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authorJoel Sherrill <joel.sherrill@OARcorp.com>2011-05-17 20:39:40 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2011-05-17 20:39:40 +0000
commitd751cecbb1ca1b7ac0a7bc8492e0e61e6c5fc0c7 (patch)
tree84a74c59b9f7f096e0fae3dd351e5274bf836bb5 /tools/cpu/nios2/bridges.c
parentd305d75c7eac1018c13788954b6707261b5fd176 (diff)
downloadrtems-d751cecbb1ca1b7ac0a7bc8492e0e61e6c5fc0c7.tar.bz2
* tools/build/.cvsignore, tools/build/ChangeLog,
tools/build/Makefile.am, tools/build/README, tools/build/binpatch.c, tools/build/cklength.c, tools/build/config.h.in, tools/build/configure.ac, tools/build/cvsignore-add.sh, tools/build/doxy-filter, tools/build/eolstrip.c, tools/build/install-if-change.in, tools/build/multigen, tools/build/packhex.c, tools/build/rtems-bin2c.c, tools/build/search-id.sh, tools/build/unhex.c, tools/cpu/.cvsignore, tools/cpu/ChangeLog, tools/cpu/Makefile.am, tools/cpu/configure.ac, tools/cpu/generic/.cvsignore, tools/cpu/generic/ChangeLog, tools/cpu/generic/Makefile.am, tools/cpu/generic/configure.ac, tools/cpu/generic/size_rtems.in, tools/cpu/nios2/.cvsignore, tools/cpu/nios2/ChangeLog, tools/cpu/nios2/Makefile.am, tools/cpu/nios2/README, tools/cpu/nios2/bridges.c, tools/cpu/nios2/bridges.h, tools/cpu/nios2/clocks.c, tools/cpu/nios2/clocks.h, tools/cpu/nios2/configure.ac, tools/cpu/nios2/devices.c, tools/cpu/nios2/devices.h, tools/cpu/nios2/linkcmds.c, tools/cpu/nios2/linkcmds.h, tools/cpu/nios2/memory.c, tools/cpu/nios2/memory.h, tools/cpu/nios2/nios2gen.c, tools/cpu/nios2/output.c, tools/cpu/nios2/output.h, tools/cpu/nios2/ptf.c, tools/cpu/nios2/ptf.h, tools/cpu/nios2/sample.ptf, tools/cpu/sh/.cvsignore, tools/cpu/sh/AUTHORS, tools/cpu/sh/COPYING, tools/cpu/sh/ChangeLog, tools/cpu/sh/Makefile.am, tools/cpu/sh/TODO, tools/cpu/sh/configure.ac, tools/cpu/sh/sci.c, tools/cpu/sh/sci.h, tools/cpu/sh/shgen.c: New files.
Diffstat (limited to 'tools/cpu/nios2/bridges.c')
-rw-r--r--tools/cpu/nios2/bridges.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/tools/cpu/nios2/bridges.c b/tools/cpu/nios2/bridges.c
new file mode 100644
index 0000000000..be5e889b5e
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+++ b/tools/cpu/nios2/bridges.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2006 Kolja Waschk rtemsdev/ixo.de
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ *
+ * $Id$
+ */
+
+/********************************************************/
+/* Find bus bridges */
+
+/* This part of the program builds a list with pairs of bus
+ master port names (each is "device name/master port name").
+ It is then possible to find if a given master is actually
+ available under a different master port name through bridges.
+ */
+
+/* Typical example with external SRAM that is slave of
+ tristate_bridge_0/tristate_master, and
+ tristate_bridge_0 itself is slave of cpu0/data_master, the
+ bridge information would be stored as this bus_bridge_pair:
+ mastered_by = "cpu0/data_master" and
+ bridges_to = "tristate_bridge_0/tristate_master".
+ That allows to deduce that SRAM is actually mastered by
+ cpu0/data_master. If there were any address or bus width
+ translations, it should be noted in the bridges list... For
+ now we simply assume that bridges never translate anything.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "ptf.h"
+#include "bridges.h"
+
+int is_bridged(
+ char *cpu_master,
+ char *dev_master,
+ bus_bridge_pair *bridges)
+{
+ char *curr_master;
+ bus_bridge_pair *bbp;
+
+ if(strcmp(cpu_master, dev_master) == 0) return 1; /* cpu directly masters dev */
+
+ for(bbp = bridges; bbp != NULL; bbp=bbp->next)
+ {
+ if(strcmp(cpu_master, bbp->mastered_by) == 0 &&
+ is_bridged(bbp->bridges_to, dev_master, bridges))
+ {
+ return 1; /* cpu masters dev via bridge */
+ }
+ };
+
+ return 0;
+}
+
+void add_bridge_master(struct ptf_item *pi, void *arg)
+{
+ struct { char *bt; bus_bridge_pair **bridges; } *binfo = arg;
+ bus_bridge_pair *new_pair;
+
+ if(binfo->bridges == 0) return;
+
+ new_pair = (bus_bridge_pair *)malloc(sizeof(bus_bridge_pair));
+ if(new_pair == NULL) return;
+
+ new_pair->bridges_to = binfo->bt;
+ new_pair->mastered_by = pi->item[pi->level]->value;
+ new_pair->next = *(binfo->bridges);
+ *(binfo->bridges) = new_pair;
+}
+
+void add_bridge_dest(struct ptf_item *pi, void *arg)
+{
+ struct ptf maby_section = { section, "MASTERED_BY", 0, 0, 0 };
+ struct ptf_item maby = { 1, &maby_section };
+
+ char *bridge_name = pi->item[1]->value;
+ char *bridge_dest = pi->item[pi->level]->value;
+ struct { char *bt; bus_bridge_pair **bridges; } binfo;
+
+ binfo.bridges = arg;
+ binfo.bt = (char*)malloc(strlen(bridge_name)+strlen(bridge_dest) + 2);
+ strcpy(binfo.bt, bridge_name);
+ strcat(binfo.bt, "/");
+ strcat(binfo.bt, bridge_dest);
+
+ ptf_match(pi->item[pi->level-1]->sub, &maby, add_bridge_master, &binfo);
+
+ /* binfo.bt is NOT freed here */
+}
+
+bus_bridge_pair *find_bridges(struct ptf *p)
+{
+ bus_bridge_pair *bridges = 0;
+
+ struct ptf system = { section, "SYSTEM", 0, 0, 0 };
+ struct ptf module = { section, "MODULE", 0, 0, 0 };
+ struct ptf slave = { section, "SLAVE", 0, 0, 0 };
+ struct ptf syb = { section, "SYSTEM_BUILDER_INFO", 0, 0, 0 };
+ struct ptf to = { item, "Bridges_To", 0, 0, 0 };
+ struct ptf_item brdg = { 5, &system, &module, &slave, &syb, &to };
+
+ ptf_match(p, &brdg, add_bridge_dest, &bridges);
+
+ return bridges;
+}
+
+
+
+