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/kernel/module.c | 278 --------------------------------------------- 1 file changed, 278 deletions(-) delete mode 100644 arch/nds32/kernel/module.c (limited to 'arch/nds32/kernel/module.c') diff --git a/arch/nds32/kernel/module.c b/arch/nds32/kernel/module.c deleted file mode 100644 index 3897fd14a21d..000000000000 --- a/arch/nds32/kernel/module.c +++ /dev/null @@ -1,278 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// Copyright (C) 2005-2017 Andes Technology Corporation - -#include -#include -#include -#include -#include - -void *module_alloc(unsigned long size) -{ - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, - GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE, - __builtin_return_address(0)); -} - -void module_free(struct module *module, void *region) -{ - vfree(region); -} - -int module_frob_arch_sections(Elf_Ehdr * hdr, - Elf_Shdr * sechdrs, - char *secstrings, struct module *mod) -{ - return 0; -} - -void do_reloc16(unsigned int val, unsigned int *loc, unsigned int val_mask, - unsigned int val_shift, unsigned int loc_mask, - unsigned int partial_in_place, unsigned int swap) -{ - unsigned int tmp = 0, tmp2 = 0; - - __asm__ __volatile__("\tlhi.bi\t%0, [%2], 0\n" - "\tbeqz\t%3, 1f\n" - "\twsbh\t%0, %1\n" - "1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap) - ); - - tmp2 = tmp & loc_mask; - if (partial_in_place) { - tmp &= (~loc_mask); - tmp = - tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask); - } else { - tmp = tmp2 | ((val & val_mask) >> val_shift); - } - - __asm__ __volatile__("\tbeqz\t%3, 2f\n" - "\twsbh\t%0, %1\n" - "2:\n" - "\tshi.bi\t%0, [%2], 0\n":"=r"(tmp):"0"(tmp), - "r"(loc), "r"(swap) - ); -} - -void do_reloc32(unsigned int val, unsigned int *loc, unsigned int val_mask, - unsigned int val_shift, unsigned int loc_mask, - unsigned int partial_in_place, unsigned int swap) -{ - unsigned int tmp = 0, tmp2 = 0; - - __asm__ __volatile__("\tlmw.bi\t%0, [%2], %0, 0\n" - "\tbeqz\t%3, 1f\n" - "\twsbh\t%0, %1\n" - "\trotri\t%0, %1, 16\n" - "1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap) - ); - - tmp2 = tmp & loc_mask; - if (partial_in_place) { - tmp &= (~loc_mask); - tmp = - tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask); - } else { - tmp = tmp2 | ((val & val_mask) >> val_shift); - } - - __asm__ __volatile__("\tbeqz\t%3, 2f\n" - "\twsbh\t%0, %1\n" - "\trotri\t%0, %1, 16\n" - "2:\n" - "\tsmw.bi\t%0, [%2], %0, 0\n":"=r"(tmp):"0"(tmp), - "r"(loc), "r"(swap) - ); -} - -static inline int exceed_limit(int offset, unsigned int val_mask, - struct module *module, Elf32_Rela * rel, - unsigned int relindex, unsigned int reloc_order) -{ - int abs_off = offset < 0 ? ~offset : offset; - - if (abs_off & (~val_mask)) { - pr_err("\n%s: relocation type %d out of range.\n" - "please rebuild the kernel module with gcc option \"-Wa,-mno-small-text\".\n", - module->name, ELF32_R_TYPE(rel->r_info)); - pr_err("section %d reloc %d offset 0x%x relative 0x%x.\n", - relindex, reloc_order, rel->r_offset, offset); - return true; - } - return false; -} - -#ifdef __NDS32_EL__ -#define NEED_SWAP 1 -#else -#define NEED_SWAP 0 -#endif - -int -apply_relocate_add(Elf32_Shdr * sechdrs, const char *strtab, - unsigned int symindex, unsigned int relindex, - struct module *module) -{ - Elf32_Shdr *symsec = sechdrs + symindex; - Elf32_Shdr *relsec = sechdrs + relindex; - Elf32_Shdr *dstsec = sechdrs + relsec->sh_info; - Elf32_Rela *rel = (void *)relsec->sh_addr; - unsigned int i; - - for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rela); i++, rel++) { - Elf32_Addr *loc; - Elf32_Sym *sym; - Elf32_Addr v; - s32 offset; - - offset = ELF32_R_SYM(rel->r_info); - if (offset < 0 - || offset > (symsec->sh_size / sizeof(Elf32_Sym))) { - pr_err("%s: bad relocation\n", module->name); - pr_err("section %d reloc %d\n", relindex, i); - return -ENOEXEC; - } - - sym = ((Elf32_Sym *) symsec->sh_addr) + offset; - - if (rel->r_offset < 0 - || rel->r_offset > dstsec->sh_size - sizeof(u16)) { - pr_err("%s: out of bounds relocation\n", module->name); - pr_err("section %d reloc %d offset 0x%0x size %d\n", - relindex, i, rel->r_offset, dstsec->sh_size); - return -ENOEXEC; - } - - loc = (Elf32_Addr *) (dstsec->sh_addr + rel->r_offset); - v = sym->st_value + rel->r_addend; - - switch (ELF32_R_TYPE(rel->r_info)) { - case R_NDS32_NONE: - case R_NDS32_INSN16: - case R_NDS32_LABEL: - case R_NDS32_LONGCALL1: - case R_NDS32_LONGCALL2: - case R_NDS32_LONGCALL3: - case R_NDS32_LONGCALL4: - case R_NDS32_LONGJUMP1: - case R_NDS32_LONGJUMP2: - case R_NDS32_LONGJUMP3: - case R_NDS32_9_FIXED_RELA: - case R_NDS32_15_FIXED_RELA: - case R_NDS32_17_FIXED_RELA: - case R_NDS32_25_FIXED_RELA: - case R_NDS32_LOADSTORE: - case R_NDS32_DWARF2_OP1_RELA: - case R_NDS32_DWARF2_OP2_RELA: - case R_NDS32_DWARF2_LEB_RELA: - case R_NDS32_RELA_NOP_MIX ... R_NDS32_RELA_NOP_MAX: - break; - - case R_NDS32_32_RELA: - do_reloc32(v, loc, 0xffffffff, 0, 0, 0, 0); - break; - - case R_NDS32_HI20_RELA: - do_reloc32(v, loc, 0xfffff000, 12, 0xfff00000, 0, - NEED_SWAP); - break; - - case R_NDS32_LO12S3_RELA: - do_reloc32(v, loc, 0x00000fff, 3, 0xfffff000, 0, - NEED_SWAP); - break; - - case R_NDS32_LO12S2_RELA: - do_reloc32(v, loc, 0x00000fff, 2, 0xfffff000, 0, - NEED_SWAP); - break; - - case R_NDS32_LO12S1_RELA: - do_reloc32(v, loc, 0x00000fff, 1, 0xfffff000, 0, - NEED_SWAP); - break; - - case R_NDS32_LO12S0_RELA: - case R_NDS32_LO12S0_ORI_RELA: - do_reloc32(v, loc, 0x00000fff, 0, 0xfffff000, 0, - NEED_SWAP); - break; - - case R_NDS32_9_PCREL_RELA: - if (exceed_limit - ((v - (Elf32_Addr) loc), 0x000000ff, module, rel, - relindex, i)) - return -ENOEXEC; - do_reloc16(v - (Elf32_Addr) loc, loc, 0x000001ff, 1, - 0xffffff00, 0, NEED_SWAP); - break; - - case R_NDS32_15_PCREL_RELA: - if (exceed_limit - ((v - (Elf32_Addr) loc), 0x00003fff, module, rel, - relindex, i)) - return -ENOEXEC; - do_reloc32(v - (Elf32_Addr) loc, loc, 0x00007fff, 1, - 0xffffc000, 0, NEED_SWAP); - break; - - case R_NDS32_17_PCREL_RELA: - if (exceed_limit - ((v - (Elf32_Addr) loc), 0x0000ffff, module, rel, - relindex, i)) - return -ENOEXEC; - do_reloc32(v - (Elf32_Addr) loc, loc, 0x0001ffff, 1, - 0xffff0000, 0, NEED_SWAP); - break; - - case R_NDS32_25_PCREL_RELA: - if (exceed_limit - ((v - (Elf32_Addr) loc), 0x00ffffff, module, rel, - relindex, i)) - return -ENOEXEC; - do_reloc32(v - (Elf32_Addr) loc, loc, 0x01ffffff, 1, - 0xff000000, 0, NEED_SWAP); - break; - case R_NDS32_WORD_9_PCREL_RELA: - if (exceed_limit - ((v - (Elf32_Addr) loc), 0x000000ff, module, rel, - relindex, i)) - return -ENOEXEC; - do_reloc32(v - (Elf32_Addr) loc, loc, 0x000001ff, 1, - 0xffffff00, 0, NEED_SWAP); - break; - - case R_NDS32_SDA15S3_RELA: - case R_NDS32_SDA15S2_RELA: - case R_NDS32_SDA15S1_RELA: - case R_NDS32_SDA15S0_RELA: - pr_err("%s: unsupported relocation type %d.\n", - module->name, ELF32_R_TYPE(rel->r_info)); - pr_err - ("Small data section access doesn't work in the kernel space; " - "please rebuild the kernel module with gcc option -mcmodel=large.\n"); - pr_err("section %d reloc %d offset 0x%x size %d\n", - relindex, i, rel->r_offset, dstsec->sh_size); - break; - - default: - pr_err("%s: unsupported relocation type %d.\n", - module->name, ELF32_R_TYPE(rel->r_info)); - pr_err("section %d reloc %d offset 0x%x size %d\n", - relindex, i, rel->r_offset, dstsec->sh_size); - } - } - return 0; -} - -int -module_finalize(const Elf32_Ehdr * hdr, const Elf_Shdr * sechdrs, - struct module *module) -{ - return 0; -} - -void module_arch_cleanup(struct module *mod) -{ -} -- cgit v1.2.3