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ARM: 7922/1: l2x0: add Marvell Tauros3 support 

This adds support for the Marvell Tauros3 cache controller which
is compatible with pl310 cache controller but broadcasts L1 cache
operations to L2 cache. While updating the binding documentation,
clean up the list of possible compatibles. Also reorder driver
compatibles to allow non-ARM derivated to be compatible to ARM
cache controller compatibles.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Sebastian Hesselbarth 2013-12-13 16:42:19 +01:00 committed by Russell King
parent 017f161a55
commit e68f31f452
4 changed files with 94 additions and 19 deletions
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23
Documentation/devicetree/bindings/arm/l2cc.txt
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@ -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

1
arch/arm/include/asm/hardware/cache-l2x0.h
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@ -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;

48
arch/arm/mm/cache-l2x0.c
View File

@ -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 +952,19 @@ static const struct l2x0_of_data bcm_l2x0_data = {
};
static const struct of_device_id l2x0_ids[] __initconst = {
{ .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 = "arm,l220-cache", .data = (void *)&l2x0_data },
{ .compatible = "arm,pl310-cache", .data = (void *)&pl310_data },
{ .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 },
{}
};

41
arch/arm/mm/cache-tauros3.h Normal file
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@ -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