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Diffstat (limited to 'sim/bfin/dv-bfin_pfmon.c')
| -rw-r--r-- | sim/bfin/dv-bfin_pfmon.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/sim/bfin/dv-bfin_pfmon.c b/sim/bfin/dv-bfin_pfmon.c new file mode 100644 index 0000000..8b3e442 --- /dev/null +++ b/sim/bfin/dv-bfin_pfmon.c @@ -0,0 +1,155 @@ +/* Blackfin Performance Monitor model. + + Copyright (C) 2010-2011 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/>. */ + +#include "config.h" + +#include "sim-main.h" +#include "devices.h" +#include "dv-bfin_pfmon.h" + +/* XXX: This is mostly a stub. */ + +struct bfin_pfmon +{ + bu32 base; + + /* Order after here is important -- matches hardware MMR layout. */ + bu32 ctl; + bu32 _pad0[63]; + bu32 cntr0, cntr1; +}; +#define mmr_base() offsetof(struct bfin_pfmon, ctl) +#define mmr_offset(mmr) (offsetof(struct bfin_pfmon, mmr) - mmr_base()) + +static const char * const mmr_names[] = +{ + "PFCTL", [mmr_offset (cntr0)] = "PFCNTR0", "PFCNTR1", +}; +#define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>") + +static unsigned +bfin_pfmon_io_write_buffer (struct hw *me, const void *source, int space, + address_word addr, unsigned nr_bytes) +{ + struct bfin_pfmon *pfmon = hw_data (me); + bu32 mmr_off; + bu32 value; + bu32 *valuep; + + value = dv_load_4 (source); + mmr_off = addr - pfmon->base; + valuep = (void *)((unsigned long)pfmon + mmr_base() + mmr_off); + + HW_TRACE_WRITE (); + + switch (mmr_off) + { + case mmr_offset(ctl): + case mmr_offset(cntr0): + case mmr_offset(cntr1): + *valuep = value; + break; + default: + dv_bfin_mmr_invalid (me, addr, nr_bytes, true); + break; + } + + return nr_bytes; +} + +static unsigned +bfin_pfmon_io_read_buffer (struct hw *me, void *dest, int space, + address_word addr, unsigned nr_bytes) +{ + struct bfin_pfmon *pfmon = hw_data (me); + bu32 mmr_off; + bu32 value; + bu32 *valuep; + + mmr_off = addr - pfmon->base; + valuep = (void *)((unsigned long)pfmon + mmr_base() + mmr_off); + + HW_TRACE_READ (); + + switch (mmr_off) + { + case mmr_offset(ctl): + case mmr_offset(cntr0): + case mmr_offset(cntr1): + value = *valuep; + break; + default: + while (1) /* Core MMRs -> exception -> doesn't return. */ + dv_bfin_mmr_invalid (me, addr, nr_bytes, false); + break; + } + + dv_store_4 (dest, value); + + return nr_bytes; +} + +static void +attach_bfin_pfmon_regs (struct hw *me, struct bfin_pfmon *pfmon) +{ + 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_COREMMR_PFMON_SIZE) + hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_PFMON_SIZE); + + hw_attach_address (hw_parent (me), + 0, attach_space, attach_address, attach_size, me); + + pfmon->base = attach_address; +} + +static void +bfin_pfmon_finish (struct hw *me) +{ + struct bfin_pfmon *pfmon; + + pfmon = HW_ZALLOC (me, struct bfin_pfmon); + + set_hw_data (me, pfmon); + set_hw_io_read_buffer (me, bfin_pfmon_io_read_buffer); + set_hw_io_write_buffer (me, bfin_pfmon_io_write_buffer); + + attach_bfin_pfmon_regs (me, pfmon); +} + +const struct hw_descriptor dv_bfin_pfmon_descriptor[] = +{ + {"bfin_pfmon", bfin_pfmon_finish,}, + {NULL, NULL}, +}; |