Hi Thor, On 11/07/2014 10:54 AM, tthayer@xxxxxxxxxxxxxxxxxxxxx wrote: > From: Thor Thayer <tthayer@xxxxxxxxxxxxxxxxxxxxx> > > This patch enables the ECC for L2 cache on machine > startup. The ECC has to be enabled before data is > is stored in memory otherwise the ECC will fail on > reads. > > Signed-off-by: Thor Thayer <tthayer@xxxxxxxxxxxxxxxxxxxxx> > --- > v2: Split OCRAM initialization into separate patch. > > v3/4: No change > --- > MAINTAINERS | 1 + > arch/arm/mach-socfpga/Makefile | 1 + > arch/arm/mach-socfpga/l2_cache.c | 44 ++++++++++++++++++++++++++++++++++++++ > arch/arm/mach-socfpga/l2_cache.h | 28 ++++++++++++++++++++++++ > arch/arm/mach-socfpga/socfpga.c | 5 ++++- > 5 files changed, 78 insertions(+), 1 deletion(-) > create mode 100644 arch/arm/mach-socfpga/l2_cache.c > create mode 100644 arch/arm/mach-socfpga/l2_cache.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index ee1bc5b..d0c7752 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -1407,6 +1407,7 @@ ARM/SOCFPGA EDAC SUPPORT > M: Thor Thayer <tthayer@xxxxxxxxxxxxxxxxxxxxx> > S: Maintained > F: drivers/edac/altera_edac. > +F: arch/arm/mach-socfpga/l2_cache.* > > ARM/STI ARCHITECTURE > M: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxx> > diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile > index 6dd7a93..142609e 100644 > --- a/arch/arm/mach-socfpga/Makefile > +++ b/arch/arm/mach-socfpga/Makefile > @@ -4,3 +4,4 @@ > > obj-y := socfpga.o > obj-$(CONFIG_SMP) += headsmp.o platsmp.o > +obj-$(CONFIG_EDAC_ALTERA_L2C) += l2_cache.o > diff --git a/arch/arm/mach-socfpga/l2_cache.c b/arch/arm/mach-socfpga/l2_cache.c > new file mode 100644 > index 0000000..8e109f3 > --- /dev/null > +++ b/arch/arm/mach-socfpga/l2_cache.c > @@ -0,0 +1,44 @@ > +/* > + * Copyright Altera Corporation (C) 2014. All rights reserved. > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. > + */ > +#include <linux/clk-provider.h> Why clk-provider.h and not io.h? > +#include <linux/of_platform.h> > +#include <linux/of_address.h> > + > +#include "l2_cache.h" > + > +void socfpga_init_l2_ecc(void) > +{ > + struct device_node *np; > + void __iomem *mapped_l2_edac_addr; > + > + np = of_find_compatible_node(NULL, NULL, "altr,l2-edac"); > + if (!np) { > + pr_err("SOCFPGA: Unable to find altr,l2-edac in dtb\n"); > + return; > + } > + > + mapped_l2_edac_addr = of_iomap(np, 0); > + if (!mapped_l2_edac_addr) { > + pr_err("SOCFPGA: Unable to find L2 ECC mapping in dtb\n"); > + return; > + } > + > + /* Enable ECC */ > + writel(0x01, mapped_l2_edac_addr); > + > + pr_debug("SOCFPGA: Success Initializing L2 cache ECC\n"); > +} > + Extra line here... > diff --git a/arch/arm/mach-socfpga/l2_cache.h b/arch/arm/mach-socfpga/l2_cache.h > new file mode 100644 > index 0000000..58e140d > --- /dev/null > +++ b/arch/arm/mach-socfpga/l2_cache.h > @@ -0,0 +1,28 @@ > +/* > + * Copyright Altera Corporation (C) 2014. All rights reserved. > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. > + */ > + > +#ifndef MACH_SOCFPGA_L2_CACHE_H > +#define MACH_SOCFPGA_L2_CACHE_H > + > +#ifdef CONFIG_EDAC_ALTERA_L2C > +void socfpga_init_l2_ecc(void); > +#else > +inline void socfpga_init_l2_ecc(void) > +{ > +} > +#endif > + > +#endif /* #ifndef MACH_SOCFPGA_L2_CACHE_H */ > diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c > index adbf383..af6413a 100644 > --- a/arch/arm/mach-socfpga/socfpga.c > +++ b/arch/arm/mach-socfpga/socfpga.c > @@ -1,5 +1,5 @@ > /* > - * Copyright (C) 2012 Altera Corporation > + * Copyright (C) 2012;2014 Altera Corporation Should be "2012-2014". > * > * 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 > @@ -25,6 +25,8 @@ > #include <asm/mach/map.h> > > #include "core.h" > +#include "l2_cache.h" > +#include "ocram.h" Including ocram.h should go into patch 2/5. But I think ocram.h can be removed as well if you just use IS_ENABLED(). > > void __iomem *socfpga_scu_base_addr = ((void __iomem *)(SOCFPGA_SCU_VIRT_BASE)); > void __iomem *sys_manager_base_addr; > @@ -83,6 +85,7 @@ static void __init socfpga_init_irq(void) > { > irqchip_init(); > socfpga_sysmgr_init(); > + socfpga_init_l2_ecc(); If you use "if (IS_ENABLED(CONFIG_EDAC_ALTERA_L2C))", then you can remove l2_cache.h. Dinh -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
