diff --git a/alarm/dtc-overlay/PKGBUILD b/alarm/dtc-overlay/PKGBUILD new file mode 100644 index 000000000..b90de7d8b --- /dev/null +++ b/alarm/dtc-overlay/PKGBUILD @@ -0,0 +1,32 @@ +# Maintainer: Stefan Agner <stefan@agner.ch> + +pkgname=dtc-overlay +_gitname=dtc +pkgver=1.4.0 +pkgrel=1 +pkgdesc="Device Tree Compiler with device tree overlay (Symbols and Fixup) support" +url="http://jdl.com/software/" +conflicts=('dtc', 'dtc-git') +arch=('armv7h') +license=('GPL2') +source=('git+http://jdl.com/software/dtc.git#tag=v1.4.0' + 'dtc-dynamic-symbols-fixup-support.patch') +md5sums=('SKIP' + '6f0baf8509b56755643e9d62d94ec7bf') + +prepare() { + cd ${_gitname} + git am ${srcdir}/dtc-dynamic-symbols-fixup-support.patch +} + +build() { + cd ${_gitname} + make || return 1 +} + +package() { + cd ${_gitname} + + make INSTALL=$(which install) DESTDIR=${pkgdir} PREFIX=/usr install || return 1 +} + diff --git a/alarm/dtc-overlay/dtc-dynamic-symbols-fixup-support.patch b/alarm/dtc-overlay/dtc-dynamic-symbols-fixup-support.patch new file mode 100644 index 000000000..351158da1 --- /dev/null +++ b/alarm/dtc-overlay/dtc-dynamic-symbols-fixup-support.patch @@ -0,0 +1,578 @@ +From 61c5cdfd8e611d3a34497394098555b0b8644a31 Mon Sep 17 00:00:00 2001 +From: Pantelis Antoniou <panto@antoniou-consulting.com> +Date: Fri, 4 Jan 2013 21:16:21 +0200 +Subject: [PATCH] dtc: Dynamic symbols & fixup support + +Enable the generation of symbol & fixup information for +usage with dynamic DT loading. + +Passing the -@ option generates a __symbols__ node at the +root node of the resulting blob for any node labels used. + +When using the /plugin/ tag all unresolved label references +be tracked in the __fixups__ node, while all local phandle +references will the tracked in the __local_fixups__ node. + +This is sufficient to implement a dynamic DT object loader. + +Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com> +Signed-off-by: Stefan Agner <stefan@agner.ch> +--- + Documentation/dts-format.txt | 7 +++ + Documentation/manual.txt | 8 +++ + checks.c | 120 +++++++++++++++++++++++++++++++++++-- + dtc-lexer.l | 5 ++ + dtc-parser.y | 23 ++++++- + dtc.c | 9 ++- + dtc.h | 38 ++++++++++++ + flattree.c | 139 +++++++++++++++++++++++++++++++++++++++++++ + 8 files changed, 340 insertions(+), 9 deletions(-) + +diff --git a/Documentation/dts-format.txt b/Documentation/dts-format.txt +index 41741df..4da515c 100644 +--- a/Documentation/dts-format.txt ++++ b/Documentation/dts-format.txt +@@ -115,7 +115,14 @@ Version 1 DTS files have the overall layout: + + * C style (/* ... */) and C++ style (// ...) comments are supported. + ++Device Tree Objects ++------------------- + ++Using the plugin tag enables dynamic tree objects. ++ ++ /plugin/; ++ ++For the full details please see Documentation/dt-object-internal.txt + + -- David Gibson <david@gibson.dropbear.id.au> + -- Yoder Stuart <stuart.yoder@freescale.com> +diff --git a/Documentation/manual.txt b/Documentation/manual.txt +index 65c8540..d313715 100644 +--- a/Documentation/manual.txt ++++ b/Documentation/manual.txt +@@ -133,6 +133,14 @@ Options: + By default the most recent version is generated. + Relevant for dtb and asm output only. + ++ -@ ++ Dynamic resolution mode. For non /plugin/ compilations