X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=cpu%2FCyclone%2Fconfig_uae4all.h;h=d10a2cb93d3bbff09823e6082879329ab92697ed;hb=ce5be1b51a71786c90d373ffb7f92dc8245f9b12;hp=f84dc6d219258f4146d8c843efb76cb245a4c0c6;hpb=99464b6230bbe515dffb8893f6b6b51031be9157;p=picodrive.git diff --git a/cpu/Cyclone/config_uae4all.h b/cpu/Cyclone/config_uae4all.h index f84dc6d..d10a2cb 100644 --- a/cpu/Cyclone/config_uae4all.h +++ b/cpu/Cyclone/config_uae4all.h @@ -2,61 +2,17 @@ /** * Cyclone 68000 configuration file + * + * Used for UAE4ALL Cyclone build. + * See config.h in Cyclone directory for option descriptions. **/ -/* - * If this option is enabled, Microsoft ARMASM compatible output is generated - * (output file - Cyclone.asm). Otherwise GNU as syntax is used (Cyclone.s). - */ #define USE_MS_SYNTAX 0 - -/* - * Enable this option if you are going to use Cyclone to emulate Genesis / - * Mega Drive system. As VDP chip in these systems had control of the bus, - * several instructions were acting differently, for example TAS did'n have - * the write-back phase. That will be emulated, if this option is enabled. - */ #define CYCLONE_FOR_GENESIS 0 - -/* - * This option compresses Cyclone's jumptable. Because of this the executable - * will be smaller and load slightly faster and less relocations will be needed. - * This also fixes the crash problem with 0xfffe and 0xffff opcodes. - * Warning: if you enable this, you MUST call CycloneInit() before calling - * CycloneRun(), or else it will crash. - */ #define COMPRESS_JUMPTABLE 1 - -/* - * Address mask for memory hadlers. The bits set will be masked out of address - * parameter, which is passed to r/w memory handlers. - * Using 0xff000000 means that only 24 least significant bits should be used. - * Set to 0 if you want to mask unused address bits in the memory handlers yourself. - */ #define MEMHANDLERS_ADDR_MASK 0 -/* - * Cyclone keeps the 4 least significant bits of SR, PC+membase and it's cycle - * counter in ARM registers instead of the context for performance reasons. If you for - * any reason need to access them in your memory handlers, enable the options below, - * otherwise disable them to improve performance. - * - * MEMHANDLERS_NEED_PC updates .pc context field with PC value effective at the time - * when memhandler was called (opcode address + 2-10 bytes). - * MEMHANDLERS_NEED_PREV_PC updates .prev_pc context field to currently executed - * opcode address + 2. - * Note that .pc and .prev_pc values are always real pointers to memory, so you must - * subtract .membase to get M68k PC value. - * - * Warning: updating PC in memhandlers is dangerous, as Cyclone may internally - * increment the PC before fetching the next instruction and continue executing - * at wrong location. It's better to wait until Cyclone CycloneRun() finishes. - * - * Warning: if you enable MEMHANDLERS_CHANGE_CYCLES, you must also enable - * MEMHANDLERS_NEED_CYCLES, or else Cyclone will keep reloading the same cycle - * count and this will screw timing (if not cause a deadlock). - */ #define MEMHANDLERS_NEED_PC 1 #define MEMHANDLERS_NEED_PREV_PC 0 #define MEMHANDLERS_NEED_FLAGS 0 @@ -65,107 +21,24 @@ #define MEMHANDLERS_CHANGE_FLAGS 0 #define MEMHANDLERS_CHANGE_CYCLES 1 -/* - * If enabled, Cyclone will call .IrqCallback routine from it's context whenever it - * acknowledges an IRQ. IRQ level (.irq) is not cleared automatically, do this in your - * handler if needed. - * This function must either return vector number to use for interrupt exception, - * CYCLONE_INT_ACK_AUTOVECTOR to use autovector (this is the most common case), or - * CYCLONE_INT_ACK_SPURIOUS (least common case). - * If disabled, it simply uses appropriate autovector, clears the IRQ level and - * continues execution. - */ #define USE_INT_ACK_CALLBACK 1 -/* - * Enable this if you need old PC, flags or cycles; - * or you change cycles in your IrqCallback function. - */ #define INT_ACK_NEEDS_STUFF 0 #define INT_ACK_CHANGES_CYCLES 0 -/* - * If enabled, .ResetCallback is called from the context, whenever RESET opcode is - * encountered. All context members are valid and can be changed. - * If disabled, RESET opcode acts as an NOP. - */ #define USE_RESET_CALLBACK 0 - -/* - * If enabled, UnrecognizedCallback is called if an invalid opcode is - * encountered. All context members are valid and can be changed. The handler - * should return zero if you want Cyclone to gererate "Illegal Instruction" - * exception after this, or nonzero if not. In the later case you should change - * the PC by yourself, or else Cyclone will keep executing that opcode all over - * again. - * If disabled, "Illegal Instruction" exception is generated and execution is - * continued. - */ #define USE_UNRECOGNIZED_CALLBACK 1 - -/* - * This option will also call UnrecognizedCallback for a-line and f-line - * (0xa*** and 0xf***) opcodes the same way as described above, only appropriate - * exceptions will be generated. - */ #define USE_AFLINE_CALLBACK 1 -/* - * This makes Cyclone to call checkpc from it's context whenever it changes the PC - * by a large value. It takes and should return the PC value in PC+membase form. - * The flags and cycle counter are not valid in this function. - */ #define USE_CHECKPC_CALLBACK 1 - -/* - * This determines if checkpc() should be called after jumps when 8 and 16 bit - * displacement values were used. - */ #define USE_CHECKPC_OFFSETBITS_16 1 #define USE_CHECKPC_OFFSETBITS_8 0 - -/* - * Call checkpc() after DBcc jumps (which use 16bit displacement). Cyclone prior to - * 0.0087 never did that. - */ #define USE_CHECKPC_DBRA 0 -/* - * When this option is enabled Cyclone will do two word writes instead of one - * long write when handling MOVE.L with pre-decrementing destination, as described in - * Bart Trzynadlowski's doc (http://www.trzy.org/files/68knotes.txt). - * Enable this if you are emulating a 16 bit system. - */ #define SPLIT_MOVEL_PD 1 -/* - * Enable emulation of trace mode. Shouldn't cause any performance decrease, so it - * should be safe to keep this ON. - */ #define EMULATE_TRACE 1 - -/* - * If enabled, address error exception will be generated if 68k code jumps to an - * odd address. Causes very small performance hit (2 ARM instructions for every - * emulated jump/return/exception in normal case). - * Note: checkpc() must not clear least significant bit of rebased address - * for this to work, as checks are performed after calling checkpc(). - */ #define EMULATE_ADDRESS_ERRORS_JUMP 1 - -/* - * If enabled, address error exception will be generated if 68k code tries to - * access a word or longword at an odd address. The performance cost is also 2 ARM - * instructions per access (for address error checks). - */ #define EMULATE_ADDRESS_ERRORS_IO 1 - -/* - * If an address error happens during another address error processing, - * the processor halts until it is reset (catastrophic system failure, as the manual - * states). This option enables halt emulation. - * Note that this might be not desired if it is known that emulated system should - * never reach this state. - */ #define EMULATE_HALT 0