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Diffstat (limited to 'sim/mips/dv-tx3904sio.c')
| -rw-r--r-- | sim/mips/dv-tx3904sio.c | 622 |
1 files changed, 0 insertions, 622 deletions
diff --git a/sim/mips/dv-tx3904sio.c b/sim/mips/dv-tx3904sio.c deleted file mode 100644 index 5ba8e37a82e..00000000000 --- a/sim/mips/dv-tx3904sio.c +++ /dev/null @@ -1,622 +0,0 @@ -/* This file is part of the program GDB, the GNU debugger. - - Copyright (C) 1998, 1999 Free Software Foundation, Inc. - Contributed by Cygnus Solutions. - - 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. - - */ - - -#include "sim-main.h" -#include "hw-main.h" -#include "dv-sockser.h" -#include "sim-assert.h" - - -/* DEVICE - - - tx3904sio - tx3904 serial I/O - - - DESCRIPTION - - - Implements one tx3904 serial I/O controller described in the tx3904 - user guide. Three instances are required for SIO0 and SIO1 within - the tx3904, at different base addresses. - - Both internal and system clocks are synthesized as divided versions - of the simulator clock. - - There is no support for: - - CTS/RTS flow control - - baud rate emulation - use infinite speed instead - - general frame format - use 8N1 - - multi-controller system - - DMA - use interrupt-driven or polled-I/O instead - - - PROPERTIES - - - reg <base> <length> - - Base of SIO control register bank. <length> must equal 0x100. - Register offsets: 0: SLCR: line control register - 4: SLSR: line status register - 8: SDICR: DMA/interrupt control register - 12: SDISR: DMA/interrupt status register - 16: SFCR: FIFO control register - 20: SBGR: baud rate control register - 32: transfer FIFO buffer - 48: transfer FIFO buffer - - backend {tcp | stdio} - - Use dv-sockser TCP-port backend or stdio for backend. Default: stdio. - - - - PORTS - - - int (output) - - Interrupt port. An event is generated when a timer interrupt - occurs. - - - reset (input) - - Reset port. - - */ - - - -/* static functions */ - -struct tx3904sio_fifo; - -static void tx3904sio_tickle(struct hw*); -static int tx3904sio_fifo_nonempty(struct hw*, struct tx3904sio_fifo*); -static char tx3904sio_fifo_pop(struct hw*, struct tx3904sio_fifo*); -static void tx3904sio_fifo_push(struct hw*, struct tx3904sio_fifo*, char); -static void tx3904sio_fifo_reset(struct hw*, struct tx3904sio_fifo*); -static void tx3904sio_poll(struct hw*, void* data); - - -/* register numbers; each is one word long */ -enum -{ - SLCR_REG = 0, - SLSR_REG = 1, - SDICR_REG = 2, - SDISR_REG = 3, - SFCR_REG = 4, - SBGR_REG = 5, - TFIFO_REG = 8, - SFIFO_REG = 12, -}; - - - -/* port ID's */ - -enum - { - RESET_PORT, - INT_PORT, -}; - - -static const struct hw_port_descriptor tx3904sio_ports[] = -{ - { "int", INT_PORT, 0, output_port, }, - { "reset", RESET_PORT, 0, input_port, }, - { NULL, }, -}; - - - -/* Generic FIFO */ -struct tx3904sio_fifo -{ - int size, used; - unsigned_1 *buffer; -}; - - - -/* The timer/counter register internal state. Note that we store - state using the control register images, in host endian order. */ - -struct tx3904sio -{ - address_word base_address; /* control register base */ - enum {sio_tcp, sio_stdio} backend; /* backend */ - - struct tx3904sio_fifo rx_fifo, tx_fifo; /* FIFOs */ - - unsigned_4 slcr; -#define SLCR_WR_MASK 0xe17f0000U -#define SLCR_SET_BYTE(c,o,b) ((c)->slcr = SLCR_WR_MASK & (((c)->slcr & ~LSMASK32((o)*8+7,(o)*8)) | ((b)<< (o)*8))) - unsigned_4 slsr; -#define SLSR_WR_MASK 0x00000000 /* UFER/UPER/UOER unimplemented */ - unsigned_4 sdicr; -#define SDICR_WR_MASK 0x000f0000U -#define SDICR_SET_BYTE(c,o,b) ((c)->sdicr = SDICR_WR_MASK & (((c)->sdicr & ~LSMASK32((o)*8+7,(o)*8)) | ((b)<< (o)*8))) -#define SDICR_GET_SDMAE(c) ((c)->sdicr & 0x00080000) -#define SDICR_GET_ERIE(c) ((c)->sdicr & 0x00040000) -#define SDICR_GET_TDIE(c) ((c)->sdicr & 0x00020000) -#define SDICR_GET_RDIE(c) ((c)->sdicr & 0x00010000) - unsigned_4 sdisr; -#define SDISR_WR_MASK 0x00070000U -#define SDISR_SET_BYTE(c,o,b) ((c)->sdisr = SDISR_WR_MASK & (((c)->sdisr & ~LSMASK32((o)*8+7,(o)*8)) | ((b)<< (o)*8))) -#define SDISR_CLEAR_FLAG_BYTE(c,o,b) ((c)->sdisr = SDISR_WR_MASK & (((c)->sdisr & ~LSMASK32((o)*8+7,(o)*8)) & ((b)<< (o)*8))) -#define SDISR_GET_TDIS(c) ((c)->sdisr & 0x00020000) -#define SDISR_SET_TDIS(c) ((c)->sdisr |= 0x00020000) -#define SDISR_GET_RDIS(c) ((c)->sdisr & 0x00010000) -#define SDISR_SET_RDIS(c) ((c)->sdisr |= 0x00010000) - unsigned_4 sfcr; -#define SFCR_WR_MASK 0x001f0000U -#define SFCR_SET_BYTE(c,o,b) ((c)->sfcr = SFCR_WR_MASK & (((c)->sfcr & ~LSMASK32((o)*8+7,(o)*8)) | ((b)<< (o)*8))) -#define SFCR_GET_TFRST(c) ((c)->sfcr & 0x00040000) -#define SFCR_GET_RFRST(c) ((c)->sfcr & 0x00020000) -#define SFCR_GET_FRSTE(c) ((c)->sfcr & 0x00010000) - unsigned_4 sbgr; -#define SBGR_WR_MASK 0x03ff0000U -#define SBGR_SET_BYTE(c,o,b) ((c)->sbgr = SBGR_WR_MASK & (((c)->sbgr & ~LSMASK32((o)*8+7,(o)*8)) | ((b)<< (o)*8))) - - /* Periodic I/O polling */ - struct hw_event* poll_event; -}; - - - -/* Finish off the partially created hw device. Attach our local - callbacks. Wire up our port names etc */ - -static hw_io_read_buffer_method tx3904sio_io_read_buffer; -static hw_io_write_buffer_method tx3904sio_io_write_buffer; -static hw_port_event_method tx3904sio_port_event; - - -static void -attach_tx3904sio_regs (struct hw *me, - struct tx3904sio *controller) -{ - unsigned_word attach_address; - int attach_space; - unsigned attach_size; - reg_property_spec reg; - - if (hw_find_property (me, "reg") == NULL) - hw_abort (me, "Missing \"reg\" property"); - - if (!hw_find_reg_array_property (me, "reg", 0, ®)) - hw_abort (me, "\"reg\" property must contain one addr/size entry"); - - hw_unit_address_to_attach_address (hw_parent (me), - ®.address, - &attach_space, - &attach_address, - me); - hw_unit_size_to_attach_size (hw_parent (me), - ®.size, - &attach_size, me); - - hw_attach_address (hw_parent (me), 0, - attach_space, attach_address, attach_size, - me); - - if(hw_find_property(me, "backend") != NULL) - { - const char* value = hw_find_string_property(me, "backend"); - if(! strcmp(value, "tcp")) - controller->backend = sio_tcp; - else if(! strcmp(value, "stdio")) - controller->backend = sio_stdio; - else - hw_abort(me, "illegal value for backend parameter `%s': use tcp or stdio", value); - } - - controller->base_address = attach_address; -} - - -static void -tx3904sio_finish (struct hw *me) -{ - struct tx3904sio *controller; - - controller = HW_ZALLOC (me, struct tx3904sio); - set_hw_data (me, controller); - set_hw_io_read_buffer (me, tx3904sio_io_read_buffer); - set_hw_io_write_buffer (me, tx3904sio_io_write_buffer); - set_hw_ports (me, tx3904sio_ports); - set_hw_port_event (me, tx3904sio_port_event); - - /* Preset defaults */ - controller->backend = sio_stdio; - - /* Attach ourself to our parent bus */ - attach_tx3904sio_regs (me, controller); - - /* Initialize to reset state */ - tx3904sio_fifo_reset(me, & controller->rx_fifo); - tx3904sio_fifo_reset(me, & controller->tx_fifo); - controller->slsr = controller->sdicr - = controller->sdisr = controller->sfcr - = controller->sbgr = 0; - controller->slcr = 0x40000000; /* set TWUB */ - controller->sbgr = 0x03ff0000; /* set BCLK=3, BRD=FF */ - controller->poll_event = NULL; -} - - - -/* An event arrives on an interrupt port */ - -static void -tx3904sio_port_event (struct hw *me, - int my_port, - struct hw *source, - int source_port, - int level) -{ - struct tx3904sio *controller = hw_data (me); - - switch (my_port) - { - case RESET_PORT: - { - HW_TRACE ((me, "reset")); - - tx3904sio_fifo_reset(me, & controller->rx_fifo); - tx3904sio_fifo_reset(me, & controller->tx_fifo); - controller->slsr = controller->sdicr - = controller->sdisr = controller->sfcr - = controller->sbgr = 0; - controller->slcr = 0x40000000; /* set TWUB */ - controller->sbgr = 0x03ff0000; /* set BCLK=3, BRD=FF */ - /* Don't interfere with I/O poller. */ - break; - } - - default: - hw_abort (me, "Event on unknown port %d", my_port); - break; - } -} - - -/* generic read/write */ - -static unsigned -tx3904sio_io_read_buffer (struct hw *me, - void *dest, - int space, - unsigned_word base, - unsigned nr_bytes) -{ - struct tx3904sio *controller = hw_data (me); - unsigned byte; - - HW_TRACE ((me, "read 0x%08lx %d", (long) base, (int) nr_bytes)); - - /* tickle fifos */ - tx3904sio_tickle(me); - - for (byte = 0; byte < nr_bytes; byte++) - { - address_word address = base + byte; - int reg_number = (address - controller->base_address) / 4; - int reg_offset = (address - controller->base_address) % 4; - unsigned_4 register_value; /* in target byte order */ - - /* fill in entire register_value word */ - switch (reg_number) - { - case SLCR_REG: register_value = controller->slcr; break; - case SLSR_REG: register_value = controller->slsr; break; - case SDICR_REG: register_value = controller->sdicr; break; - case SDISR_REG: register_value = controller->sdisr; break; - case SFCR_REG: register_value = controller->sfcr; break; - case SBGR_REG: register_value = controller->sbgr; break; - case TFIFO_REG: register_value = 0; break; - case SFIFO_REG: - /* consume rx fifo for MS byte */ - if(reg_offset == 0 && tx3904sio_fifo_nonempty(me, & controller->rx_fifo)) - register_value = (tx3904sio_fifo_pop(me, & controller->rx_fifo) << 24); - else - register_value = 0; - break; - default: register_value = 0; - } - - /* write requested byte out */ - register_value = H2T_4(register_value); - /* HW_TRACE ((me, "byte %d %02x", reg_offset, ((char*)& register_value)[reg_offset])); */ - memcpy ((char*) dest + byte, ((char*)& register_value)+reg_offset, 1); - } - - return nr_bytes; -} - - - -static unsigned -tx3904sio_io_write_buffer (struct hw *me, - const void *source, - int space, - unsigned_word base, - unsigned nr_bytes) -{ - struct tx3904sio *controller = hw_data (me); - unsigned byte; - - HW_TRACE ((me, "write 