From 6852aa0263cdc4d43ab8e23735e6e0973cadeb63 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Sun, 2 Apr 2017 20:08:29 -0700
Subject: nios2: add .gitignore entries for auto-generated files
Add .gitignore entries for nios2 specific files generated during the
build process.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
---
arch/nios2/boot/.gitignore | 2 ++
arch/nios2/kernel/.gitignore | 1 +
2 files changed, 3 insertions(+)
create mode 100644 arch/nios2/boot/.gitignore
create mode 100644 arch/nios2/kernel/.gitignore
(limited to 'arch')
diff --git a/arch/nios2/boot/.gitignore b/arch/nios2/boot/.gitignore
new file mode 100644
index 000000000000..109279ca5a4d
--- /dev/null
+++ b/arch/nios2/boot/.gitignore
@@ -0,0 +1,2 @@
+*.dtb
+vmImage
diff --git a/arch/nios2/kernel/.gitignore b/arch/nios2/kernel/.gitignore
new file mode 100644
index 000000000000..c5f676c3c224
--- /dev/null
+++ b/arch/nios2/kernel/.gitignore
@@ -0,0 +1 @@
+vmlinux.lds
--
cgit v1.2.3
From f679b311f0683be352cb73b28d7108eed79ef795 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Sun, 2 Apr 2017 20:08:40 -0700
Subject: nios2: remove wrapper header for cmpxchg.h
Since commit 713e9b802e21 ("nios2: Switch to generic __xchg()")
asm/cmpxchg.h for nios2 is merely including asm-generic/cmpxchg.h. Thus,
the wrapper can be omitted and the generic header can be used directly.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
---
arch/nios2/include/asm/Kbuild | 1 +
arch/nios2/include/asm/cmpxchg.h | 14 --------------
2 files changed, 1 insertion(+), 14 deletions(-)
delete mode 100644 arch/nios2/include/asm/cmpxchg.h
(limited to 'arch')
diff --git a/arch/nios2/include/asm/Kbuild b/arch/nios2/include/asm/Kbuild
index 87e70f2b463f..727dbb333f60 100644
--- a/arch/nios2/include/asm/Kbuild
+++ b/arch/nios2/include/asm/Kbuild
@@ -6,6 +6,7 @@ generic-y += bitsperlong.h
generic-y += bug.h
generic-y += bugs.h
generic-y += clkdev.h
+generic-y += cmpxchg.h
generic-y += current.h
generic-y += device.h
generic-y += div64.h
diff --git a/arch/nios2/include/asm/cmpxchg.h b/arch/nios2/include/asm/cmpxchg.h
deleted file mode 100644
index a7978f14d157..000000000000
--- a/arch/nios2/include/asm/cmpxchg.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/*
- * Copyright (C) 2004 Microtronix Datacom Ltd.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#ifndef _ASM_NIOS2_CMPXCHG_H
-#define _ASM_NIOS2_CMPXCHG_H
-
-#include <asm-generic/cmpxchg.h>
-
-#endif /* _ASM_NIOS2_CMPXCHG_H */
--
cgit v1.2.3
From 57ac76ed6c0daf02c520e09e0af421f02ee2de8b Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Sun, 2 Apr 2017 20:08:52 -0700
Subject: nios2: constify irq_domain_ops
struct irq_domain_ops is not modified, so it can be made const.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
---
arch/nios2/kernel/irq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'arch')
diff --git a/arch/nios2/kernel/irq.c b/arch/nios2/kernel/irq.c
index f5b74ae69b5b..6c833a9d4eab 100644
--- a/arch/nios2/kernel/irq.c
+++ b/arch/nios2/kernel/irq.c
@@ -67,7 +67,7 @@ static int irq_map(struct irq_domain *h, unsigned int virq,
return 0;
}
-static struct irq_domain_ops irq_ops = {
+static const struct irq_domain_ops irq_ops = {
.map = irq_map,
.xlate = irq_domain_xlate_onecell,
};
--
cgit v1.2.3
From 44a4ed42576da5f3387005a1667cb3e7aedfd687 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Sun, 2 Apr 2017 20:09:04 -0700
Subject: nios2: enable earlycon support
Enable generic earlycon support for nios2. This e.g. allows to use a
8250/16650 UART as earlycon.
In order to get the earlycon, we just need to call parse_early_param()
in early_init_devtree() as soon as the device tree is initially scanned.
