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Diffstat (limited to 'sim/ppc/interrupts.c')
| -rw-r--r-- | sim/ppc/interrupts.c | 541 |
1 files changed, 0 insertions, 541 deletions
diff --git a/sim/ppc/interrupts.c b/sim/ppc/interrupts.c deleted file mode 100644 index dafb2b3..0000000 --- a/sim/ppc/interrupts.c +++ /dev/null @@ -1,541 +0,0 @@ -/* This file is part of the program psim. - - Copyright 1994, 1995, 1996, 1997, 2003 Andrew Cagney - - 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 */ - - -STATIC_INLINE_INTERRUPTS\ -(msreg) -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; -} - - -STATIC_INLINE_INTERRUPTS\ -(msreg) -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; -} - - -STATIC_INLINE_INTERRUPTS\ -(unsigned_word) -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 */ - -STATIC_INLINE_INTERRUPTS\ -(unsigned_word) -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)) { - cpu_error(processor, cia, - "double interrupt - MSR[RI] bit clear when attempting to deliver interrupt, cia=0x%lx, msr=0x%lx; srr0=0x%lx(cia), srr1=0x%lx(msr); trap-vector=0x%lx, trap-msr=0x%lx", - (unsigned long)cia, - (unsigned long)old_msr, - (unsigned long)SRR0, - (unsigned long)SRR1, - (unsigned long)vector_offset, - (unsigned long)new_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, cia); - return nia; -} - - -INLINE_INTERRUPTS\ -(void) -machine_check_interrupt(cpu *processor, - unsigned_word cia) -{ - switch (CURRENT_ENVIRONMENT) { - - case USER_ENVIRONMENT: - case VIRTUAL_ENVIRONMENT: - cpu_error(processor, cia, "machine-check interrupt"); - - case OPERATING_ENVIRONMENT: - TRACE(trace_interrupts, ("machine-check interrupt - cia=0x%lx\n", - (unsigned long)cia)); - cia = perform_oea_interrupt(processor, cia, 0x00200, 0, 0, 0, 0); - cpu_restart(processor, cia); - - default: - error("internal error - machine_check_interrupt - bad switch"); - - } -} - - -INLINE_INTERRUPTS\ -(void) -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("internal error - data_storage_interrupt - should not be called in VEA mode"); - break; - - 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("internal error - data_storage_interrupt - reason %d not implemented", reason); - break; - } - DAR = (spreg)ea; - TRACE(trace_interrupts, ("data storage interrupt - cia=0x%lx DAR=0x%lx DSISR=0x%lx\n", - (unsigned long)cia, - (unsigned long)DAR, - (unsigned long)DSISR)); - cia = perform_oea_interrupt(processor, cia, 0x00300, 0, 0, 0, 0); - cpu_restart(processor, cia); - } - - default: - error("internal error - data_storage_interrupt - bad switch"); - - } -} - - -INLINE_INTERRUPTS\ -(void) -instruction_storage_interrupt(cpu *processor, - unsigned_word cia, - storage_interrupt_reasons reason) -{ - switch (CURRENT_ENVIRONMENT) { - - case USER_ENVIRONMENT: - case VIRTUAL_ENVIRONMENT: - error("internal error - instruction_storage_interrupt - should not be called in VEA mode"); - - 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("internal error - instruction_storage_interrupt - reason %d not implemented"); - break; - } - TRACE(trace_interrupts, ("instruction storage interrupt - cia=0x%lx SRR1|=0x%lx\n", - (unsigned long)cia, - (unsigned long)srr1_set)); - cia = perform_oea_interrupt(processor, cia, 0x00400, 0, 0, 0, srr1_set); - cpu_restart(processor, cia); - } - - default: - error("internal error - instruction_storage_interrupt - bad switch"); - - } -} - - - -INLINE_INTERRUPTS\ -(void) -alignment_interrupt(cpu *processor, - unsigned_word cia, - unsigned_word ra) -{ - switch (CURRENT_ENVIRONMENT) { - - case USER_ENVIRONMENT: - case VIRTUAL_ENVIRONMENT: - cpu_error(processor, cia, "alignment interrupt - ra=0x%lx", ra); - - case OPERATING_ENVIRONMENT: - DAR = (spreg)ra; - DSISR = 0; /* FIXME */ - TRACE(trace_interrupts, ("alignment interrupt - cia=0x%lx DAR=0x%lx DSISR=0x%lx\n", - (unsigned long)cia, - (unsigned long)DAR, - (unsigned long)DSISR)); - cia = perform_oea_interrupt(processor, cia, 0x00600, 0, 0, 0, 0); - cpu_restart(processor, cia); - - default: - error("internal error - alignment_interrupt - bad switch"); - - } -} - - - - -INLINE_INTERRUPTS\ -(void) -program_interrupt(cpu *processor, - unsigned_word cia, - program_interrupt_reasons reason) -{ - switch (CURRENT_ENVIRONMENT) { - - case USER_ENVIRONMENT: - case VIRTUAL_ENVIRONMENT: - switch (reason) { - case floating_point_enabled_program_interrupt: - cpu_error(processor, cia, "program interrupt - %s", - "floating point enabled"); - break; - case illegal_instruction_program_interrupt: - cpu_error(processor, cia, "program interrupt - %s", - "illegal instruction"); - break; - case privileged_instruction_program_interrupt: - cpu_error(processor, cia, "program interrupt - %s", - "privileged instruction"); - break; - case trap_program_interrupt: - cpu_error(processor, cia, "program interrupt - %s", - "trap"); - break; - case optional_instruction_program_interrupt: - cpu_error(processor, cia, "program interrupt - %s", - "illegal instruction (optional instruction not supported)"); - break; - case mpc860c0_instruction_program_interrupt: - cpu_error(processor, cia, "program interrupt - %s", - "problematic branch detected, see MPC860 C0 errata"); - break; - default: - error("internal error - program_interrupt - reason %d not implemented", reason); - } - - case OPERATING_ENVIRONMENT: - { - msreg srr1_set; - switch (reason) { - case floating_point_enabled_program_interrupt: - srr1_set = srr1_floating_point_enabled; - break; - case optional_instruction_program_interrupt: - 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; - case mpc860c0_instruction_program_interrupt: - srr1_set = 0; - cpu_error(processor, cia, "program interrupt - %s", - "problematic branch detected, see MPC860 C0 errata"); - break; - default: - srr1_set = 0; - error("internal error - program_interrupt - reason %d not implemented", reason); - break; - } - TRACE(trace_interrupts, ("program interrupt - cia=0x%lx SRR1|=0x%lx\n", - (unsigned long)cia, - (unsigned long)srr1_set)); - cia = perform_oea_interrupt(processor, cia, 0x00700, 0, 0, 0, srr1_set); - cpu_restart(processor, cia); - } - - default: - error("internal error - program_interrupt - bad switch"); - - } -} - - -INLINE_INTERRUPTS\ -(void) -floating_point_unavailable_interrupt(cpu *processor, - unsigned_word cia) -{ - switch (CURRENT_ENVIRONMENT) { - - case USER_ENVIRONMENT: - case VIRTUAL_ENVIRONMENT: - cpu_error(processor, cia, "floating-point unavailable interrupt"); - - case OPERATING_ENVIRONMENT: - TRACE(trace_interrupts, ("floating-point unavailable interrupt - cia=0x%lx\n", - (unsigned long)cia)); - cia = perform_oea_interrupt(processor, cia, 0x00800, 0, 0, 0, 0); - cpu_restart(processor, cia); - - default: - error("internal error - floating_point_unavailable_interrupt - bad switch"); - - } -} - - -INLINE_INTERRUPTS\ -(void) -system_call_interrupt(cpu *processor, - unsigned_word cia) -{ - TRACE(trace_interrupts, ("system-call interrupt - cia=0x%lx\n", (unsigned long)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("internal error - system_call_interrupt - bad switch"); - - } -} - -INLINE_INTERRUPTS\ -(void) -floating_point_assist_interrupt(cpu *processor, - unsigned_word cia) -{ - switch (CURRENT_ENVIRONMENT) { - - case USER_ENVIRONMENT: - case VIRTUAL_ENVIRONMENT: - cpu_error(processor, cia, "floating-point assist interrupt"); - - case OPERATING_ENVIRONMENT: - TRACE(trace_interrupts, ("floating-point assist interrupt - cia=0x%lx\n", (unsigned long)cia)); - cia = perform_oea_interrupt(processor, cia, 0x00e00, 0, 0, 0, 0); - cpu_restart(processor, cia); - - default: - error("internal error - floating_point_assist_interrupt - bad switch"); - - } -} - - - -/* handle an externally generated event or an interrupt that has just - been enabled through changes to the MSR. */ - -STATIC_INLINE_INTERRUPTS\ -(void) -deliver_hardware_interrupt(void *data) -{ - cpu *processor = (cpu*)data; - interrupts *ints = cpu_interrupts(processor); - ints->delivery_scheduled = NULL; - if ((cpu_registers(processor)->msr & (msr_floating_point_exception_mode_0 - | msr_floating_point_exception_mode_1)) - && cpu_registers(processor)->fpscr & fpscr_fex) { - msreg srr1_set = srr1_floating_point_enabled | srr1_subsequent_instruction; - unsigned_word cia = cpu_get_program_counter(processor); - unsigned_word nia = perform_oea_interrupt(processor, - cia, 0x00700, 0, 0, 0, srr1_set); - cpu_set_program_counter(processor, nia); - } - else if (cpu_registers(processor)->msr & msr_external_interrupt_enable) { - /* external interrupts have a high priority and remain pending */ - if (ints->pending_interrupts & external_interrupt_pending) { - unsigned_word cia = cpu_get_program_counter(processor); - unsigned_word nia = perform_oea_interrupt(processor, - cia, 0x00500, 0, 0, 0, 0); - TRACE(trace_interrupts, ("external interrupt - cia=0x%lx\n", (unsigned long)cia)); - cpu_set_program_counter(processor, nia); - } - /* decrementer interrupts have a lower priority and are once only */ - else if (ints->pending_interrupts & decrementer_interrupt_pending) { - unsigned_word cia = cpu_get_program_counter(processor); - unsigned_word nia = perform_oea_interrupt(processor, - cia, 0x00900, 0, 0, 0, 0); - TRACE(trace_interrupts, ("decrementer interrupt - cia 0x%lx, time %ld\n", - (unsigned long)cia, - (unsigned long)event_queue_time(psim_event_queue(cpu_system(processor))) - )); - cpu_set_program_counter(processor, nia); - ints->pending_interrupts &= ~decrementer_interrupt_pending; - } - } -} - -STATIC_INLINE_INTERRUPTS\ -(void) -schedule_hardware_interrupt_delivery(cpu *processor) -{ - interrupts *ints = cpu_interrupts(processor); - if (ints->delivery_scheduled == NULL) { - ints->delivery_scheduled = - event_queue_schedule(psim_event_queue(cpu_system(processor)), - 0, deliver_hardware_interrupt, processor); - } -} - - -INLINE_INTERRUPTS\ -(void) -check_masked_interrupts(cpu *processor) -{ - if (((cpu_registers(processor)->msr & (msr_floating_point_exception_mode_0 - | msr_floating_point_exception_mode_1)) - && cpu_registers(processor)->fpscr & fpscr_fex) - || ((cpu_registers(processor)->msr & msr_external_interrupt_enable) - && (cpu_interrupts(processor)->pending_interrupts))) - schedule_hardware_interrupt_delivery(processor); -} - -INLINE_INTERRUPTS\ -(void) -decrementer_interrupt(cpu *processor) -{ - interrupts *ints = cpu_interrupts(processor); - ints->pending_interrupts |= decrementer_interrupt_pending; - if (cpu_registers(processor)->msr & msr_external_interrupt_enable) { - schedule_hardware_interrupt_delivery(processor); - } -} - -INLINE_INTERRUPTS\ -(void) -external_interrupt(cpu *processor, - int is_asserted) -{ - interrupts *ints = cpu_interrupts(processor); - if (is_asserted) { - if (!(ints->pending_interrupts & external_interrupt_pending)) { - ints->pending_interrupts |= external_interrupt_pending; - if (cpu_registers(processor)->msr & msr_external_interrupt_enable) - schedule_hardware_interrupt_delivery(processor); - } - else { - /* check that we haven't missed out on a chance to deliver an - interrupt */ - ASSERT(!(cpu_registers(processor)->msr & msr_external_interrupt_enable)); - } - } - else { - ints->pending_interrupts &= ~external_interrupt_pending; - } -} - -#endif /* _INTERRUPTS_C_ */ |