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From: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
To: uboot-snps-arc@synopsys.com,
	Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Cc: u-boot@lists.denx.de, linux-snps-arc@lists.infradead.org,
	Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Subject: [PATCH] ARC: rework setting of ARC CPU specific compiler options
Date: Wed, 12 Feb 2020 14:23:54 +0300
Message-ID: <20200212112354.6990-1-Eugeniy.Paltsev@synopsys.com> (raw)

It's a very rare if at all existing occasion when ARC CPU template
is used as is w/o any changes - in the end it's a beauty and competitive
advantage of ARC cores to be tailored for a particular use-case - and
so it doesn't make a lot of sense to offer template-based "-mcpu" selection.
Given for each and every platform we end-up adding quite a few more flags
it's logical to move "-mcpu" selection to platform's definition as well
which we exactly do here.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
---
 arch/arc/config.mk                  | 20 --------------------
 board/abilis/tb100/config.mk        |  5 +++++
 board/synopsys/axs10x/config.mk     |  6 ++++++
 board/synopsys/emsdp/config.mk      |  2 +-
 board/synopsys/hsdk/config.mk       |  4 ++++
 board/synopsys/iot_devkit/config.mk |  3 ++-
 board/synopsys/nsim/Kconfig         |  9 +++++++++
 board/synopsys/nsim/config.mk       |  8 ++++++++
 configs/nsim_700_defconfig          |  1 +
 configs/nsim_700be_defconfig        |  1 +
 configs/nsim_hs38_defconfig         |  1 +
 configs/nsim_hs38be_defconfig       |  1 +
 12 files changed, 39 insertions(+), 22 deletions(-)
 create mode 100644 board/abilis/tb100/config.mk
 create mode 100644 board/synopsys/nsim/config.mk

diff --git a/arch/arc/config.mk b/arch/arc/config.mk
index 18005d99930..6fa29adae81 100644
--- a/arch/arc/config.mk
+++ b/arch/arc/config.mk
@@ -22,26 +22,6 @@ ifdef CONFIG_ARC_MMU_VER
 CONFIG_MMU = 1
 endif
 
-ifdef CONFIG_CPU_ARC750D
-PLATFORM_CPPFLAGS += -mcpu=arc700
-endif
-
-ifdef CONFIG_CPU_ARC770D
-PLATFORM_CPPFLAGS += -mcpu=arc700 -mlock -mswape
-endif
-
-ifdef CONFIG_CPU_ARCEM6
-PLATFORM_CPPFLAGS += -mcpu=arcem
-endif
-
-ifdef CONFIG_CPU_ARCHS34
-PLATFORM_CPPFLAGS += -mcpu=archs
-endif
-
-ifdef CONFIG_CPU_ARCHS38
-PLATFORM_CPPFLAGS += -mcpu=archs
-endif
-
 PLATFORM_CPPFLAGS += -ffixed-r25 -D__ARC__ -gdwarf-2 -mno-sdata
 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections -fno-common
 
diff --git a/board/abilis/tb100/config.mk b/board/abilis/tb100/config.mk
new file mode 100644
index 00000000000..9e8dee49bd3
--- /dev/null
+++ b/board/abilis/tb100/config.mk
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2020 Synopsys, Inc. All rights reserved.
+
+PLATFORM_CPPFLAGS += -mcpu=arc700 -mlock -mswape
diff --git a/board/synopsys/axs10x/config.mk b/board/synopsys/axs10x/config.mk
index 81ff498f818..ccac5442908 100644
--- a/board/synopsys/axs10x/config.mk
+++ b/board/synopsys/axs10x/config.mk
@@ -2,6 +2,12 @@
 #
 # Copyright (C) 2018 Synopsys, Inc. All rights reserved.
 
+ifdef CONFIG_TARGET_AXS103
+  PLATFORM_CPPFLAGS += -mcpu=archs
+else
+  PLATFORM_CPPFLAGS += -mcpu=arc700 -mlock -mswape
+endif
+
 bsp-generate: u-boot u-boot.bin
 ifdef CONFIG_ISA_ARCV2
 	$(Q)python3 $(srctree)/board/$(BOARDDIR)/headerize-axs.py \
diff --git a/board/synopsys/emsdp/config.mk b/board/synopsys/emsdp/config.mk
index 67fd7bf82a3..5bd10442aff 100644
--- a/board/synopsys/emsdp/config.mk
+++ b/board/synopsys/emsdp/config.mk
@@ -1,2 +1,2 @@
-PLATFORM_CPPFLAGS += -mlittle-endian -mnorm -mswap -mmpy-option=3 \
+PLATFORM_CPPFLAGS += -mcpu=arcem -mlittle-endian -mnorm -mswap -mmpy-option=3 \
                      -mbarrel-shifter -mfpu=fpuda_all -mcode-density
diff --git a/board/synopsys/hsdk/config.mk b/board/synopsys/hsdk/config.mk
index 9e280f921a1..5ae22fa2b75 100644
--- a/board/synopsys/hsdk/config.mk
+++ b/board/synopsys/hsdk/config.mk
@@ -2,6 +2,10 @@
 #
 # Copyright (C) 2018 Synopsys, Inc. All rights reserved.
 
