cbbab9cd |
1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2011 |
3 | * |
4 | * This work is licensed under the terms of GNU GPL version 2 or later. |
5 | * See the COPYING file in the top-level directory. |
6 | */ |
7 | |
8 | static int emit_ldr_type(int type, int offs, int rs, int rt) |
9 | { |
10 | switch(type) { |
11 | case LOADB_STUB: |
12 | emit_movsbl_indexed(offs,rs,rt); |
13 | break; |
14 | case LOADBU_STUB: |
15 | emit_movzbl_indexed(offs,rs,rt); |
16 | break; |
17 | case LOADH_STUB: |
18 | emit_movswl_indexed(offs,rs,rt); |
19 | break; |
20 | case LOADHU_STUB: |
21 | emit_movzwl_indexed(offs,rs,rt); |
22 | break; |
23 | case LOADW_STUB: |
24 | emit_readword_indexed(offs,rs,rt); |
25 | break; |
26 | default: |
27 | assert(0); |
28 | } |
29 | } |
30 | |
31 | static int emit_str_type(int type, int offs, int rs, int rt) |
32 | { |
33 | switch(type) { |
34 | case STOREB_STUB: |
35 | emit_writebyte_indexed(rt,offs,rs); |
36 | break; |
37 | case STOREH_STUB: |
38 | emit_writehword_indexed(rt,offs,rs); |
39 | break; |
40 | case STOREW_STUB: |
41 | emit_writeword_indexed(rt,offs,rs); |
42 | break; |
43 | default: |
44 | assert(0); |
45 | } |
46 | } |
47 | |
48 | static void convert_ram_addr(u_int a_rs, u_int a_rt, int rs, int rt) |
49 | { |
50 | if(rs<0) |
51 | emit_movimm(a_rt,rt); |
52 | else if((a_rs&~0x60000000)==a_rt) |
53 | emit_andimm(rs,~0x60000000,rt); |
54 | else if((a_rs&~0x00600000)==a_rt) |
55 | emit_andimm(rs,~0x00600000,rt); |
56 | else |
57 | emit_movimm(a_rt,rt); |
58 | } |
59 | |
60 | static int pcsx_direct_read(int type, u_int addr, int rs, int rt) |
61 | { |
62 | if((addr & 0x1f800000) == 0) { |
63 | assem_debug("pcsx_direct_read %08x ram\n",addr); |
64 | if(rt<0) |
65 | return 1; |
66 | u_int a=(addr&~0x60600000)|0x80000000; |
67 | convert_ram_addr(addr,a,rs,rt); |
68 | emit_ldr_type(type,0,rt,rt); |
69 | return 1; |
70 | } |
71 | if((addr & 0x1ff80000) == 0x1fc00000) { |
72 | assem_debug("pcsx_direct_read %08x bios\n",addr); |
73 | if(rt<0) |
74 | return 1; |
75 | emit_movimm((u_int)&psxR[addr&0x7ffff],rt); |
76 | emit_ldr_type(type,0,rt,rt); |
77 | return 1; |
78 | } |
79 | if((addr & 0xfffff000) == 0x1f800000) { |
80 | assem_debug("pcsx_direct_read %08x scratchpad\n",addr); |
81 | if(rt<0) |
82 | return 1; |
83 | if(type==LOADW_STUB||type==LOADBU_STUB||(addr&0xf00)==0) { |
84 | emit_readword((int)&psxH_ptr,rt); |
85 | emit_ldr_type(type,addr&0xfff,rt,rt); |
86 | } else { |
87 | emit_movimm((u_int)&psxH[addr&0xfff],rt); |
88 | emit_ldr_type(type,0,rt,rt); |
89 | } |
90 | return 1; |
91 | } |
92 | |
93 | assem_debug("pcsx_direct_read %08x miss\n",addr); |
94 | return 0; |
95 | } |
96 | |
97 | static int pcsx_direct_write(int type, u_int addr, int rs, int rt, signed char *regmap) |
98 | { |
99 | if((addr & 0x1f800000) == 0) { |
100 | assem_debug("pcsx_direct_write %08x ram\n",addr); |
101 | u_int a=(addr&~0x60600000)|0x80000000; |
102 | convert_ram_addr(addr,a,rs,HOST_TEMPREG); |
103 | emit_str_type(type,0,HOST_TEMPREG,rt); |
104 | |
105 | int ir=get_reg(regmap,INVCP); |
106 | assert(ir>=0); |
274c4243 |
107 | emit_cmpmem_indexedsr12_reg(ir,HOST_TEMPREG,1); |
cbbab9cd |
108 | emit_callne(invalidate_addr_reg[rs]); |
109 | return 1; |
110 | } |
111 | if((addr & 0xfffff000) == 0x1f800000) { |
112 | assem_debug("pcsx_direct_write %08x scratchpad\n",addr); |
113 | if(type==STOREW_STUB||type==STOREB_STUB||(addr&0xf00)==0) { |
114 | emit_readword((int)&psxH_ptr,HOST_TEMPREG); |
115 | emit_str_type(type,addr&0xfff,HOST_TEMPREG,rt); |
116 | } else { |
117 | emit_movimm((u_int)&psxH[addr&0xfff],HOST_TEMPREG); |
118 | emit_str_type(type,0,HOST_TEMPREG,rt); |
119 | } |
120 | return 1; |
121 | } |
122 | |
123 | assem_debug("pcsx_direct_write %08x miss\n",addr); |
124 | return 0; |
125 | } |
126 | |
127 | // vim:shiftwidth=2:expandtab |