diff options
Diffstat (limited to 'cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h')
| -rw-r--r-- | cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h b/cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h index 31ec0ac8bb..71f2679dde 100644 --- a/cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h +++ b/cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h @@ -80,6 +80,32 @@ RTEMS_INLINE_ROUTINE void _CPU_Instruction_no_operation( void ) __asm__ volatile ( "nop" ); } +RTEMS_INLINE_ROUTINE void _CPU_Use_thread_local_storage( + const Context_Control *context +) +{ + uint32_t tmp; + uint32_t cpu_index; + +#ifdef RTEMS_SMP + cpu_index = _CPU_SMP_Get_current_processor(); +#else + cpu_index = 0; +#endif + + __asm__ volatile ( + "movl " RTEMS_XSTRING( I386_CONTEXT_CONTROL_GS_0_OFFSET ) "(%2), %0\n" + "movl %0, _Global_descriptor_table+24(,%1,8)\n" + "movl " RTEMS_XSTRING( I386_CONTEXT_CONTROL_GS_1_OFFSET ) "(%2), %0\n" + "movl %0, _Global_descriptor_table+28(,%1,8)\n" + "leal 24(,%1,8), %0\n" + "movl %0, %%gs\n" + : "=&r" ( tmp ) + : "r" ( cpu_index ), "r" ( context ) + : "memory" + ); +} + #ifdef __cplusplus } #endif |