By adding an stdout-path property to the dts (done in this patch for
10m50_devboard), the earlycon can be used.
In order to provide early printk support, we need to provide a dummy
implementation of early_console_write(), so that
arch/nios2/kernel/early_printk.c can still be compiled if neither
SERIAL_ALTERA_JTAGUART_CONSOLE nor SERIAL_ALTERA_UART_CONSOLE is
selected. As soon as the altera_uart and altera_jtaguart support
earlycon, the entire file can be removed.
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
---
arch/nios2/Kconfig.debug | 1 -
arch/nios2/boot/dts/10m50_devboard.dts | 3 ++-
arch/nios2/kernel/early_printk.c | 7 +++++--
arch/nios2/kernel/setup.c | 2 ++
4 files changed, 9 insertions(+), 4 deletions(-)
(limited to 'arch')
diff --git a/arch/nios2/Kconfig.debug b/arch/nios2/Kconfig.debug
index 2fd08cbfdddb..55105220370c 100644
--- a/arch/nios2/Kconfig.debug
+++ b/arch/nios2/Kconfig.debug
@@ -18,7 +18,6 @@ config EARLY_PRINTK
bool "Activate early kernel debugging"
default y
select SERIAL_CORE_CONSOLE
- depends on SERIAL_ALTERA_JTAGUART_CONSOLE || SERIAL_ALTERA_UART_CONSOLE
help
Enable early printk on console
This is useful for kernel debugging when your machine crashes very
diff --git a/arch/nios2/boot/dts/10m50_devboard.dts b/arch/nios2/boot/dts/10m50_devboard.dts
index f362b2224ee7..4bb4dc1b52e9 100644
--- a/arch/nios2/boot/dts/10m50_devboard.dts
+++ b/arch/nios2/boot/dts/10m50_devboard.dts
@@ -244,6 +244,7 @@
};
chosen {
- bootargs = "debug console=ttyS0,115200";
+ bootargs = "debug earlycon console=ttyS0,115200";
+ stdout-path = &a_16550_uart_0;
};
};
diff --git a/arch/nios2/kernel/early_printk.c b/arch/nios2/kernel/early_printk.c
index c08e4c1486fc..4a7bb98f744c 100644
--- a/arch/nios2/kernel/early_printk.c
+++ b/arch/nios2/kernel/early_printk.c
@@ -81,8 +81,11 @@ static void early_console_write(struct console *con, const char *s, unsigned n)
}
#else
-# error Neither SERIAL_ALTERA_JTAGUART_CONSOLE nor SERIAL_ALTERA_UART_CONSOLE \
-selected
+
+static void early_console_write(struct console *con, const char *s, unsigned n)
+{
+}
+
#endif
static struct console early_console_prom = {
diff --git a/arch/nios2/kernel/setup.c b/arch/nios2/kernel/setup.c
index 6044d9be28b4..8b5146082e3e 100644
--- a/arch/nios2/kernel/setup.c
+++ b/arch/nios2/kernel/setup.c
@@ -137,6 +137,8 @@ asmlinkage void __init nios2_boot_init(unsigned r4, unsigned r5, unsigned r6,
strncpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
#endif
#endif
+
+ parse_early_param();
}
void __init setup_arch(char **cmdline_p)
--
cgit v1.2.3
From 4b40c1c092a932b5b5ab8154235080f02ae19a34 Mon Sep 17 00:00:00 2001
From: Julien Beraud <julien.beraud@spectracom.orolia.com>
Date: Wed, 5 Apr 2017 15:03:44 +0800
Subject: nios2: implement flush_dcache_mmap_lock/unlock
Use spin_lock/unlock_irq instead of doing nothing. This fixes corruptions
of the vma_interval_tree causing the kernel to be stuck in an
infinite loop in vma_interval_tree_foreach.
