diff options
Diffstat (limited to 'c/src/exec/score/cpu/c4x/cpu_asm.S')
| -rw-r--r-- | c/src/exec/score/cpu/c4x/cpu_asm.S | 770 |
1 files changed, 0 insertions, 770 deletions
diff --git a/c/src/exec/score/cpu/c4x/cpu_asm.S b/c/src/exec/score/cpu/c4x/cpu_asm.S deleted file mode 100644 index 9dbc227563..0000000000 --- a/c/src/exec/score/cpu/c4x/cpu_asm.S +++ /dev/null @@ -1,770 +0,0 @@ -/* cpu_asm.c ===> cpu_asm.S or cpu_asm.s - * - * This file contains the basic algorithms for all assembly code used - * in an specific CPU port of RTEMS. These algorithms must be implemented - * in assembly language - * - * NOTE: This is supposed to be a .S or .s file NOT a C file. - * - * COPYRIGHT (c) 1989-1999. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.OARcorp.com/rtems/license.html. - * - * $Id$ - */ - -#include <asm.h> - -/* - * _CPU_Context_save_fp_context - * - * This routine is responsible for saving the FP context - * at *fp_context_ptr. If the point to load the FP context - * from is changed then the pointer is modified by this routine. - * - * Sometimes a macro implementation of this is in cpu.h which dereferences - * the ** and a similarly named routine in this file is passed something - * like a (Context_Control_fp *). The general rule on making this decision - * is to avoid writing assembly language. - * - * void _CPU_Context_save_fp( - * void **fp_context_ptr - * - * C4x Specific Information: - * - * There is no distiniction between FP and integer context in this port. - */ - -/* - * _CPU_Context_restore_fp_context - * - * This routine is responsible for restoring the FP context - * at *fp_context_ptr. If the point to load the FP context - * from is changed then the pointer is modified by this routine. - * - * Sometimes a macro implementation of this is in cpu.h which dereferences - * the ** and a similarly named routine in this file is passed something - * like a (Context_Control_fp *). The general rule on making this decision - * is to avoid writing assembly language. - * - * void _CPU_Context_restore_fp( - * void **fp_context_ptr - * ) - * - * C4x Specific Information: - * - * There is no distiniction between FP and integer context in this port. - */ - - -/* _CPU_Context_switch - * - * This routine performs a normal non-FP context switch. - * - * void _CPU_Context_switch( - * Context_Control *run, - * Context_Control *heir - * ) - * - * TMS320C3x General-Purpose Applications User's Guide, section 2.4 - * (p 2-11 and following), Context Switching in Interrupts and - * Subroutines states that "If the program is in a subroutine, it - * must preserve the dedicated C registers as follows:" - * - * Save as Integers Save as Floating-Point - * ================ ====================== - * R4 R8 R6 R7 - * AR4 AR5 - * AR6 AR7 - * FP DP (small model only) - * SP - */ - - .global SYM(_CPU_Context_switch) -SYM(_CPU_Context_switch): - .if .REGPARM == 0 - ldi sp, ar0 - ldi *ar0, ar2 ; get the location of running context - .endif - sti st,*ar2++ ; store status word - sti ar3,*ar2++ ; store ar3 - sti ar4,*ar2++ ; store ar4 - sti ar5,*ar2++ ; store ar5 - sti ar6,*ar2++ ; store ar6 - sti ar7,*ar2++ ; store ar7 - sti r4,*ar2++ ; store integer portion of r4 - sti r5,*ar2++ ; store integer portion of r5 - stf r6,*ar2++ ; store float portion of r6 - stf r7,*ar2++ ; store float portion of r7 - .if .TMS320C40 - sti r8,*ar2++ ; store integer portion of r8 - .endif - sti sp,*ar2++ ; store sp - - ; end of save - - .if .REGPARM == 0 - ldi *-ar0(2), ar2 ; get the location of heir context - .else - ldi r2,ar2 - .endif -_local_restore: - ldi *ar2++,ar0 ; load status word into register - ldi *ar2++,ar3 ; load ar3 - ldi *ar2++,ar4 ; load ar4 - ldi *ar2++,ar5 ; load ar5 - ldi *ar2++,ar6 ; load ar6 - ldi *ar2++,ar7 ; load ar7 - ldi *ar2++,r4 ; load integer portion of r4 - ldi *ar2++,r5 ; load integer portion of r5 - ldf *ar2++,r6 ; load float portion of r6 - ldf *ar2++,r7 ; load float portion of r7 - .if .TMS320C40 - ldi *ar2++,r8 ; load integer portion of r8 - .endif - ldi *ar2++,sp ; load sp - ldi ar0,st ; restore status word and interrupts - rets - -/* - * _CPU_Context_restore - * - * This routine is generally used only to restart self in an - * efficient manner. It may simply be a label in _CPU_Context_switch. - * - * NOTE: May be unnecessary to reload some registers. - * - * void _CPU_Context_restore( - * Context_Control *new_context - * ) - */ - - .global SYM(_CPU_Context_restore) -SYM(_CPU_Context_restore): - .if .REGPARM == 0 - ldi sp, ar0 - ldi *ar0, ar2 ; get the location of context to restore - .endif - br _local_restore - -/* void _ISR_Handler() - * - * This routine provides the RTEMS interrupt management. - * - * void _ISR_Handler() - */ - - /* - * At entry to "common" _ISR_Handler, the vector number must be - * available. On some CPUs the hardware puts either the vector - * number or the offset into the vector table for this ISR in a - * known place. If the hardware does not give us this information, - * then the assembly portion of RTEMS for this port will contain - * a set of distinct interrupt entry points which somehow place - * the vector number in a known place (which is safe if another - * interrupt nests this one) and branches to _ISR_Handler. - */ - - /* - * save some or all context on stack - * may need to save some special interrupt information for exit - * - * #if ( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE ) - * if ( _ISR_Nest_level == 0 ) - * switch to software interrupt stack - * #endif - * - * _ISR_Nest_level++; - * - * _Thread_Dispatch_disable_level++; - * - * (*_ISR_Vector_table[ vector ])( vector ); - * - * --_ISR_Nest_level; - * - * if ( _ISR_Nest_level ) - * goto the label "exit interrupt (simple case)" - * - * #if ( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE ) - * restore stack - * #endif - * - * if ( !_Context_Switch_necessary ) - * goto the label "exit interrupt (simple case)" - * - * if ( !_ISR_Signals_to_thread_executing ) - * _ISR_Signals_to_thread_executing = FALSE; - * goto the label "exit interrupt (simple case)" - * - * call _Thread_Dispatch() or prepare to return to _ISR_Dispatch - * - * prepare to get out of interrupt - * return from interrupt (maybe to _ISR_Dispatch) - * - * LABEL "exit interrupt (simple case): - * prepare to get out of interrupt - * return from interrupt - */ - - .global SYM(_ISR_Handler_save_registers) -SYM(_ISR_Handler_save_registers): - ; no push st because it is already pushed - ; no push ar2 because it is already pushed and vector number loaded - push ar0 - push ar1 - push dp - push ir0 - push ir1 - push rs - push re - push rc - push bk - - push r0 - pushf r0 - push r1 - pushf r1 - push r2 - pushf r2 - push r3 - pushf r3 - ; no push r4 because other part of register is in basic context - push r4 - pushf r4 - ; no push r5 because other part of register is in basic context - push r5 - pushf r5 - push r6 - pushf r6 - ; no pushf r6 because other part of register is in basic context - push r7 - pushf r7 - ; no pushf r7 because other part of register is in basic context - .if .TMS320C40 - push r8 - ; no pushf r8 because other part of register is in basic context - push r9 - pushf r9 - push r10 - pushf r10 - push r11 - pushf r11 - .endif - - ldi sp,r2 - call SYM(__ISR_Handler) - - .if .TMS320C40 - popf r11 - pop r11 - popf r10 - pop r10 - popf r9 - pop r9 - ; no popf r8 because other part of register is in basic context - pop r8 - .endif - ; no popf r7 because other part of register is in basic context - popf r7 - pop r7 - ; no popf r6 because other part of register is in basic context - popf r6 - pop r6 - ; no popf r5 because other part of register is in basic context - popf r5 - pop r5 - ; no pop r4 because other part of register is in basic context - popf r4 - pop r4 - popf r3 - pop r3 - popf r2 - pop r2 - popf r1 - pop r1 - popf r0 - pop r0 - - pop bk - pop rc - pop re - pop rs - pop ir1 - pop ir0 - pop dp - pop ar1 - pop ar0 - pop ar2 ; because the vector numbers goes here - pop st - reti - -/* - * Prologues