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Root/tags/2.0/i386/libsaio/pci_root.c

Source at commit 1793 created 12 years 5 months ago.
By blackosx, Attempt to overcome issue 211 by revising the code to remove all package .svn files before function makeSubstitutions() is called. The line it replaces should work but I can't figure out why it doesn't...
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␊
34static unsigned 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␉char dsdt_dirSpec[128];␊
49␊
50␉void *new_dsdt;␊
51␉const char *val;␊
52␉int len,fsize;␊
53␉const char * dsdt_filename=NULL;␊
54␉extern int search_and_get_acpi_fd(const char *, const char **);␊
55␊
56␉if (rootuid < 10) return rootuid;␊
57␉rootuid = 0;␉/* default uid = 0 */␊
58␊
59␉if (getValueForKey(kPCIRootUID, &val, &len, &bootInfo->chameleonConfig)) {␊
60␉␉if (isdigit(val[0])) rootuid = val[0] - '0';␊
61␉␉goto out;␊
62␉}␊
63␉/* Chameleon compatibility */␊
64␉else if (getValueForKey("PciRoot", &val, &len, &bootInfo->chameleonConfig)) {␊
65␉␉if (isdigit(val[0])) rootuid = val[0] - '0';␊
66␉␉goto out;␊
67␉}␊
68␉/* PCEFI compatibility */␊
69␉else if (getValueForKey("-pci0", &val, &len, &bootInfo->chameleonConfig)) {␊
70␉␉rootuid = 0;␊
71␉␉goto out;␊
72␉}␊
73␉else if (getValueForKey("-pci1", &val, &len, &bootInfo->chameleonConfig)) {␊
74␉␉rootuid = 1;␊
75␉␉goto out;␊
76␉}␊
77␊
78␉␊
79␉// Try using the file specified with the DSDT option␊
80␉if (getValueForKey(kDSDT, &dsdt_filename, &len, &bootInfo->chameleonConfig))␊
81␉{␊
82␉␉sprintf(dsdt_dirSpec, dsdt_filename);␊
83␉}␊
84␉else␊
85␉{␊
86␉␉sprintf(dsdt_dirSpec, "DSDT.aml");␊
87␉}␊
88␉␊
89␉int fd = search_and_get_acpi_fd(dsdt_dirSpec, &dsdt_filename);␊
90␊
91␉// Check booting partition␊
92␉if (fd<0)␊
93␉{␉ ␊
94␉ verbose("No DSDT found, using 0 as uid value.\n");␊
95␉ rootuid = 0;␊
96␉ goto out;␊
97␉}␊
98␉␊
99␉fsize = file_size(fd);␊
100␊
101␉if ((new_dsdt = malloc(fsize)) == NULL) {␊
102␉␉verbose("[ERROR] alloc DSDT memory failed\n");␊
103␉␉close (fd);␊
104␉␉goto out;␊
105␉}␊
106␉if (read (fd, new_dsdt, fsize) != fsize) {␊
107␉␉verbose("[ERROR] read %s failed\n", dsdt_filename);␊
108␉␉close (fd);␊
109␉␉goto out;␊
110␉}␊
111␉close (fd);␊
112␊
113␉rootuid = findpciroot(new_dsdt, fsize);␊
114␉free(new_dsdt);␊
115␊
116␉// make sure it really works: ␊
117␉if (rootuid == 11) rootuid=0; //usually when _UID isnt present, it means uid is zero␊
118␉else if (rootuid < 0 || rootuid > 9) ␊
119␉{␊
120␉␉printf("PciRoot uid value wasnt found, using 0, if you want it to be 1, use -PciRootUID flag");␊
121␉␉rootuid = 0;␊
122␉}␊
123out:␊
124␉verbose("Using PCI-Root-UID value: %d\n", rootuid);␊
125␉return rootuid;␊
126}␊
127

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