source: rtems/c/src/lib/libbsp/sparc/leon3/startup/bspsmp.c @ fecaeca1

4.115
Last change on this file since fecaeca1 was fecaeca1, checked in by Daniel Cederman <cederman@…>, on Aug 25, 2014 at 10:59:34 AM

score: Define _CPU_Start_multitasking only for LEON SPARC, not SPARC in general

Rename _BSP_Start_multitasking to _LEON3_Start_multitasking to show that
it is LEON specific

  • Property mode set to 100644
File size: 2.0 KB
Line 
1/**
2 * @file
3 * @ingroup sparc_leon3
4 * @brief LEON3 SMP BSP Support
5 */
6
7/*
8 *  COPYRIGHT (c) 1989-2011.
9 *  On-Line Applications Research Corporation (OAR).
10 *
11 *  The license and distribution terms for this file may be
12 *  found in the file LICENSE in this distribution or at
13 *  http://www.rtems.org/license/LICENSE.
14 */
15
16#include <bsp.h>
17#include <bsp/bootcard.h>
18#include <cache_.h>
19#include <leon.h>
20#include <rtems/bspIo.h>
21#include <rtems/score/smpimpl.h>
22#include <stdlib.h>
23
24#if !defined(__leon__) || defined(RTEMS_PARAVIRT)
25uint32_t _CPU_SMP_Get_current_processor( void )
26{
27  return _LEON3_Get_current_processor();
28}
29#endif
30
31static rtems_isr bsp_inter_processor_interrupt(
32  rtems_vector_number vector
33)
34{
35  _SMP_Inter_processor_interrupt_handler();
36}
37
38void bsp_start_on_secondary_processor()
39{
40  uint32_t cpu_index_self = _CPU_SMP_Get_current_processor();
41
42  leon3_set_cache_control_register(0x80000F);
43  /* Unmask IPI interrupts at Interrupt controller for this CPU */
44  LEON3_IrqCtrl_Regs->mask[cpu_index_self] |= 1U << LEON3_MP_IRQ;
45
46  _SMP_Start_multitasking_on_secondary_processor();
47}
48
49uint32_t _CPU_SMP_Initialize( void )
50{
51  leon3_set_cache_control_register(0x80000F);
52
53  if ( rtems_configuration_get_maximum_processors() > 1 ) {
54    LEON_Unmask_interrupt(LEON3_MP_IRQ);
55    set_vector(bsp_inter_processor_interrupt, LEON_TRAP_TYPE(LEON3_MP_IRQ), 1);
56  }
57
58  return leon3_get_cpu_count(LEON3_IrqCtrl_Regs);
59}
60
61bool _CPU_SMP_Start_processor( uint32_t cpu_index )
62{
63  #if defined(RTEMS_DEBUG)
64    printk( "Waking CPU %d\n", cpu_index );
65  #endif
66
67  LEON3_IrqCtrl_Regs->mpstat = 1U << cpu_index;
68
69  return true;
70}
71
72void _CPU_SMP_Finalize_initialization( uint32_t cpu_count )
73{
74  (void) cpu_count;
75
76  /* Nothing to do */
77}
78
79void _CPU_SMP_Send_interrupt(uint32_t target_processor_index)
80{
81  /* send interrupt to destination CPU */
82  LEON3_IrqCtrl_Regs->force[target_processor_index] = 1 << LEON3_MP_IRQ;
83}
84
85void _LEON3_Start_multitasking(
86  Context_Control *heir
87)
88{
89  _CPU_cache_invalidate_entire_instruction();
90  _CPU_Context_Restart_self( heir );
91}
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