Martin Stein
Norman Feske
parent
b6626607f0
commit
12f560dc0e
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@ -1,39 +0,0 @@
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/*
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* \brief Atomic operations for ARM
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* \author Norman Feske
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* \date 2007-04-28
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*/
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/*
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* Copyright (C) 2007-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _INCLUDE__ARM__CPU__ATOMIC_H_
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#define _INCLUDE__ARM__CPU__ATOMIC_H_
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namespace Genode {
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extern "C" long int
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l4_atomic_cmpxchg(volatile long int*, long int, long int);
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/**
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* Atomic compare and exchange
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*
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* This function compares the value at dest with cmp_val.
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* If both values are equal, dest is set to new_val. If
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* both values are different, the value at dest remains
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* unchanged.
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*
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* \return 1 if the value was successfully changed to new_val,
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* 0 if cmp_val and the value at dest differ.
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*/
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inline int cmpxchg(volatile int *dest, int cmp_val, int new_val)
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{
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return l4_atomic_cmpxchg((volatile long int *)dest, cmp_val, new_val);
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}
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}
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#endif /* _INCLUDE__ARM__CPU__ATOMIC_H_ */
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#
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# Configuration for L4 build system (for kernel-bindings, sigma0, bootstrap).
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#
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L4_CONFIG = $(REP_DIR)/config/l4env-config.x86
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include $(REP_DIR)/lib/mk/platform.inc
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#
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# Specifics for Fiasco on ARM
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#
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# The following variables must be defined by a platform spec file:
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#
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# L4SYS_ARM_CPU - Platform identifiert used for constructing l4sys path
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# names corresponding to the ARM platform. For example,
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# specify 'arm_int' for the ARM integrator board.
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# RAM_BASE - Start address of physical memory. If not specified,
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# the start adress 0x0 is used.
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#
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SPECS += arm fiasco 32bit
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#
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# ARM-specific L4/sys headers
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#
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L4_INC_DIR += $(L4_BUILD_DIR)/include/arm/l4v2 \
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$(L4_BUILD_DIR)/include/arm
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#
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# Support for Fiasco's ARM-specific extensions of L4
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# and ARM-specific utility functions.
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#
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REP_INC_DIR += include/arm
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#
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# Defines for L4/sys headers
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#
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CC_OPT += -DSYSTEM_$(L4SYS_ARM_CPU)_l4v2
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CC_OPT += -DCONFIG_L4_CALL_SYSCALLS -DL4API_l4v2 -DARCH_arm
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CC_OPT += -msoft-float -fomit-frame-pointer
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AS_OPT += -mfpu=softfpa
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#
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# Linker options that are specific for L4 on ARM
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#
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RAM_BASE ?= 0x0
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LD_TEXT_ADDR ?= $(shell printf "0x%x" $$(($(RAM_BASE) + 0x00078000)))
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CXX_LINK_OPT += -Wl,-Ttext=$(LINK_TEXT_ADDR)
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CXX_LINK_OPT += -L$(L4_BUILD_DIR)/lib/$(L4SYS_ARM_CPU)/l4v2
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EXT_OBJECTS += -ll4sys
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#
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# Also include less-specific configuration last
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#
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include $(call select_from_repositories,mk/spec-32bit.mk)
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include $(call select_from_repositories,mk/spec-fiasco.mk)
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INC_DIR += $(L4_INC_DIR)
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/*
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* \brief Platform support specific to ARM
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* \author Norman Feske
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* \date 2007-10-13
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*/
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/*
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* Copyright (C) 2007-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#include "platform.h"
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using namespace Genode;
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void Platform::_setup_io_port_alloc()
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{
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/*
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* This is just a dummy init function for the I/O port allocator.
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* ARM does not I/O port support.
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*/
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}
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include $(PRG_DIR)/../target.inc
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REQUIRES += arm
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SRC_CC += platform_arm.cc
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vpath io_port_session_component.cc $(GEN_CORE_DIR)/arm
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vpath platform_services.cc $(GEN_CORE_DIR)
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SRC = ../x86/genode.ld
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TARGET = genode.ld
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all:
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@echo "--- available targets ---"
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@echo " genode.ld - generate $(TARGET) from $(SRC)"
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@echo " cleanall - remove generated file"
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#
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# NOTE: We change the start address to 0x60000, which
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# is the same address as used by the original
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# roottask.
