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Root/branches/meklort/i386/libsaio/pci_root.c

Source at commit 534 created 13 years 7 months ago.
By meklort, ACPI Pather is now a module. untested.
1/*␊
2 * Copyright 2009 netkas␊
3 */␊
4␊
5#include "libsaio.h"␊
6#include "boot.h"␊
7#include "bootstruct.h"␊
8␊
9#ifndef DEBUG_PCIROOT␊
10#define DEBUG_PCIROOT 1␊
11#endif␊
12␊
13#if DEBUG_PCIROOT␊
14#define DBG(x...) printf(x)␊
15#else␊
16#define DBG(x...)␊
17#endif␊
18␊
19static int rootuid = 10; //value means function wasnt ran yet␊
20␊
21static unsigned int findrootuid(unsigned char * dsdt, int len)␊
22{␊
23␉int i;␊
24␉for (i=0; i<64 && i<len-5; i++) //not far than 64 symbols from pci root ␊
25␉{␊
26␉␉if(dsdt[i] == '_' && dsdt[i+1] == 'U' && dsdt[i+2] == 'I' && dsdt[i+3] == 'D' && dsdt[i+5] == 0x08)␊
27␉␉{␊
28␉␉␉return dsdt[i+4];␊
29␉␉}␊
30␉}␊
31␉return 11;␊
32}␊
33␊
34unsigned int findpciroot(unsigned char * dsdt,int len)␊
35{␊
36␉int i;␊
37␊
38␉for (i=0; i<len-4; i++) {␊
39␉␉if(dsdt[i] == 'P' && dsdt[i+1] == 'C' && dsdt[i+2] == 'I' && (dsdt[i+3] == 0x08 || dsdt [i+4] == 0x08)) {␊
40␉␉␉return findrootuid(dsdt+i, len-i);␊
41␉␉}␊
42␉}␊
43␉return 10;␊
44}␊
45␊
46int getPciRootUID(void)␊
47{␊
48␉const char *val;␊
49␉int len;␊
50␉extern int search_and_get_acpi_fd(const char *, const char **);␊
51␊
52␉if (rootuid < 10) return rootuid;␊
53␉rootuid = 0;␉/* default uid = 0 */␊
54␊
55␉if (getValueForKey(kPCIRootUID, &val, &len, &bootInfo->bootConfig)) {␊
56␉␉if (isdigit(val[0])) rootuid = val[0] - '0';␊
57␉}␊
58␉/* Chameleon compatibility */␊
59␉else if (getValueForKey("PciRoot", &val, &len, &bootInfo->bootConfig)) {␊
60␉␉if (isdigit(val[0])) rootuid = val[0] - '0';␊
61␉}␊
62␉/* PCEFI compatibility */␊
63␉else if (getValueForKey("-pci0", &val, &len, &bootInfo->bootConfig)) {␊
64␉␉rootuid = 0;␊
65␉}␊
66␉else if (getValueForKey("-pci1", &val, &len, &bootInfo->bootConfig)) {␊
67␉␉rootuid = 1;␊
68␉}␊
69␊
70␉verbose("Using PCI-Root-UID value: %d\n", rootuid);␊
71␉return rootuid;␊
72}␊
73

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