forked from Imagelibrary/rtems
bsp/gdbarmsim: Switch to the standard arm/shared/startup.
Switch to the standard ARM startup code. This requires adding the standard interrupt code. The interrupt code does nothing at this point in time. I do not know if the ARM simulator in GDB supports interrupts.
This commit is contained in:
Chris Johns
@@ -10,6 +10,9 @@ include_HEADERS = include/bsp.h
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include_HEADERS += ../../shared/include/tm27.h
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include_bsp_HEADERS = include/irq.h
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include_bsp_HEADERS += include/swi.h
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include_bsp_HEADERS += ../shared/include/start.h
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include_bsp_HEADERS += ../../shared/include/irq-generic.h
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include_bsp_HEADERS += ../../shared/include/irq-info.h
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nodist_include_HEADERS = include/bspopts.h
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nodist_include_bsp_HEADERS = ../../shared/include/bootcard.h
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@@ -19,7 +22,7 @@ noinst_PROGRAMS =
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nodist_include_HEADERS += ../../shared/include/coverhd.h
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noinst_LIBRARIES = libbspstart.a
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libbspstart_a_SOURCES = start/start.S
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libbspstart_a_SOURCES = ../shared/start/start.S
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project_lib_DATA = start.$(OBJEXT)
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dist_project_lib_DATA += startup/linkcmds
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@@ -43,6 +46,19 @@ libbsp_a_SOURCES += ../../shared/clock_driver_simidle.c
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libbsp_a_SOURCES += ../../shared/timerstub.c
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# above
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libbsp_a_SOURCES += ../shared/abort/abort.c
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# start hooks
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libbsp_a_SOURCES += startup/bspstarthooks.c
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libbsp_a_SOURCES += ../shared/startup/bsp-start-memcpy.S
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# IRQ
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libbsp_a_SOURCES += irq/irq.c
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libbsp_a_SOURCES += irq/irq-dispatch.c
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libbsp_a_SOURCES += ../../shared/src/irq-default-handler.c
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libbsp_a_SOURCES += ../../shared/src/irq-generic.c
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libbsp_a_SOURCES += ../../shared/src/irq-info.c
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libbsp_a_SOURCES += ../../shared/src/irq-legacy.c
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libbsp_a_SOURCES += ../../shared/src/irq-server.c
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libbsp_a_SOURCES += ../../shared/src/irq-shell.c
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# Cache
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libbsp_a_SOURCES += ../../../libcpu/shared/src/cache_manager.c
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50
c/src/lib/libbsp/arm/gdbarmsim/irq/irq-dispatch.c
Normal file
50
c/src/lib/libbsp/arm/gdbarmsim/irq/irq-dispatch.c
Normal file
@@ -0,0 +1,50 @@
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/**
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* @file
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*
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* @ingroup bsp_interrupt
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*
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* @brief GDB ARM Simulator interrupt support.
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*/
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/*
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* Copyright (c) 2008-2012 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Obere Lagerstr. 30
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <rtems/score/armv4.h>
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#include <bsp.h>
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#include <bsp/irq.h>
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#include <bsp/irq-generic.h>
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#ifdef ARM_MULTILIB_ARCH_V4
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void bsp_interrupt_dispatch(void)
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{
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/* Read current vector number */
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/* rtems_vector_number vector = VICVectAddr; */
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rtems_vector_number vector = 0;
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/* Enable interrupts in program status register */
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uint32_t psr = _ARMV4_Status_irq_enable();
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/* Dispatch interrupt handlers */
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bsp_interrupt_handler_dispatch(vector);
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/* Restore program status register */
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_ARMV4_Status_restore(psr);
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/* Acknowledge interrupt */
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//VICVectAddr = 0;
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}
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#endif /* ARM_MULTILIB_ARCH_V4 */
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64
c/src/lib/libbsp/arm/gdbarmsim/irq/irq.c
Normal file
64
c/src/lib/libbsp/arm/gdbarmsim/irq/irq.c
Normal file
@@ -0,0 +1,64 @@
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/**
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* @file
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*
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* @ingroup bsp_interrupt
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*
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* @brief GDB ARM Simulator interrupt support.
