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0e5b446af7
* Makefile.am, preinstall.am, rtems/score/cpu.h: Now performs context switches and many tests run. * context_init.c, context_switch.S, cpu.c, cpu_asm.c: New files.
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/*
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* COPYRIGHT (c) 1989-2008.
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* On-Line Applications Research Corporation (OAR).
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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.com/license/LICENSE.
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*
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* $Id$
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*/
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#include <stdint.h>
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#include <rtems/system.h>
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typedef struct {
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uint32_t marker;
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} Starting_Frame;
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#define _get_r12( _r12 ) \
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asm volatile( "mv r12, %0" : "=r" (_r12))
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void _CPU_Context_Initialize(
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Context_Control *the_context,
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uint32_t *stack_base,
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uint32_t size,
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uint32_t new_level,
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void *entry_point,
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bool is_fp
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)
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{
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void *stackEnd = stack_base;
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Starting_Frame *frame;
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uint32_t r12;
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stackEnd += size;
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frame = (Starting_Frame *)stackEnd;
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frame--;
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frame->marker = 0xa5a5a5a5;
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_get_r12( r12 );
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the_context->r8 = 0x88888888;
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the_context->r9 = 0x99999999;
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the_context->r10 = 0xaaaaaaaa;
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the_context->r11 = 0xbbbbbbbb;
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the_context->r12 = r12;
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the_context->r13_fp = 0;
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the_context->r14_lr = (uintptr_t) entry_point;
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the_context->r15_sp = (uintptr_t) frame;
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}
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