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authorJoel Sherrill <joel.sherrill@OARcorp.com>2005-07-06 18:46:04 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2005-07-06 18:46:04 +0000
commit3c7ed6b8cd505f696c9c2b6d90723094f334b348 (patch)
tree30da596d32865c2d042ece5735d16baeade7d17d /c/src/lib/libbsp/arm/gba/startup/cpu.c
parente9b4f29a409d9dc192a85dbbe693aeb1fa87e43b (diff)
downloadrtems-3c7ed6b8cd505f696c9c2b6d90723094f334b348.tar.bz2
2005-07-06 Markku Puro <markku.puro@kopteri.net>
* .cvsignore, ChangeLog, Makefile.am, README, bsp_specs, configure.ac, clock/clockdrv.c, console/conio.c, console/console.c, console/defaultfont.c, include/arm_mode_bits.h, include/asm_macros.h, include/bsp.h, include/bspopts.h.in, include/conio.h, include/gba.h, include/gba_registers.h, include/tm27.h, irq/bsp_irq_asm.S, irq/bsp_irq_init.c, irq/irq.c, irq/irq.h, irq/irq_asm.S, irq/irq_init.c, start/logo.S, start/start.S, startup/bspstart.c, startup/cpu.c, startup/cpu_asm.S, startup/exit.c, startup/linkcmds, timer/timer.c: New files.
Diffstat (limited to 'c/src/lib/libbsp/arm/gba/startup/cpu.c')
-rw-r--r--c/src/lib/libbsp/arm/gba/startup/cpu.c170
1 files changed, 170 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/gba/startup/cpu.c b/c/src/lib/libbsp/arm/gba/startup/cpu.c
new file mode 100644
index 0000000000..3ce8e5de42
--- /dev/null
+++ b/c/src/lib/libbsp/arm/gba/startup/cpu.c
@@ -0,0 +1,170 @@
+/**
+ * @file cpu.c
+ *
+ * ARM CPU Dependent Source.
+ */
+/*
+ * RTEMS GBA BSP
+ *
+ * COPYRIGHT (c) 2000 Canon Research Centre France SA.
+ * Emmanuel Raguet, mailto:raguet@crf.canon.fr
+ *
+ * Copyright (c) 2002 Advent Networks, Inc
+ * Jay Monkman <jmonkman@adventnetworks.com>
+ *
+ * Copyright (c) 2004
+ * Markku Puro <markku.puro@kopteri.net>
+ *
+ * The license and distribution terms for this file may be
+ * found in found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ *
+ * $Id$
+ */
+#include <stdint.h>
+#include <rtems/system.h>
+#include <rtems.h>
+#include <rtems/bspIo.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/wkspace.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/cpu.h>
+#include <arm_mode_bits.h>
+
+/**
+ * @brief _CPU_Initialize routine performs processor dependent initialization
+ *
+ * @param cpu_table CPU table to initialize
+ * @param thread_dispatch address of ISR disptaching routine (unused)
+ * @return None
+ */
+void _CPU_Initialize(
+ rtems_cpu_table *cpu_table,
+ void (*thread_dispatch) /* ignored on this CPU */
+)
+{
+ _CPU_Table = *cpu_table;
+}
+
+/**
+ * @brief _CPU_ISR_Get_level returns the current interrupt level
+ *
+ * @param None
+ * @return int level
+ */
+uint32_t _CPU_ISR_Get_level( void )
+{
+ uint32_t reg = 0; /* to avoid warning */
+
+ asm volatile ("mrs %0, cpsr \n" \
+ "and %0, %0, #0xc0 \n" \
+ : "=r" (reg) \
+ : "0" (reg) );
+ return reg;
+}
+
+
+/**
+ * @brief _CPU_ISR_install_vector kernel routine installs the RTEMS handler for the
+ * specified vector
+ *
+ * @param vector interrupt vector number
+ * @param new_handler replacement ISR for this vector number
+ * @param old_handler pointer to store former ISR for this vector number
+ * @return None
+ *
+ * @todo Can't use exception vectors in GBA because they are already in GBA ROM BIOS!!
+ */
+extern __inline__ void _CPU_ISR_install_vector(uint32_t vector, proc_ptr new_handler, proc_ptr *old_handler);
+
+/**
+ * @brief _CPU_Context_Initialize kernel routine initialize the specified context
+ *
+ * @param the_context
+ * @param stack_base
+ * @param size
+ * @param new_level
+ * @param entry_point
+ * @param is_fp
+ * @return None
+ */
+void _CPU_Context_Initialize(
+ Context_Control *the_context,
+ uint32_t *stack_base,
+ uint32_t size,
+ uint32_t new_level,
+ void *entry_point,
+ boolean is_fp
+)
+{
+ the_context->register_sp = (uint32_t)stack_base + size ;
+ the_context->register_lr = (uint32_t)entry_point;
+ the_context->register_cpsr = new_level | ModePriv;
+}
+
+
+/**
+ * @brief _CPU_Install_interrupt_stack function is empty since the BSP must set up the interrupt stacks.
+ *
+ * @todo Can't use exception vectors in GBA because they are already in GBA ROM BIOS!!
+ */
+extern __inline__ void _CPU_Install_interrupt_stack( void );
+
+/**
+ * @brief _defaultExcHandler function is empty
+ *
+ * @todo Can't use exception vectors in GBA because they are already in GBA ROM BIOS!!
+ */
+extern void _defaultExcHandler (CPU_Exception_frame *ctx);
+
+/**
+ * @brief _currentExcHandler function is empty (_defaultExcHandler)
+ *
+ * @todo Can't use exception vectors in GBA because they are already in GBA ROM BIOS!!
+ */
+cpuExcHandlerType _currentExcHandler = _defaultExcHandler;
+/*
+extern void _Exception_Handler_Undef_Swi();
+extern void _Exception_Handler_Abort();
+extern void _exc_data_abort();
+*/
+
+/**
+ * @brief rtems_exception_init_mngt function is empty since the BSP must set up the interrupt stacks.
+ *
+ * @todo Can't use exception vectors in GBA because they are already in GBA ROM BIOS!!
+ */
+extern __inline__ void rtems_exception_init_mngt();
+
+
+/**
+ * @brief do_data_abort function is empty
+ *
+ * This function figure out what caused the data abort
+ *
+ * @todo Can't use exception vectors in GBA because they are already in GBA ROM BIOS!!
+ * This function is supposed to figure out what caused the data abort, do that, then return.
+ * All unhandled instructions cause the system to hang.
+ */
+extern __inline__ void do_data_abort(uint32_t insn, uint32_t spsr, CPU_Exception_frame *ctx);
+
+
+/* @todo Can't use exception vectors in GBA because they are already in GBA ROM BIOS!! */
+/* @todo Remove dummy functions needed by linker
+ ****************************************************************************************/
+/* @cond INCLUDE_ASM */
+asm (" .text");
+asm (" .arm");
+asm (" .global _CPU_ISR_install_vector");
+asm ("_CPU_ISR_install_vector:");
+asm (" .global _CPU_Install_interrupt_stack");
+asm ("_CPU_Install_interrupt_stack:");
+asm (" .global _defaultExcHandler");
+asm ("_defaultExcHandler:");
+asm (" .global rtems_exception_init_mngt");
+asm ("rtems_exception_init_mngt:");
+asm (" .global do_data_abort");
+asm ("do_data_abort:");
+asm (" mov pc, lr");
+/* @endcond */
+