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*/
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/*
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* Copyright (c) 2008-2012 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Obere Lagerstr. 30
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <rtems/score/armv4.h>
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#include <rtems/score/armv7m.h>
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#include <bsp.h>
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#include <bsp/irq.h>
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#include <bsp/irq-generic.h>
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#include <bsp/linker-symbols.h>
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static inline bool lpc24xx_irq_is_valid(rtems_vector_number vector)
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{
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return vector <= BSP_INTERRUPT_VECTOR_MAX;
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}
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void lpc24xx_irq_set_priority(rtems_vector_number vector, unsigned priority)
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{
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}
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unsigned lpc24xx_irq_get_priority(rtems_vector_number vector)
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{
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}
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#ifdef ARM_MULTILIB_ARCH_V4
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rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
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{
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return RTEMS_SUCCESSFUL;
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}
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rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
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{
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return RTEMS_SUCCESSFUL;
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}
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rtems_status_code bsp_interrupt_facility_initialize(void)
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{
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/* Install the IRQ exception handler */
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_CPU_ISR_install_vector(ARM_EXCEPTION_IRQ, _ARMV4_Exception_interrupt, NULL);
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return RTEMS_SUCCESSFUL;
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}
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#endif /* ARM_MULTILIB_ARCH_V4 */
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@@ -53,6 +53,18 @@ $(PROJECT_INCLUDE)/bsp/swi.h: include/swi.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
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$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/swi.h
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PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/swi.h
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$(PROJECT_INCLUDE)/bsp/start.h: ../shared/include/start.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
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$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/start.h
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PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/start.h
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$(PROJECT_INCLUDE)/bsp/irq-generic.h: ../../shared/include/irq-generic.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
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$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/irq-generic.h
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PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/irq-generic.h
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$(PROJECT_INCLUDE)/bsp/irq-info.h: ../../shared/include/irq-info.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
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$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/irq-info.h
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PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/irq-info.h
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$(PROJECT_INCLUDE)/bspopts.h: include/bspopts.h $(PROJECT_INCLUDE)/$(dirstamp)
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$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bspopts.h
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PREINSTALL_FILES += $(PROJECT_INCLUDE)/bspopts.h
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@@ -1,401 +0,0 @@
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/*
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* Copied from libgloss 1 Oct 2009.
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* Minor modifications to work with RTEMS.
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*/
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#include <newlib.h>
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#include <bsp/swi.h>
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#include <bsp/linker-symbols.h>
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/* ANSI concatenation macros. */
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#define CONCAT(a, b) CONCAT2(a, b)
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#define CONCAT2(a, b) a ## b
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#ifdef __USER_LABEL_PREFIX__
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#define FUNCTION( name ) CONCAT (__USER_LABEL_PREFIX__, name)
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#else
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#error __USER_LABEL_PREFIX is not defined
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#endif
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#ifdef HAVE_INITFINI_ARRAY
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#define _init __libc_init_array
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#define _fini __libc_fini_array
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#endif
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/* .text is used instead of .section .text so it works with arm-aout too. */
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.text
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#if defined(__thumb2__)
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.syntax unified
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.thumb
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.macro FUNC_START name
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.global \name
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.thumb_func
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\name:
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.endm
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#else
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.code 32
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.macro FUNC_START name
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.global \name
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\name:
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.endm
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#endif
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.align 0
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FUNC_START _mainCRTStartup
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FUNC_START _start
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FUNC_START start
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#if defined(__ELF__) && !defined(__USING_SJLJ_EXCEPTIONS__)
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/* Annotation for EABI unwinding tables. */
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.fnstart
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#endif
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/* Start by setting up a stack */
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#ifdef ARM_RDP_MONITOR
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/* Issue Demon SWI to read stack info */
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swi SWI_GetEnv /* Returns command line in r0 */
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mov sp,r1 /* and the highest memory address in r1 */
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ldr sl, .LC2 /* stack limit is at end of data */
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add sl, sl, #256 /* allow slop for stack overflow handling */
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/* and small frames */
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#else
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#ifdef ARM_RDI_MONITOR
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/* Issue Angel SWI to read stack info */
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mov r0, #AngelSWI_Reason_HeapInfo
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adr r1, .LC0 /* point at ptr to 4 words to receive data */
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#if defined(__thumb2__)
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bkpt AngelSWI
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#else
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/* We are always in ARM mode for startup */
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AngelSWIAsm AngelSWI_ARM
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#endif
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ldr r0, .LC0 /* point at values read */
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ldr sp, [r0, #8]
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ldr sl, [r0, #12]
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add sl, sl, #256 /* allow slop for stack overflow handling */
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/* and small frames */
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#else
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/* Set up the stack pointer to a fixed value */
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/* Changes by toralf:
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- Allow linker script to provide stack via __stack symbol - see
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defintion of .Lstack
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- Provide "hooks" that may be used by the application to add
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custom init code - see .Lhwinit and .Lswinit
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- Go through all execution modes and set up stack for each of them.