+PLATFORM_CPPFLAGS += -mcpu=hs38_linux -mlittle-endian -matomic -mll64 \
+                     -mdiv-rem -mswap -mnorm -mmpy-option=9 -mbarrel-shifter \
+                     -mfpu=fpud_all
+
 bsp-generate: u-boot u-boot.bin
 	$(Q)python3 $(srctree)/board/$(BOARDDIR)/headerize-hsdk.py \
 		--arc-id 0x52 --image $(srctree)/u-boot.bin \
diff --git a/board/synopsys/iot_devkit/config.mk b/board/synopsys/iot_devkit/config.mk
index 120733538a4..e1e546a3d04 100644
--- a/board/synopsys/iot_devkit/config.mk
+++ b/board/synopsys/iot_devkit/config.mk
@@ -1,2 +1,3 @@
-PLATFORM_CPPFLAGS += -mlittle-endian -mcode-density -mdiv-rem -mswap -mnorm -mmpy-option=6 -mbarrel-shifter
+PLATFORM_CPPFLAGS += -mcpu=em4_fpuda -mlittle-endian -mcode-density -mdiv-rem \
+                     -mswap -mnorm -mmpy-option=6 -mbarrel-shifter
 LDSCRIPT = $(srctree)/board/synopsys/iot_devkit/u-boot.lds
diff --git a/board/synopsys/nsim/Kconfig b/board/synopsys/nsim/Kconfig
index 22287032bf5..b6966b2991e 100644
--- a/board/synopsys/nsim/Kconfig
+++ b/board/synopsys/nsim/Kconfig
@@ -9,4 +9,13 @@ config SYS_VENDOR
 config SYS_CONFIG_NAME
 	default "nsim"
 
+config NSIM_BOARD_CPPFLAGS
+	string "board arc-specific compiler options"
+	help
+	  For nSIM we allow to set custom arc-specific compiler options
+	  (like -mcpu=) instead of hardcoding them in its makefile as nSIM
+	  target is used for representing targets without fixed CPU version
+	  like FPGA-based boards and software simulators.
+	  This variable takes space separated compiler options list.
+
 endif
diff --git a/board/synopsys/nsim/config.mk b/board/synopsys/nsim/config.mk
new file mode 100644
index 00000000000..40f9578a25a
--- /dev/null
+++ b/board/synopsys/nsim/config.mk
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2020 Synopsys, Inc. All rights reserved.
+
+# CONFIG_NSIM_BOARD_CPPFLAGS is a string variable which comes from defconfig
+# with double quotes. We use echo to remove them so CONFIG_NSIM_BOARD_CPPFLAGS
+# won't be treated by compiler as a single option.
+PLATFORM_CPPFLAGS += $(shell echo $(CONFIG_NSIM_BOARD_CPPFLAGS))
diff --git a/configs/nsim_700_defconfig b/configs/nsim_700_defconfig
index 6a38e2c246a..5e897697843 100644
--- a/configs/nsim_700_defconfig
+++ b/configs/nsim_700_defconfig
@@ -1,5 +1,6 @@
 CONFIG_ARC=y
 CONFIG_TARGET_NSIM=y
+CONFIG_NSIM_BOARD_CPPFLAGS="-mcpu=arc700 -mlock -mswape"
 CONFIG_SYS_TEXT_BASE=0x81000000
 CONFIG_DEBUG_UART_BASE=0xf0000000
 CONFIG_DEBUG_UART_CLOCK=70000000
diff --git a/configs/nsim_700be_defconfig b/configs/nsim_700be_defconfig
index d3ed84a4154..03912712486 100644
--- a/configs/nsim_700be_defconfig
+++ b/configs/nsim_700be_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARC=y
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_TARGET_NSIM=y
+CONFIG_NSIM_BOARD_CPPFLAGS="-mcpu=arc700 -mlock -mswape"
 CONFIG_SYS_TEXT_BASE=0x81000000
 CONFIG_DEBUG_UART_BASE=0xf0000000
 CONFIG_DEBUG_UART_CLOCK=70000000
diff --git a/configs/nsim_hs38_defconfig b/configs/nsim_hs38_defconfig
index 2f46610d9cb..a6ebcc49a8c 100644
--- a/configs/nsim_hs38_defconfig
+++ b/configs/nsim_hs38_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARC=y
 CONFIG_ISA_ARCV2=y
 CONFIG_TARGET_NSIM=y
+CONFIG_NSIM_BOARD_CPPFLAGS="-mcpu=archs"
 CONFIG_SYS_TEXT_BASE=0x81000000
 CONFIG_DEBUG_UART_BASE=0xf0000000
 CONFIG_DEBUG_UART_CLOCK=70000000
diff --git a/configs/nsim_hs38be_defconfig b/configs/nsim_hs38be_defconfig
index b074b4ca98c..72472afb2b1 100644
--- a/configs/nsim_hs38be_defconfig
+++ b/configs/nsim_hs38be_defconfig
@@ -2,6 +2,7 @@ CONFIG_ARC=y
 CONFIG_ISA_ARCV2=y
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_TARGET_NSIM=y
+CONFIG_NSIM_BOARD_CPPFLAGS="-mcpu=archs"
 CONFIG_SYS_TEXT_BASE=0x81000000
 CONFIG_DEBUG_UART_BASE=0xf0000000
 CONFIG_DEBUG_UART_CLOCK=70000000
-- 
2.21.1


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