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ef79bbde P |
1 | /*************************************************************************** |
2 | * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team * | |
3 | * * | |
4 | * This program is free software; you can redistribute it and/or modify * | |
5 | * it under the terms of the GNU General Public License as published by * | |
6 | * the Free Software Foundation; either version 2 of the License, or * | |
7 | * (at your option) any later version. * | |
8 | * * | |
9 | * This program is distributed in the hope that it will be useful, * | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
12 | * GNU General Public License for more details. * | |
13 | * * | |
14 | * You should have received a copy of the GNU General Public License * | |
15 | * along with this program; if not, write to the * | |
16 | * Free Software Foundation, Inc., * | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. * | |
18 | ***************************************************************************/ | |
19 | ||
20 | /* | |
21 | * Internal PSX HLE functions. | |
22 | */ | |
23 | ||
24 | #include "psxhle.h" | |
25 | ||
833174ec | 26 | #if 0 |
27 | #define PSXHLE_LOG SysPrintf | |
28 | #else | |
29 | #define PSXHLE_LOG(...) | |
30 | #endif | |
31 | ||
ef79bbde P |
32 | static void hleDummy() { |
33 | psxRegs.pc = psxRegs.GPR.n.ra; | |
34 | ||
35 | psxBranchTest(); | |
36 | } | |
37 | ||
38 | static void hleA0() { | |
39 | u32 call = psxRegs.GPR.n.t1 & 0xff; | |
40 | ||
41 | if (biosA0[call]) biosA0[call](); | |
42 | ||
43 | psxBranchTest(); | |
44 | } | |
45 | ||
46 | static void hleB0() { | |
47 | u32 call = psxRegs.GPR.n.t1 & 0xff; | |
48 | ||
49 | if (biosB0[call]) biosB0[call](); | |
50 | ||
51 | psxBranchTest(); | |
52 | } | |
53 | ||
54 | static void hleC0() { | |
55 | u32 call = psxRegs.GPR.n.t1 & 0xff; | |
56 | ||
57 | if (biosC0[call]) biosC0[call](); | |
58 | ||
59 | psxBranchTest(); | |
60 | } | |
61 | ||
62 | static void hleBootstrap() { // 0xbfc00000 | |
833174ec | 63 | PSXHLE_LOG("hleBootstrap\n"); |
ef79bbde P |
64 | CheckCdrom(); |
65 | LoadCdrom(); | |
833174ec | 66 | PSXHLE_LOG("CdromLabel: \"%s\": PC = %8.8lx (SP = %8.8lx)\n", CdromLabel, psxRegs.pc, psxRegs.GPR.n.sp); |
ef79bbde P |
67 | } |
68 | ||
69 | typedef struct { | |
70 | u32 _pc0; | |
71 | u32 gp0; | |
72 | u32 t_addr; | |
73 | u32 t_size; | |
74 | u32 d_addr; | |
75 | u32 d_size; | |
76 | u32 b_addr; | |
77 | u32 b_size; | |
78 | u32 S_addr; | |
79 | u32 s_size; | |
80 | u32 _sp,_fp,_gp,ret,base; | |
81 | } EXEC; | |
82 | ||
83 | static void hleExecRet() { | |
84 | EXEC *header = (EXEC*)PSXM(psxRegs.GPR.n.s0); | |
85 | ||
833174ec | 86 | PSXHLE_LOG("ExecRet %x: %x\n", psxRegs.GPR.n.s0, header->ret); |
ef79bbde P |
87 | |
88 | psxRegs.GPR.n.ra = header->ret; | |
89 | psxRegs.GPR.n.sp = header->_sp; | |
90 | psxRegs.GPR.n.s8 = header->_fp; | |
91 | psxRegs.GPR.n.gp = header->_gp; | |
92 | psxRegs.GPR.n.s0 = header->base; | |
93 | ||
94 | psxRegs.GPR.n.v0 = 1; | |
95 | psxRegs.pc = psxRegs.GPR.n.ra; | |
96 | } | |
97 | ||
423b0da8 | 98 | const void (*psxHLEt[8])() = { |
ef79bbde P |
99 | hleDummy, hleA0, hleB0, hleC0, |
100 | hleBootstrap, hleExecRet, | |
101 | hleDummy, hleDummy | |
102 | }; |