rajamesandClaude Opus 5.5
0f82d8c22a
The ROM's source is F18 code in capsules/v4/rom, assembled off the node by v4/tools/mkrom.c with the memory map's constants from v4/tools/mkmap.c (MACHINE.md 2). main.f18 is the entry table payloads call through (2.1); in.f18 reads the console and splits it into tokens exactly as text.c does, the token held packed as a counted string. The ROM's state is a reserved area of the map (host_map.h ROM_*). text.c gains the constant directive, so the off-node assembler and the ROM speak one language. The map also names (NUMBER)'s state, for the next task. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
93 lines
3.6 KiB
C
93 lines
3.6 KiB
C
/* mkrom.c -- build the ROM, off the node, as a bitstream is built.
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*
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* mkrom OUT.c OUT.sym MAP.f18 SOURCE.f18...
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*
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* docs/v4.0.0/MACHINE.md section 2. The ROM is F18 code, written in the
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* text assembler's notation (include/v4/text.h) in capsules/v4/rom, and this
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* is the only thing built off the node. It assembles MAP.f18 (the memory
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* map's constants, from tools/mkmap.c) and then each SOURCE in the order
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* given, at the ROM's base address, and writes:
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* OUT.c the ROM: const v4_cell v4_rom_<width>[] and its length
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* OUT.sym every word of it, "NAME ADDRESS" a line, for the tests
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*
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* This tool is built with a node whose RAM reaches over the ROM's range
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* (V4_NODE_WORDS = the host's RAM plus its ROM range, V4_ROM_WORDS = 0), so
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* the assembler can lay the ROM down where it will run; ROM_ORIGIN is the
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* host's RAM size, which is where the ROM starts on the machine. The
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* assembler's branch placement depends only on the top of the address space,
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* which is the same either way.
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*/
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#include "v4/text.h"
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#include <stdio.h>
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#include <stdlib.h>
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#ifndef ROM_ORIGIN
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#error "ROM_ORIGIN must be the host node's RAM size"
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#endif
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#ifndef ROM_RANGE
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#error "ROM_RANGE must be the host node's ROM range, in words"
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#endif
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static v4_node n;
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static v4_text tx;
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static void die(const char *what, const char *detail)
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{
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fprintf(stderr, "mkrom: %s%s%s\n", what, detail ? ": " : "", detail ? detail : "");
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exit(1);
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}
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/* a cell as a C constant of the cell's type, with no implementation-defined conversion */
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static void put_cell(FILE *f, v4_cell v)
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{
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#if V4_CELL_BITS == 64
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if (v == (v4_cell)((v4_ucell)1 << 63)) fprintf(f, "(-9223372036854775807LL - 1)");
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else fprintf(f, "%lldLL", (long long)v);
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#else
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if (v == (v4_cell)((v4_ucell)1 << 31)) fprintf(f, "(-2147483647L - 1)");
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else fprintf(f, "%ldL", (long)v);
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#endif
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}
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int main(int argc, char **argv)
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{
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FILE *out;
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v4_cell here, a;
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int i;
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unsigned s;
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if (argc < 5) die("usage: mkrom OUT.c OUT.sym MAP.f18 SOURCE.f18...", NULL);
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if ((v4_ucell)V4_NODE_WORDS != (v4_ucell)ROM_ORIGIN + (v4_ucell)ROM_RANGE)
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die("built with the wrong node size: RAM must reach over the ROM's range", NULL);
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v4_node_reset(&n);
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v4_text_begin(&tx, &n, ROM_ORIGIN);
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for (i = 3; i < argc; i++)
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if (!v4_text_assemble_file(&tx, argv[i])) die("does not assemble", v4_text_error(&tx));
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if (!v4_text_finish(&tx)) die("not everything is defined", v4_text_error(&tx));
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here = v4_text_here(&tx);
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if (here - (v4_cell)ROM_ORIGIN > (v4_cell)ROM_RANGE) die("the ROM is larger than its range", NULL);
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out = fopen(argv[1], "w");
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if (!out) die("cannot write", argv[1]);
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fprintf(out, "/* Generated by v4/tools/mkrom.c from capsules/v4/rom -- do not edit. */\n#include \"v4/cell.h\"\n\n");
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fprintf(out, "const v4_cell v4_rom_%d[] = {\n", V4_CELL_BITS);
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for (a = ROM_ORIGIN; a < here; a++) {
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fprintf(out, " ");
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put_cell(out, n.mem[a]);
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fprintf(out, ",\n");
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}
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if (here == ROM_ORIGIN) fprintf(out, " 0\n");
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fprintf(out, "};\nconst unsigned v4_rom_%d_words = %ldu;\n", V4_CELL_BITS, (long)(here - (v4_cell)ROM_ORIGIN));
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if (fclose(out) != 0) die("cannot write", argv[1]);
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out = fopen(argv[2], "w");
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if (!out) die("cannot write", argv[2]);
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for (s = 0; s < tx.nsym; s++)
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if (tx.sym[s].kind == 1) fprintf(out, "%s %ld\n", tx.pool + tx.sym[s].name, (long)tx.sym[s].value);
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if (fclose(out) != 0) die("cannot write", argv[2]);
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fprintf(stderr, "mkrom: a ROM of %ld words, %d-bit cells -> %s\n", (long)(here - (v4_cell)ROM_ORIGIN), V4_CELL_BITS, argv[1]);
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return 0;
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}
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