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-rw-r--r--sim/ppc/interrupts.c408
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diff --git a/sim/ppc/interrupts.c b/sim/ppc/interrupts.c
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--- a/sim/ppc/interrupts.c
+++ /dev/null
@@ -1,408 +0,0 @@
-/* This file is part of the program psim.
-
- Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- */
-
-
-#ifndef _INTERRUPTS_C_
-#define _INTERRUPTS_C_
-
-#include <signal.h>
-
-#include "cpu.h"
-#include "idecode.h"
-#include "os_emul.h"
-
-
-/* Operating environment support code
-
- Unlike the VEA, the OEA must fully model the effect an interrupt
- has on the processors state.
-
- Each function below return updated values for registers effected by
- interrupts */
-
-
-msreg STATIC_INLINE_INTERRUPTS
-interrupt_msr(msreg old_msr,
- msreg msr_clear,
- msreg msr_set)
-{
- msreg msr_set_to_0 = (msr_branch_trace_enable
- | msr_data_relocate
- | msr_external_interrupt_enable
- | msr_floating_point_exception_mode_0
- | msr_floating_point_exception_mode_1
- | msr_floating_point_available
- | msr_instruction_relocate
- | msr_power_management_enable
- | msr_problem_state
- | msr_recoverable_interrupt
- | msr_single_step_trace_enable);
- /* remember, in 32bit mode msr_64bit_mode is zero */
- msreg new_msr = ((((old_msr & ~msr_set_to_0)
- | msr_64bit_mode)
- & ~msr_clear)
- | msr_set);
- return new_msr;
-}
-
-
-msreg STATIC_INLINE_INTERRUPTS
-interrupt_srr1(msreg old_msr,
- msreg srr1_clear,
- msreg srr1_set)
-{
- spreg srr1_mask = (MASK(0,32)
- | MASK(37, 41)
- | MASK(48, 63));
- spreg srr1 = (old_msr & srr1_mask & ~srr1_clear) | srr1_set;
- return srr1;
-}
-
-
-unsigned_word STATIC_INLINE_INTERRUPTS
-interrupt_base_ea(msreg msr)
-{
- if (msr & msr_interrupt_prefix)
- return MASK(0, 43);
- else
- return 0;
-}
-
-
-/* finish off an interrupt for the OEA model, updating all registers
- and forcing a restart of the processor */
-
-unsigned_word STATIC_INLINE_INTERRUPTS
-perform_oea_interrupt(cpu *processor,
- unsigned_word cia,
- unsigned_word vector_offset,
- msreg msr_clear,
- msreg msr_set,
- msreg srr1_clear,
- msreg srr1_set)
-{
- msreg old_msr = MSR;
- msreg new_msr = interrupt_msr(old_msr, msr_clear, msr_set);
- unsigned_word nia;
- if (!(old_msr & msr_recoverable_interrupt))
- error("perform_oea_interrupt() recoverable_interrupt bit clear, cia=0x%x, msr=0x%x\n",
- cia, old_msr);
- SRR0 = (spreg)(cia);
- SRR1 = interrupt_srr1(old_msr, srr1_clear, srr1_set);
- MSR = new_msr;
- nia = interrupt_base_ea(new_msr) + vector_offset;
- cpu_synchronize_context(processor);
- return nia;
-}
-
-
-void INLINE_INTERRUPTS
-machine_check_interrupt(cpu *processor,
- unsigned_word cia)
-{
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- error("%s - cia=0x%x\n",
- "machine_check_interrupt", cia);
-
- case OPERATING_ENVIRONMENT:
- cia = perform_oea_interrupt(processor, cia, 0x00200, 0, 0, 0, 0);
- cpu_restart(processor, cia);
-
- default:
- error("machine_check_interrupt() - internal error\n");
-
- }
-}
-
-
-void INLINE_INTERRUPTS
-data_storage_interrupt(cpu *processor,
- unsigned_word cia,
- unsigned_word ea,
- storage_interrupt_reasons reason,
- int is_store)
-{
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- error("data_storage_interrupt() should not be called in VEA mode\n");
-
- case OPERATING_ENVIRONMENT:
- {
- spreg direction = (is_store ? dsisr_store_operation : 0);
- switch (reason) {
- case direct_store_storage_interrupt:
- DSISR = dsisr_direct_store_error_exception | direction;
- break;
- case hash_table_miss_storage_interrupt:
- DSISR = dsisr_hash_table_or_dbat_miss | direction;
- break;
- case protection_violation_storage_interrupt:
- DSISR = dsisr_protection_violation | direction;
- break;
- case earwax_violation_storage_interrupt:
- DSISR = dsisr_earwax_violation | direction;
- break;
- case segment_table_miss_storage_interrupt:
- DSISR = dsisr_segment_table_miss | direction;
- break;
- case earwax_disabled_storage_interrupt:
- DSISR = dsisr_earwax_disabled | direction;
- break;
- default:
- error("data_storage_interrupt: unknown reason %d\n", reason);
- break;
- }
- DAR = (spreg)ea;
- cia = perform_oea_interrupt(processor, cia, 0x00300, 0, 0, 0, 0);
- cpu_restart(processor, cia);
- }
-
- default:
- error("data_storage_interrupt() - internal error\n");
-
- }
-}
-
-
-void INLINE_INTERRUPTS
-instruction_storage_interrupt(cpu *processor,
- unsigned_word cia,
- storage_interrupt_reasons reason)
-{
