| /* Blackfin General Purpose Timers (GPtimer) model |
| |
| Copyright (C) 2010-2021 Free Software Foundation, Inc. |
| Contributed by Analog Devices, Inc. |
| |
| This file is part of simulators. |
| |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| /* This must come before any other includes. */ |
| #include "defs.h" |
| |
| #include "sim-main.h" |
| #include "devices.h" |
| #include "dv-bfin_gptimer.h" |
| |
| /* XXX: This is merely a stub. */ |
| |
| struct bfin_gptimer |
| { |
| /* This top portion matches common dv_bfin struct. */ |
| bu32 base; |
| struct hw *dma_master; |
| bool acked; |
| |
| struct hw_event *handler; |
| char saved_byte; |
| int saved_count; |
| |
| /* Order after here is important -- matches hardware MMR layout. */ |
| bu16 BFIN_MMR_16(config); |
| bu32 counter, period, width; |
| }; |
| #define mmr_base() offsetof(struct bfin_gptimer, config) |
| #define mmr_offset(mmr) (offsetof(struct bfin_gptimer, mmr) - mmr_base()) |
| |
| static const char * const mmr_names[] = |
| { |
| "TIMER_CONFIG", "TIMER_COUNTER", "TIMER_PERIOD", "TIMER_WIDTH", |
| }; |
| #define mmr_name(off) mmr_names[(off) / 4] |
| |
| static unsigned |
| bfin_gptimer_io_write_buffer (struct hw *me, const void *source, int space, |
| address_word addr, unsigned nr_bytes) |
| { |
| struct bfin_gptimer *gptimer = hw_data (me); |
| bu32 mmr_off; |
| bu32 value; |
| bu16 *value16p; |
| bu32 *value32p; |
| void *valuep; |
| |
| /* Invalid access mode is higher priority than missing register. */ |
| if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, true)) |
| return 0; |
| |
| if (nr_bytes == 4) |
| value = dv_load_4 (source); |
| else |
| value = dv_load_2 (source); |
| |
| mmr_off = addr - gptimer->base; |
| valuep = (void *)((unsigned long)gptimer + mmr_base() + mmr_off); |
| value16p = valuep; |
| value32p = valuep; |
| |
| HW_TRACE_WRITE (); |
| |
| switch (mmr_off) |
| { |
| case mmr_offset(config): |
| if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true)) |
| return 0; |
| *value16p = value; |
| break; |
| case mmr_offset(counter): |
| case mmr_offset(period): |
| case mmr_offset(width): |
| if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, true)) |
| return 0; |
| *value32p = value; |
| break; |
| default: |
| dv_bfin_mmr_invalid (me, addr, nr_bytes, true); |
| return 0; |
| } |
| |
| return nr_bytes; |
| } |
| |
| static unsigned |
| bfin_gptimer_io_read_buffer (struct hw *me, void *dest, int space, |
| address_word addr, unsigned nr_bytes) |
| { |
| struct bfin_gptimer *gptimer = hw_data (me); |
| bu32 mmr_off; |
| bu16 *value16p; |
| bu32 *value32p; |
| void *valuep; |
| |
| /* Invalid access mode is higher priority than missing register. */ |
| if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, false)) |
| return 0; |
| |
| mmr_off = addr - gptimer->base; |
| valuep = (void *)((unsigned long)gptimer + mmr_base() + mmr_off); |
| value16p = valuep; |
| value32p = valuep; |
| |
| HW_TRACE_READ (); |
| |
| switch (mmr_off) |
| { |
| case mmr_offset(config): |
| if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false)) |
| return 0; |
| dv_store_2 (dest, *value16p); |
| break; |
| case mmr_offset(counter): |
| case mmr_offset(period): |
| case mmr_offset(width): |
| if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, false)) |
| return 0; |
| dv_store_4 (dest, *value32p); |
| break; |
| default: |
| dv_bfin_mmr_invalid (me, addr, nr_bytes, false); |
| return 0; |
| } |
| |
| return nr_bytes; |
| } |
| |
| static const struct hw_port_descriptor bfin_gptimer_ports[] = |
| { |
| { "stat", 0, 0, output_port, }, |
| { NULL, 0, 0, 0, }, |
| }; |
| |
| static void |
| attach_bfin_gptimer_regs (struct hw *me, struct bfin_gptimer *gptimer) |
| { |
| address_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 three addr/size entries"); |
| |
| 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); |
| |
| if (attach_size != BFIN_MMR_GPTIMER_SIZE) |
| hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_GPTIMER_SIZE); |
| |
| hw_attach_address (hw_parent (me), |
| 0, attach_space, attach_address, attach_size, me); |
| |
| gptimer->base = attach_address; |
| } |
| |
| static void |
| bfin_gptimer_finish (struct hw *me) |
| { |
| struct bfin_gptimer *gptimer; |
| |
| gptimer = HW_ZALLOC (me, struct bfin_gptimer); |
| |
| set_hw_data (me, gptimer); |
| set_hw_io_read_buffer (me, bfin_gptimer_io_read_buffer); |
| set_hw_io_write_buffer (me, bfin_gptimer_io_write_buffer); |
| set_hw_ports (me, bfin_gptimer_ports); |
| |
| attach_bfin_gptimer_regs (me, gptimer); |
| } |
| |
| const struct hw_descriptor dv_bfin_gptimer_descriptor[] = |
| { |
| {"bfin_gptimer", bfin_gptimer_finish,}, |
| {NULL, NULL}, |
| }; |