so we can know the vector number. Generated by this script: - * - * i=0 - * while test $i -lt 64 - * do - * - * printf "\t.global\tSYM(rtems_irq_prologue_%X)\n" $i - * printf "SYM(rtems_irq_prologue_%X):\n" $i - * printf "\tpush\tst\n" - * printf "\tpush\tar2\n" - * printf "\tldi\t0x%x,ar2\n" $i - * printf "\tbr\tSYM(_ISR_Handler_save_registers)\n" - * printf "\n" - * i=`expr $i + 1` - * - * done - */ - - .global SYM(rtems_irq_prologue_0) -SYM(rtems_irq_prologue_0): - push st - push ar2 - ldi 0x0,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_1) -SYM(rtems_irq_prologue_1): - push st - push ar2 - ldi 0x1,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_2) -SYM(rtems_irq_prologue_2): - push st - push ar2 - ldi 0x2,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_3) -SYM(rtems_irq_prologue_3): - push st - push ar2 - ldi 0x3,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_4) -SYM(rtems_irq_prologue_4): - push st - push ar2 - ldi 0x4,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_5) -SYM(rtems_irq_prologue_5): - push st - push ar2 - ldi 0x5,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_6) -SYM(rtems_irq_prologue_6): - push st - push ar2 - ldi 0x6,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_7) -SYM(rtems_irq_prologue_7): - push st - push ar2 - ldi 0x7,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_8) -SYM(rtems_irq_prologue_8): - push st - push ar2 - ldi 0x8,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_9) -SYM(rtems_irq_prologue_9): - push st - push ar2 - ldi 0x9,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_A) -SYM(rtems_irq_prologue_A): - push st - push ar2 - ldi 0xa,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_B) -SYM(rtems_irq_prologue_B): - push st - push ar2 - ldi 0xb,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_C) -SYM(rtems_irq_prologue_C): - push st - push ar2 - ldi 0xc,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_D) -SYM(rtems_irq_prologue_D): - push st - push ar2 - ldi 0xd,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_E) -SYM(rtems_irq_prologue_E): - push st - push ar2 - ldi 0xe,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_F) -SYM(rtems_irq_prologue_F): - push st - push ar2 - ldi 0xf,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_10) -SYM(rtems_irq_prologue_10): - push st - push ar2 - ldi 0x10,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_11) -SYM(rtems_irq_prologue_11): - push st - push ar2 - ldi 0x11,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_12) -SYM(rtems_irq_prologue_12): - push st - push ar2 - ldi 0x12,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_13) -SYM(rtems_irq_prologue_13): - push st - push ar2 - ldi 0x13,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_14) -SYM(rtems_irq_prologue_14): - push st - push ar2 - ldi 0x14,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_15) -SYM(rtems_irq_prologue_15): - push st - push ar2 - ldi 0x15,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_16) -SYM(rtems_irq_prologue_16): - push st - push ar2 - ldi 0x16,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_17) -SYM(rtems_irq_prologue_17): - push st - push ar2 - ldi 0x17,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_18) -SYM(rtems_irq_prologue_18): - push st - push ar2 - ldi 0x18,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_19) -SYM(rtems_irq_prologue_19): - push st - push ar2 - ldi 0x19,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_1A) -SYM(rtems_irq_prologue_1A): - push st - push ar2 - ldi 0x1a,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_1B) -SYM(rtems_irq_prologue_1B): - push st - push ar2 - ldi 0x1b,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_1C) -SYM(rtems_irq_prologue_1C): - push st - push ar2 - ldi 0x1c,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_1D) -SYM(rtems_irq_prologue_1D): - push st - push ar2 - ldi 0x1d,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_1E) -SYM(rtems_irq_prologue_1E): - push st - push