From cc9bc93202f868d3e6bd38e96a292d775285d5d8 Mon Sep 17 00:00:00 2001 From: "Frank Ch. Eigler" Date: Tue, 9 Jun 1998 16:54:09 +0000 Subject: * Updates to tx3904 peripheral simulations for ECC. Tue Jun 9 12:29:50 1998 Frank Ch. Eigler * dv-tx3904cpu.c (deliver_*_interrupt,*_port_event): Set the CAUSE register upon non-zero interrupt event level, clear upon zero event value. * dv-tx3904irc.c (*_port_event): Handle deactivated interrupt signal by passing zero event value. (*_io_{read,write}_buffer): Endianness fixes. * dv-tx3904tmr.c (*_io_{read,write}_buffer): Endianness fixes. (deliver_*_tick): Reduce sim event interval to 75% of count interval. * interp.c (sim_open): Added jmr3904pal board type that adds PAL-based serial I/O and timer module at base address 0xFFFF0000. --- sim/mips/ChangeLog | 16 ++++++++++++++++ sim/mips/dv-tx3904cpu.c | 44 ++++++++++++++++++++++++++------------------ sim/mips/dv-tx3904tmr.c | 31 +++++++++++++++---------------- sim/mips/interp.c | 16 ++++++++++++++++ 4 files changed, 73 insertions(+), 34 deletions(-) (limited to 'sim/mips') diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog index ce00570..65280f3 100644 --- a/sim/mips/ChangeLog +++ b/sim/mips/ChangeLog @@ -1,3 +1,19 @@ +start-sanitize-tx3904 +Tue Jun 9 12:29:50 1998 Frank Ch. Eigler + + * dv-tx3904cpu.c (deliver_*_interrupt,*_port_event): Set the CAUSE + register upon non-zero interrupt event level, clear upon zero + event value. + * dv-tx3904irc.c (*_port_event): Handle deactivated interrupt signal + by passing zero event value. + (*_io_{read,write}_buffer): Endianness fixes. + * dv-tx3904tmr.c (*_io_{read,write}_buffer): Endianness fixes. + (deliver_*_tick): Reduce sim event interval to 75% of count interval. + + * interp.c (sim_open): Added jmr3904pal board type that adds PAL-based + serial I/O and timer module at base address 0xFFFF0000. + +end-sanitize-tx3904 Tue Jun 9 11:52:29 1998 Gavin Koch * mips.igen (SWC1) : Correct the handling of ReverseEndian diff --git a/sim/mips/dv-tx3904cpu.c b/sim/mips/dv-tx3904cpu.c index d043253..a040d4c 100644 --- a/sim/mips/dv-tx3904cpu.c +++ b/sim/mips/dv-tx3904cpu.c @@ -1,4 +1,4 @@ -/* This file is part of the program GDB, the GU debugger. +/* This file is part of the program GDB, the GNU debugger. Copyright (C) 1998 Free Software Foundation, Inc. Contributed by Cygnus Solutions. @@ -163,24 +163,28 @@ deliver_tx3904cpu_interrupt (struct hw *me, controller->pending_level, (long) CIA_GET (cpu), (long) SR)); - /* Don't overwrite the CAUSE field since we have no good place to clear - it again. The specs allow it to be zero by the time the interrupt - handler is invoked. */ - /* CAUSE &= ~ (cause_IP_mask << cause_IP_shift); - CAUSE |= (controller->pending_level & cause_IP_mask) << cause_IP_shift; */ + /* Clear CAUSE register. It may stay this way if the interrupt + was cleared with a negative pending_level. */ + CAUSE &= ~ (cause_IP_mask << cause_IP_shift); - /* check for enabled / unmasked interrupts */ - if((SR & status_IEc) && - (controller->pending_level & ((SR >> status_IM_shift) & status_IM_mask))) + if(controller->pending_level > 0) /* interrupt set */ { - controller->pending_level = 0; - SignalExceptionInterrupt(); - } - else - { - /* reschedule soon */ - hw_event_queue_schedule (me, 1, deliver_tx3904cpu_interrupt, NULL); - } + /* set hardware-interrupt subfields of CAUSE register */ + CAUSE |= (controller->pending_level & cause_IP_mask) << cause_IP_shift; + + /* check for enabled / unmasked interrupts */ + if((SR & status_IEc) && + (controller->pending_level & ((SR >> status_IM_shift) & status_IM_mask))) + { + controller->pending_level = 0; + SignalExceptionInterrupt(); + } + else + { + /* reschedule soon */ + hw_event_queue_schedule (me, 1, deliver_tx3904cpu_interrupt, NULL); + } + } /* interrupt set */ } #undef CPU cpu #undef SD current_state @@ -209,7 +213,11 @@ tx3904cpu_port_event (struct hw *me, break; case LEVEL_PORT: - controller->pending_level |= level; /* accumulate bits until they are cleared */ + /* level == 0 means that the interrupt was cleared */ + if(level == 0) + controller->pending_level = -1; /* signal end of interrupt */ + else + controller->pending_level = level; HW_TRACE ((me, "port-in level=%d", level)); break; diff --git a/sim/mips/dv-tx3904tmr.c b/sim/mips/dv-tx3904tmr.c index b101421..b27e9b0 100644 --- a/sim/mips/dv-tx3904tmr.c +++ b/sim/mips/dv-tx3904tmr.c @@ -324,7 +324,7 @@ tx3904tmr_io_read_buffer (struct hw *me, { address_word address = base + byte; int reg_number = (address - controller->base_address) / 4; - int reg_offset = (address - controller->base_address) % 4; + int reg_offset = 3 - (address - controller->base_address) % 4; unsigned_4 register_value; /* in target byte order */ /* fill in entire register_value word */ @@ -367,7 +367,7 @@ tx3904tmr_io_write_buffer (struct hw *me, address_word address = base + byte; unsigned_1 write_byte = ((char*) source)[byte]; int reg_number = (address - controller->base_address) / 4; - int reg_offset = (address - controller->base_address) % 4; + int reg_offset = 3 - (address - controller->base_address) % 4; unsigned_4* register_ptr; unsigned_4 register_value; @@ -384,9 +384,8 @@ tx3904tmr_io_write_buffer (struct hw *me, if(GET_TCR_TCE(controller) == 0 && GET_TCR_CRE(controller) == 1) controller->trr = 0; - } - HW_TRACE ((me, "tcr: %08lx", (long) controller->tcr)); + /* HW_TRACE ((me, "tcr: %08lx", (long) controller->tcr)); */ break; case ITMR_REG: @@ -398,7 +397,7 @@ tx3904tmr_io_write_buffer (struct hw *me, { SET_ITMR_TZCE(controller, write_byte & 0x01); } - HW_TRACE ((me, "itmr: %08lx", (long) controller->itmr)); + /* HW_TRACE ((me, "itmr: %08lx", (long) controller->itmr)); */ break; case CCDR_REG: @@ -406,7 +405,7 @@ tx3904tmr_io_write_buffer (struct hw *me, { controller->ccdr = write_byte & 0x07; } - HW_TRACE ((me, "ccdr: %08lx", (long) controller->ccdr)); + /* HW_TRACE ((me, "ccdr: %08lx", (long) controller->ccdr)); */ break; case PMGR_REG: @@ -419,7 +418,7 @@ tx3904tmr_io_write_buffer (struct hw *me, { SET_PMGR_FFI(controller, write_byte & 0x01); } - HW_TRACE ((me, "pmgr: %08lx", (long) controller->pmgr)); + /* HW_TRACE ((me, "pmgr: %08lx", (long) controller->pmgr)); */ break; case WTMR_REG: @@ -432,7 +431,7 @@ tx3904tmr_io_write_buffer (struct hw *me, SET_WTMR_WDIS(controller, write_byte & 0x80); SET_WTMR_TWC(controller, write_byte & 0x01); } - HW_TRACE ((me, "wtmr: %08lx", (long) controller->wtmr)); + /* HW_TRACE ((me, "wtmr: %08lx", (long) controller->wtmr)); */ break; case TISR_REG: @@ -450,23 +449,23 @@ tx3904tmr_io_write_buffer (struct hw *me, /* clear interrupt status register */ controller->tisr = 0; } - HW_TRACE ((me, "tisr: %08lx", (long) controller->tisr)); + /* HW_TRACE ((me, "tisr: %08lx", (long) controller->tisr)); */ break; case CPRA_REG: if(reg_offset < 3) /* first, second, or third byte */ { - MBLIT32(controller->cpra, (reg_offset*8), (reg_offset*8+7), write_byte); + MBLIT32(controller->cpra, (reg_offset*8)+7, (reg_offset*8), write_byte); } - HW_TRACE ((me, "cpra: %08lx", (long) controller->cpra)); + /* HW_TRACE ((me, "cpra: %08lx", (long) controller->cpra)); */ break; case CPRB_REG: if(reg_offset < 3) /* first, second, or third byte */ { - MBLIT32(controller->cprb, (reg_offset*8), (reg_offset*8+7), write_byte); + MBLIT32(controller->cprb, (reg_offset*8)+7, (reg_offset*8), write_byte); } - HW_TRACE ((me, "cprb: %08lx", (long) controller->cprb)); + /* HW_TRACE ((me, "cprb: %08lx", (long) controller->cprb)); */ break; default: @@ -667,9 +666,9 @@ deliver_tx3904tmr_tick (struct hw *me, } /* end quotient loop */ /* Reschedule a timer event in near future, so we can increment the - counter again. Set the event about 50% of divisor time away, so - we will experience roughly two events per counter increment. */ - hw_event_queue_schedule(me, divisor/2, deliver_tx3904tmr_tick, NULL); + counter again. Set the event about 75% of divisor time away, so + we will experience roughly 1.3 events per counter increment. */ + hw_event_queue_schedule(me, divisor*3/4, deliver_tx3904tmr_tick, NULL); } diff --git a/sim/mips/interp.c b/sim/mips/interp.c index f35674a..104e0d8 100644 --- a/sim/mips/interp.c +++ b/sim/mips/interp.c @@ -363,6 +363,8 @@ static const OPTION mips_options[] = /* start-sanitize-tx3904 */ #define BOARD_JMR3904 "jmr3904" "|" BOARD_JMR3904 +#define BOARD_JMR3904_PAL "jmr3904pal" + "|" BOARD_JMR3904_PAL #define BOARD_JMR3904_DEBUG "jmr3904debug" "|" BOARD_JMR3904_DEBUG /* end-sanitize-tx3904 */ @@ -481,6 +483,7 @@ sim_open (kind, cb, abfd, argv) #if (WITH_HW) if (board != NULL && (strcmp(board, BOARD_JMR3904) == 0 || + strcmp(board, BOARD_JMR3904_PAL) == 0 || strcmp(board, BOARD_JMR3904_DEBUG) == 0)) { /* match VIRTUAL memory layout of JMR-TX3904 board */ @@ -518,6 +521,19 @@ sim_open (kind, cb, abfd, argv) sim_hw_parse (sd, "/tx3904tmr@0xfffff100 > int tmr1 /tx3904irc"); sim_hw_parse (sd, "/tx3904tmr@0xfffff200 > int tmr2 /tx3904irc"); + /* add PAL timer & I/O module */ + if(! strcmp(board, BOARD_JMR3904_PAL)) + { + /* the device */ + sim_hw_parse (sd, "/pal@0xffff0000"); + sim_hw_parse (sd, "/pal@0xffff0000/reg 0xffff0000 64"); + + /* wire up interrupt ports to irc */ + sim_hw_parse (sd, "/pal@0x31000000 > countdown tmr0 /tx3904irc"); + sim_hw_parse (sd, "/pal@0x31000000 > timer tmr1 /tx3904irc"); + sim_hw_parse (sd, "/pal@0x31000000 > int int0 /tx3904irc"); + } + if(! strcmp(board, BOARD_JMR3904_DEBUG)) { /* -- DEBUG: glue interrupt generators --- */ -- cgit v1.1