nds32: Remove the architecture

As removal of nds32 has been ack'd for the Linux kernel, remove support
here as well.

Cc: Rick Chen <[email protected]>
Signed-off-by: Tom Rini <[email protected]>
Reviewed-by: Rick Chen <[email protected]>

.azure-pipelines.yml

@@ -431,10 +431,10 @@ stages:
       vmImage: $(ubuntu_vm)
     strategy:
       # Use almost the same target division in .travis.yml, only merged
-      # 4 small build jobs (arc/microblaze/nds32/xtensa) into one.
+      # 3 small build jobs (arc/microblaze/xtensa) into one.
       matrix:
-        arc_microblaze_nds32_xtensa:
-          BUILDMAN: "arc microblaze nds32 xtensa"
+        arc_microblaze_xtensa:
+          BUILDMAN: "arc microblaze xtensa"
         arm11_arm7_arm920t_arm946es:
           BUILDMAN: "arm11 arm7 arm920t arm946es"
         arm926ejs:

MAINTAINERS

@@ -1057,12 +1057,6 @@ S:	Orphaned (Since 2018-07)
 T:	git https://source.denx.de/u-boot/custodians/u-boot-nand-flash.git
 F:	drivers/mtd/nand/raw/
 
-NDS32
-M:	Rick Chen <[email protected]>
-S:	Maintained
-T:	git https://source.denx.de/u-boot/custodians/u-boot-nds32.git
-F:	arch/nds32/
-
 NETWORK
 M:	Joe Hershberger <[email protected]>
 M:	Ramon Fried <[email protected]>

README

@@ -134,7 +134,6 @@ Directory Hierarchy:
   /m68k			Files generic to m68k architecture
   /microblaze		Files generic to microblaze architecture
   /mips			Files generic to MIPS architecture
-  /nds32		Files generic to NDS32 architecture
   /nios2		Files generic to Altera NIOS2 architecture
   /powerpc		Files generic to PowerPC architecture
   /riscv		Files generic to RISC-V architecture
@@ -2689,8 +2688,8 @@ details; basically, the header defines the following image properties:
   LynxOS, pSOS, QNX, RTEMS, INTEGRITY;
   Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, INTEGRITY).
 * Target CPU Architecture (Provisions for Alpha, ARM, Intel x86,
-  IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
-  Currently supported: ARM, Intel x86, MIPS, NDS32, Nios II, PowerPC).
+  IA64, MIPS, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
+  Currently supported: ARM, Intel x86, MIPS, Nios II, PowerPC).
 * Compression Type (uncompressed, gzip, bzip2)
 * Load Address
 * Entry Point
@@ -3402,23 +3401,6 @@ On Nios II, the ABI is documented here:
     Note: on Nios II, we give "-G0" option to gcc and don't use gp
     to access small data sections, so gp is free.
 
-On NDS32, the following registers are used:
-
-	R0-R1:	argument/return
-	R2-R5:	argument
-	R15:	temporary register for assembler
-	R16:	trampoline register
-	R28:	frame pointer (FP)
-	R29:	global pointer (GP)
-	R30:	link register (LP)
-	R31:	stack pointer (SP)
-	PC:	program counter (PC)
-
-    ==> U-Boot will use R10 to hold a pointer to the global data
-
-NOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope,
-or current versions of GCC may "optimize" the code too much.
-
 On RISC-V, the following registers are used:
 
 	x0: hard-wired zero (zero)

arch/Kconfig

@@ -1,5 +1,5 @@
 config ARCH_MAP_SYSMEM
-	depends on SANDBOX || NDS32
+	depends on SANDBOX
 	def_bool y
 
 config CREATE_ARCH_SYMLINK
@@ -87,10 +87,6 @@ config MIPS
 	select SUPPORT_OF_CONTROL
 	select SPL_SEPARATE_BSS if SPL
 
-config NDS32
-	bool "NDS32 architecture"
-	select SUPPORT_OF_CONTROL
-
 config NIOS2
 	bool "Nios II architecture"
 	select CPU
@@ -382,7 +378,7 @@ config SYS_IMMR
 
 config SKIP_LOWLEVEL_INIT
 	bool "Skip the calls to certain low level initialization functions"
-	depends on ARM || NDS32 || MIPS || RISCV
+	depends on ARM || MIPS || RISCV
 	help
 	  If enabled, then certain low level initializations (like setting up
 	  the memory controller) are omitted and/or U-Boot does not relocate
@@ -393,7 +389,7 @@ config SKIP_LOWLEVEL_INIT
 
 config SPL_SKIP_LOWLEVEL_INIT
 	bool "Skip the calls to certain low level initialization functions"
-	depends on SPL && (ARM || NDS32 || MIPS || RISCV)
+	depends on SPL && (ARM || MIPS || RISCV)
 	help
 	  If enabled, then certain low level initializations (like setting up
 	  the memory controller) are omitted and/or U-Boot does not relocate
@@ -442,7 +438,6 @@ source "arch/arm/Kconfig"
 source "arch/m68k/Kconfig"
 source "arch/microblaze/Kconfig"
 source "arch/mips/Kconfig"
-source "arch/nds32/Kconfig"
 source "arch/nios2/Kconfig"
 source "arch/powerpc/Kconfig"
 source "arch/sandbox/Kconfig"