[f7f1d77] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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| 4 | * @brief Allocate and Initialize Per CPU Structures |
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| 5 | * @ingroup PerCPU |
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| 6 | */ |
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| 7 | |
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[11e8bc5] | 8 | /* |
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[06dcaf0] | 9 | * COPYRIGHT (c) 1989-2011. |
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[11e8bc5] | 10 | * On-Line Applications Research Corporation (OAR). |
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| 11 | * |
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| 12 | * The license and distribution terms for this file may be |
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| 13 | * found in the file LICENSE in this distribution or at |
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| 14 | * http://www.rtems.com/license/LICENSE. |
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| 15 | */ |
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| 16 | |
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| 17 | #if HAVE_CONFIG_H |
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| 18 | #include "config.h" |
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| 19 | #endif |
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| 20 | |
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| 21 | #include <rtems/system.h> |
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| 22 | #include <rtems/score/thread.h> |
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| 23 | #include <rtems/score/percpu.h> |
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| 24 | #include <rtems/score/wkspace.h> |
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| 25 | #include <rtems/config.h> |
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| 26 | #include <string.h> |
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| 27 | |
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[06dcaf0] | 28 | #if defined(RTEMS_SMP) |
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[42bb344e] | 29 | |
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| 30 | #include <rtems/score/smp.h> |
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| 31 | |
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[06dcaf0] | 32 | void _SMP_Handler_initialize(void) |
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| 33 | { |
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[baf8f4d] | 34 | uint32_t max_cpus = rtems_configuration_get_maximum_processors(); |
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| 35 | uint32_t cpu; |
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[06dcaf0] | 36 | |
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| 37 | /* |
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| 38 | * Initialize per cpu pointer table |
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| 39 | */ |
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| 40 | _Per_CPU_Information_p[0] = &_Per_CPU_Information[0]; |
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[baf8f4d] | 41 | for ( cpu = 1 ; cpu < max_cpus; ++cpu ) { |
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[c26dd0d] | 42 | |
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[06dcaf0] | 43 | Per_CPU_Control *p = &_Per_CPU_Information[cpu]; |
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| 44 | |
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| 45 | _Per_CPU_Information_p[cpu] = p; |
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| 46 | |
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[10643e9] | 47 | #if CPU_ALLOCATE_INTERRUPT_STACK == TRUE |
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| 48 | { |
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| 49 | size_t size = rtems_configuration_get_interrupt_stack_size(); |
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| 50 | uintptr_t ptr; |
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| 51 | |
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| 52 | p->interrupt_stack_low = _Workspace_Allocate_or_fatal_error( size ); |
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| 53 | |
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| 54 | ptr = (uintptr_t) _Addresses_Add_offset( p->interrupt_stack_low, size ); |
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| 55 | ptr &= ~(CPU_STACK_ALIGNMENT - 1); |
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| 56 | p->interrupt_stack_high = (void *)ptr; |
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| 57 | } |
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| 58 | #endif |
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[06dcaf0] | 59 | |
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| 60 | p->state = RTEMS_BSP_SMP_CPU_INITIAL_STATE; |
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| 61 | RTEMS_COMPILER_MEMORY_BARRIER(); |
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| 62 | } |
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[baf8f4d] | 63 | |
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| 64 | /* |
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| 65 | * Discover and initialize the secondary cores in an SMP system. |
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| 66 | */ |
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| 67 | max_cpus = bsp_smp_initialize( max_cpus ); |
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| 68 | |
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| 69 | _SMP_Processor_count = max_cpus; |
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[06dcaf0] | 70 | } |
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| 71 | #else |
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| 72 | /* |
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| 73 | * On single core systems, we can efficiently directly access a single |
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| 74 | * statically allocated per cpu structure. And the fields are initialized |
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| 75 | * as individual elements just like it has always been done. |
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| 76 | */ |
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| 77 | Per_CPU_Control _Per_CPU_Information[1]; |
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| 78 | #endif |
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