[11e8bc5] | 1 | /* |
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[06dcaf0] | 2 | * COPYRIGHT (c) 1989-2011. |
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[11e8bc5] | 3 | * On-Line Applications Research Corporation (OAR). |
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| 4 | * |
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| 5 | * The license and distribution terms for this file may be |
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| 6 | * found in the file LICENSE in this distribution or at |
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| 7 | * http://www.rtems.com/license/LICENSE. |
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| 8 | * |
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| 9 | * $Id$ |
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| 10 | */ |
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| 11 | |
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| 12 | #if HAVE_CONFIG_H |
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| 13 | #include "config.h" |
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| 14 | #endif |
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| 15 | |
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| 16 | #include <rtems/system.h> |
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| 17 | #include <rtems/score/thread.h> |
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| 18 | #include <rtems/score/percpu.h> |
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| 19 | #include <rtems/score/wkspace.h> |
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| 20 | #include <rtems/config.h> |
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| 21 | #include <string.h> |
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| 22 | |
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[06dcaf0] | 23 | #if defined(RTEMS_SMP) |
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[42bb344e] | 24 | |
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| 25 | #include <rtems/score/smp.h> |
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| 26 | |
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[06dcaf0] | 27 | void _SMP_Handler_initialize(void) |
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| 28 | { |
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| 29 | int cpu; |
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| 30 | size_t size; |
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| 31 | uintptr_t ptr; |
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| 32 | |
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| 33 | /* |
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| 34 | * Initialize per CPU structures. |
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| 35 | */ |
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| 36 | size = (_SMP_Processor_count) * sizeof(Per_CPU_Control); |
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| 37 | memset( _Per_CPU_Information, '\0', size ); |
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| 38 | |
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| 39 | /* |
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| 40 | * Initialize per cpu pointer table |
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| 41 | */ |
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| 42 | size = Configuration.interrupt_stack_size; |
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| 43 | _Per_CPU_Information_p[0] = &_Per_CPU_Information[0]; |
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[e79093a] | 44 | for (cpu=1 ; cpu < rtems_configuration_smp_maximum_processors; cpu++ ) { |
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[c26dd0d] | 45 | |
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[06dcaf0] | 46 | Per_CPU_Control *p = &_Per_CPU_Information[cpu]; |
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| 47 | |
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| 48 | _Per_CPU_Information_p[cpu] = p; |
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| 49 | |
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| 50 | p->interrupt_stack_low = _Workspace_Allocate_or_fatal_error( size ); |
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| 51 | |
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| 52 | ptr = (uintptr_t) _Addresses_Add_offset( p->interrupt_stack_low, size ); |
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| 53 | ptr &= ~CPU_STACK_ALIGNMENT; |
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| 54 | p->interrupt_stack_high = (void *)ptr; |
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| 55 | p->state = RTEMS_BSP_SMP_CPU_INITIAL_STATE; |
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| 56 | RTEMS_COMPILER_MEMORY_BARRIER(); |
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| 57 | } |
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| 58 | } |
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| 59 | #else |
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| 60 | /* |
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| 61 | * On single core systems, we can efficiently directly access a single |
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| 62 | * statically allocated per cpu structure. And the fields are initialized |
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| 63 | * as individual elements just like it has always been done. |
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| 64 | */ |
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| 65 | Per_CPU_Control _Per_CPU_Information[1]; |
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| 66 | #endif |
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