| 1 | /*␊ |
| 2 | * Copyright 2009 netkas␊ |
| 3 | */␊ |
| 4 | ␊ |
| 5 | #include "config.h"␊ |
| 6 | #include "libsaio.h"␊ |
| 7 | #include "boot.h"␊ |
| 8 | #include "bootstruct.h"␊ |
| 9 | ␊ |
| 10 | #if DEBUG_PCIROOT␊ |
| 11 | ␉#define DBG(x...) printf(x)␊ |
| 12 | #else␊ |
| 13 | ␉#define DBG(x...)␊ |
| 14 | #endif␊ |
| 15 | ␊ |
| 16 | static int rootuid = 10; //value means function wasnt ran yet␊ |
| 17 | ␊ |
| 18 | static unsigned int findrootuid(unsigned char * dsdt, int len)␊ |
| 19 | {␊ |
| 20 | ␉int i;␊ |
| 21 | ␉for (i=0; i<64 && i<len-5; i++) //not far than 64 symbols from pci root ␊ |
| 22 | ␉{␊ |
| 23 | ␉␉if(dsdt[i] == '_' && dsdt[i+1] == 'U' && dsdt[i+2] == 'I' && dsdt[i+3] == 'D' && dsdt[i+5] == 0x08)␊ |
| 24 | ␉␉{␊ |
| 25 | ␉␉␉return dsdt[i+4];␊ |
| 26 | ␉␉}␊ |
| 27 | ␉}␊ |
| 28 | ␉return 11;␊ |
| 29 | }␊ |
| 30 | ␊ |
| 31 | static unsigned int findpciroot(unsigned char * dsdt,int len)␊ |
| 32 | {␊ |
| 33 | ␉int i;␊ |
| 34 | ␊ |
| 35 | ␉for (i=0; i<len-4; i++) {␊ |
| 36 | ␉␉if(dsdt[i] == 'P' && dsdt[i+1] == 'C' && dsdt[i+2] == 'I' && (dsdt[i+3] == 0x08 || dsdt [i+4] == 0x08)) {␊ |
| 37 | ␉␉␉return findrootuid(dsdt+i, len-i);␊ |
| 38 | ␉␉}␊ |
| 39 | ␉}␊ |
| 40 | ␉return 10;␊ |
| 41 | }␊ |
| 42 | ␊ |
| 43 | int getPciRootUID(void)␊ |
| 44 | {␊ |
| 45 | ␉char dsdt_dirSpec[128];␊ |
| 46 | ␊ |
| 47 | ␉void *new_dsdt;␊ |
| 48 | ␉const char *val;␊ |
| 49 | ␉int len, fsize;␊ |
| 50 | ␉const char * dsdt_filename = NULL;␊ |
| 51 | ␉extern int search_and_get_acpi_fd(const char *, const char **);␊ |
| 52 | ␊ |
| 53 | ␉if (rootuid < 10)␊ |
| 54 | ␉{␊ |
| 55 | ␉␉return rootuid;␊ |
| 56 | ␉}␊ |
| 57 | ␊ |
| 58 | ␉rootuid = 0;␉/* default uid = 0 */␊ |
| 59 | ␊ |
| 60 | ␉if (getValueForKey(kPCIRootUID, &val, &len, &bootInfo->chameleonConfig))␊ |
| 61 | ␉{␊ |
| 62 | ␉␉if (isdigit(val[0]))␊ |
| 63 | ␉␉{␊ |
| 64 | ␉␉␉rootuid = val[0] - '0';␊ |
| 65 | ␉␉}␊ |
| 66 | ␊ |
| 67 | ␉␉goto out;␊ |
| 68 | ␉}␊ |
| 69 | ␉/* Chameleon compatibility */␊ |
| 70 | ␉else if (getValueForKey("PciRoot", &val, &len, &bootInfo->chameleonConfig))␊ |
| 71 | ␉{␊ |
| 72 | ␉␉if (isdigit(val[0]))␊ |
| 73 | ␉␉{␊ |
| 74 | ␉␉␉rootuid = val[0] - '0';␊ |
| 75 | ␉␉}␊ |
