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597 lines
11 KiB
597 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005. |
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*/ |
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%locations |
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%{ |
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#include <stdio.h> |
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#include <inttypes.h> |
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|
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#include "dtc.h" |
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#include "srcpos.h" |
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|
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extern int yylex(void); |
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extern void yyerror(char const *s); |
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#define ERROR(loc, ...) \ |
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do { \ |
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srcpos_error((loc), "Error", __VA_ARGS__); \ |
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treesource_error = true; \ |
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} while (0) |
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#define YYERROR_CALL(msg) yyerror(msg) |
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extern struct dt_info *parser_output; |
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extern bool treesource_error; |
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static bool is_ref_relative(const char *ref) |
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{ |
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return ref[0] != '/' && strchr(&ref[1], '/'); |
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} |
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%} |
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%union { |
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char *propnodename; |
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char *labelref; |
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uint8_t byte; |
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struct data data; |
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struct { |
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struct data data; |
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int bits; |
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} array; |
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struct property *prop; |
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struct property *proplist; |
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struct node *node; |
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struct node *nodelist; |
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struct reserve_info *re; |
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uint64_t integer; |
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unsigned int flags; |
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} |
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%token DT_V1 |
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%token DT_PLUGIN |
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%token DT_MEMRESERVE |
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%token DT_LSHIFT DT_RSHIFT DT_LE DT_GE DT_EQ DT_NE DT_AND DT_OR |
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%token DT_BITS |
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%token DT_DEL_PROP |
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%token DT_DEL_NODE |
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%token DT_OMIT_NO_REF |
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%token <propnodename> DT_PROPNODENAME |
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%token <integer> DT_LITERAL |
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%token <integer> DT_CHAR_LITERAL |
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%token <byte> DT_BYTE |
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%token <data> DT_STRING |
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%token <labelref> DT_LABEL |
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%token <labelref> DT_LABEL_REF |
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%token <labelref> DT_PATH_REF |
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%token DT_INCBIN |
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%type <data> propdata |
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%type <data> propdataprefix |
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%type <flags> header |
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%type <flags> headers |
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%type <re> memreserve |
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%type <re> memreserves |
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%type <array> arrayprefix |
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%type <data> bytestring |
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%type <prop> propdef |
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%type <proplist> proplist |
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%type <labelref> dt_ref |
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%type <node> devicetree |
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%type <node> nodedef |
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%type <node> subnode |
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%type <nodelist> subnodes |
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%type <integer> integer_prim |
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%type <integer> integer_unary |
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%type <integer> integer_mul |
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%type <integer> integer_add |
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%type <integer> integer_shift |
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%type <integer> integer_rela |
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%type <integer> integer_eq |
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%type <integer> integer_bitand |
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%type <integer> integer_bitxor |
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%type <integer> integer_bitor |
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%type <integer> integer_and |
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%type <integer> integer_or |
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%type <integer> integer_trinary |
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%type <integer> integer_expr |
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%% |
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sourcefile: |
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headers memreserves devicetree |
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{ |
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parser_output = build_dt_info($1, $2, $3, |
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guess_boot_cpuid($3)); |
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} |
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; |
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header: |
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DT_V1 ';' |
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{ |
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$$ = DTSF_V1; |
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} |
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| DT_V1 ';' DT_PLUGIN ';' |
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{ |
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$$ = DTSF_V1 | DTSF_PLUGIN; |
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} |
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; |
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headers: |
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header |
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| header headers |
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{ |
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if ($2 != $1) |
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ERROR(&@2, "Header flags don't match earlier ones"); |
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$$ = $1; |
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} |
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; |
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memreserves: |
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/* empty */ |
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{ |
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$$ = NULL; |
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} |
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| memreserve memreserves |
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{ |
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$$ = chain_reserve_entry($1, $2); |
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} |
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; |
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memreserve: |
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DT_MEMRESERVE integer_prim integer_prim ';' |
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{ |
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$$ = build_reserve_entry($2, $3); |
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} |
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| DT_LABEL memreserve |
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{ |
