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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
0ca2426b SG |
2 | /* |
3 | * From Coreboot | |
4 | * | |
5 | * Copyright (C) 2001 Ronald G. Minnich | |
6 | * Copyright (C) 2005 Nick.Barker9@btinternet.com | |
7 | * Copyright (C) 2007-2009 coresystems GmbH | |
0ca2426b SG |
8 | */ |
9 | ||
d678a59d | 10 | #include <common.h> |
f7ae49fc | 11 | #include <log.h> |
0ca2426b SG |
12 | #include <asm/pci.h> |
13 | #include "bios_emul.h" | |
14 | ||
15 | /* errors go in AH. Just set these up so that word assigns will work */ | |
16 | enum { | |
17 | PCIBIOS_SUCCESSFUL = 0x0000, | |
18 | PCIBIOS_UNSUPPORTED = 0x8100, | |
19 | PCIBIOS_BADVENDOR = 0x8300, | |
20 | PCIBIOS_NODEV = 0x8600, | |
21 | PCIBIOS_BADREG = 0x8700 | |
22 | }; | |
23 | ||
24 | int int10_handler(void) | |
25 | { | |
26 | static u8 cursor_row, cursor_col; | |
27 | int res = 0; | |
28 | ||
29 | switch ((M.x86.R_EAX & 0xff00) >> 8) { | |
30 | case 0x01: /* Set cursor shape */ | |
31 | res = 1; | |
32 | break; | |
33 | case 0x02: /* Set cursor position */ | |
34 | if (cursor_row != ((M.x86.R_EDX >> 8) & 0xff) || | |
35 | cursor_col >= (M.x86.R_EDX & 0xff)) { | |
36 | debug("\n"); | |
37 | } | |
38 | cursor_row = (M.x86.R_EDX >> 8) & 0xff; | |
39 | cursor_col = M.x86.R_EDX & 0xff; | |
40 | res = 1; | |
41 | break; | |
42 | case 0x03: /* Get cursor position */ | |
43 | M.x86.R_EAX &= 0x00ff; | |
44 | M.x86.R_ECX = 0x0607; | |
45 | M.x86.R_EDX = (cursor_row << 8) | cursor_col; | |
46 | res = 1; | |
47 | break; | |
48 | case 0x06: /* Scroll up */ | |
49 | debug("\n"); | |
50 | res = 1; | |
51 | break; | |
52 | case 0x08: /* Get Character and Mode at Cursor Position */ | |
53 | M.x86.R_EAX = 0x0f00 | 'A'; /* White on black 'A' */ | |
54 | res = 1; | |
55 | break; | |
56 | case 0x09: /* Write Character and attribute */ | |
57 | case 0x0e: /* Write Character */ | |
58 | debug("%c", M.x86.R_EAX & 0xff); | |
59 | res = 1; | |
60 | break; | |
61 | case 0x0f: /* Get video mode */ | |
62 | M.x86.R_EAX = 0x5002; /*80 x 25 */ | |
63 | M.x86.R_EBX &= 0x00ff; | |
64 | res = 1; | |
65 | break; | |
66 | default: | |
67 | printf("Unknown INT10 function %04x\n", M.x86.R_EAX & 0xffff); | |
68 | break; | |
69 | } | |
70 | return res; | |
71 | } | |
72 | ||
73 | int int12_handler(void) | |
74 | { | |
75 | M.x86.R_EAX = 64 * 1024; | |
76 | return 1; | |
77 | } | |
78 | ||
79 | int int16_handler(void) | |
80 | { | |
81 | int res = 0; | |
82 | ||
83 | switch ((M.x86.R_EAX & 0xff00) >> 8) { | |
84 | case 0x00: /* Check for Keystroke */ | |
85 | M.x86.R_EAX = 0x6120; /* Space Bar, Space */ | |
86 | res = 1; | |
87 | break; | |
88 | case 0x01: /* Check for Keystroke */ | |
89 | M.x86.R_EFLG |= 1 << 6; /* Zero Flag set (no key available) */ | |
90 | res = 1; | |
91 | break; | |
92 | default: | |
93 | printf("Unknown INT16 function %04x\n", M.x86.R_EAX & 0xffff); | |
94 | ||
95 | break; | |
96 | } | |
97 | return res; | |
98 | } | |
99 | ||
100 | #define PCI_CONFIG_SPACE_TYPE1 (1 << 0) | |
101 | #define PCI_SPECIAL_CYCLE_TYPE1 (1 << 4) | |
102 | ||
103 | int int1a_handler(void) | |
104 | { | |
105 | unsigned short func = (unsigned short)M.x86.R_EAX; | |
106 | int retval = 1; | |
107 | unsigned short devid, vendorid, devfn; | |
7d8e4042 | 108 | struct udevice *dev; |
0ca2426b SG |
109 | /* Use short to get rid of gabage in upper half of 32-bit register */ |
110 | short devindex; | |
111 | unsigned char bus; | |
7d8e4042 | 112 | pci_dev_t bdf; |
0ca2426b SG |
113 | u32 dword; |
114 | u16 word; | |
115 | u8 byte, reg; | |
7d8e4042 | 116 | int ret; |
0ca2426b SG |
117 | |
118 | switch (func) { | |
119 | case 0xb101: /* PCIBIOS Check */ | |