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Loosely based on init.s from ARM/Motorola example code.
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Note: Mode switch via CPSR is not allowed once in non-privileged
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mode, so we take care not to enter "User" to set up its sp,
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and also skip most operations if already in that mode. */
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ldr r3, .Lstack
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cmp r3, #0
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#ifdef __thumb2__
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it eq
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#endif
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ldreq r3, .LC0
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/* Note: This 'mov' is essential when starting in User, and ensures we
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always get *some* sp value for the initial mode, even if we
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have somehow missed it below (in which case it gets the same
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value as FIQ - not ideal, but better than nothing.) */
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mov sp, r3
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#ifdef __thumb2__
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/* XXX Fill in stack assignments for interrupt modes. */
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#else
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mrs r2, CPSR
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tst r2, #0x0F /* Test mode bits - in User of all are 0 */
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beq .LC23 /* "eq" means r2 AND #0x0F is 0 */
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msr CPSR_c, #0xD1 /* FIRQ mode, interrupts disabled */
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mov sp, r3
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sub sl, sp, #0x1000 /* This mode also has its own sl (see below) */
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mov r3, sl
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msr CPSR_c, #0xD7 /* Abort mode, interrupts disabled */
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mov sp, r3
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sub r3, r3, #0x1000
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msr CPSR_c, #0xDB /* Undefined mode, interrupts disabled */
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mov sp, r3
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sub r3, r3, #0x1000
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msr CPSR_c, #0xD2 /* IRQ mode, interrupts disabled */
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mov sp, r3
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sub r3, r3, #0x2000
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msr CPSR_c, #0xD3 /* Supervisory mode, interrupts disabled */
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mov sp, r3
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sub r3, r3, #0x8000 /* Min size 32k */
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bic r3, r3, #0x00FF /* Align with current 64k block */
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bic r3, r3, #0xFF00
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str r3, [r3, #-4] /* Move value into user mode sp without */
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ldmdb r3, {sp}^ /* changing modes, via '^' form of ldm */
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orr r2, r2, #0xC0 /* Back to original mode, presumably SVC, */
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msr CPSR_c, r2 /* with FIQ/IRQ disable bits forced to 1 */
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#endif
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.LC23:
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/* Setup a default stack-limit in-case the code has been
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compiled with "-mapcs-stack-check". Hard-wiring this value
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is not ideal, since there is currently no support for
|
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checking that the heap and stack have not collided, or that
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this default 64k is enough for the program being executed.
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However, it ensures that this simple crt0 world will not
|
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immediately cause an overflow event: */
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sub sl, r3, #64 << 10 /* Still assumes 256bytes below sl */
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#endif
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#endif
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/* Zero the memory in the .bss section. */
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mov a2, #0 /* Second arg: fill value */
|
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mov fp, a2 /* Null frame pointer */
|
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mov r7, a2 /* Null frame pointer for Thumb */
|
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ldr a1, .LC1 /* First arg: start of memory block */
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ldr a3, .LC2
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sub a3, a3, a1 /* Third arg: length of block */
|
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|
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#if defined(__thumb__) && !defined(__thumb2__)
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/* Enter Thumb mode.... */
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add a4, pc, #1 /* Get the address of the Thumb block */
|
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bx a4 /* Go there and start Thumb decoding */
|
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|
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.code 16
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.global __change_mode
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.thumb_func
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__change_mode:
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#endif
|
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bl FUNCTION (memset)
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#if !defined (ARM_RDP_MONITOR) && !defined (ARM_RDI_MONITOR)
|
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/* Changes by toralf: Taken from libgloss/m68k/crt0.S
|
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* initialize target specific stuff. Only execute these
|
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* functions it they exist.
