diff options
Diffstat (limited to 'cpukit/score/cpu/sparc/cpu.c')
| -rw-r--r-- | cpukit/score/cpu/sparc/cpu.c | 65 |
1 files changed, 45 insertions, 20 deletions
diff --git a/cpukit/score/cpu/sparc/cpu.c b/cpukit/score/cpu/sparc/cpu.c index 5bea27fda5..8916a7d988 100644 --- a/cpukit/score/cpu/sparc/cpu.c +++ b/cpukit/score/cpu/sparc/cpu.c @@ -8,6 +8,8 @@ * COPYRIGHT (c) 1989-2007. * On-Line Applications Research Corporation (OAR). * + * Copyright (c) 2017 embedded brains GmbH + * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.rtems.org/license/LICENSE. @@ -21,6 +23,7 @@ #include <rtems/score/isr.h> #include <rtems/score/percpu.h> #include <rtems/score/tls.h> +#include <rtems/score/thread.h> #include <rtems/rtems/cache.h> #if SPARC_HAS_FPU == 1 @@ -29,6 +32,14 @@ == SPARC_PER_CPU_FSR_OFFSET, SPARC_PER_CPU_FSR_OFFSET ); + + #if defined(SPARC_USE_LAZY_FP_SWITCH) + RTEMS_STATIC_ASSERT( + offsetof( Per_CPU_Control, cpu_per_cpu.fp_owner) + == SPARC_PER_CPU_FP_OWNER_OFFSET, + SPARC_PER_CPU_FP_OWNER_OFFSET + ); + #endif #endif #define SPARC_ASSERT_OFFSET(field, off) \ @@ -99,6 +110,30 @@ SPARC_ASSERT_ISF_OFFSET(i7, I7); SPARC_ASSERT_ISF_OFFSET(y, Y); SPARC_ASSERT_ISF_OFFSET(tpc, TPC); +#define SPARC_ASSERT_FP_OFFSET(field, off) \ + RTEMS_STATIC_ASSERT( \ + offsetof(Context_Control_fp, field) == SPARC_FP_CONTEXT_OFFSET_ ## off, \ + Context_Control_fp_offset_ ## field \ + ) + +SPARC_ASSERT_FP_OFFSET(f0_f1, F0_F1); +SPARC_ASSERT_FP_OFFSET(f2_f3, F2_F3); +SPARC_ASSERT_FP_OFFSET(f4_f5, F4_F5); +SPARC_ASSERT_FP_OFFSET(f6_f7, F6_F7); +SPARC_ASSERT_FP_OFFSET(f8_f9, F8_F9); +SPARC_ASSERT_FP_OFFSET(f10_f11, F10_F11); +SPARC_ASSERT_FP_OFFSET(f12_f13, F12_F13); +SPARC_ASSERT_FP_OFFSET(f14_f15, F14_F15); +SPARC_ASSERT_FP_OFFSET(f16_f17, F16_F17); +SPARC_ASSERT_FP_OFFSET(f18_f19, F18_F19); +SPARC_ASSERT_FP_OFFSET(f20_f21, F20_F21); +SPARC_ASSERT_FP_OFFSET(f22_f23, F22_F23); +SPARC_ASSERT_FP_OFFSET(f24_f25, F24_F25); +SPARC_ASSERT_FP_OFFSET(f26_f27, F26_F27); +SPARC_ASSERT_FP_OFFSET(f28_f29, F28_F29); +SPARC_ASSERT_FP_OFFSET(f30_f31, F30_F31); +SPARC_ASSERT_FP_OFFSET(fsr, FSR); + RTEMS_STATIC_ASSERT( sizeof(SPARC_Minimum_stack_frame) == SPARC_MINIMUM_STACK_FRAME_SIZE, SPARC_MINIMUM_STACK_FRAME_SIZE @@ -110,10 +145,6 @@ RTEMS_STATIC_ASSERT( CPU_Interrupt_frame_alignment ); -#if (SPARC_HAS_FPU == 1) && !defined(SPARC_USE_SYNCHRONOUS_FP_SWITCH) -Context_Control_fp _CPU_Null_fp_context; -#endif - /* * _CPU_Initialize * @@ -129,22 +160,16 @@ Context_Control_fp _CPU_Null_fp_context; void _CPU_Initialize(void) { -#if (SPARC_HAS_FPU == 1) && !defined(SPARC_USE_SYNCHRONOUS_FP_SWITCH) - Context_Control_fp *pointer; - uint32_t psr; - - sparc_get_psr( psr ); - psr |= SPARC_PSR_EF_MASK; - sparc_set_psr( psr ); - - /* - * This seems to be the most appropriate way to obtain an initial - * FP context on the SPARC. The NULL fp context is copied it to - * the task's FP context during Context_Initialize. - */ - - pointer = &_CPU_Null_fp_context; - _CPU_Context_save_fp( &pointer ); +#if defined(SPARC_USE_LAZY_FP_SWITCH) + __asm__ volatile ( + ".global SPARC_THREAD_CONTROL_REGISTERS_FP_CONTEXT_OFFSET\n" + ".set SPARC_THREAD_CONTROL_REGISTERS_FP_CONTEXT_OFFSET, %0\n" + ".global SPARC_THREAD_CONTROL_FP_CONTEXT_OFFSET\n" + ".set SPARC_THREAD_CONTROL_FP_CONTEXT_OFFSET, %1\n" + : + : "i" (offsetof(Thread_Control, Registers.fp_context)), + "i" (offsetof(Thread_Control, fp_context)) + ); #endif } |