ar2 - ldi 0x1e,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_1F) -SYM(rtems_irq_prologue_1F): - push st - push ar2 - ldi 0x1f,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_20) -SYM(rtems_irq_prologue_20): - push st - push ar2 - ldi 0x20,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_21) -SYM(rtems_irq_prologue_21): - push st - push ar2 - ldi 0x21,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_22) -SYM(rtems_irq_prologue_22): - push st - push ar2 - ldi 0x22,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_23) -SYM(rtems_irq_prologue_23): - push st - push ar2 - ldi 0x23,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_24) -SYM(rtems_irq_prologue_24): - push st - push ar2 - ldi 0x24,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_25) -SYM(rtems_irq_prologue_25): - push st - push ar2 - ldi 0x25,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_26) -SYM(rtems_irq_prologue_26): - push st - push ar2 - ldi 0x26,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_27) -SYM(rtems_irq_prologue_27): - push st - push ar2 - ldi 0x27,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_28) -SYM(rtems_irq_prologue_28): - push st - push ar2 - ldi 0x28,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_29) -SYM(rtems_irq_prologue_29): - push st - push ar2 - ldi 0x29,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_2A) -SYM(rtems_irq_prologue_2A): - push st - push ar2 - ldi 0x2a,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_2B) -SYM(rtems_irq_prologue_2B): - push st - push ar2 - ldi 0x2b,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_2C) -SYM(rtems_irq_prologue_2C): - push st - push ar2 - ldi 0x2c,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_2D) -SYM(rtems_irq_prologue_2D): - push st - push ar2 - ldi 0x2d,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_2E) -SYM(rtems_irq_prologue_2E): - push st - push ar2 - ldi 0x2e,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_2F) -SYM(rtems_irq_prologue_2F): - push st - push ar2 - ldi 0x2f,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_30) -SYM(rtems_irq_prologue_30): - push st - push ar2 - ldi 0x30,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_31) -SYM(rtems_irq_prologue_31): - push st - push ar2 - ldi 0x31,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_32) -SYM(rtems_irq_prologue_32): - push st - push ar2 - ldi 0x32,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_33) -SYM(rtems_irq_prologue_33): - push st - push ar2 - ldi 0x33,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_34) -SYM(rtems_irq_prologue_34): - push st - push ar2 - ldi 0x34,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_35) -SYM(rtems_irq_prologue_35): - push st - push ar2 - ldi 0x35,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_36) -SYM(rtems_irq_prologue_36): - push st - push ar2 - ldi 0x36,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_37) -SYM(rtems_irq_prologue_37): - push st - push ar2 - ldi 0x37,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_38) -SYM(rtems_irq_prologue_38): - push st - push ar2 - ldi 0x38,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_39) -SYM(rtems_irq_prologue_39): - push st - push ar2 - ldi 0x39,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_3A) -SYM(rtems_irq_prologue_3A): - push st - push ar2 - ldi 0x3a,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_3B) -SYM(rtems_irq_prologue_3B): - push st - push ar2 - ldi 0x3b,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_3C) -SYM(rtems_irq_prologue_3C): - push st - push ar2 - ldi 0x3c,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_3D) -SYM(rtems_irq_prologue_3D): - push st - push ar2 - ldi 0x3d,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_3E) -SYM(rtems_irq_prologue_3E): - push st - push ar2 - ldi 0x3e,ar2 - br SYM(_ISR_Handler_save_registers) - - .global SYM(rtems_irq_prologue_3F) -SYM(rtems_irq_prologue_3F): - push st - push ar2 - ldi 0x3f,ar2 - br SYM(_ISR_Handler_save_registers) - |