From d751cecbb1ca1b7ac0a7bc8492e0e61e6c5fc0c7 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Tue, 17 May 2011 20:39:40 +0000 Subject: * 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. --- tools/cpu/nios2/bridges.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 tools/cpu/nios2/bridges.c (limited to 'tools/cpu/nios2/bridges.c') diff --git a/tools/cpu/nios2/bridges.c b/tools/cpu/nios2/bridges.c new file mode 100644 index 0000000000..be5e889b5e --- /dev/null +++ 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 +#include + +#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; +} + + + + -- cgit v1.2.3