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add_label(&$2->labels, $1); |
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$$ = $2; |
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} |
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; |
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dt_ref: DT_LABEL_REF | DT_PATH_REF; |
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devicetree: |
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'/' nodedef |
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{ |
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$$ = name_node($2, ""); |
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} |
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| devicetree '/' nodedef |
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{ |
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$$ = merge_nodes($1, $3); |
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} |
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| dt_ref nodedef |
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{ |
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/* |
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* We rely on the rule being always: |
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* versioninfo plugindecl memreserves devicetree |
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* so $-1 is what we want (plugindecl) |
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*/ |
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if (!($<flags>-1 & DTSF_PLUGIN)) |
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ERROR(&@2, "Label or path %s not found", $1); |
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else if (is_ref_relative($1)) |
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ERROR(&@2, "Label-relative reference %s not supported in plugin", $1); |
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$$ = add_orphan_node( |
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name_node(build_node(NULL, NULL, NULL), |
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""), |
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$2, $1); |
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} |
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| devicetree DT_LABEL dt_ref nodedef |
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{ |
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struct node *target = get_node_by_ref($1, $3); |
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if (($<flags>-1 & DTSF_PLUGIN) && is_ref_relative($3)) |
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ERROR(&@2, "Label-relative reference %s not supported in plugin", $3); |
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if (target) { |
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add_label(&target->labels, $2); |
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merge_nodes(target, $4); |
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} else |
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ERROR(&@3, "Label or path %s not found", $3); |
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$$ = $1; |
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} |
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| devicetree DT_PATH_REF nodedef |
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{ |
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/* |
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* We rely on the rule being always: |
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* versioninfo plugindecl memreserves devicetree |
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* so $-1 is what we want (plugindecl) |
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*/ |
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if ($<flags>-1 & DTSF_PLUGIN) { |
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if (is_ref_relative($2)) |
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ERROR(&@2, "Label-relative reference %s not supported in plugin", $2); |
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add_orphan_node($1, $3, $2); |
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} else { |
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struct node *target = get_node_by_ref($1, $2); |
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if (target) |
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merge_nodes(target, $3); |
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else |
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ERROR(&@2, "Label or path %s not found", $2); |
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} |
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$$ = $1; |
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} |
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| devicetree DT_LABEL_REF nodedef |
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{ |
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struct node *target = get_node_by_ref($1, $2); |
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if (target) { |
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merge_nodes(target, $3); |
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} else { |
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/* |
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* We rely on the rule being always: |
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* versioninfo plugindecl memreserves devicetree |
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* so $-1 is what we want (plugindecl) |
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*/ |
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if ($<flags>-1 & DTSF_PLUGIN) |
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add_orphan_node($1, $3, $2); |
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else |
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ERROR(&@2, "Label or path %s not found", $2); |
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} |
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$$ = $1; |
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} |
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| devicetree DT_DEL_NODE dt_ref ';' |
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{ |
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struct node *target = get_node_by_ref($1, $3); |
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if (target) |
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delete_node(target); |
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else |
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ERROR(&@3, "Label or path %s not found", $3); |
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$$ = $1; |
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} |
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| devicetree DT_OMIT_NO_REF dt_ref ';' |
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{ |
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struct node *target = get_node_by_ref($1, $3); |
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if (target) |
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omit_node_if_unused(target); |
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else |
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ERROR(&@3, "Label or path %s not found", $3); |
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$$ = $1; |
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} |
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; |
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nodedef: |
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'{' proplist subnodes '}' ';' |
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{ |
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$$ = build_node($2, $3, &@$); |
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} |
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; |
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proplist: |
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/* empty */ |
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{ |
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$$ = NULL; |
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} |
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| proplist propdef |
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{ |
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$$ = chain_property($2, $1); |
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} |
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; |
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propdef: |
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DT_PROPNODENAME '=' propdata ';' |
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{ |
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$$ = build_property($1, $3, &@$); |
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free($1); |
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} |
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| DT_PROPNODENAME ';' |
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{ |
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$$ = build_property($1, empty_data, &@$); |
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free($1); |
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} |
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| DT_DEL_PROP DT_PROPNODENAME ';' |
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{ |
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$$ = build_property_delete($2); |
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free($2); |
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} |
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| DT_LABEL propdef |