Signed-off-by: Julien Beraud <julien.beraud@spectracom.orolia.com>
Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
---
arch/nios2/include/asm/cacheflush.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
(limited to 'arch')
diff --git a/arch/nios2/include/asm/cacheflush.h b/arch/nios2/include/asm/cacheflush.h
index 52abba973dc2..55e383c173f7 100644
--- a/arch/nios2/include/asm/cacheflush.h
+++ b/arch/nios2/include/asm/cacheflush.h
@@ -46,7 +46,9 @@ extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
extern void flush_dcache_range(unsigned long start, unsigned long end);
extern void invalidate_dcache_range(unsigned long start, unsigned long end);
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+#define flush_dcache_mmap_lock(mapping) \
+ spin_lock_irq(&(mapping)->tree_lock)
+#define flush_dcache_mmap_unlock(mapping) \
+ spin_unlock_irq(&(mapping)->tree_lock)
#endif /* _ASM_NIOS2_CACHEFLUSH_H */
--
cgit v1.2.3
From a89988a6e00c5a099ee23619cd91dc8dc7ec9328 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Wed, 19 Apr 2017 13:19:00 +0200
Subject: nios2: Add NIOS2_ARCH_REVISION to select between R1 and R2
Allow user to select between Nios2 R1 and R2. Since R1 and R2 are
not binary compatible, we cannot have a single kernel binary and
there is no point in having DT property for discerning these two.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Ley Foon Tan <lftan@altera.com>
---
arch/nios2/Makefile | 3 +++
arch/nios2/kernel/cpuinfo.c | 2 ++
arch/nios2/platform/Kconfig.platform | 8 ++++++++
3 files changed, 13 insertions(+)
(limited to 'arch')
diff --git a/arch/nios2/Makefile b/arch/nios2/Makefile
index e74afc12d516..38da17e4c908 100644
--- a/arch/nios2/Makefile
+++ b/arch/nios2/Makefile
@@ -22,7 +22,10 @@ export MMU
LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-name)
+KBUILD_AFLAGS += -march=r$(CONFIG_NIOS2_ARCH_REVISION)
+
KBUILD_CFLAGS += -pipe -D__linux__ -D__ELF__
+KBUILD_CFLAGS += -march=r$(CONFIG_NIOS2_ARCH_REVISION)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_MUL_SUPPORT),-mhw-mul,-mno-hw-mul)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_MULX_SUPPORT),-mhw-mulx,-mno-hw-mulx)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_DIV_SUPPORT),-mhw-div,-mno-hw-div)
diff --git a/arch/nios2/kernel/cpuinfo.c b/arch/nios2/kernel/cpuinfo.c
index 1cccc36877bc..b4a6242b0f1c 100644
--- a/arch/nios2/kernel/cpuinfo.c
+++ b/arch/nios2/kernel/cpuinfo.c
@@ -125,12 +125,14 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m,
"CPU:\t\tNios II/%s\n"
+ "REV:\t\t%i\n"
"MMU:\t\t%s\n"
"FPU:\t\tnone\n"
"Clocking:\t%u.%02u MHz\n"
"BogoMips:\t%lu.%02lu\n"
"Calibration:\t%lu loops\n",
cpuinfo.cpu_impl,
+ CONFIG_NIOS2_ARCH_REVISION,
cpuinfo.mmu ? "present" : "none",
clockfreq / 1000000, (clockfreq / 100000) % 10,
(loops_per_jiffy * HZ) / 500000,
diff --git a/arch/nios2/platform/Kconfig.platform b/arch/nios2/platform/Kconfig.platform
index d3e5df9fb36b..b7ac5b90c399 100644
--- a/arch/nios2/platform/Kconfig.platform
+++ b/arch/nios2/platform/Kconfig.platform
@@ -52,6 +52,14 @@ config NIOS2_DTB_SOURCE
comment "Nios II instructions"
+config NIOS2_ARCH_REVISION
+ int "Select Nios II architecture revision"
+ range 1 2
+ default 1
+ help
+ Select between Nios II R1 and Nios II R2 . The architectures
+ are binary incompatible. Default is R1 .
