Add generic-nios2 machine to meta-altera

Add support for the Altera NIOS2 architecture and a generic machine config.
Also add Linux kernel defconfig for linux-yocto 4.1 package.

Heavily based on work by Walter Goossens <waltergoossens@home.nl>

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Thomas Chou <thomas@wytron.com.tw>
Cc: Walter Goossens <waltergoossens@home.nl>
Cc: Yves Vandervennet <yvanderv@opensource.altera.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/conf/machine/include/nios2/feature-nios2-fpu.inc b/conf/machine/include/nios2/feature-nios2-fpu.inc
new file mode 100644
index 0000000..5baeb40
--- /dev/null
+++ b/conf/machine/include/nios2/feature-nios2-fpu.inc
@@ -0,0 +1,15 @@
+TARGET_FPU = "fpu-other"
+
+TUNEVALID[fpu-soft] = "Use Nios2 software FPU"
+TUNEVALID[fpu-custom] = "Enable Nios2 hardware FPU"
+TUNEVALID[fpu-customdiv] = "Enable Nios2 hardware FPU with divider"
+
+# Establish which fpu is configured in TUNE_FEATURES. Soft is the default for gcc.
+NIOS2CCARGSFPU_BASIC = "${@bb.utils.contains("TUNE_FEATURES", "fpu-custom", "-mcustom-fpu-cfg=60-1", "", d)}"
+NIOS2CCARGSFPU = "${@bb.utils.contains("TUNE_FEATURES", "fpu-customdiv", "-mcustom-fpu-cfg=60-2", "${NIOS2CCARGSFPU_BASIC}", d)}"
+
+NIOS2PKGFPU_BASIC = "${@bb.utils.contains("TUNE_FEATURES", "fpu-custom", "-fpu", "", d)}"
+NIOS2PKGFPU = "${@bb.utils.contains("TUNE_FEATURES", "fpu-customdiv", "-fpudiv", "${NIOS2PKGFPU_BASIC}", d)}"
+
+TUNECONFLICTS[fpu-custom] = "fpu-soft fpu-customdiv"
+TUNECONFLICTS[fpu-customdiv] = "fpu-soft fpu-custom"