From d532f025420de029914fb43734dec6be9b7128f6 Mon Sep 17 00:00:00 2001
From: Dan Tejada <dan.tejada@cantada.com>
Date: Wed, 22 Apr 2020 23:25:04 -0400
Subject: Experimental: Add support for the Texas Instruments C6X (TMS320C6000
 series) DSPs   -- c6x: Add support for c6x product families to pass on to
 uClibC-ng   -- c6x: Fix multilib support   -- c6x: Add patch fix internal
 instruction error (GCC 57295)

Signed-off-by: Dan Tejada <dan.tejada@cantada.com>
---
 scripts/build/arch/c6x.sh     | 81 +++++++++++++++++++++++++++++++++++++++++++
 scripts/build/kernel/linux.sh |  2 +-
 2 files changed, 82 insertions(+), 1 deletion(-)
 create mode 100644 scripts/build/arch/c6x.sh

(limited to 'scripts')

diff --git a/scripts/build/arch/c6x.sh b/scripts/build/arch/c6x.sh
new file mode 100644
index 00000000..27133897
--- /dev/null
+++ b/scripts/build/arch/c6x.sh
@@ -0,0 +1,81 @@
+# Compute c6x-specific values
+
+CT_DoArchUClibcConfig() {
+    local cfg="${1}"
+
+    CT_DoArchUClibcSelectArch "${cfg}" "c6x"
+}
+
+CT_DoArchTupleValues() {
+    CT_TARGET_ARCH="tic6x"
+    #binutils does not like uclibc in the tuple
+    if [ "${CT_TARGET_SYS}" = "uclibc" ]; then
+        CT_TARGET_SYS=
+    fi
+}
+
+CT_DoArchUClibcHeaderDir() {
+    local dir_var="${1}"
+    local cflags="${2}"
+
+    # If it is non-default multilib, add a suffix with architecture (reported by gcc)
+    # to the headers installation path.
+    if [ -n "${cflags}" ]; then
+        eval "${dir_var}="$( ${CT_TARGET}-${CT_CC} -print-multiarch ${cflags} )
+    fi
+}
+
+CT_DoArchUClibcCflags() {
+    local cfg="${1}"
+    local cflags="${2}"
+    local f
+
+    # Set default little endian options
+    CT_KconfigDisableOption "ARCH_BIG_ENDIAN" "${cfg}"
+    CT_KconfigDisableOption "ARCH_WANTS_BIG_ENDIAN" "${cfg}"
+    CT_KconfigEnableOption "ARCH_LITTLE_ENDIAN" "${cfg}"
+    CT_KconfigEnableOption "ARCH_WANTS_LITTLE_ENDIAN" "${cfg}"
+
+    # Set arch options based on march switch
+    CT_KconfigDisableOption "CONFIG_TMS320C674X" "${cfg}"
+    CT_KconfigDisableOption "CONFIG_TMS320C64XPLUS" "${cfg}"
+    CT_KconfigDisableOption "CONFIG_TMS320C64X" "${cfg}"
+    CT_KconfigDisableOption "UCLIBC_HAS_FPU" "${cfg}"
+    CT_KconfigEnableOption "CONFIG_GENERIC_C6X" "${cfg}"
+
+    for f in ${cflags}; do
+        case "${f}" in
+            -march=*)
+                case "${f#-march=}" in
+                    c674x)  
+                        CT_KconfigEnableOption "CONFIG_TMS320C674X" "${cfg}"
+                        CT_KconfigEnableOption "UCLIBC_HAS_FPU" "${cfg}"
+                        CT_KconfigDisableOption "CONFIG_GENERIC_C6X" "${cfg}"
+                        ;;
+                    c64x+) 
+                        CT_KconfigEnableOption "CONFIG_TMS320C64XPLUS" "${cfg}"
+                        CT_KconfigDisableOption "CONFIG_GENERIC_C6X" "${cfg}"
+                        ;;
+                    c64x)  
+                        CT_KconfigEnableOption "CONFIG_TMS320C64X" "${cfg}"
+                        CT_KconfigDisableOption "CONFIG_GENERIC_C6X" "${cfg}"
+                        ;;
+                    c67x)
+                        CT_KconfigEnableOption "UCLIBC_HAS_FPU" "${cfg}"
+                        ;;
+                    c62x)
+                        ;;
+                    *)   CT_Abort "Unsupported architecture: ${f#-march=}";;
+                esac
+                ;;
+            -mlittle-endian)
+                ;;
+            -mbig-endian)
+                CT_KconfigEnableOption "ARCH_BIG_ENDIAN" "${cfg}"
+                CT_KconfigEnableOption "ARCH_WANTS_BIG_ENDIAN" "${cfg}"
+                CT_KconfigDisableOption "ARCH_LITTLE_ENDIAN" "${cfg}"
+                CT_KconfigDisableOption "ARCH_WANTS_LITTLE_ENDIAN" "${cfg}"
+                ;;
+        esac
+    done
+}
diff --git a/scripts/build/kernel/linux.sh b/scripts/build/kernel/linux.sh
index bfeadf07..4c962577 100644
--- a/scripts/build/kernel/linux.sh
+++ b/scripts/build/kernel/linux.sh
@@ -10,7 +10,7 @@ CT_DoKernelTupleValues()
         # should be added here when someone starts to care about them.
         case "${CT_ARCH}" in
             arm*)               CT_TARGET_KERNEL="linux" ;;
-            m68k|xtensa*)       CT_TARGET_KERNEL="uclinux" ;;
+            c6x|m68k|xtensa*)   CT_TARGET_KERNEL="uclinux" ;;
             *)                  CT_Abort "Unsupported no-mmu arch '${CT_ARCH}'"
         esac
     fi
-- 
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