+
config NIOS2_HW_MUL_SUPPORT
bool "Enable MUL instruction"
default n
--
cgit v1.2.3
From 23460839b983d5d8d47fe90f341599f66523dd81 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Wed, 19 Apr 2017 13:19:01 +0200
Subject: nios2: Add BMX support
Add support for the BMX Bit Manipulation Extensions present in
Nios II R2 . This introduces three new instructions, EXTRACT,
INSERT and MERGE.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Ley Foon Tan <lftan@altera.com>
---
arch/nios2/Makefile | 1 +
arch/nios2/include/asm/cpuinfo.h | 1 +
arch/nios2/kernel/cpuinfo.c | 10 ++++++++--
arch/nios2/platform/Kconfig.platform | 9 +++++++++
4 files changed, 19 insertions(+), 2 deletions(-)
(limited to 'arch')
diff --git a/arch/nios2/Makefile b/arch/nios2/Makefile
index 38da17e4c908..74109c01eaea 100644
--- a/arch/nios2/Makefile
+++ b/arch/nios2/Makefile
@@ -29,6 +29,7 @@ KBUILD_CFLAGS += -march=r$(CONFIG_NIOS2_ARCH_REVISION)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_MUL_SUPPORT),-mhw-mul,-mno-hw-mul)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_MULX_SUPPORT),-mhw-mulx,-mno-hw-mulx)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_DIV_SUPPORT),-mhw-div,-mno-hw-div)
+KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_BMX_SUPPORT),-mbmx,-mno-bmx)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_FPU_SUPPORT),-mcustom-fpu-cfg=60-1,)
KBUILD_CFLAGS += -fno-optimize-sibling-calls
diff --git a/arch/nios2/include/asm/cpuinfo.h b/arch/nios2/include/asm/cpuinfo.h
index 348bb228fec9..79d376435d7d 100644
--- a/arch/nios2/include/asm/cpuinfo.h
+++ b/arch/nios2/include/asm/cpuinfo.h
@@ -29,6 +29,7 @@ struct cpuinfo {
bool has_div;
bool has_mul;
bool has_mulx;
+ bool has_bmx;
/* CPU caches */
u32 icache_line_size;
diff --git a/arch/nios2/kernel/cpuinfo.c b/arch/nios2/kernel/cpuinfo.c
index b4a6242b0f1c..4c84fec34882 100644
--- a/arch/nios2/kernel/cpuinfo.c
+++ b/arch/nios2/kernel/cpuinfo.c
@@ -67,6 +67,7 @@ void __init setup_cpuinfo(void)
cpuinfo.has_div = of_property_read_bool(cpu, "altr,has-div");
cpuinfo.has_mul = of_property_read_bool(cpu, "altr,has-mul");
cpuinfo.has_mulx = of_property_read_bool(cpu, "altr,has-mulx");
+ cpuinfo.has_bmx = of_property_read_bool(cpu, "altr,has-bmx");
cpuinfo.mmu = of_property_read_bool(cpu, "altr,has-mmu");
if (IS_ENABLED(CONFIG_NIOS2_HW_DIV_SUPPORT) && !cpuinfo.has_div)
@@ -78,6 +79,9 @@ void __init setup_cpuinfo(void)
if (IS_ENABLED(CONFIG_NIOS2_HW_MULX_SUPPORT) && !cpuinfo.has_mulx)
err_cpu("MULX");
+ if (IS_ENABLED(CONFIG_NIOS2_BMX_SUPPORT) && !cpuinfo.has_bmx)
+ err_cpu("BMX");
+
cpuinfo.tlb_num_ways = fcpu(cpu, "altr,tlb-num-ways");
if (!cpuinfo.tlb_num_ways)
panic("altr,tlb-num-ways can't be 0. Please check your hardware "
@@ -143,10 +147,12 @@ static int show_cpuinfo(struct seq_file *m, void *v)
"HW:\n"
" MUL:\t\t%s\n"
" MULX:\t\t%s\n"
- " DIV:\t\t%s\n",
+ " DIV:\t\t%s\n"
+ " BMX:\t\t%s\n",
cpuinfo.has_mul ? "yes" : "no",
cpuinfo.has_mulx ? "yes" : "no",
- cpuinfo.has_div ? "yes" : "no");
+ cpuinfo.has_div ? "yes" : "no",
+ cpuinfo.has_bmx ? "yes" : "no");
seq_printf(m,
"Icache:\t\t%ukB, line length: %u\n",
diff --git a/arch/nios2/platform/Kconfig.platform b/arch/nios2/platform/Kconfig.platform
index b7ac5b90c399..b6a8bfd59491 100644
--- a/arch/nios2/platform/Kconfig.platform
+++ b/arch/nios2/platform/Kconfig.platform
@@ -81,6 +81,15 @@ config NIOS2_HW_DIV_SUPPORT
Set to true if you configured the Nios II to include the DIV
instruction. Enables the -mhw-div compiler flag.
+config NIOS2_BMX_SUPPORT
+ bool "Enable BMX instructions"
+ depends on NIOS2_ARCH_REVISION = 2
+ default n
+ help
+ Set to true if you configured the Nios II R2 to include
+ the BMX Bit Manipulation Extension instructions. Enables
+ the -mbmx compiler flag.