|
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*/
|
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ldr r3, .Lhwinit
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cmp r3, #0
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beq .LC24
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#if defined(__thumb__) || defined(__thumb2__)
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blx r3
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#else
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mov lr, pc
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mov pc, r3
|
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#endif
|
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.LC24:
|
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ldr r3, .Lswinit
|
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cmp r3, #0
|
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beq .LC25
|
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#if defined(__thumb__) || defined(__thumb2__)
|
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blx r3
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#else
|
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mov lr, pc
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mov pc, r3
|
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#endif
|
||||
|
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.LC25:
|
||||
mov r0, #0 /* no arguments */
|
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mov r1, #0 /* no argv either */
|
||||
#else
|
||||
/* Need to set up standard file handles */
|
||||
bl FUNCTION (initialise_monitor_handles)
|
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|
||||
#ifdef ARM_RDP_MONITOR
|
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swi SWI_GetEnv /* sets r0 to point to the command line */
|
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mov r1, r0
|
||||
#else
|
||||
mov r0, #AngelSWI_Reason_GetCmdLine
|
||||
adr r1, .LC30 /* Space for command line */
|
||||
AngelSWIAsm AngelSWI
|
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ldr r1, .LC30
|
||||
#endif
|
||||
/* Parse string at r1 */
|
||||
mov r0, #0 /* count of arguments so far */
|
||||
/* Push a NULL argument onto the end of the list. */
|
||||
#ifdef __thumb__
|
||||
push {r0}
|
||||
#else
|
||||
stmfd sp!, {r0}
|
||||
#endif
|
||||
.LC10:
|
||||
/* Skip leading blanks */
|
||||
#ifdef __thumb__
|
||||
ldrb r3, [r1]
|
||||
add r1, #1
|
||||
#else
|
||||
ldrb r3, [r1], #1
|
||||
#endif
|
||||
cmp r3, #0
|
||||
beq .LC12
|
||||
cmp r3, #' '
|
||||
beq .LC10
|
||||
|
||||
/* See whether we are scanning a string */
|
||||
cmp r3, #'"'
|
||||
#ifdef __thumb__
|
||||
beq .LC20
|
||||
cmp r3, #'\''
|
||||
bne .LC21
|
||||
.LC20:
|
||||
mov r2, r3
|
||||
b .LC22
|
||||
|
||||
.LC21:
|
||||
mov r2, #' ' /* terminator type */
|
||||
sub r1, r1, #1 /* adjust back to point at start char */
|
||||
.LC22:
|
||||
#else
|
||||
cmpne r3, #'\''
|
||||
moveq r2, r3
|
||||
movne r2, #' ' /* terminator type */
|
||||
subne r1, r1, #1 /* adjust back to point at start char */
|
||||
#endif
|
||||
|
||||
/* Stack a pointer to the current argument */
|
||||
#ifdef __thumb__
|
||||
push {r1}
|
||||
#else
|
||||
stmfd sp!, {r1}
|
||||
#endif
|
||||
add r0, r0, #1
|
||||
.LC11:
|
||||
#ifdef __thumb__
|
||||
ldrb r3, [r1]
|
||||
add r1, #1
|
||||
#else
|
||||
ldrb r3, [r1], #1
|
||||
#endif
|
||||
cmp r3, #0
|
||||
beq .LC12
|
||||
cmp r2, r3 /* reached terminator? */
|
||||
bne .LC11
|
||||
mov r2, #0
|
||||
sub r3, r1, #1
|
||||
strb r2, [r3] /* terminate the arg string */
|
||||
b .LC10
|
||||
|
||||
.LC12:
|
||||
mov r1, sp /* point at stacked arg pointers */
|
||||
/* We've now got the stacked args in order reverse the */
|
||||
#ifdef __thumb__
|
||||
mov r2, r0
|
||||
lsl r2, #2
|
||||
add r2, sp
|
||||
mov r3, sp
|
||||
.LC15: cmp r2, r3
|
||||
bls .LC14
|
||||
sub r2, #4
|
||||
ldr r4, [r2]
|
||||
ldr r5, [r3]
|
||||
str r5, [r2]
|
||||
str r4, [r3]
|
||||
add r3, #4
|
||||
b .LC15
|
||||
.LC14:
|
||||
/* Ensure doubleword stack alignment. */
|
||||
mov r4, sp
|
||||
mov r5, #7
|
||||
bic r4, r5
|
||||
mov sp, r4
|
||||
#else
|
||||
add r2, sp, r0, LSL #2 /* End of args */
|
||||
mov r3, sp /* Start of args */
|
||||
.LC13: cmp r2, r3
|
||||
ldrhi r4,[r2, #-4] /* Reverse ends of list */
|
||||
ldrhi r5, [r3]
|
||||
strhi r5, [r2, #-4]!
