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| author | Marek Vasut <marex@denx.de> | 2017-04-19 13:19:00 +0200 |
|---|---|---|
| committer | Ley Foon Tan <ley.foon.tan@intel.com> | 2017-05-08 10:59:19 +0200 |
| commit | a89988a6e00c5a099ee23619cd91dc8dc7ec9328 (patch) | |
| tree | d9e64b92b35f2a147c59295f512964192cd2be41 | |
| parent | nios2: implement flush_dcache_mmap_lock/unlock (diff) | |
| download | linux-a89988a6e00c5a099ee23619cd91dc8dc7ec9328.tar.xz linux-a89988a6e00c5a099ee23619cd91dc8dc7ec9328.zip | |
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>
| -rw-r--r-- | arch/nios2/Makefile | 3 | ||||
| -rw-r--r-- | arch/nios2/kernel/cpuinfo.c | 2 | ||||
| -rw-r--r-- | arch/nios2/platform/Kconfig.platform | 8 |
3 files changed, 13 insertions, 0 deletions
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 |