+
config NIOS2_FPU_SUPPORT
bool "Custom floating point instr support"
default n
--
cgit v1.2.3
From edebea98777d7090ea14bdce2e38e6798557729d Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Wed, 19 Apr 2017 13:19:02 +0200
Subject: nios2: Add CDX support
Add support for the CDX Code Density Extensions present in
Nios II R2 . This introduces new 16bit instruction set to
improve code density while retaining support for the 32bit
Nios II R2 instructions.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Ley Foon Tan <lftan@altera.com>
---
arch/nios2/Makefile | 1 +
arch/nios2/include/asm/cpuinfo.h | 1 +
arch/nios2/kernel/cpuinfo.c | 10 ++++++++--
arch/nios2/platform/Kconfig.platform | 9 +++++++++
4 files changed, 19 insertions(+), 2 deletions(-)
(limited to 'arch')
diff --git a/arch/nios2/Makefile b/arch/nios2/Makefile
index 74109c01eaea..8673a79dca9c 100644
--- a/arch/nios2/Makefile
+++ b/arch/nios2/Makefile
@@ -30,6 +30,7 @@ KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_MUL_SUPPORT),-mhw-mul,-mno-hw-mul)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_MULX_SUPPORT),-mhw-mulx,-mno-hw-mulx)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_DIV_SUPPORT),-mhw-div,-mno-hw-div)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_BMX_SUPPORT),-mbmx,-mno-bmx)
+KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_CDX_SUPPORT),-mcdx,-mno-cdx)
KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_FPU_SUPPORT),-mcustom-fpu-cfg=60-1,)
KBUILD_CFLAGS += -fno-optimize-sibling-calls
diff --git a/arch/nios2/include/asm/cpuinfo.h b/arch/nios2/include/asm/cpuinfo.h
index 79d376435d7d..dbdaf96f28d4 100644
--- a/arch/nios2/include/asm/cpuinfo.h
+++ b/arch/nios2/include/asm/cpuinfo.h
@@ -30,6 +30,7 @@ struct cpuinfo {
bool has_mul;
bool has_mulx;
bool has_bmx;
+ bool has_cdx;
/* CPU caches */
u32 icache_line_size;
diff --git a/arch/nios2/kernel/cpuinfo.c b/arch/nios2/kernel/cpuinfo.c
index 4c84fec34882..93207718bb22 100644
--- a/arch/nios2/kernel/cpuinfo.c
+++ b/arch/nios2/kernel/cpuinfo.c
@@ -68,6 +68,7 @@ void __init setup_cpuinfo(void)
cpuinfo.has_mul = of_property_read_bool(cpu, "altr,has-mul");
cpuinfo.has_mulx = of_property_read_bool(cpu, "altr,has-mulx");
cpuinfo.has_bmx = of_property_read_bool(cpu, "altr,has-bmx");
+ cpuinfo.has_cdx = of_property_read_bool(cpu, "altr,has-cdx");
cpuinfo.mmu = of_property_read_bool(cpu, "altr,has-mmu");
if (IS_ENABLED(CONFIG_NIOS2_HW_DIV_SUPPORT) && !cpuinfo.has_div)
@@ -82,6 +83,9 @@ void __init setup_cpuinfo(void)
if (IS_ENABLED(CONFIG_NIOS2_BMX_SUPPORT) && !cpuinfo.has_bmx)
err_cpu("BMX");
+ if (IS_ENABLED(CONFIG_NIOS2_CDX_SUPPORT) && !cpuinfo.has_cdx)
+ err_cpu("CDX");
+
cpuinfo.tlb_num_ways = fcpu(cpu, "altr,tlb-num-ways");
if (!cpuinfo.tlb_num_ways)
panic("altr,tlb-num-ways can't be 0. Please check your hardware "
@@ -148,11 +152,13 @@ static int show_cpuinfo(struct seq_file *m, void *v)
" MUL:\t\t%s\n"
" MULX:\t\t%s\n"
" DIV:\t\t%s\n"
- " BMX:\t\t%s\n",
+ " BMX:\t\t%s\n"
+ " CDX:\t\t%s\n",
cpuinfo.has_mul ? "yes" : "no",
cpuinfo.has_mulx ? "yes" : "no",
cpuinfo.has_div ? "yes" : "no",
- cpuinfo.has_bmx ? "yes" : "no");
+ cpuinfo.has_bmx ? "yes" : "no",
+ cpuinfo.has_cdx ? "yes" : "no");
seq_printf(m,
"Icache:\t\t%ukB, line length: %u\n",
diff --git a/arch/nios2/platform/Kconfig.platform b/arch/nios2/platform/Kconfig.platform
index b6a8bfd59491..74c1aaf588b8 100644
--- a/arch/nios2/platform/Kconfig.platform
+++ b/arch/nios2/platform/Kconfig.platform
@@ -90,6 +90,15 @@ config NIOS2_BMX_SUPPORT
the BMX Bit Manipulation Extension instructions. Enables
the -mbmx compiler flag.
