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| author | Marek Vasut <marex@denx.de> | 2017-04-19 13:19:01 +0200 |
|---|---|---|
| committer | Ley Foon Tan <ley.foon.tan@intel.com> | 2017-05-08 10:59:19 +0200 |
| commit | 23460839b983d5d8d47fe90f341599f66523dd81 (patch) | |
| tree | 8e123c504595afe9e5463b9c88a35a7988f7d7ae | |
| parent | nios2: Add NIOS2_ARCH_REVISION to select between R1 and R2 (diff) | |
| download | linux-23460839b983d5d8d47fe90f341599f66523dd81.tar.xz linux-23460839b983d5d8d47fe90f341599f66523dd81.zip | |
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>
| -rw-r--r-- | arch/nios2/Makefile | 1 | ||||
| -rw-r--r-- | arch/nios2/include/asm/cpuinfo.h | 1 | ||||
| -rw-r--r-- | arch/nios2/kernel/cpuinfo.c | 10 | ||||
| -rw-r--r-- | arch/nios2/platform/Kconfig.platform | 9 |
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 |