mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-06-25 21:56:11 +02:00
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
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* Copyright (C) 2002-2019 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* ARMv4 (little endian) backend by M-HT (common data/functions) */
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// some configuring defines that specify the capabilities of this architecture
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// or aspects of the recompiling
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// protect FC_ADDR over function calls if necessaray
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// #define DRC_PROTECT_ADDR_REG
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// try to use non-flags generating functions if possible
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#define DRC_FLAGS_INVALIDATION
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// try to replace _simple functions by code
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#define DRC_FLAGS_INVALIDATION_DCODE
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// type with the same size as a pointer
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#define DRC_PTR_SIZE_IM Bit32u
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// calling convention modifier
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#define DRC_CALL_CONV /* nothing */
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#define DRC_FC /* nothing */
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// use FC_REGS_ADDR to hold the address of "cpu_regs" and to access it using FC_REGS_ADDR
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#define DRC_USE_REGS_ADDR
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// use FC_SEGS_ADDR to hold the address of "Segs" and to access it using FC_SEGS_ADDR
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#define DRC_USE_SEGS_ADDR
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// register mapping
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typedef Bit8u HostReg;
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// "lo" registers
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#define HOST_r0 0
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#define HOST_r1 1
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#define HOST_r2 2
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#define HOST_r3 3
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#define HOST_r4 4
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#define HOST_r5 5
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#define HOST_r6 6
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#define HOST_r7 7
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// "hi" registers
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#define HOST_r8 8
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#define HOST_r9 9
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#define HOST_r10 10
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#define HOST_r11 11
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#define HOST_r12 12
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#define HOST_r13 13
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#define HOST_r14 14
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#define HOST_r15 15
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// register aliases
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// "lo" registers
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#define HOST_a1 HOST_r0
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#define HOST_a2 HOST_r1
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#define HOST_a3 HOST_r2
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#define HOST_a4 HOST_r3
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#define HOST_v1 HOST_r4
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#define HOST_v2 HOST_r5
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#define HOST_v3 HOST_r6
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#define HOST_v4 HOST_r7
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// "hi" registers
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#define HOST_v5 HOST_r8
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#define HOST_v6 HOST_r9
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#define HOST_v7 HOST_r10
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#define HOST_v8 HOST_r11
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#define HOST_ip HOST_r12
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#define HOST_sp HOST_r13
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#define HOST_lr HOST_r14
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#define HOST_pc HOST_r15
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static void cache_block_closing(Bit8u* block_start,Bitu block_size) {
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#if (__ARM_EABI__)
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//flush cache - eabi
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register unsigned long _beg __asm ("a1") = (unsigned long)(block_start); // block start
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register unsigned long _end __asm ("a2") = (unsigned long)(block_start+block_size); // block end
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register unsigned long _flg __asm ("a3") = 0;
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register unsigned long _par __asm ("r7") = 0xf0002; // sys_cacheflush
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__asm __volatile ("swi 0x0"
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: // no outputs
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: "r" (_beg), "r" (_end), "r" (_flg), "r" (_par)
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);
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#else
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// GP2X BEGIN
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//flush cache - old abi
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register unsigned long _beg __asm ("a1") = (unsigned long)(block_start); // block start
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register unsigned long _end __asm ("a2") = (unsigned long)(block_start+block_size); // block end
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register unsigned long _flg __asm ("a3") = 0;
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__asm __volatile ("swi 0x9f0002 @ sys_cacheflush"
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: // no outputs
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: "r" (_beg), "r" (_end), "r" (_flg)
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);
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// GP2X END
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#endif
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}
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