rajamesandJunie
a8b70e88d3
Source tree reorganization: - Move StarForth v3 engine to v3/ (src/, include/, Makefile) - Move kernel to kernel/ (src/, include/, linker/, Makefile) - Create v4/ skeleton for F18-ISA golden model (DECOMPOSITION.md, JUSTIFICATION.md) - Move FABRIC-0..4.md to docs/fabric/ - Move ONTOLOGY.md and ROADMAP.md to docs/ Board infrastructure: - Add boards/ser5/, boards/raspi/, boards/milkv/, boards/zynq7020/ - Each board has board.mk (ISA, CPU flags, boot recipe) and README.md - Root Makefile becomes thin dispatcher: boot_image, all, clean, docs take TARGET - make boot_image TARGET=SER5|RASPI|MILKV builds one GPT/MBR image per board - ZYNQ7020 target exists but stops with clear error (ARMv7 port not built yet) - scripts/mkdiskimage.sh builds disk images for all boards Docs pipeline: - docs/book/ with LaTeX master (main.tex) and Makefile - pandoc converts Markdown to LaTeX at build time - Two Lua filters: table-widths.lua (wide tables wrap), code-breaks.lua (inline code breaks) - make docs builds single PDF (754 pages, 0 missing characters) - make docs TARGET=<board> adds board appendix - build/docs/<book|board>/meta.tex stamps git commit into PDF Bug fixes: - 42 include paths that only worked by accident now use correct relative paths - clang-18 hardcode replaced with configurable CC variable (fixed aarch64 build) - Pi 5: kernel_2712.img linked at 0x80000, .bss zeroed, memory reserved - Doxyfile, .clang-tidy, README.md, Kconfig paths updated Verified: - Hosted v3 build passes 1012 tests, 0 failures - SER5 image boots in QEMU (OVMF), POST passes, K exact (65536 = Q48_ONE) - Milk-V image boots in QEMU (OpenSBI + U-Boot + bootefi), POST passes - make clean TARGET=<board> removes only that board and its ISA objects - make all builds all boards, hosted v3, and docs in one run Co-authored-by: Junie <junie@jetbrains.com>
97 lines
3.5 KiB
C
97 lines
3.5 KiB
C
/*
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* arena.h - VM arena management for StarKernel builds.
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*
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* Hosted builds never include this header. Kernel integration layers use it
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* to provision the PMM-backed VM arena before handing memory to the VM core.
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*/
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#ifndef STARKERNEL_VM_ARENA_H
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#define STARKERNEL_VM_ARENA_H
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#ifdef __STARKERNEL__
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#include <stddef.h>
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#include <stdint.h>
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uint64_t sk_vm_arena_alloc(void);
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void sk_vm_arena_free(void);
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uint8_t *sk_vm_arena_ptr(void);
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size_t sk_vm_arena_size(void);
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int sk_vm_arena_is_initialized(void);
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void sk_vm_arena_assert_guards(const char *tag);
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/**
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* sk_vm_native_stack_t - one VM's own dedicated native (C) stack.
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*
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* FABRIC-3.md §XXVIII (Stage 1, preemptive-context-switch per-VM native
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* stacks, 2026-09-13). Unlike sk_vm_arena_alloc() -- whose PMM+guard-page
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* path is exercised only for Hera; every baby VM's "arena" is actually a
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* plain kmalloc block, per host_services.c's kernel_alloc() -- every native
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* stack, for every VM without exception, gets its own real, independent
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* pmm_alloc_contiguous() allocation with guard pages. A stack overflow is
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* exactly the failure mode guard pages exist for, and unlike the dictionary
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* arena, a corrupted stack can also corrupt whatever saved context Stage 2
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* later trusts -- worth the extra PMM pages every VM, not just Hera.
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*
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* Caller owns this struct (stored directly on the VM, mirroring how
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* vm->memory already holds its own arena pointer directly rather than going
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* through any module-level registry) and passes it back unchanged to
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* sk_vm_native_stack_free().
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*/
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typedef struct {
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uint64_t paddr; /* physical base (for pmm_free_contiguous) */
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uint64_t guard_vaddr; /* virtual base of the whole guarded region */
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uint64_t stack_top; /* initial SP value -- stacks grow down on all
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* 3 arches, so this is guard_vaddr + one guard
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* page + the full stack size */
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} sk_vm_native_stack_t;
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int sk_vm_native_stack_alloc(sk_vm_native_stack_t *out);
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void sk_vm_native_stack_free(const sk_vm_native_stack_t *stack);
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#endif /* __STARKERNEL__ */
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#endif /* STARKERNEL_VM_ARENA_H */
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