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- error("instruction_storage_interrupt - cia=0x%x - not implemented\n",
- cia);
-
- case OPERATING_ENVIRONMENT:
- {
- msreg srr1_set;
- switch(reason) {
- case hash_table_miss_storage_interrupt:
- srr1_set = srr1_hash_table_or_ibat_miss;
- break;
- case direct_store_storage_interrupt:
- srr1_set = srr1_direct_store_error_exception;
- break;
- case protection_violation_storage_interrupt:
- srr1_set = srr1_protection_violation;
- break;
- case segment_table_miss_storage_interrupt:
- srr1_set = srr1_segment_table_miss;
- break;
- default:
- srr1_set = 0;
- error("instruction_storage_interrupt: unknown reason %d\n", reason);
- break;
- }
- cia = perform_oea_interrupt(processor, cia, 0x00400, 0, 0, 0, srr1_set);
- cpu_restart(processor, cia);
- }
-
- default:
- error("instruction_storage_interrupt() - internal error\n");
-
- }
-}
-
-
-
-void INLINE_INTERRUPTS
-alignment_interrupt(cpu *processor,
- unsigned_word cia,
- unsigned_word ra)
-{
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- error("%s - cia=0x%x, ra=0x%x\n",
- "alignment_interrupt", cia, ra);
-
- case OPERATING_ENVIRONMENT:
- DAR = (spreg)ra;
- DSISR = 0; /* FIXME */
- cia = perform_oea_interrupt(processor, cia, 0x00600, 0, 0, 0, 0);
- cpu_restart(processor, cia);
-
- default:
- error("alignment_interrupt() - internal error\n");
-
- }
-}
-
-
-
-
-void INLINE_INTERRUPTS
-program_interrupt(cpu *processor,
- unsigned_word cia,
- program_interrupt_reasons reason)
-{
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- switch (reason) {
- default:
- error("%s - cia=0x%x, reason=%d - not implemented\n",
- "program_interrupt", cia, reason);
- }
-
- case OPERATING_ENVIRONMENT:
- {
- msreg srr1_set;
- switch (reason) {
- case illegal_instruction_program_interrupt:
- srr1_set = srr1_illegal_instruction;
- break;
- case privileged_instruction_program_interrupt:
- srr1_set = srr1_priviliged_instruction;
- break;
- case trap_program_interrupt:
- srr1_set = srr1_trap;
- break;
- default:
- srr1_set = 0;
- error("program_interrupt - cia=0x%x, reason=%d(%s) - not implemented\n",
- cia, reason);
- }
- cia = perform_oea_interrupt(processor, cia, 0x00700, 0, 0, 0, srr1_set);
- cpu_restart(processor, cia);
- }
-
- default:
- error("program_interrupt() - internal error\n");
-
- }
-}
-
-
-void INLINE_INTERRUPTS
-floating_point_unavailable_interrupt(cpu *processor,
- unsigned_word cia)
-{
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- error("%s - cia=0x%x - not implemented\n",
- "floating_point_unavailable_interrupt", cia);
-
- case OPERATING_ENVIRONMENT:
- cia = perform_oea_interrupt(processor, cia, 0x00800, 0, 0, 0, 0);
- cpu_restart(processor, cia);
-
- default:
- error("floating_point_unavailable_interrupt() - internal error\n");
-
- }
-}
-
-
-void INLINE_INTERRUPTS
-system_call_interrupt(cpu *processor,
- unsigned_word cia)
-{
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- os_emul_system_call(processor, cia);
- cpu_restart(processor, cia+4);
-
- case OPERATING_ENVIRONMENT:
- cia = perform_oea_interrupt(processor, cia+4, 0x00c00, 0, 0, 0, 0);
- cpu_restart(processor, cia);
-
- default:
- error("system_call_interrupt() - internal error\n");
-
- }
-}
-
-void INLINE_INTERRUPTS
-trace_interrupt(cpu *processor,
- unsigned_word cia);
-
-void INLINE_INTERRUPTS
-floating_point_assist_interrupt(cpu *processor,
- unsigned_word cia)
-{
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- error("%s - cia=0x%x - not implemented\n",
- "floating_point_assist_interrupt", cia);
-
- case OPERATING_ENVIRONMENT:
- cia = perform_oea_interrupt(processor, cia, 0x00e00, 0, 0, 0, 0);
- cpu_restart(processor, cia);
-
- default:
- error("floating_point_assist_interrupt() - internal error\n");
-
- }
-}
-
-
-
-/* handle an externally generated event */
-
-int INLINE_INTERRUPTS
-decrementer_interrupt(cpu *processor)
-{
- if (cpu_registers(processor)->msr & msr_external_interrupt_enable) {
- unsigned_word cia = cpu_get_program_counter(processor);
- unsigned_word nia = perform_oea_interrupt(processor,
- cia, 0x00900, 0, 0, 0, 0);
- cpu_set_program_counter(processor, nia);
- return 1;
- }
- else {
- return 0;
- }
-}
-
-int INLINE_INTERRUPTS
-external_interrupt(cpu *processor)
-{
- if (cpu_registers(processor)->msr & msr_external_interrupt_enable) {
- unsigned_word cia = cpu_get_program_counter(processor);
- unsigned_word nia = perform_oea_interrupt(processor,
- cia, 0x00500, 0, 0, 0, 0);
- cpu_set_program_counter(processor, nia);
- return 1;
- }
- else {
- return 0; /* not delivered */
- }
-}
-
-
-#endif /* _INTERRUPTS_C_ */