From aec499c75cf8e0b599be4d559e6922b613085f8f Mon Sep 17 00:00:00 2001 From: Alan Kao Date: Wed, 2 Mar 2022 15:42:45 +0800 Subject: nds32: Remove the architecture The nds32 architecture, also known as AndeStar V3, is a custom 32-bit RISC target designed by Andes Technologies. Support was added to the kernel in 2016 as the replacement RISC-V based V5 processors were already announced, and maintained by (current or former) Andes employees. As explained by Alan Kao, new customers are now all using RISC-V, and all known nds32 users are already on longterm stable kernels provided by Andes, with no development work going into mainline support any more. While the port is still in a reasonably good shape, it only gets worse over time without active maintainers, so it seems best to remove it before it becomes unusable. As always, if it turns out that there are mainline users after all, and they volunteer to maintain the port in the future, the removal can be reverted. Link: https://lore.kernel.org/linux-mm/YhdWNLUhk+x9RAzU@yamatobi.andestech.com/ Link: https://lore.kernel.org/lkml/20220302065213.82702-1-alankao@andestech.com/ Link: https://www.andestech.com/en/products-solutions/andestar-architecture/ Signed-off-by: Alan Kao [arnd: rewrite changelog to provide more background] Signed-off-by: Arnd Bergmann --- arch/nds32/include/asm/ftrace.h | 46 ----------------------------------------- 1 file changed, 46 deletions(-) delete mode 100644 arch/nds32/include/asm/ftrace.h (limited to 'arch/nds32/include/asm/ftrace.h') diff --git a/arch/nds32/include/asm/ftrace.h b/arch/nds32/include/asm/ftrace.h deleted file mode 100644 index 2f96cc96aa35..000000000000 --- a/arch/nds32/include/asm/ftrace.h +++ /dev/null @@ -1,46 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ - -#ifndef __ASM_NDS32_FTRACE_H -#define __ASM_NDS32_FTRACE_H - -#ifdef CONFIG_FUNCTION_TRACER - -#define HAVE_FUNCTION_GRAPH_FP_TEST - -#define MCOUNT_ADDR ((unsigned long)(_mcount)) -/* mcount call is composed of three instructions: - * sethi + ori + jral - */ -#define MCOUNT_INSN_SIZE 12 - -extern void _mcount(unsigned long parent_ip); - -#ifdef CONFIG_DYNAMIC_FTRACE - -#define FTRACE_ADDR ((unsigned long)_ftrace_caller) - -#ifdef __NDS32_EL__ -#define INSN_NOP 0x09000040 -#define INSN_SIZE(insn) (((insn & 0x00000080) == 0) ? 4 : 2) -#define IS_SETHI(insn) ((insn & 0x000000fe) == 0x00000046) -#define ENDIAN_CONVERT(insn) be32_to_cpu(insn) -#else /* __NDS32_EB__ */ -#define INSN_NOP 0x40000009 -#define INSN_SIZE(insn) (((insn & 0x80000000) == 0) ? 4 : 2) -#define IS_SETHI(insn) ((insn & 0xfe000000) == 0x46000000) -#define ENDIAN_CONVERT(insn) (insn) -#endif - -extern void _ftrace_caller(unsigned long parent_ip); -static inline unsigned long ftrace_call_adjust(unsigned long addr) -{ - return addr; -} -struct dyn_arch_ftrace { -}; - -#endif /* CONFIG_DYNAMIC_FTRACE */ - -#endif /* CONFIG_FUNCTION_TRACER */ - -#endif /* __ASM_NDS32_FTRACE_H */ -- cgit v1.2.3