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Diffstat (limited to 'src/devices/cpu/h8/h8_watchdog.h')
-rw-r--r-- | src/devices/cpu/h8/h8_watchdog.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/devices/cpu/h8/h8_watchdog.h b/src/devices/cpu/h8/h8_watchdog.h new file mode 100644 index 00000000000..d5c0d5d21a1 --- /dev/null +++ b/src/devices/cpu/h8/h8_watchdog.h @@ -0,0 +1,99 @@ +/*************************************************************************** + + h8_watchdog.h + + H8 watchdog/timer + +**************************************************************************** + + Copyright Olivier Galibert + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are + met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + * Neither the name 'MAME' nor the names of its contributors may be + used to endorse or promote products derived from this software + without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY OLIVIER GALIBERT ''AS IS'' AND ANY EXPRESS OR + IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL OLIVIER GALIBERT BE LIABLE FOR ANY DIRECT, + INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + POSSIBILITY OF SUCH DAMAGE. + +***************************************************************************/ + +#ifndef __H8_WATCHDOG_H__ +#define __H8_WATCHDOG_H__ + +#include "h8.h" +#include "h8_intc.h" + +#define MCFG_H8_WATCHDOG_ADD( _tag, intc, irq, type ) \ + MCFG_DEVICE_ADD( _tag, H8_WATCHDOG, 0 ) \ + downcast<h8_watchdog_device *>(device)->set_info(intc, irq, type); + +class h8_watchdog_device : public device_t { +public: + enum { B, H, S }; + + h8_watchdog_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + void set_info(const char *intc, int irq, int type); + + UINT64 internal_update(UINT64 current_time); + + DECLARE_READ16_MEMBER(wd_r); + DECLARE_WRITE16_MEMBER(wd_w); + DECLARE_READ16_MEMBER(rst_r); + DECLARE_WRITE16_MEMBER(rst_w); + +protected: + virtual void device_start() override; + virtual void device_reset() override; + +private: + enum { + TCSR_CKS = 0x07, + TCSR_NMI = 0x08, + TCSR_TME = 0x20, + TCSR_WT = 0x40, + TCSR_OVF = 0x80, + + RST_RSTS = 0x20, + RST_RSTE = 0x40, + RST_RSTEO = 0x40, + RST_WRST = 0x80 + }; + + static const int div_bh[8]; + static const int div_s[8]; + + required_device<h8_device> cpu; + h8_intc_device *intc; + const char *intc_tag; + int irq; + int type; + UINT8 tcnt, tcsr, rst; + UINT64 tcnt_cycle_base; + + void tcnt_update(UINT64 current_time = 0); +}; + +extern const device_type H8_WATCHDOG; + +#endif |