From 8cace3f05003c6cb4d38c36890055f03151c2ad4 Mon Sep 17 00:00:00 2001 From: Richard Qin Date: Fri, 16 Oct 2026 02:39:56 +0800 Subject: Remove old code Signed-off-by: Richard Qin --- arch/riscv/include/asm/pgtable.h | 55 ---------------------------------------- 1 file changed, 55 deletions(-) delete mode 100644 arch/riscv/include/asm/pgtable.h (limited to 'arch/riscv/include/asm/pgtable.h') diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h deleted file mode 100644 index 28fc4c5..0000000 --- a/arch/riscv/include/asm/pgtable.h +++ /dev/null @@ -1,55 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* Copyright (C) 2026 Richard Qin */ - -#ifndef _ASM_RISCV_PGTABLE_H -#define _ASM_RISCV_PGTABLE_H - -/* - * Early page-table construction API used by arch/riscv/mm/init.cc::setup_vm. - * - * Mirrors the create_pgd_mapping interface from Linux's - * arch/riscv/mm/init.c — same name, same semantics: - * - * create_pgd_mapping(pgdir, va, pa, sz, prot) - * - * pgdir : root of the page table to populate - * va : virtual address to map - * pa : physical address to map to - * sz : mapping size — must be a supported leaf size (PAGE_SIZE, - * 2 MiB megapage, or 1 GiB gigapage) - * prot : PTE flag bits (PAGE_KERNEL_EXEC etc., from ) - * - * The boot-time variant in this file only supports gigapage (1 GiB) - * mappings — that is all setup_vm needs for the early_pg_dir / trampoline_pg_dir - * built before the slab allocator exists. Finer-grained mappings come - * later via vmm_init(). - */ - -#include -#include - -#ifdef __cplusplus -extern "C" { -#endif - -typedef struct { unsigned long pgd; } pgd_t; - -/* Linker-provided early page-table storage (defined in lumeos.lds.S - * ARCH_BSS_EXTRA, lives in .bss so it's zero-initialized). Allocating - * them in the linker script — not in C — mirrors Linux and keeps the - * symbols visible from head.S without a forward C decl mismatch. */ -extern pgd_t early_pg_dir[PTRS_PER_PGD]; -extern pgd_t trampoline_pg_dir[PTRS_PER_PGD]; -extern pgd_t fixmap_pg_dir[PTRS_PER_PGD]; - -/* Install a single PGD entry mapping `va` → `pa` with size `sz` and PTE - * flags `prot`. Only sz == PGDIR_SIZE (1 GiB) is supported in this early - * variant — vmm_init() takes over with create_pgd_mapping_pmd later. */ -void create_pgd_mapping(pgd_t *pgdir, unsigned long va, unsigned long pa, - unsigned long sz, unsigned long prot); - -#ifdef __cplusplus -} -#endif - -#endif /* _ASM_RISCV_PGTABLE_H */ -- cgit v1.2.3