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highbank: add l2x0 support 

not enable as on qemu this generate a undefined instruction exception

Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD 2013-02-13 11:06:43 +01:00 committed by Sascha Hauer
parent f6b23059c9
commit 2a6e668821
5 changed files with 76 additions and 0 deletions
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1
arch/arm/Kconfig
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@ -52,6 +52,7 @@ config ARCH_EP93XX
config ARCH_HIGHBANK
bool "Calxeda Highbank"
select HAS_DEBUG_LL
select ARCH_HAS_L2X0
select CPU_V7
select ARM_AMBA
select AMBA_SP804

1
arch/arm/mach-highbank/Makefile
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@ -1,3 +1,4 @@
obj-y += core.o
obj-y += devices.o
obj-y += reset.o
obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o smc.o

45
arch/arm/mach-highbank/cache-l2x0.c Normal file
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@ -0,0 +1,45 @@
/*
* Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio@jcrosoft.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* 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
*
*/
#include <common.h>
#include <init.h>
#include <io.h>
#include <asm/mmu.h>
#include <asm/cache-l2x0.h>
#include "core.h"
static void highbank_l2x0_disable(void)
{
/* Disable PL310 L2 Cache controller */
highbank_smc1(0x102, 0x0);
}
static int highbank_l2x0_init(void)
{
/* Enable PL310 L2 Cache controller */
highbank_smc1(0x102, 0x1);
l2x0_init(IOMEM(0xfff12000), 0, ~0UL);
outer_cache.disable = highbank_l2x0_disable;
return 0;
}
postmmu_initcall(highbank_l2x0_init);

2
arch/arm/mach-highbank/core.h Normal file
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@ -0,0 +1,2 @@
extern void highbank_smc1(int fn, int arg);

27
arch/arm/mach-highbank/smc.S Normal file
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@ -0,0 +1,27 @@
/*
* Copied from omap44xx-smc.S Copyright (C) 2010 Texas Instruments, Inc.
* Copyright 2012 Calxeda, Inc.
*
* 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.
*/
#include <linux/linkage.h>
/*
* This is common routine to manage secure monitor API
* used to modify the PL310 secure registers.
* 'r0' contains the value to be modified and 'r12' contains
* the monitor API number.
* Function signature : void highbank_smc1(u32 fn, u32 arg)
*/
ENTRY(highbank_smc1)
stmfd sp!, {r4-r11, lr}
mov r12, r0
mov r0, r1
dsb
smc #0
ldmfd sp!, {r4-r11, pc}
ENDPROC(highbank_smc1)