1 | /** |
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2 | * @file |
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3 | * @ingroup sparc_leon3 |
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4 | * @brief LEON3 SMP BSP Support |
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5 | */ |
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6 | |
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7 | /* |
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8 | * COPYRIGHT (c) 1989-2011. |
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9 | * On-Line Applications Research Corporation (OAR). |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.rtems.org/license/LICENSE. |
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14 | */ |
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15 | |
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16 | #include <bsp.h> |
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17 | #include <bsp/bootcard.h> |
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18 | #include <bsp/fatal.h> |
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19 | #include <cache_.h> |
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20 | #include <leon.h> |
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21 | #include <rtems/bspIo.h> |
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22 | #include <rtems/score/smpimpl.h> |
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23 | #include <stdlib.h> |
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24 | |
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25 | #if !defined(__leon__) || defined(RTEMS_PARAVIRT) |
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26 | uint32_t _CPU_SMP_Get_current_processor( void ) |
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27 | { |
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28 | return _LEON3_Get_current_processor(); |
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29 | } |
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30 | #endif |
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31 | |
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32 | static rtems_isr bsp_inter_processor_interrupt( |
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33 | rtems_vector_number vector |
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34 | ) |
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35 | { |
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36 | _SMP_Inter_processor_interrupt_handler(); |
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37 | } |
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38 | |
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39 | void bsp_start_on_secondary_processor() |
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40 | { |
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41 | uint32_t cpu_index_self = _CPU_SMP_Get_current_processor(); |
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42 | |
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43 | /* |
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44 | * If data cache snooping is not enabled we terminate using BSP_fatal_exit() |
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45 | * instead of bsp_fatal(). This is done since the latter function tries to |
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46 | * acquire a ticket lock, an operation which requires data cache snooping to |
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47 | * be enabled. |
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48 | */ |
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49 | if ( !leon3_data_cache_snooping_enabled() ) |
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50 | BSP_fatal_exit( LEON3_FATAL_INVALID_CACHE_CONFIG_SECONDARY_PROCESSOR ); |
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51 | |
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52 | /* Unmask IPI interrupts at Interrupt controller for this CPU */ |
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53 | LEON3_IrqCtrl_Regs->mask[cpu_index_self] |= 1U << LEON3_mp_irq; |
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54 | |
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55 | _SMP_Start_multitasking_on_secondary_processor(); |
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56 | } |
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57 | |
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58 | uint32_t _CPU_SMP_Initialize( void ) |
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59 | { |
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60 | if ( !leon3_data_cache_snooping_enabled() ) |
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61 | bsp_fatal( LEON3_FATAL_INVALID_CACHE_CONFIG_MAIN_PROCESSOR ); |
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62 | |
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63 | if ( rtems_configuration_get_maximum_processors() > 1 ) { |
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64 | LEON_Unmask_interrupt(LEON3_mp_irq); |
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65 | set_vector(bsp_inter_processor_interrupt, LEON_TRAP_TYPE(LEON3_mp_irq), 1); |
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66 | } |
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67 | |
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68 | return leon3_get_cpu_count(LEON3_IrqCtrl_Regs); |
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69 | } |
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70 | |
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71 | bool _CPU_SMP_Start_processor( uint32_t cpu_index ) |
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72 | { |
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73 | #if defined(RTEMS_DEBUG) |
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74 | printk( "Waking CPU %d\n", cpu_index ); |
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75 | #endif |
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76 | |
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77 | LEON3_IrqCtrl_Regs->mpstat = 1U << cpu_index; |
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78 | |
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79 | return true; |
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80 | } |
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81 | |
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82 | void _CPU_SMP_Finalize_initialization( uint32_t cpu_count ) |
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83 | { |
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84 | (void) cpu_count; |
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85 | |
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86 | /* Nothing to do */ |
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87 | } |
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88 | |
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89 | void _CPU_SMP_Prepare_start_multitasking( void ) |
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90 | { |
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91 | _CPU_cache_invalidate_entire_instruction(); |
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92 | } |
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93 | |
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94 | void _CPU_SMP_Send_interrupt(uint32_t target_processor_index) |
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95 | { |
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96 | /* send interrupt to destination CPU */ |
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97 | LEON3_IrqCtrl_Regs->force[target_processor_index] = 1 << LEON3_mp_irq; |
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98 | } |
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