+config NIOS2_CDX_SUPPORT
+ bool "Enable CDX instructions"
+ depends on NIOS2_ARCH_REVISION = 2
+ default n
+ help
+ Set to true if you configured the Nios II R2 to include
+ the CDX Bit Manipulation Extension instructions. Enables
+ the -mcdx compiler flag.
+
config NIOS2_FPU_SUPPORT
bool "Custom floating point instr support"
default n
--
cgit v1.2.3
From 7f1e614113ffe75f5ea7c99f641bf1b56f85be03 Mon Sep 17 00:00:00 2001
From: Ley Foon Tan <ley.foon.tan@intel.com>
Date: Mon, 8 May 2017 17:14:14 +0800
Subject: nios2: use generic strncpy_from_user() and strnlen_user()
This change enables the generic strncpy_from_user() and strnlen_user()
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
---
arch/nios2/Kconfig | 2 ++
arch/nios2/include/asm/uaccess.h | 7 +++++--
arch/nios2/mm/uaccess.c | 33 ---------------------------------
3 files changed, 7 insertions(+), 35 deletions(-)
(limited to 'arch')
diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
index 51a56c8b04b4..a72d5f0de692 100644
--- a/arch/nios2/Kconfig
+++ b/arch/nios2/Kconfig
@@ -6,6 +6,8 @@ config NIOS2
select GENERIC_CPU_DEVICES
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
+ select GENERIC_STRNCPY_FROM_USER
+ select GENERIC_STRNLEN_USER
select HAVE_ARCH_TRACEHOOK
select HAVE_ARCH_KGDB
select IRQ_DOMAIN
diff --git a/arch/nios2/include/asm/uaccess.h b/arch/nios2/include/asm/uaccess.h
index 727bd9504899..dfa3c7cb30b4 100644
--- a/arch/nios2/include/asm/uaccess.h
+++ b/arch/nios2/include/asm/uaccess.h
@@ -42,6 +42,8 @@
# define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n"
+#define user_addr_max() (uaccess_kernel() ? ~0UL : TASK_SIZE)
+
/*
* Zero Userspace
*/
@@ -81,8 +83,9 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n);
#define INLINE_COPY_TO_USER
extern long strncpy_from_user(char *__to, const char __user *__from,
- long __len);
-extern long strnlen_user(const char __user *s, long n);
+ long __len);
+extern __must_check long strlen_user(const char __user *str);
+extern __must_check long strnlen_user(const char __user *s, long n);
/* Optimized macros */
#define __get_user_asm(val, insn, addr, err) \
diff --git a/arch/nios2/mm/uaccess.c b/arch/nios2/mm/uaccess.c
index 804983317766..34f10af8ea40 100644
--- a/arch/nios2/mm/uaccess.c
+++ b/arch/nios2/mm/uaccess.c
@@ -128,36 +128,3 @@ asm(
".word 12b,13b\n"
".previous\n");
EXPORT_SYMBOL(raw_copy_to_user);
-
-long strncpy_from_user(char *__to, const char __user *__from, long __len)
-{
- int l = strnlen_user(__from, __len);
- int is_zt = 1;
-
- if (l > __len) {
- is_zt = 0;
- l = __len;
- }
-
- if (l == 0 || copy_from_user(__to, __from, l))
- return -EFAULT;
-
- if (is_zt)
- l--;
- return l;
-}
-
-long strnlen_user(const char __user *s, long n)
-{
- long i;
-
- for (i = 0; i < n; i++) {
- char c;
-
- if (get_user(c, s + i) == -EFAULT)
- return 0;
- if (c == 0)
- return i + 1;
- }
- return n + 1;
-}
--
cgit v1.2.3
From e118c3fec9c0d8d2a96462c4c035305dc952e402 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Thu, 11 May 2017 11:40:16 +0200
Subject: nios2: remove custom early console implementation
As of commits d8f347ba35cf ("nios2: enable earlycon support"),
0dcc0542a006 ("serial: altera_jtaguart: add earlycon support") and
4d9d7d896d77 ("serial: altera_uart: add earlycon support"), the nios2
architecture and the altera_uart/altera_jtaguart drivers support
earlycon. Thus, the custom early console implementation for nios2 is no