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{ |
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add_label(&$2->labels, $1); |
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$$ = $2; |
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} |
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; |
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propdata: |
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propdataprefix DT_STRING |
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{ |
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$$ = data_merge($1, $2); |
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} |
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| propdataprefix arrayprefix '>' |
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{ |
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$$ = data_merge($1, $2.data); |
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} |
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| propdataprefix '[' bytestring ']' |
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{ |
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$$ = data_merge($1, $3); |
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} |
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| propdataprefix dt_ref |
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{ |
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$1 = data_add_marker($1, TYPE_STRING, $2); |
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$$ = data_add_marker($1, REF_PATH, $2); |
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} |
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| propdataprefix DT_INCBIN '(' DT_STRING ',' integer_prim ',' integer_prim ')' |
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{ |
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FILE *f = srcfile_relative_open($4.val, NULL); |
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struct data d; |
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if ($6 != 0) |
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if (fseek(f, $6, SEEK_SET) != 0) |
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die("Couldn't seek to offset %llu in \"%s\": %s", |
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(unsigned long long)$6, $4.val, |
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strerror(errno)); |
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d = data_copy_file(f, $8); |
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$$ = data_merge($1, d); |
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fclose(f); |
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} |
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| propdataprefix DT_INCBIN '(' DT_STRING ')' |
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{ |
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FILE *f = srcfile_relative_open($4.val, NULL); |
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struct data d = empty_data; |
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d = data_copy_file(f, -1); |
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$$ = data_merge($1, d); |
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fclose(f); |
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} |
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| propdata DT_LABEL |
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{ |
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$$ = data_add_marker($1, LABEL, $2); |
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} |
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; |
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propdataprefix: |
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/* empty */ |
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{ |
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$$ = empty_data; |
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} |
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| propdata ',' |
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{ |
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$$ = $1; |
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} |
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| propdataprefix DT_LABEL |
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{ |
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$$ = data_add_marker($1, LABEL, $2); |
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} |
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; |
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arrayprefix: |
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DT_BITS DT_LITERAL '<' |
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{ |
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unsigned long long bits; |
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enum markertype type = TYPE_UINT32; |
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bits = $2; |
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switch (bits) { |
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case 8: type = TYPE_UINT8; break; |
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case 16: type = TYPE_UINT16; break; |
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case 32: type = TYPE_UINT32; break; |
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case 64: type = TYPE_UINT64; break; |
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default: |
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ERROR(&@2, "Array elements must be" |
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" 8, 16, 32 or 64-bits"); |
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bits = 32; |
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} |
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$$.data = data_add_marker(empty_data, type, NULL); |
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$$.bits = bits; |
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} |
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| '<' |
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{ |
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$$.data = data_add_marker(empty_data, TYPE_UINT32, NULL); |
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$$.bits = 32; |
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} |
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| arrayprefix integer_prim |
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{ |
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if ($1.bits < 64) { |
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uint64_t mask = (1ULL << $1.bits) - 1; |
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/* |
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* Bits above mask must either be all zero |
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* (positive within range of mask) or all one |
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* (negative and sign-extended). The second |
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* condition is true if when we set all bits |
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* within the mask to one (i.e. | in the |
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* mask), all bits are one. |
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*/ |
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if (($2 > mask) && (($2 | mask) != -1ULL)) { |
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char *loc = srcpos_string(&@2); |
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fprintf(stderr, |
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"WARNING: %s: Value 0x%016" PRIx64 |
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" truncated to 0x%0*" PRIx64 "\n", |
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loc, $2, $1.bits / 4, ($2 & mask)); |
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free(loc); |
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} |
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} |
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$$.data = data_append_integer($1.data, $2, $1.bits); |
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} |
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| arrayprefix dt_ref |
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{ |
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uint64_t val = ~0ULL >> (64 - $1.bits); |
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if ($1.bits == 32) |
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$1.data = data_add_marker($1.data, |
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REF_PHANDLE, |
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$2); |
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else |
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ERROR(&@2, "References are only allowed in " |
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"arrays with 32-bit elements."); |
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$$.data = data_append_integer($1.data, val, $1.bits); |
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} |
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| arrayprefix DT_LABEL |
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{ |
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$$.data = data_add_marker($1.data, LABEL, $2); |
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} |
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; |
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integer_prim: |
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DT_LITERAL |
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| DT_CHAR_LITERAL |
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| '(' integer_expr ')' |