|
||||
strhi r4, [r3], #4
|
||||
bhi .LC13
|
||||
/* Ensure doubleword stack alignment. */
|
||||
bic sp, sp, #7
|
||||
#endif
|
||||
#endif
|
||||
|
||||
mov r0, #0
|
||||
bl FUNCTION (boot_card)
|
||||
|
||||
#if defined(__thumb__) && !defined(__thumb2__)
|
||||
/* Come out of Thumb mode. This code should be redundant. */
|
||||
|
||||
mov a4, pc
|
||||
bx a4
|
||||
|
||||
.code 32
|
||||
.global change_back
|
||||
change_back:
|
||||
/* Halt the execution. This code should never be executed. */
|
||||
/* With no debug monitor, this probably aborts (eventually).
|
||||
With a Demon debug monitor, this halts cleanly.
|
||||
With an Angel debug monitor, this will report 'Unknown SWI'. */
|
||||
swi SWI_Exit
|
||||
#endif
|
||||
|
||||
/* For Thumb, constants must be after the code since only
|
||||
positive offsets are supported for PC relative addresses. */
|
||||
|
||||
.align 0
|
||||
.LC0:
|
||||
#ifdef ARM_RDI_MONITOR
|
||||
.word HeapBase
|
||||
#else
|
||||
#ifndef ARM_RDP_MONITOR
|
||||
/* Changes by toralf: Provide alternative "stack" variable whose value
|
||||
may be defined externally; .Lstack will be used instead of .LC0 if
|
||||
it points to a non-0 value. Also set up references to "hooks" that
|
||||
may be used by the application to provide additional init code. */
|
||||
|
||||
#ifdef __pe__
|
||||
.word 0x800000
|
||||
#else
|
||||
.word 0x80000 /* Top of RAM on the PIE board. */
|
||||
#endif
|
||||
.Lstack:
|
||||
.word __stack
|
||||
.Lhwinit:
|
||||
.word FUNCTION (hardware_init_hook)
|
||||
.Lswinit:
|
||||
.word FUNCTION (software_init_hook)
|
||||
|
||||
/* Set up defaults for the above variables in the form of weak symbols
|
||||
- so that application will link correctly, and get value 0 in
|
||||
runtime (meaning "ignore setting") for the variables, when the user
|
||||
does not provide the symbols. (The linker uses a weak symbol if,
|
||||
and only if, a normal version of the same symbol isn't provided
|
||||
e.g. by a linker script or another object file.) */
|
||||
|
||||
.weak __stack
|
||||
.weak FUNCTION (hardware_init_hook)
|
||||
.weak FUNCTION (software_init_hook)
|
||||
#endif
|
||||
|
||||
#endif
|
||||
#if defined(__ELF__) && !defined(__USING_SJLJ_EXCEPTIONS__)
|
||||
/* Protect against unhandled exceptions. */
|
||||
.cantunwind
|
||||
.fnend
|
||||
#endif
|
||||
.LC1:
|
||||
.word bsp_section_bss_begin
|
||||
.LC2:
|
||||
.word bsp_section_bss_end
|
||||
#ifdef __USES_INITFINI__
|
||||
.Lfini:
|
||||
.word FUNCTION(_fini)
|
||||
#endif
|
||||
#ifdef ARM_RDI_MONITOR
|
||||
.LC30:
|
||||
.word CommandLine
|
||||
.word 255
|
||||
|
||||
/* Workspace for Angel calls. */
|
||||
.data
|
||||
/* Data returned by monitor SWI. */
|
||||
.global __stack_base__
|
||||
HeapBase: .word 0
|
||||
HeapLimit: .word 0
|
||||
__stack_base__: .word 0
|
||||
StackLimit: .word 0
|
||||
CommandLine: .space 256,0 /* Maximum length of 255 chars handled. */
|
||||
#endif
|
||||
|
||||
#ifdef __pe__
|
||||
.section .idata$3
|
||||
.long 0,0,0,0,0,0,0,0
|
||||
#endif
|
||||
Reference in New Issue
Block a user