| 76 | ␊ |
| 77 | ␉␉goto out;␊ |
| 78 | ␉}␊ |
| 79 | ␉/* PCEFI compatibility */␊ |
| 80 | ␉else if (getValueForKey("-pci0", &val, &len, &bootInfo->chameleonConfig))␊ |
| 81 | ␉{␊ |
| 82 | ␉␉rootuid = 0;␊ |
| 83 | ␉␉goto out;␊ |
| 84 | ␉}␊ |
| 85 | ␉else if (getValueForKey("-pci1", &val, &len, &bootInfo->chameleonConfig))␊ |
| 86 | ␉{␊ |
| 87 | ␉␉rootuid = 1;␊ |
| 88 | ␉␉goto out;␊ |
| 89 | ␉}␊ |
| 90 | ␊ |
| 91 | ␉// Try using the file specified with the DSDT option␊ |
| 92 | ␉if (getValueForKey(kDSDT, &dsdt_filename, &len, &bootInfo->chameleonConfig))␊ |
| 93 | ␉{␊ |
| 94 | ␉␉strncpy(dsdt_dirSpec, dsdt_filename, sizeof(dsdt_dirSpec) );␊ |
| 95 | ␉}␊ |
| 96 | ␉else␊ |
| 97 | ␉{␊ |
| 98 | ␉␉strcpy(dsdt_dirSpec, "DSDT.aml");␊ |
| 99 | ␉}␊ |
| 100 | ␊ |
| 101 | ␉int fd = search_and_get_acpi_fd(dsdt_dirSpec, &dsdt_filename);␊ |
| 102 | ␊ |
| 103 | ␉// Check booting partition␊ |
| 104 | ␉if (fd<0)␊ |
| 105 | ␉{␉ ␊ |
| 106 | ␉␉verbose("No DSDT found, using 0 as uid value.\n");␊ |
| 107 | ␉␉rootuid = 0;␊ |
| 108 | ␉␉goto out;␊ |
| 109 | ␉}␊ |
| 110 | ␊ |
| 111 | ␉fsize = file_size(fd);␊ |
| 112 | ␊ |
| 113 | ␉if (!(new_dsdt = malloc(fsize)))␊ |
| 114 | ␉{␊ |
| 115 | ␉␉verbose("[ERROR] alloc DSDT memory failed\n");␊ |
| 116 | ␉␉close (fd);␊ |
| 117 | ␉␉goto out;␊ |
| 118 | ␉}␊ |
| 119 | ␉if (read (fd, new_dsdt, fsize) != fsize)␊ |
| 120 | ␉{␊ |
| 121 | ␉␉verbose("[ERROR] read %s failed\n", dsdt_filename);␊ |
| 122 | ␉␉free(new_dsdt);␊ |
| 123 | ␉␉close (fd);␊ |
| 124 | ␉␉goto out;␊ |
| 125 | ␉}␊ |
| 126 | ␉close (fd);␊ |
| 127 | ␊ |
| 128 | ␉rootuid = findpciroot(new_dsdt, fsize);␊ |
| 129 | ␉free(new_dsdt);␊ |
| 130 | ␊ |
| 131 | ␉// make sure it really works: ␊ |
| 132 | ␉if (rootuid == 11)␊ |
| 133 | ␉{␊ |
| 134 | ␉␉rootuid=0; //usually when _UID isnt present, it means uid is zero␊ |
| 135 | ␉}␊ |
| 136 | ␉else if (rootuid < 0 || rootuid > 9) ␊ |
| 137 | ␉{␊ |
| 138 | ␉␉printf("PciRoot uid value wasnt found, using 0, if you want it to be 1, use -PciRootUID flag");␊ |
| 139 | ␉␉rootuid = 0;␊ |
| 140 | ␉}␊ |
| 141 | out:␊ |
| 142 | ␉verbose("Using PCI-Root-UID value: %d\n", rootuid);␊ |
| 143 | ␉return rootuid;␊ |
| 144 | }␊ |
| 145 | |
