Remove old code

Signed-off-by: Richard Qin <richard.qin.x@gmail.com>

4 files changed, 0 insertions, 204 deletions

diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
deleted file mode 100644
index 42f1eb4..0000000
--- a/arch/riscv/include/asm/csr.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-#ifndef _ASM_RISCV_CSR_H
-#define _ASM_RISCV_CSR_H
-
-/*
- * RISC-V CSR (Control & Status Register) definitions used by the early
- * boot / MMU-switch path.
- *
- * LumeOS-native subset of Linux arch/riscv/include/asm/csr.h.  Only the
- * symbols head.S and mm/init.cc actually reference are defined — adding
- * the rest is straightforward when new code needs them, and skipping the
- * Linux ALTERNATIVE / vendor-extension machinery keeps the cascade flat.
- */
-
-/* SATP (Supervisor Address Translation and Protection) layout — RV64 */
-#define SATP_PPN_MASK    0x00000FFFFFFFFFFFUL   /* bits [43:0] = root PPN */
-#define SATP_ASID_SHIFT  44
-#define SATP_MODE_SHIFT  60
-
-/* SATP MODE encodings (RV64) */
-#define SATP_MODE_BARE   (0UL << SATP_MODE_SHIFT)
-#define SATP_MODE_SV39   (8UL << SATP_MODE_SHIFT)
-#define SATP_MODE_SV48   (9UL << SATP_MODE_SHIFT)
-
-/* Compose a SATP value from a page-table physical address.
- * Result: MODE | (root_ppn) where root_ppn = pgd_pa >> PAGE_SHIFT. */
-#define MAKE_SATP(mode, pgd_pa)  ((mode) | (((pgd_pa) >> 12) & SATP_PPN_MASK))
-
-/* SSTATUS bits we touch at boot — disable FP / vector at entry so that an
- * accidental FP / V instruction in early code traps cleanly rather than
- * silently using dirty state from before reset. */
-#define SR_FS_OFF        (0UL << 13)
-#define SR_VS_OFF        (0UL << 9)
-
-#endif /* _ASM_RISCV_CSR_H */
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
deleted file mode 100644
index 7b9f155..0000000
--- a/arch/riscv/include/asm/page.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-#ifndef _ASM_RISCV_PAGE_H
-#define _ASM_RISCV_PAGE_H
-
-/*
- * RISC-V page / virtual-memory layout constants.
- *
- * Mirrors the subset of Linux arch/riscv/include/asm/page.h that LumeOS's
- * early boot path needs:
- *   - PAGE_SIZE / PAGE_SHIFT / PAGE_MASK
- *   - PAGE_OFFSET (start of the higher-half direct map)
- *   - KERNEL_LINK_ADDR (link-time VA of _start)
- *   - SV39 PTE flag bits
- *   - PTRS_PER_PGD (512 for SV39)
- *
- * Values match Linux RISC-V SV39 defaults so that struct kernel_mapping
- * (filled by setup_vm in arch/riscv/mm/init.cc) carries the same numeric
- * relations Linux's mm/init.c maintains.
- */
-
-#define PAGE_SHIFT      12
-#define PAGE_SIZE       (1UL << PAGE_SHIFT)
-#define PAGE_MASK       (~(PAGE_SIZE - 1))
-
-/* Higher-half base of the kernel direct map.  Bottom of the SV39 supervisor
- * address space minus the unmapped guard region.  Identical to Linux's
- * CONFIG_PAGE_OFFSET default on RV64. */
-#define PAGE_OFFSET     0xFFFFFFC000000000UL
-
-/* Where _start was linked.  OpenSBI hands control to PHYS_BASE; the kernel
- * runs at KERNEL_LINK_ADDR after relocate_enable_mmu jumps to higher-half. */
-#define PHYS_BASE       0x80200000UL
-#define KERNEL_LINK_ADDR 0xFFFFFFC080200000UL
-
-/* SATP mode field — SV39 = 8, shifted to bits [63:60]. */
-#define SATP_MODE_SV39  (8UL << 60)
-
-#define PTRS_PER_PGD    512
-
-/* 1 GB superpage size — entry.S used to build the early page table with
- * these; setup_vm in arch/riscv/mm/init.cc now does the same. */
-#define PGDIR_SHIFT     30
-#define PGDIR_SIZE      (1UL << PGDIR_SHIFT)
-#define PGDIR_MASK      (~(PGDIR_SIZE - 1))
-
-/* SV39 PTE flag bits (one byte). */
-#define _PAGE_PRESENT   (1UL << 0)  /* aka VALID — historic Linux name */
-#define _PAGE_READ      (1UL << 1)
-#define _PAGE_WRITE     (1UL << 2)
-#define _PAGE_EXEC      (1UL << 3)
-#define _PAGE_USER      (1UL << 4)
-#define _PAGE_GLOBAL    (1UL << 5)
-#define _PAGE_ACCESSED  (1UL << 6)
-#define _PAGE_DIRTY     (1UL << 7)
-
-#define PAGE_KERNEL_EXEC \
-        (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | _PAGE_EXEC | \
-         _PAGE_ACCESSED | _PAGE_DIRTY)
-
-#endif /* _ASM_RISCV_PAGE_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 <asm/page.h>)
- *
- * 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 <lume/types.h>
-#include <asm/page.h>
-
-#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 */
diff --git a/arch/riscv/include/asm/sections.h b/arch/riscv/include/asm/sections.h
deleted file mode 100644
index 7067444..0000000
--- a/arch/riscv/include/asm/sections.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-#ifndef _ASM_RISCV_SECTIONS_H
-#define _ASM_RISCV_SECTIONS_H
-
-/*
- * Linker-emitted symbols that bracket each section of the kernel image.
- *
- * The lumeos.lds.S linker script defines these as the start / end
- * addresses of contiguous regions.  Code that walks a section
- * (relocate_kernel walks .rela.dyn, the C++ ctor loop walks
- * .init_array, the VMM mapping code walks .text vs .rodata, ...)
- * imports the pair via this header.
- *
- * Mirrors Linux arch/riscv/include/asm/sections.h / asm-generic/sections.h.
- * Each name and pair is identical to Linux so that direct ports of mm/init.c
- * relocate_kernel logic compile unchanged against LumeOS.
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-extern char _start[];
-extern char _kernel_end[];
-
-extern char _stext[];
-extern char _etext[];
-extern char _srodata[];
-extern char _erodata[];
-extern char _sdata[];
-extern char _edata[];
-extern char _sbss[];
-extern char _ebss[];
-
-extern char __init_array_start[];
-extern char __init_array_end[];
-
-/* .rela.dyn — array of Elf64_Rela entries emitted by the linker under
- * `-shared -Bsymbolic`.  relocate_kernel walks this range and patches
- * each R_RISCV_RELATIVE slot. */
-extern char __rela_dyn_start[];
-extern char __rela_dyn_end[];
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _ASM_RISCV_SECTIONS_H */