generate ++ a __symbols__ node containing a list of all nodes with a label. ++ When /plugin/ is used, unresolved references are recorded in ++ a __fixups__ node, while local phandle references are recorded ++ in a __local_fixups__ node. ++ See Documentation/dt-object-internal.txt ++ + + The <output_version> defines what version of the "blob" format will be + generated. Supported versions are 1, 2, 3, 16 and 17. The default is +diff --git a/checks.c b/checks.c +index ee96a25..970c0a3 100644 +--- a/checks.c ++++ b/checks.c +@@ -457,22 +457,93 @@ static void fixup_phandle_references(struct check *c, struct node *dt, + struct node *node, struct property *prop) + { + struct marker *m = prop->val.markers; ++ struct fixup *f, **fp; ++ struct fixup_entry *fe, **fep; + struct node *refnode; + cell_t phandle; ++ int has_phandle_refs; ++ ++ has_phandle_refs = 0; ++ for_each_marker_of_type(m, REF_PHANDLE) { ++ has_phandle_refs = 1; ++ break; ++ } ++ ++ if (!has_phandle_refs) ++ return; + + for_each_marker_of_type(m, REF_PHANDLE) { + assert(m->offset + sizeof(cell_t) <= prop->val.len); + + refnode = get_node_by_ref(dt, m->ref); +- if (! refnode) { ++ if (!refnode && !symbol_fixup_support) { + FAIL(c, "Reference to non-existent node or label \"%s\"\n", +- m->ref); ++ m->ref); + continue; + } + +- phandle = get_node_phandle(dt, refnode); +- *((cell_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle); ++ if (!refnode) { ++ /* allocate fixup entry */ ++ fe = xmalloc(sizeof(*fe)); ++ ++ fe->node = node; ++ fe->prop = prop; ++ fe->offset = m->offset; ++ fe->next = NULL; ++ ++ /* search for an already existing fixup */ ++ for_each_fixup(dt, f) ++ if (strcmp(f->ref, m->ref) == 0) ++ break; ++ ++ /* no fixup found, add new */ ++ if (f == NULL) { ++ f = xmalloc(sizeof(*f)); ++ f->ref = m->ref; ++ f->entries = NULL; ++ f->next = NULL; ++ ++ /* add it to the tree */ ++ fp = &dt->fixups; ++ while (*fp) ++ fp = &(*fp)->next; ++ *fp = f; ++ } ++ ++ /* and now append fixup entry */ ++ fep = &f->entries; ++ while (*fep) ++ fep = &(*fep)->next; ++ *fep = fe; ++ ++ /* mark the entry as unresolved */ ++ phandle = 0xdeadbeef; ++ } else { ++ phandle = get_node_phandle(dt, refnode); ++ ++ /* if it's a plugin, we need to record it */ ++ if (symbol_fixup_support && dt->is_plugin) { ++ ++ /* allocate a new local fixup entry */ ++ fe = xmalloc(sizeof(*fe)); ++ ++ fe->node = node; ++ fe->prop = prop; ++ fe->offset = m->offset; ++ fe->next = NULL; ++ ++ /* append it to the local fixups */ ++ fep = &dt->local_fixups; ++ while (*fep) ++ fep = &(*fep)->next; ++ *fep = fe; ++ } ++ } ++ ++ *((cell_t *)(prop->val.val + m->offset)) = ++ cpu_to_fdt32(phandle); + } ++ + } + ERROR(phandle_references, NULL, NULL, fixup_phandle_references, NULL, + &duplicate_node_names, &explicit_phandles); +@@ -651,6 +722,45 @@ static void check_obsolete_chosen_interrupt_controller(struct check *c, + } + TREE_WARNING(obsolete_chosen_interrupt_controller, NULL); + ++static void check_auto_label_phandles(struct check *c, struct node *dt, ++ struct node *node) ++{ ++ struct label *l; ++ struct symbol *s, **sp; ++ int has_label; ++ ++ if (!symbol_fixup_support) ++ return; ++ ++ has_label = 0; ++ for_each_label(node->labels, l) { ++ has_label = 1; ++ break; ++ } ++ ++ if (!has_label) ++ return; ++ ++ /* force allocation of a phandle for this node */ ++ (void)get_node_phandle(dt, node); ++ ++ /* add the symbol */ ++ for_each_label(node->labels, l) { ++ ++ s = xmalloc(sizeof(*s)); ++ s->label = l; ++ s->node = node; ++ s->next = NULL; ++ ++ /* add it to the symbols list */ ++ sp = &dt->symbols; ++ while (*sp) ++ sp = &((*sp)->next); ++ *sp = s; ++ } ++} ++NODE_WARNING(auto_label_phandles, NULL); ++ + static struct check *check_table[] = { + &duplicate_node_names, &duplicate_property_names, + &node_name_chars, &node_name_format, &property_name_chars, +@@ -669,6 +779,8 @@ static struct check *check_table[] = { + &avoid_default_addr_size, + &obsolete_chosen_interrupt_controller, + ++ &auto_label_phandles, ++ + &always_fail, + }; + +diff --git a/dtc-lexer.l b/dtc-lexer.l +index 3b41bfc..78d5132 100644 +--- a/dtc-lexer.l ++++ b/dtc-lexer.l +@@ -112,6 +112,11 @@ static int pop_input_file(void); + return DT_V1; + } + ++<*>"/plugin/" { ++ DPRINT("Keyword: /plugin/\n"); ++ return DT_PLUGIN; ++ } ++ + <*>"/memreserve/" { + DPRINT("Keyword: /memreserve/\n"); + BEGIN_DEFAULT(); +diff --git a/dtc-parser.y b/dtc-parser.y +index f412460..e444acf 100644 +--- a/dtc-parser.y ++++ b/dtc-parser.y +@@ -20,6 +20,7 @@ + + %{ + #include <stdio.h> ++#include <inttypes.h> + + #include "dtc.h" + #include "srcpos.h" +@@ -56,9 +57,11 @@ static unsigned char eval_char_literal(const char *s); + struct node *nodelist; + struct reserve_info *re; + uint64_t integer; ++ int is_plugin; + } + + %token DT_V1 ++%token DT_PLUGIN + %token DT_MEMRESERVE + %token DT_LSHIFT DT_RSHIFT DT_LE DT_GE DT_EQ DT_NE DT_AND DT_OR + %token DT_BITS +@@ -76,6 +79,7 @@ static unsigned char eval_char_literal(const char *s); + + %type <data> propdata + %type <data> propdataprefix ++%type <is_plugin> plugindecl + %type <re> memreserve + %type <re> memreserves + %type <array> arrayprefix +@@ -106,10 +110,23 @@ static unsigned char eval_char_literal(const char *s); + %% + + sourcefile: +- DT_V1 ';' memreserves devicetree ++ DT_V1 ';' plugindecl memreserves devicetree + { +- the_boot_info = build_boot_info($3, $4, +- guess_boot_cpuid($4)); ++ $5->is_plugin = $3; ++ $5->is_root = 1; ++ the_boot_info = build_boot_info($4, $5, ++ guess_boot_cpuid($5)); ++ } ++ ; ++ ++plugindecl: ++ /* empty */ ++ { ++ $$ = 0; ++ } ++ | DT_PLUGIN ';' ++ { ++ $$ = 1; + } + ; + +diff --git a/dtc.c b/dtc.c +index e3c9653..d2f9647 100644 +--- a/dtc.c ++++ b/dtc.c +@@ -29,6 +29,7 @@ int reservenum; /* Number of memory reservation slots */ + int minsize; /* Minimum blob size */ + int padsize; /* Additional padding to blob */ + int phandle_format = PHANDLE_BOTH; /* Use linux,phandle or phandle properties */ ++int symbol_fixup_support = 0; + + static void fill_fullpaths(struct node *tree, const char *prefix) + { +@@ -49,7 +50,7 @@ static void fill_fullpaths(struct node *tree, const char *prefix) + + /* Usage related data. */ + static const char usage_synopsis[] = "dtc [options] <input file>"; +-static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:fb:i:H:sW:E:hv"; ++static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:fb:i:H:sW:E:hv:@"; + static struct option const usage_long_opts[] = { + {"quiet", no_argument, NULL, 