1 // PCI BIOS (int 1a/b1) calls
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU GPLv3 license.
8 #include "types.h" // u32
9 #include "util.h" // handle_1ab1
10 #include "pci.h" // pci_config_readl
12 #define RET_FUNC_NOT_SUPPORTED 0x81
13 #define RET_BAD_VENDOR_ID 0x83
14 #define RET_DEVICE_NOT_FOUND 0x86
15 #define RET_BUFFER_TOO_SMALL 0x89
19 handle_1ab101(struct bregs *regs)
24 regs->edx = 0x20494350; // "PCI "
25 // XXX - bochs bios code sets edi to point to 32bit code - but no
26 // reference to this in spec.
32 handle_1ab102(struct bregs *regs)
35 int ret = pci_find_device(regs->cx, regs->dx, regs->si, &d);
37 set_code_fail(regs, RET_DEVICE_NOT_FOUND);
42 set_code_success(regs);
47 handle_1ab103(struct bregs *regs)
50 int ret = pci_find_class(regs->ecx, regs->si, &d);
52 set_code_fail(regs, RET_DEVICE_NOT_FOUND);
57 set_code_success(regs);
60 // read configuration byte
62 handle_1ab108(struct bregs *regs)
64 regs->cl = pci_config_readb(pci_bd(regs->bh, regs->bl), regs->di);
65 set_code_success(regs);
68 // read configuration word
70 handle_1ab109(struct bregs *regs)
72 regs->cx = pci_config_readw(pci_bd(regs->bh, regs->bl), regs->di);
73 set_code_success(regs);
76 // read configuration dword
78 handle_1ab10a(struct bregs *regs)
80 regs->ecx = pci_config_readl(pci_bd(regs->bh, regs->bl), regs->di);
81 set_code_success(regs);
84 // write configuration byte
86 handle_1ab10b(struct bregs *regs)
88 pci_config_writeb(pci_bd(regs->bh, regs->bl), regs->di, regs->cl);
89 set_code_success(regs);
92 // write configuration word
94 handle_1ab10c(struct bregs *regs)
96 pci_config_writew(pci_bd(regs->bh, regs->bl), regs->di, regs->cx);
97 set_code_success(regs);
100 // write configuration dword
102 handle_1ab10d(struct bregs *regs)
104 pci_config_writel(pci_bd(regs->bh, regs->bl), regs->di, regs->ecx);
105 set_code_success(regs);
108 // get irq routing options
110 handle_1ab10e(struct bregs *regs)
112 struct pir_header *pirtable_far = (struct pir_header*)GET_EBDA(pir_loc);
113 if (! pirtable_far) {
114 set_code_fail(regs, RET_FUNC_NOT_SUPPORTED);
118 // Validate and update size.
119 u16 size = GET_FARVAR(regs->es, *(u16*)(regs->di+0));
120 u16 pirsize = (GET_FARPTR(pirtable_far->size)
121 - sizeof(struct pir_header));
122 SET_FARVAR(regs->es, *(u16*)(regs->di+0), pirsize);
123 if (size < pirsize) {
124 set_code_fail(regs, RET_BUFFER_TOO_SMALL);
129 u16 d = (GET_FARVAR(regs->es, *(u16*)(regs->di+2)) + 0);
130 u16 destseg = GET_FARVAR(regs->es, *(u16*)(regs->di+4));
132 // Memcpy pir table slots to dest buffer.
133 memcpy(MAKE_FARPTR(destseg, d), pirtable_far, pirsize);
135 // XXX - bochs bios sets bx to (1 << 9) | (1 << 11)
136 regs->bx = GET_FARPTR(pirtable_far->exclusive_irqs);
137 set_code_success(regs);
141 handle_1ab1XX(struct bregs *regs)
143 set_code_fail(regs, RET_FUNC_NOT_SUPPORTED);
147 handle_1ab1(struct bregs *regs)
151 if (! CONFIG_PCIBIOS) {
157 case 0x01: handle_1ab101(regs); break;
158 case 0x02: handle_1ab102(regs); break;
159 case 0x03: handle_1ab103(regs); break;
160 case 0x08: handle_1ab108(regs); break;
161 case 0x09: handle_1ab109(regs); break;
162 case 0x0a: handle_1ab10a(regs); break;
163 case 0x0b: handle_1ab10b(regs); break;
164 case 0x0c: handle_1ab10c(regs); break;
165 case 0x0d: handle_1ab10d(regs); break;
166 case 0x0e: handle_1ab10e(regs); break;
167 default: handle_1ab1XX(regs); break;