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Diffstat (limited to 'trunk/src/emu/machine/nvram.h')
-rw-r--r-- | trunk/src/emu/machine/nvram.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/trunk/src/emu/machine/nvram.h b/trunk/src/emu/machine/nvram.h new file mode 100644 index 00000000000..81a231c6a76 --- /dev/null +++ b/trunk/src/emu/machine/nvram.h @@ -0,0 +1,153 @@ +/*************************************************************************** + + nvram.h + + Generic non-volatile RAM. + +**************************************************************************** + + Copyright Aaron Giles + 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 AARON GILES ''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 AARON GILES 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. + +***************************************************************************/ + +#pragma once + +#ifndef __NVRAM_H__ +#define __NVRAM_H__ + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define MCFG_NVRAM_ADD_0FILL(_tag) \ + MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ + nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_ALL_0); \ + +#define MCFG_NVRAM_ADD_1FILL(_tag) \ + MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ + nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_ALL_1); \ + +#define MCFG_NVRAM_ADD_RANDOM_FILL(_tag) \ + MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ + nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_RANDOM); \ + +#define MCFG_NVRAM_ADD_NO_FILL(_tag) \ + MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ + nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_NONE); \ + +#define MCFG_NVRAM_ADD_CUSTOM_DRIVER(_tag, _class, _method) \ + MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ + nvram_device::static_set_custom_handler(*device, nvram_init_delegate(&_class::_method, #_class "::" #_method, NULL, (_class *)0)); \ + + +#define MCFG_NVRAM_REPLACE_0FILL(_tag) \ + MCFG_DEVICE_REPLACE(_tag, NVRAM, 0) \ + nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_ALL_0); \ + +#define MCFG_NVRAM_REPLACE_1FILL(_tag) \ + MCFG_DEVICE_REPLACE(_tag, NVRAM, 0) \ + nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_ALL_1); \ + +#define MCFG_NVRAM_REPLACE_RANDOM_FILL(_tag) \ + MCFG_DEVICE_REPLACE(_tag, NVRAM, 0) \ + nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_RANDOM); \ + +#define MCFG_NVRAM_REPLACE_CUSTOM_DRIVER(_tag, _class, _method) \ + MCFG_DEVICE_REPLACE(_tag, NVRAM, 0) \ + nvram_device::static_set_custom_handler(*device, nvram_init_delegate(&_class::_method, #_class "::" #_method, NULL, (_class *)0)); \ + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class nvram_device; + + +// custom initialization for default state +typedef device_delegate<void (nvram_device &, void *, size_t)> nvram_init_delegate; + + +// ======================> nvram_device + +class nvram_device : public device_t, + public device_nvram_interface +{ +public: + // values + enum default_value + { + DEFAULT_ALL_0, + DEFAULT_ALL_1, + DEFAULT_RANDOM, + DEFAULT_CUSTOM, + DEFAULT_NONE + }; + + // construction/destruction + nvram_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // inline configuration helpers + static void static_set_default_value(device_t &device, default_value value); + static void static_set_custom_handler(device_t &device, nvram_init_delegate callback); + + // controls + void set_base(void *base, size_t length) { m_base = base; m_length = length; } + +protected: + // device-level overrides + virtual void device_start(); + + // device_nvram_interface overrides + virtual void nvram_default(); + virtual void nvram_read(emu_file &file); + virtual void nvram_write(emu_file &file); + + // internal helpers + void determine_final_base(); + + // configuration state + default_value m_default_value; + nvram_init_delegate m_custom_handler; + + // runtime state + void * m_base; + size_t m_length; +}; + + +// device type definition +extern const device_type NVRAM; + + +#endif |