0x%08lx %d", (long) base, (int) nr_bytes)); - for (byte = 0; byte < nr_bytes; byte++) - { - address_word address = base + byte; - unsigned_1 write_byte = ((const unsigned char*) source)[byte]; - int reg_number = (address - controller->base_address) / 4; - int reg_offset = 3 - (address - controller->base_address) % 4; - - /* HW_TRACE ((me, "byte %d %02x", reg_offset, write_byte)); */ - - /* fill in entire register_value word */ - switch (reg_number) - { - case SLCR_REG: - SLCR_SET_BYTE(controller, reg_offset, write_byte); - break; - - case SLSR_REG: /* unwriteable */ break; - - case SDICR_REG: - { - unsigned_4 last_int, next_int; - - /* deassert interrupt upon clear */ - last_int = controller->sdisr & controller->sdicr; - /* HW_TRACE ((me, "sdicr - sdisr %08x sdicr %08x", - controller->sdisr, controller->sdicr)); */ - SDICR_SET_BYTE(controller, reg_offset, write_byte); - /* HW_TRACE ((me, "sdicr + sdisr %08x sdicr %08x", - controller->sdisr, controller->sdicr)); */ - next_int = controller->sdisr & controller->sdicr; - - if(SDICR_GET_SDMAE(controller)) - hw_abort(me, "Cannot support DMA-driven sio."); - - if(~last_int & next_int) /* any bits set? */ - hw_port_event(me, INT_PORT, 1); - if(last_int & ~next_int) /* any bits cleared? */ - hw_port_event(me, INT_PORT, 0); - } - break; - - case SDISR_REG: - { - unsigned_4 last_int, next_int; - - /* deassert interrupt upon clear */ - last_int = controller->sdisr & controller->sdicr; - /* HW_TRACE ((me, "sdisr - sdisr %08x sdicr %08x", - controller->sdisr, controller->sdicr)); */ - SDISR_CLEAR_FLAG_BYTE(controller, reg_offset, write_byte); - /* HW_TRACE ((me, "sdisr + sdisr %08x sdicr %08x", - controller->sdisr, controller->sdicr)); */ - next_int = controller->sdisr & controller->sdicr; - - if(~last_int & next_int) /* any bits set? */ - hw_port_event(me, INT_PORT, 1); - if(last_int & ~next_int) /* any bits cleared? */ - hw_port_event(me, INT_PORT, 0); - } - break; - - case SFCR_REG: - SFCR_SET_BYTE(controller, reg_offset, write_byte); - if(SFCR_GET_FRSTE(controller)) - { - if(SFCR_GET_TFRST(controller)) tx3904sio_fifo_reset(me, & controller->tx_fifo); - if(SFCR_GET_RFRST(controller)) tx3904sio_fifo_reset(me, & controller->rx_fifo); - } - break; - - case SBGR_REG: - SBGR_SET_BYTE(controller, reg_offset, write_byte); - break; - - case SFIFO_REG: /* unwriteable */ break; - - case TFIFO_REG: - if(reg_offset == 3) /* first byte */ - tx3904sio_fifo_push(me, & controller->tx_fifo, write_byte); - break; - - default: - HW_TRACE ((me, "write to illegal register %d", reg_number)); - } - } /* loop over bytes */ - - /* tickle fifos */ - tx3904sio_tickle(me); - - return nr_bytes; -} - - - - - - -/* Send enqueued characters from tx_fifo and trigger TX interrupt. -Receive characters into rx_fifo and trigger RX interrupt. */ -void -tx3904sio_tickle(struct hw *me) -{ - struct tx3904sio* controller = hw_data(me); - int c; - char cc; - unsigned_4 last_int, next_int; - - /* HW_TRACE ((me, "tickle backend: %02x", controller->backend)); */ - switch(controller->backend) - { - case sio_tcp: - - while(tx3904sio_fifo_nonempty(me, & controller->tx_fifo)) - { - cc = tx3904sio_fifo_pop(me, & controller->tx_fifo); - dv_sockser_write(hw_system(me), cc); - HW_TRACE ((me, "tcp output: %02x", cc)); - } - - c = dv_sockser_read(hw_system(me)); - while(c != -1) - { - cc = (char) c; - HW_TRACE ((me, "tcp input: %02x", cc)); - tx3904sio_fifo_push(me, & controller->rx_fifo, cc); - c = dv_sockser_read(hw_system(me)); - } - break; - - case sio_stdio: - - while(tx3904sio_fifo_nonempty(me, & controller->tx_fifo)) - { - cc = tx3904sio_fifo_pop(me, & controller->tx_fifo); - sim_io_write_stdout(hw_system(me), & cc, 1); - sim_io_flush_stdout(hw_system(me)); - HW_TRACE ((me, "stdio output: %02x", cc)); - } - - c = sim_io_poll_read(hw_system(me), 0 /* stdin */, & cc, 1); - while(c == 1) - { - HW_TRACE ((me, "stdio input: %02x", cc)); - tx3904sio_fifo_push(me, & controller->rx_fifo, cc); - c = sim_io_poll_read(hw_system(me), 0 /* stdin */, & cc, 1); - } - - break; - - default: - hw_abort(me, "Illegal backend mode: %d", controller->backend); - } - - /* Update RDIS / TDIS flags */ - last_int = controller->sdisr & controller->sdicr; - /* HW_TRACE ((me, "tickle - sdisr %08x sdicr %08x", controller->sdisr, controller->sdicr)); */ - if(tx3904sio_fifo_nonempty(me, & controller->rx_fifo)) - SDISR_SET_RDIS(controller); - if(! tx3904sio_fifo_nonempty(me, & controller->tx_fifo)) - SDISR_SET_TDIS(controller); - next_int = controller->sdisr & controller->sdicr; - /* HW_TRACE ((me, "tickle + sdisr %08x sdicr %08x", controller->sdisr, controller->sdicr)); */ - - if(~last_int & next_int) /* any bits set? */ - hw_port_event(me, INT_PORT, 1); - if(last_int & ~next_int) /* any bits cleared? */ - hw_port_event(me, INT_PORT, 0); - - /* Add periodic polling for this port, if it's not already going. */ - if(controller->poll_event == NULL) - { - controller->poll_event = hw_event_queue_schedule (me, 1000, - tx3904sio_poll, NULL); - - } -} - - - - -int -tx3904sio_fifo_nonempty(struct hw* me, struct tx3904sio_fifo* fifo) -{ - /* HW_TRACE ((me, "fifo used: %d", fifo->used)); */ - return(fifo->used > 0); -} - - -char -tx3904sio_fifo_pop(struct hw* me, struct tx3904sio_fifo* fifo) -{ - char it; - ASSERT(fifo->used > 0); - ASSERT(fifo->buffer != NULL); - it = fifo->buffer[0]; - memcpy(& fifo->buffer[0], & fifo->buffer[1], fifo->used - 1); - fifo->used --; - /* HW_TRACE ((me, "pop fifo -> %02x", it)); */ - return it; -} - - -void -tx3904sio_fifo_push(struct hw* me, struct tx3904sio_fifo* fifo, char it) -{ - /* HW_TRACE ((me, "push %02x -> fifo", it)); */ - if(fifo->size == fifo->used) /* full */ - { - int next_size = fifo->size * 2 + 16; - char* next_buf = zalloc(next_size); - memcpy(next_buf, fifo->buffer, fifo->used); - - if(fifo->buffer != NULL) zfree(fifo->buffer); - fifo->buffer = next_buf; - fifo->size = next_size; - } - - fifo->buffer[fifo->used] = it; - fifo->used ++; -} - - -void -tx3904sio_fifo_reset(struct hw* me, struct tx3904sio_fifo* fifo) -{ - /* HW_TRACE ((me, "reset fifo")); */ - fifo->used = 0; - fifo->size = 0; - zfree(fifo->buffer); - fifo->buffer = 0; -} - - -void -tx3904sio_poll(struct hw* me, void* ignored) -{ - struct tx3904sio* controller = hw_data (me); - tx3904sio_tickle (me); - hw_event_queue_deschedule (me, controller->poll_event); - controller->poll_event = hw_event_queue_schedule (me, 1000, - tx3904sio_poll, NULL); -} - - - -const struct hw_descriptor dv_tx3904sio_descriptor[] = { - { "tx3904sio", tx3904sio_finish, }, - { NULL }, -}; |