120 | M.x86.R_EDX = 0x20494350; /* ' ICP' */ | |
121 | M.x86.R_EAX &= 0xffff0000; /* Clear AH / AL */ | |
122 | M.x86.R_EAX |= PCI_CONFIG_SPACE_TYPE1 | | |
123 | PCI_SPECIAL_CYCLE_TYPE1; | |
124 | /* | |
125 | * last bus in the system. Hard code to 255 for now. | |
126 | * dev_enumerate() does not seem to tell us (publically) | |
127 | */ | |
128 | M.x86.R_ECX = 0xff; | |
129 | M.x86.R_EDI = 0x00000000; /* protected mode entry */ | |
130 | retval = 1; | |
131 | break; | |
132 | case 0xb102: /* Find Device */ | |
133 | devid = M.x86.R_ECX; | |
134 | vendorid = M.x86.R_EDX; | |
135 | devindex = M.x86.R_ESI; | |
7d8e4042 SG |
136 | bdf = -1; |
137 | ret = dm_pci_find_device(vendorid, devid, devindex, &dev); | |
138 | if (!ret) { | |
0ca2426b | 139 | unsigned short busdevfn; |
7d8e4042 SG |
140 | |
141 | bdf = dm_pci_get_bdf(dev); | |
0ca2426b SG |
142 | M.x86.R_EAX &= 0xffff00ff; /* Clear AH */ |
143 | M.x86.R_EAX |= PCIBIOS_SUCCESSFUL; | |
144 | /* | |
145 | * busnum is an unsigned char; | |
146 | * devfn is an int, so we mask it off. | |
147 | */ | |
7d8e4042 SG |
148 | busdevfn = (PCI_BUS(bdf) << 8) | PCI_DEV(bdf) << 3 | |
149 | PCI_FUNC(bdf); | |
0ca2426b SG |
150 | debug("0x%x: return 0x%x\n", func, busdevfn); |
151 | M.x86.R_EBX = busdevfn; | |
152 | retval = 1; | |
153 | } else { | |
154 | M.x86.R_EAX &= 0xffff00ff; /* Clear AH */ | |
155 | M.x86.R_EAX |= PCIBIOS_NODEV; | |
156 | retval = 0; | |
157 | } | |
158 | break; | |
159 | case 0xb10a: /* Read Config Dword */ | |
160 | case 0xb109: /* Read Config Word */ | |
161 | case 0xb108: /* Read Config Byte */ | |
162 | case 0xb10d: /* Write Config Dword */ | |
163 | case 0xb10c: /* Write Config Word */ | |
164 | case 0xb10b: /* Write Config Byte */ | |
165 | devfn = M.x86.R_EBX & 0xff; | |
166 | bus = M.x86.R_EBX >> 8; | |
167 | reg = M.x86.R_EDI; | |
7d8e4042 SG |
168 | bdf = PCI_BDF(bus, devfn >> 3, devfn & 7); |
169 | ||
170 | ret = dm_pci_bus_find_bdf(bdf, &dev); | |
171 | if (ret) { | |
172 | debug("%s: Device %x not found\n", __func__, bdf); | |
173 | break; | |
174 | } | |
1441d81a | 175 | |
0ca2426b SG |
176 | switch (func) { |
177 | case 0xb108: /* Read Config Byte */ | |
7d8e4042 | 178 | dm_pci_read_config8(dev, reg, &byte); |
0ca2426b SG |
179 | M.x86.R_ECX = byte; |
180 | break; | |
181 | case 0xb109: /* Read Config Word */ | |
7d8e4042 | 182 | dm_pci_read_config16(dev, reg, &word); |
0ca2426b SG |
183 | M.x86.R_ECX = word; |
184 | break; | |
185 | case 0xb10a: /* Read Config Dword */ | |
7d8e4042 | 186 | dm_pci_read_config32(dev, reg, &dword); |
0ca2426b SG |
187 | M.x86.R_ECX = dword; |
188 | break; | |
189 | case 0xb10b: /* Write Config Byte */ | |
190 | byte = M.x86.R_ECX; | |
7d8e4042 | 191 | dm_pci_write_config8(dev, reg, byte); |
0ca2426b SG |
192 | break; |
193 | case 0xb10c: /* Write Config Word */ | |
194 | word = M.x86.R_ECX; | |
7d8e4042 | 195 | dm_pci_write_config16(dev, reg, word); |
0ca2426b SG |
196 | break; |
197 | case 0xb10d: /* Write Config Dword */ | |
198 | dword = M.x86.R_ECX; | |
7d8e4042 | 199 | dm_pci_write_config32(dev, reg, dword); |
0ca2426b SG |
200 | break; |
201 | } | |
0ca2426b SG |
202 | #ifdef CONFIG_REALMODE_DEBUG |
203 | debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%x\n", func, | |
204 | bus, devfn, reg, M.x86.R_ECX); | |
205 | #endif | |
206 | M.x86.R_EAX &= 0xffff00ff; /* Clear AH */ | |
207 | M.x86.R_EAX |= PCIBIOS_SUCCESSFUL; | |
208 | retval = 1; | |
209 | break; | |
210 | default: | |
211 | printf("UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func); | |
212 | M.x86.R_EAX &= 0xffff00ff; /* Clear AH */ | |
213 | M.x86.R_EAX |= PCIBIOS_UNSUPPORTED; | |
214 | retval = 0; | |
215 | break; | |
216 | } | |
217 | ||
218 | return retval; | |
219 | } |