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authorMarek Vasut <marex@denx.de>2017-04-19 13:19:01 +0200
committerLey Foon Tan <ley.foon.tan@intel.com>2017-05-08 16:59:19 +0800
commit23460839b983d5d8d47fe90f341599f66523dd81 (patch)
tree8e123c504595afe9e5463b9c88a35a7988f7d7ae /arch
parenta89988a6e00c5a099ee23619cd91dc8dc7ec9328 (diff)
downloadlinux-23460839b983d5d8d47fe90f341599f66523dd81.tar.bz2
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/nios2/Makefile1
-rw-r--r--arch/nios2/include/asm/cpuinfo.h1
-rw-r--r--arch/nios2/kernel/cpuinfo.c10
-rw-r--r--arch/nios2/platform/Kconfig.platform9
4 files changed, 19 insertions, 2 deletions
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