the ARM one, with system cache mode (meaning
maintenance operations on L1 are broadcasted to the L2 and L2
performs the same operation).
- "marvell,"aurora-outer-cache: Marvell Controller designed to be
- compatible with the ARM one with outer cache mode.
- "brcm,bcm11351-a2-pl310-cache": For Broadcom bcm11351 chipset where an
- offset needs to be added to the address before passing down to the L2
- cache controller
- "bcm,bcm11351-a2-pl310-cache": DEPRECATED by
- "brcm,bcm11351-a2-pl310-cache"
+ "marvell,aurora-outer-cache": Marvell Controller designed to be
+ compatible with the ARM one with outer cache mode.
+ "marvell,tauros3-cache": Marvell Tauros3 cache controller, compatible
+ with arm,pl310-cache controller.
- cache-unified : Specifies the cache is a unified cache.
- cache-level : Should be set to 2 for a level 2 cache.
- reg : Physical base address and size of cache controller's memory mapped
@@ -131,6 +131,7 @@ struct l2x0_regs {
unsigned long prefetch_ctrl;
unsigned long pwr_ctrl;
unsigned long ctrl;
+ unsigned long aux2_ctrl;
};
extern struct l2x0_regs l2x0_saved_regs;
@@ -25,6 +25,7 @@
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
+#include "cache-tauros3.h"
#include "cache-aurora-l2.h"
#define CACHE_LINE_SIZE 32
@@ -767,6 +768,14 @@ static void aurora_save(void)
l2x0_saved_regs.aux_ctrl = readl_relaxed(l2x0_base + L2X0_AUX_CTRL);
}
+static void __init tauros3_save(void)
+{
+ l2x0_saved_regs.aux2_ctrl =
+ readl_relaxed(l2x0_base + TAUROS3_AUX2_CTRL);
+ l2x0_saved_regs.prefetch_ctrl =
+ readl_relaxed(l2x0_base + L2X0_PREFETCH_CTRL);
+}
+
static void l2x0_resume(void)
{
if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) {
@@ -821,6 +830,18 @@ static void aurora_resume(void)
}
}
+static void tauros3_resume(void)
+{
+ if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) {
+ writel_relaxed(l2x0_saved_regs.aux2_ctrl,
+ l2x0_base + TAUROS3_AUX2_CTRL);
+ writel_relaxed(l2x0_saved_regs.prefetch_ctrl,
+ l2x0_base + L2X0_PREFETCH_CTRL);
+ }
+
+ l2x0_resume();
+}
+
static void __init aurora_broadcast_l2_commands(void)
{
__u32 u;
@@ -906,6 +927,15 @@ static const struct l2x0_of_data aurora_no_outer_data = {
},
};
+static const struct l2x0_of_data tauros3_data = {
+ .setup = NULL,
+ .save = tauros3_save,
+ /* Tauros3 broadcasts L1 cache operations to L2 */
+ .outer_cache = {
+ .resume = tauros3_resume,
+ },
+};
+
static const struct l2x0_of_data bcm_l2x0_data = {
.setup = pl310_of_setup,
.save = pl310_save,
@@ -922,17 +952,20 @@ static const struct l2x0_of_data bcm_l2x0_data = {
};
static const struct of_device_id l2x0_ids[] __initconst = {
+ { .compatible = "bcm,bcm11351-a2-pl310-cache", /* deprecated name */
+ .data = (void *)&bcm_l2x0_data},
+ { .compatible = "brcm,bcm11351-a2-pl310-cache",
+ .data = (void *)&bcm_l2x0_data},
+ { .compatible = "marvell,aurora-outer-cache",
+ .data = (void *)&aurora_with_outer_data},
+ { .compatible = "marvell,aurora-system-cache",
+ .data = (void *)&aurora_no_outer_data},
+ { .compatible = "marvell,tauros3-cache",
+ .data = (void *)&tauros3_data },
+ /* keep ARM compatibles below non-ARM derivates */
{ .compatible = "arm,pl310-cache", .data = (void *)&pl310_data },
{ .compatible = "arm,l220-cache", .data = (void *)&l2x0_data },
{ .compatible = "arm,l210-cache", .data = (void *)&l2x0_data },
- { .compatible = "marvell,aurora-system-cache",
- .data = (void *)&aurora_no_outer_data},
- { .compatible = "marvell,aurora-outer-cache",
- .data = (void *)&aurora_with_outer_data},
- { .compatible = "brcm,bcm11351-a2-pl310-cache",
- .data = (void *)&bcm_l2x0_data},
- { .compatible = "bcm,bcm11351-a2-pl310-cache", /* deprecated name */
- .data = (void *)&bcm_l2x0_data},
{}
};
new file mode 100644
@@ -0,0 +1,41 @@
+/*
+ * Marvell Tauros3 cache controller includes
+ *
+ * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+ *
+ * based on GPL'ed 2.6 kernel sources
+ * (c) Marvell International Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __ASM_ARM_HARDWARE_TAUROS3_H
+#define __ASM_ARM_HARDWARE_TAUROS3_H
+
+/*
+ * Marvell Tauros3 L2CC is compatible with PL310 r0p0
+ * but with PREFETCH_CTRL (r2p0) and an additional event counter.
+ * Also, there is AUX2_CTRL for some Marvell specific control.
+ */
+
+#define TAUROS3_EVENT_CNT2_CFG 0x224
+#define TAUROS3_EVENT_CNT2_VAL 0x228
+#define TAUROS3_INV_ALL 0x780
+#define TAUROS3_CLEAN_ALL 0x784
+#define TAUROS3_AUX2_CTRL 0x820
+
+/* Registers shifts and masks */
+#define TAUROS3_AUX2_CTRL_LINEFILL_BURST8_EN (1 << 2)
+
+#endif