'q'}, + {"in-format", a_argument, NULL, 'I'}, +@@ -67,6 +68,7 @@ static struct option const usage_long_opts[] = { + {"phandle", a_argument, NULL, 'H'}, + {"warning", a_argument, NULL, 'W'}, + {"error", a_argument, NULL, 'E'}, ++ {"symbols", a_argument, NULL, '@'}, + {"help", no_argument, NULL, 'h'}, + {"version", no_argument, NULL, 'v'}, + {NULL, no_argument, NULL, 0x0}, +@@ -97,6 +99,7 @@ static const char * const usage_opts_help[] = { + "\t\tboth - Both \"linux,phandle\" and \"phandle\" properties", + "\n\tEnable/disable warnings (prefix with \"no-\")", + "\n\tEnable/disable errors (prefix with \"no-\")", ++ "\n\tSymbols and Fixups support", + "\n\tPrint this help and exit", + "\n\tPrint version and exit", + NULL, +@@ -184,7 +187,9 @@ int main(int argc, char *argv[]) + case 'E': + parse_checks_option(false, true, optarg); + break; +- ++ case '@': ++ symbol_fixup_support = 1; ++ break; + case 'h': + usage(NULL); + default: +diff --git a/dtc.h b/dtc.h +index 264a20c..8c9059b 100644 +--- a/dtc.h ++++ b/dtc.h +@@ -54,6 +54,7 @@ extern int reservenum; /* Number of memory reservation slots */ + extern int minsize; /* Minimum blob size */ + extern int padsize; /* Additional padding to blob */ + extern int phandle_format; /* Use linux,phandle or phandle properties */ ++extern int symbol_fixup_support;/* enable symbols & fixup support */ + + #define PHANDLE_LEGACY 0x1 + #define PHANDLE_EPAPR 0x2 +@@ -132,6 +133,25 @@ struct label { + struct label *next; + }; + ++struct fixup_entry { ++ int offset; ++ struct node *node; ++ struct property *prop; ++ struct fixup_entry *next; ++}; ++ ++struct fixup { ++ char *ref; ++ struct fixup_entry *entries; ++ struct fixup *next; ++}; ++ ++struct symbol { ++ struct label *label; ++ struct node *node; ++ struct symbol *next; ++}; ++ + struct property { + int deleted; + char *name; +@@ -158,6 +178,12 @@ struct node { + int addr_cells, size_cells; + + struct label *labels; ++ ++ int is_root; ++ int is_plugin; ++ struct fixup *fixups; ++ struct symbol *symbols; ++ struct fixup_entry *local_fixups; + }; + + #define for_each_label_withdel(l0, l) \ +@@ -181,6 +207,18 @@ struct node { + for_each_child_withdel(n, c) \ + if (!(c)->deleted) + ++#define for_each_fixup(n, f) \ ++ for ((f) = (n)->fixups; (f); (f) = (f)->next) ++ ++#define for_each_fixup_entry(f, fe) \ ++ for ((fe) = (f)->entries; (fe); (fe) = (fe)->next) ++ ++#define for_each_symbol(n, s) \ ++ for ((s) = (n)->symbols; (s); (s) = (s)->next) ++ ++#define for_each_local_fixup_entry(n, fe) \ ++ for ((fe) = (n)->local_fixups; (fe); (fe) = (fe)->next) ++ + void add_label(struct label **labels, char *label); + void delete_labels(struct label **labels); + +diff --git a/flattree.c b/flattree.c +index 665dad7..6237715 100644 +--- a/flattree.c ++++ b/flattree.c +@@ -262,6 +262,12 @@ static void flatten_tree(struct node *tree, struct emitter *emit, + struct property *prop; + struct node *child; + int seen_name_prop = 0; ++ struct symbol *sym; ++ struct fixup *f; ++ struct fixup_entry *fe; ++ char *name, *s; ++ const char *fullpath; ++ int namesz, nameoff, vallen; + + if (tree->deleted) + return; +@@ -310,6 +316,139 @@ static void flatten_tree(struct node *tree, struct emitter *emit, + flatten_tree(child, emit, etarget, strbuf, vi); + } + ++ if (!symbol_fixup_support) ++ goto no_symbols; ++ ++ /* add the symbol nodes (if any) */ ++ if (tree->symbols) { ++ ++ emit->beginnode(etarget, NULL); ++ emit->string(etarget, "__symbols__", 0); ++ emit->align(etarget, sizeof(cell_t)); ++ ++ for_each_symbol(tree, sym) { ++ ++ vallen = strlen(sym->node->fullpath); ++ ++ nameoff = stringtable_insert(strbuf, sym->label->label); ++ ++ emit->property(etarget, NULL); ++ emit->cell(etarget, vallen + 1); ++ emit->cell(etarget, nameoff); ++ ++ if ((vi->flags & FTF_VARALIGN) && vallen >= 8) ++ emit->align(etarget, 8); ++ ++ emit->string(etarget, sym->node->fullpath, ++ strlen(sym->node->fullpath)); ++ emit->align(etarget, sizeof(cell_t)); ++ } ++ ++ emit->endnode(etarget, NULL); ++ } ++ ++ /* add the fixup nodes */ ++ if (tree->fixups) { ++ ++ /* emit the external fixups */ ++ emit->beginnode(etarget, NULL); ++ emit->string(etarget, "__fixups__", 0); ++ emit->align(etarget, sizeof(cell_t)); ++ ++ for_each_fixup(tree, f) { ++ ++ namesz = 0; ++ for_each_fixup_entry(f, fe) { ++ fullpath = fe->node->fullpath; ++ if (fullpath[0] == '\0') ++ fullpath = "/"; ++ namesz += strlen(fullpath) + 1; ++ namesz += strlen(fe->prop->name) + 1; ++ namesz += 32; /* space for :<number> + '\0' */ ++ } ++ ++ name = xmalloc(namesz); ++ ++ s = name; ++ for_each_fixup_entry(f, fe) { ++ fullpath = fe->node->fullpath; ++ if (fullpath[0] == '\0') ++ fullpath = "/"; ++ snprintf(s, name + namesz - s, "%s:%s:%d", ++ fullpath, ++ fe->prop->name, fe->offset); ++ s += strlen(s) + 1; ++ } ++ ++ nameoff = stringtable_insert(strbuf, f->ref); ++ vallen = s - name - 1; ++ ++ emit->property(etarget, NULL); ++ emit->cell(etarget, vallen + 1); ++ emit->cell(etarget, nameoff); ++ ++ if ((vi->flags & FTF_VARALIGN) && vallen >= 8) ++ emit->align(etarget, 8); ++ ++ emit->string(etarget, name, vallen); ++ emit->align(etarget, sizeof(cell_t)); ++ ++ free(name); ++ } ++ ++ emit->endnode(etarget, tree->labels); ++ } ++ ++ /* add the local fixup property */ ++ if (tree->local_fixups) { ++ ++ /* emit the external fixups */ ++ emit->beginnode(etarget, NULL); ++ emit->string(etarget, "__local_fixups__", 0); ++ emit->align(etarget, sizeof(cell_t)); ++ ++ namesz = 0; ++ for_each_local_fixup_entry(tree, fe) { ++ fullpath = fe->node->fullpath; ++ if (fullpath[0] == '\0') ++ fullpath = "/"; ++ namesz += strlen(fullpath) + 1; ++ namesz += strlen(fe->prop->name) + 1; ++ namesz += 32; /* space for :<number> + '\0' */ ++ } ++ ++ name = xmalloc(namesz); ++ ++ s = name; ++ for_each_local_fixup_entry(tree, fe) { ++ fullpath = fe->node->fullpath; ++ if (fullpath[0] == '\0') ++ fullpath = "/"; ++ snprintf(s, name + namesz - s, "%s:%s:%d", ++ fullpath, fe->prop->name, ++ fe->offset); ++ s += strlen(s) + 1; ++ } ++ ++ nameoff = stringtable_insert(strbuf, "fixup"); ++ vallen = s - name - 1; ++ ++ emit->property(etarget, NULL); ++ emit->cell(etarget, vallen + 1); ++ emit->cell(etarget, nameoff); ++ ++ if ((vi->flags & FTF_VARALIGN) && vallen >= 8) ++ emit->align(etarget, 8); ++ ++ emit->string(etarget, name, vallen); ++ emit->align(etarget, sizeof(cell_t)); ++ ++ free(name); ++ ++ emit->endnode(etarget, tree->labels); ++ } ++ ++no_symbols: + emit->endnode(etarget, tree->labels); + } + +-- +1.8.3.1 +