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#
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# On L4x0, the thread ID type is only 32bit instead of 64bit
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# for L4v2. Therefore, we have to adapt the place holder for
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# thread ID part of the parent capability.
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#
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genode.ld:
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cp $(SRC) $@
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sed -i "s/= 0x[0-9]\+;/= 0x00060000;/" $@
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sed -i "54s/^.*$$/\t\tLONG(0xffffffff);/" $@
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clean cleanall:
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rm -f $(TARGET)
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@ -1,124 +0,0 @@
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/**
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* \brief Startup code for Fiasco/ARM
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* \author Norman Feske
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* \date 2007-04-30
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*
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* Call constructors for static objects before calling main().
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*/
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/*
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* Copyright (C) 2007-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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namespace Fiasco {
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#include <l4/sys/kdebug.h>
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}
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/* Genode */
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#include <base/crt0.h>
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#include <base/env.h>
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#include <base/sleep.h>
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#include <base/printf.h>
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namespace Genode {
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/**
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* Return constructed parent capability
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*/
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Parent_capability parent_cap()
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{
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Fiasco::l4_threadid_t tid = *(Fiasco::l4_threadid_t *)&_parent_cap_thread_id;
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return Parent_capability(Native_capability(tid, _parent_cap_local_name));
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}
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}
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using namespace Genode;
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/***************
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** C++ stuff **
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***************/
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/*
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* This symbol must be defined when exception
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* headers are defined in the linker script.
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*/
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extern "C" __attribute__((weak)) void *__gxx_personality_v0(void)
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{
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Fiasco::outstring("What a surprise! This function is really used? Sorry - not implemented\n");
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return 0;
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}
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/**
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* Resolve symbols needed by libsupc++ to make
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* the linker happy.
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*
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* FIXME: implement us!
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*/
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extern "C" __attribute__((weak)) int atexit(void) {
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Fiasco::outstring("atexit() called - not implemented!\n");
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return 0;
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};
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extern "C" __attribute__((weak)) int memcmp(void) {
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Fiasco::outstring("memcmp() called - not implemented!\n");
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return 0;
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};
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extern "C" __attribute__((weak)) int strncmp(void) {
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Fiasco::outstring("strncmp() called - not implemented!\n");
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return 0;
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};
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extern int main(int argc, char **argv);
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extern void init_exception_handling(); /* implemented in base/cxx */
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/* FIXME no support for commandline
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* ask parent for argc and argv */
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static char argv0[] = { '_', 'm', 'a', 'i', 'n'};
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static char *argv[1] = { argv0 };
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/*
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* Define 'environ' pointer that is supposed to be exported by
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* the startup code and relied on by any libC. Because we have no
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* UNIX environment, however, we set this pointer to NULL.
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*/
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__attribute__((weak)) char **environ = (char **)0;
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/**
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* C entry function called by the crt0 startup code
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*/
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extern "C" int _main()
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{
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/* call constructors for static objects */
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void (**func)();
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for (func = &_ctors_end; func != &_ctors_start; (*--func)());
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/* initialize exception handling */
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init_exception_handling();
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/* completely map program image by touching all pages read-only */
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volatile const char *beg, *end;
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beg = (const char *)(((unsigned)&_prog_img_beg) & L4_PAGEMASK);
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end = (const char *)&_prog_img_end;
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for ( ; beg < end; beg += L4_PAGESIZE) (void)(*beg);
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/* call real main function */
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/* XXX no support for commandline */
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int ret = main(1, argv);
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/* inform parent about program exit */
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env()->parent()->exit(ret);
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PDBG("main() returned %d", ret);
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sleep_forever();
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return ret;
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}
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@ -1,37 +0,0 @@
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/**
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* \brief Startup code for Genode applications on ARM
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* \author Norman Feske
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* \date 2007-04-28
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*/
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/*
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* Copyright (C) 2007-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/*--- .text (program code) -------------------------*/
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.text
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.globl _start
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_start:
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ldr sp, .initial_sp
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b _main
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.initial_sp: .word _stack_high
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.globl __dso_handle
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__dso_handle:
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.long 0
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/*--- .bss (non-initialized data) ------------------*/
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.section ".bss"
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.globl _stack_low
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_stack_low:
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.space 64*1024
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.globl _stack_high
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_stack_high:
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