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{ |
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$$ = $2; |
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} |
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; |
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integer_expr: |
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integer_trinary |
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; |
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integer_trinary: |
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integer_or |
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| integer_or '?' integer_expr ':' integer_trinary { $$ = $1 ? $3 : $5; } |
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; |
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integer_or: |
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integer_and |
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| integer_or DT_OR integer_and { $$ = $1 || $3; } |
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; |
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integer_and: |
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integer_bitor |
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| integer_and DT_AND integer_bitor { $$ = $1 && $3; } |
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; |
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integer_bitor: |
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integer_bitxor |
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| integer_bitor '|' integer_bitxor { $$ = $1 | $3; } |
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; |
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integer_bitxor: |
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integer_bitand |
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| integer_bitxor '^' integer_bitand { $$ = $1 ^ $3; } |
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; |
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integer_bitand: |
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integer_eq |
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| integer_bitand '&' integer_eq { $$ = $1 & $3; } |
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; |
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integer_eq: |
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integer_rela |
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| integer_eq DT_EQ integer_rela { $$ = $1 == $3; } |
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| integer_eq DT_NE integer_rela { $$ = $1 != $3; } |
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; |
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integer_rela: |
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integer_shift |
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| integer_rela '<' integer_shift { $$ = $1 < $3; } |
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| integer_rela '>' integer_shift { $$ = $1 > $3; } |
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| integer_rela DT_LE integer_shift { $$ = $1 <= $3; } |
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| integer_rela DT_GE integer_shift { $$ = $1 >= $3; } |
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; |
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integer_shift: |
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integer_shift DT_LSHIFT integer_add { $$ = ($3 < 64) ? ($1 << $3) : 0; } |
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| integer_shift DT_RSHIFT integer_add { $$ = ($3 < 64) ? ($1 >> $3) : 0; } |
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| integer_add |
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; |
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integer_add: |
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integer_add '+' integer_mul { $$ = $1 + $3; } |
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| integer_add '-' integer_mul { $$ = $1 - $3; } |
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| integer_mul |
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; |
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integer_mul: |
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integer_mul '*' integer_unary { $$ = $1 * $3; } |
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| integer_mul '/' integer_unary |
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{ |
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if ($3 != 0) { |
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$$ = $1 / $3; |
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} else { |
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ERROR(&@$, "Division by zero"); |
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$$ = 0; |
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} |
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} |
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| integer_mul '%' integer_unary |
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{ |
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if ($3 != 0) { |
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$$ = $1 % $3; |
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} else { |
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ERROR(&@$, "Division by zero"); |
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$$ = 0; |
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} |
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} |
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| integer_unary |
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; |
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integer_unary: |
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integer_prim |
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| '-' integer_unary { $$ = -$2; } |
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| '~' integer_unary { $$ = ~$2; } |
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| '!' integer_unary { $$ = !$2; } |
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; |
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bytestring: |
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/* empty */ |
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{ |
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$$ = data_add_marker(empty_data, TYPE_UINT8, NULL); |
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} |
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| bytestring DT_BYTE |
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{ |
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$$ = data_append_byte($1, $2); |
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} |
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| bytestring DT_LABEL |
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{ |
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$$ = data_add_marker($1, LABEL, $2); |
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} |
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; |
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subnodes: |
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/* empty */ |
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{ |
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$$ = NULL; |
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} |
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| subnode subnodes |
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{ |
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$$ = chain_node($1, $2); |
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} |
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| subnode propdef |
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{ |
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ERROR(&@2, "Properties must precede subnodes"); |
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YYERROR; |
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} |
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; |
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subnode: |
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DT_PROPNODENAME nodedef |
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{ |
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$$ = name_node($2, $1); |
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} |
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| DT_DEL_NODE DT_PROPNODENAME ';' |
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{ |
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$$ = name_node(build_node_delete(&@$), $2); |
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} |
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| DT_OMIT_NO_REF subnode |
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{ |
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$$ = omit_node_if_unused($2); |
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} |
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| DT_LABEL subnode |
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{ |
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add_label(&$2->labels, $1); |
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$$ = $2; |
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} |
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; |
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%% |
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|
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void yyerror(char const *s) |
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{ |
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ERROR(&yylloc, "%s", s); |
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}
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