From 9fffb55f66127b52c937ede5196ebfa0c0d50bce Mon Sep 17 00:00:00 2001 From: David Gibson Date: Thu, 30 Apr 2009 15:25:53 +1000 Subject: Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtc The powerpc kernel always requires an Open Firmware like device tree to supply device information. On systems without OF, this comes from a flattened device tree blob. This blob is usually generated by dtc, a tool which compiles a text description of the device tree into the flattened format used by the kernel. Sometimes, the bootwrapper makes small changes to the pre-compiled device tree blob (e.g. filling in the size of RAM). To do this it uses the libfdt library. Because these are only used on powerpc, the code for both these tools is included under arch/powerpc/boot (these were imported and are periodically updated from the upstream dtc tree). However, the microblaze architecture, currently being prepared for merging to mainline also uses dtc to produce device tree blobs. A few other archs have also mentioned some interest in using dtc. Therefore, this patch moves dtc and libfdt from arch/powerpc into scripts, where it can be used by any architecture. The vast bulk of this patch is a literal move, the rest is adjusting the various Makefiles to use dtc and libfdt correctly from their new locations. Signed-off-by: David Gibson Signed-off-by: Linus Torvalds --- scripts/dtc/dtc-parser.y | 379 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 379 insertions(+) create mode 100644 scripts/dtc/dtc-parser.y (limited to 'scripts/dtc/dtc-parser.y') diff --git a/scripts/dtc/dtc-parser.y b/scripts/dtc/dtc-parser.y new file mode 100644 index 000000000000..b2ab562420ea --- /dev/null +++ b/scripts/dtc/dtc-parser.y @@ -0,0 +1,379 @@ +/* + * (C) Copyright David Gibson , IBM Corporation. 2005. + * + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + */ + +%locations + +%{ +#include + +#include "dtc.h" +#include "srcpos.h" + +extern int yylex(void); + +extern struct boot_info *the_boot_info; +extern int treesource_error; + +static unsigned long long eval_literal(const char *s, int base, int bits); +%} + +%union { + char *propnodename; + char *literal; + char *labelref; + unsigned int cbase; + uint8_t byte; + struct data data; + + uint64_t addr; + cell_t cell; + struct property *prop; + struct property *proplist; + struct node *node; + struct node *nodelist; + struct reserve_info *re; +} + +%token DT_V1 +%token DT_MEMRESERVE +%token DT_PROPNODENAME +%token DT_LITERAL +%token DT_LEGACYLITERAL +%token DT_BASE +%token DT_BYTE +%token DT_STRING +%token DT_LABEL +%token DT_REF +%token DT_INCBIN + +%type propdata +%type propdataprefix +%type memreserve +%type memreserves +%type v0_memreserve +%type v0_memreserves +%type addr +%type celllist +%type cellbase +%type cellval +%type bytestring +%type propdef +%type proplist + +%type devicetree +%type nodedef +%type subnode +%type subnodes +%type label + +%% + +sourcefile: + DT_V1 ';' memreserves devicetree + { + the_boot_info = build_boot_info($3, $4, 0); + } + | v0_memreserves devicetree + { + the_boot_info = build_boot_info($1, $2, 0); + } + ; + +memreserves: + /* empty */ + { + $$ = NULL; + } + | memreserve memreserves + { + $$ = chain_reserve_entry($1, $2); + } + ; + +memreserve: + label DT_MEMRESERVE addr addr ';' + { + $$ = build_reserve_entry($3, $4, $1); + } + ; + +v0_memreserves: + /* empty */ + { + $$ = NULL; + } + | v0_memreserve v0_memreserves + { + $$ = chain_reserve_entry($1, $2); + }; + ; + +v0_memreserve: + memreserve + { + $$ = $1; + } + | label DT_MEMRESERVE addr '-' addr ';' + { + $$ = build_reserve_entry($3, $5 - $3 + 1, $1); + } + ; + +addr: + DT_LITERAL + { + $$ = eval_literal($1, 0, 