longer necessary to get early boot messages. Remove it and rely fully on
earlycon support.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
---
arch/nios2/include/asm/prom.h | 22 -------
arch/nios2/include/asm/setup.h | 2 -
arch/nios2/kernel/Makefile | 1 -
arch/nios2/kernel/early_printk.c | 121 ---------------------------------------
arch/nios2/kernel/prom.c | 49 ----------------
arch/nios2/kernel/setup.c | 4 --
6 files changed, 199 deletions(-)
delete mode 100644 arch/nios2/include/asm/prom.h
delete mode 100644 arch/nios2/kernel/early_printk.c
(limited to 'arch')
diff --git a/arch/nios2/include/asm/prom.h b/arch/nios2/include/asm/prom.h
deleted file mode 100644
index 75fffb42cfa5..000000000000
--- a/arch/nios2/include/asm/prom.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright Altera Corporation (C) <2015>. 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 __ASM_NIOS2_PROM_H__
-#define __ASM_NIOS2_PROM_H__
-
-extern unsigned long __init of_early_console(void);
-
-#endif
diff --git a/arch/nios2/include/asm/setup.h b/arch/nios2/include/asm/setup.h
index dcbf8cf1a344..ac9bff248e6d 100644
--- a/arch/nios2/include/asm/setup.h
+++ b/arch/nios2/include/asm/setup.h
@@ -30,8 +30,6 @@ extern char fast_handler_end[];
extern void pagetable_init(void);
-extern void setup_early_printk(void);
-
#endif/* __KERNEL__ */
#endif /* __ASSEMBLY__ */
diff --git a/arch/nios2/kernel/Makefile b/arch/nios2/kernel/Makefile
index 1aae25703657..06d07432b38d 100644
--- a/arch/nios2/kernel/Makefile
+++ b/arch/nios2/kernel/Makefile
@@ -20,7 +20,6 @@ obj-y += syscall_table.o
obj-y += time.o
obj-y += traps.o
-obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_NIOS2_ALIGNMENT_TRAP) += misaligned.o
diff --git a/arch/nios2/kernel/early_printk.c b/arch/nios2/kernel/early_printk.c
deleted file mode 100644
index 4a7bb98f744c..000000000000
--- a/arch/nios2/kernel/early_printk.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * Early printk for Nios2.
- *
- * Copyright (C) 2015, Altera Corporation
- * Copyright (C) 2010, Tobias Klauser <tklauser@distanz.ch>
- * Copyright (C) 2009, Wind River Systems Inc
- * Implemented by fredrik.markstrom@gmail.com and ivarholmqvist@gmail.com
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/io.h>
-
-#include <asm/prom.h>
-
-static unsigned long base_addr;
-
-#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE)
-
-#define ALTERA_JTAGUART_DATA_REG 0
-#define ALTERA_JTAGUART_CONTROL_REG 4
-#define ALTERA_JTAGUART_CONTROL_WSPACE_MSK 0xFFFF0000
-#define ALTERA_JTAGUART_CONTROL_AC_MSK 0x00000400
-
-#define JUART_GET_CR() \
- __builtin_ldwio((void *)(base_addr + ALTERA_JTAGUART_CONTROL_REG))
-#define JUART_SET_CR(v) \
- __builtin_stwio((void *)(base_addr + ALTERA_JTAGUART_CONTROL_REG), v)
-#define JUART_SET_TX(v) \
- __builtin_stwio((void *)(base_addr + ALTERA_JTAGUART_DATA_REG), v)
-
-static void early_console_write(struct console *con, const char *s, unsigned n)
-{
- unsigned long status;
-
- while (n-- && *s) {
- while (((status = JUART_GET_CR())
- & ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) {
-#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS)
- if ((status & ALTERA_JTAGUART_CONTROL_AC_MSK) == 0)
- return; /* no connection activity */
-#endif
- }
- JUART_SET_TX(*s);
- s++;
- }
-}
-
-#elif defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE)
-
-#define ALTERA_UART_TXDATA_REG 4
-#define ALTERA_UART_STATUS_REG 8