64); + } + | DT_LEGACYLITERAL + { + $$ = eval_literal($1, 16, 64); + } + ; + +devicetree: + '/' nodedef + { + $$ = name_node($2, "", NULL); + } + ; + +nodedef: + '{' proplist subnodes '}' ';' + { + $$ = build_node($2, $3); + } + ; + +proplist: + /* empty */ + { + $$ = NULL; + } + | proplist propdef + { + $$ = chain_property($2, $1); + } + ; + +propdef: + label DT_PROPNODENAME '=' propdata ';' + { + $$ = build_property($2, $4, $1); + } + | label DT_PROPNODENAME ';' + { + $$ = build_property($2, empty_data, $1); + } + ; + +propdata: + propdataprefix DT_STRING + { + $$ = data_merge($1, $2); + } + | propdataprefix '<' celllist '>' + { + $$ = data_merge($1, $3); + } + | propdataprefix '[' bytestring ']' + { + $$ = data_merge($1, $3); + } + | propdataprefix DT_REF + { + $$ = data_add_marker($1, REF_PATH, $2); + } + | propdataprefix DT_INCBIN '(' DT_STRING ',' addr ',' addr ')' + { + struct search_path path = { srcpos_file->dir, NULL, NULL }; + struct dtc_file *file = dtc_open_file($4.val, &path); + struct data d = empty_data; + + if ($6 != 0) + if (fseek(file->file, $6, SEEK_SET) != 0) + yyerrorf("Couldn't seek to offset %llu in \"%s\": %s", + (unsigned long long)$6, + $4.val, strerror(errno)); + + d = data_copy_file(file->file, $8); + + $$ = data_merge($1, d); + dtc_close_file(file); + } + | propdataprefix DT_INCBIN '(' DT_STRING ')' + { + struct search_path path = { srcpos_file->dir, NULL, NULL }; + struct dtc_file *file = dtc_open_file($4.val, &path); + struct data d = empty_data; + + d = data_copy_file(file->file, -1); + + $$ = data_merge($1, d); + dtc_close_file(file); + } + | propdata DT_LABEL + { + $$ = data_add_marker($1, LABEL, $2); + } + ; + +propdataprefix: + /* empty */ + { + $$ = empty_data; + } + | propdata ',' + { + $$ = $1; + } + | propdataprefix DT_LABEL + { + $$ = data_add_marker($1, LABEL, $2); + } + ; + +celllist: + /* empty */ + { + $$ = empty_data; + } + | celllist cellval + { + $$ = data_append_cell($1, $2); + } + | celllist DT_REF + { + $$ = data_append_cell(data_add_marker($1, REF_PHANDLE, + $2), -1); + } + | celllist DT_LABEL + { + $$ = data_add_marker($1, LABEL, $2); + } + ; + +cellbase: + /* empty */ + { + $$ = 16; + } + | DT_BASE + ; + +cellval: + DT_LITERAL + { + $$ = eval_literal($1, 0, 32); + } + | cellbase DT_LEGACYLITERAL + { + $$ = eval_literal($2, $1, 32); + } + ; + +bytestring: + /* empty */ + { + $$ = empty_data; + } + | bytestring DT_BYTE + { + $$ = data_append_byte($1, $2); + } + | bytestring DT_LABEL + { + $$ = data_add_marker($1, LABEL, $2); + } + ; + +subnodes: + /* empty */ + { + $$ = NULL; + } + | subnode subnodes + { + $$ = chain_node($1, $2); + } + | subnode propdef + { + yyerror("syntax error: properties must precede subnodes"); + YYERROR; + } + ; + +subnode: + label DT_PROPNODENAME nodedef + { + $$ = name_node($3, $2, $1); + } + ; + +label: + /* empty */ + { + $$ = NULL; + } + | DT_LABEL + { + $$ = $1; + } + ; + +%% + +void yyerrorf(char const *s, ...) +{ + const char *fname = srcpos_file ? srcpos_file->name : ""; + va_list va; + va_start(va, s); + + if (strcmp(fname, "-") == 0) + fname = "stdin"; + + fprintf(stderr, "%s:%d ", fname, yylloc.first_line); + vfprintf(stderr, s, va); + fprintf(stderr, "\n"); + + treesource_error = 1; + va_end(va); +} + +void yyerror (char const *s) +{ + yyerrorf("%s", s); +} + +static unsigned long long eval_literal(const char *s, int base, int bits) +{ + unsigned long long val; + char *e; + + errno = 0; + val = strtoull(s, &e, base); + if (*e) + yyerror("bad characters in literal"); + else if ((errno == ERANGE) + || ((bits < 64) && (val >= (1ULL << bits)))) + yyerror("literal out of range"); + else if (errno != 0) + yyerror("bad literal"); + return val; +} -- cgit v1.2.3-59-g8ed1b