-#define ALTERA_UART_STATUS_TRDY 0x0040
-
-#define UART_GET_SR() \
- __builtin_ldwio((void *)(base_addr + ALTERA_UART_STATUS_REG))
-#define UART_SET_TX(v) \
- __builtin_stwio((void *)(base_addr + ALTERA_UART_TXDATA_REG), v)
-
-static void early_console_putc(char c)
-{
- while (!(UART_GET_SR() & ALTERA_UART_STATUS_TRDY))
- ;
-
- UART_SET_TX(c);
-}
-
-static void early_console_write(struct console *con, const char *s, unsigned n)
-{
- while (n-- && *s) {
- early_console_putc(*s);
- if (*s == '\n')
- early_console_putc('\r');
- s++;
- }
-}
-
-#else
-
-static void early_console_write(struct console *con, const char *s, unsigned n)
-{
-}
-
-#endif
-
-static struct console early_console_prom = {
- .name = "early",
- .write = early_console_write,
- .flags = CON_PRINTBUFFER | CON_BOOT,
- .index = -1
-};
-
-void __init setup_early_printk(void)
-{
-#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) || \
- defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE)
- base_addr = of_early_console();
-#else
- base_addr = 0;
-#endif
-
- if (!base_addr)
- return;
-
-#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS)
- /* Clear activity bit so BYPASS doesn't stall if we've used JTAG for
- * downloading the kernel. This might cause early data to be lost even
- * if the JTAG terminal is running.
- */
- JUART_SET_CR(JUART_GET_CR() | ALTERA_JTAGUART_CONTROL_AC_MSK);
-#endif
-
- early_console = &early_console_prom;
- register_console(early_console);
- pr_info("early_console initialized at 0x%08lx\n", base_addr);
-}
diff --git a/arch/nios2/kernel/prom.c b/arch/nios2/kernel/prom.c
index 3901b80d4420..6688576b3a47 100644
--- a/arch/nios2/kernel/prom.c
+++ b/arch/nios2/kernel/prom.c
@@ -30,7 +30,6 @@
#include <linux/of_fdt.h>
#include <linux/io.h>
-#include <asm/prom.h>
#include <asm/sections.h>
void __init early_init_dt_add_memory_arch(u64 base, u64 size)
@@ -71,51 +70,3 @@ void __init early_init_devtree(void *params)
early_init_dt_scan(params);
}
-
-#ifdef CONFIG_EARLY_PRINTK
-static int __init early_init_dt_scan_serial(unsigned long node,
- const char *uname, int depth, void *data)
-{
- u64 *addr64 = (u64 *) data;
- const char *p;
-
- /* only consider serial nodes */
- if (strncmp(uname, "serial", 6) != 0)
- return 0;
-
- p = of_get_flat_dt_prop(node, "compatible", NULL);
- if (!p)
- return 0;
-
- /*
- * We found an altera_jtaguart but it wasn't configured for console, so
- * skip it.
- */
-#ifndef CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE
- if (strncmp(p, "altr,juart", 10) == 0)
- return 0;
-#endif
-
- /*
- * Same for altera_uart.
- */
-#ifndef CONFIG_SERIAL_ALTERA_UART_CONSOLE
- if (strncmp(p, "altr,uart", 9) == 0)
- return 0;
-#endif
-
- *addr64 = of_flat_dt_translate_address(node);
-
- return *addr64 == OF_BAD_ADDR ? 0 : 1;
-}
-
-unsigned long __init of_early_console(void)
-{
- u64 base = 0;
-
- if (of_scan_flat_dt(early_init_dt_scan_serial, &base))
- return (u32)ioremap(base, 32);
- else
- return 0;
-}
-#endif /* CONFIG_EARLY_PRINTK */
diff --git a/arch/nios2/kernel/setup.c b/arch/nios2/kernel/setup.c
index 8b5146082e3e..926a02b17b31 100644
--- a/arch/nios2/kernel/setup.c
+++ b/arch/nios2/kernel/setup.c
@@ -147,10 +147,6 @@ void __init setup_arch(char **cmdline_p)
console_verbose();
-#ifdef CONFIG_EARLY_PRINTK
- setup_early_printk();
-#endif
-
memory_start = PAGE_ALIGN((unsigned long)__pa(_end));
memory_end = (unsigned long) CONFIG_NIOS2_MEM_BASE + memory_size;
--
cgit v1.2.3