| 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 | ␊ |
| 19 | static int rootuid = 10; //value means function wasnt ran yet␊ |
| 20 | ␊ |
| 21 | static 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; // _UID isnt present on ACPI data.␊ |
| 32 | }␊ |
| 33 | ␊ |
| 34 | static unsigned int findpciroot(unsigned char * dsdt,int len)␊ |
| 35 | {␊ |
| 36 | ␉int i;␊ |
| 37 | ␉␊ |
| 38 | ␉for (i=0; i<len-4; i++)␊ |
| 39 | ␉{␊ |
| 40 | ␉␉if(dsdt[i] == 'P' && dsdt[i+1] == 'C' && dsdt[i+2] == 'I' && (dsdt[i+3] == 0x08 || dsdt [i+4] == 0x08))␊ |
| 41 | ␉␉{␊ |
| 42 | ␉␉␉return findrootuid(dsdt+i, len-i);␊ |
| 43 | ␉␉}␊ |
| 44 | ␉}␊ |
| 45 | ␉return 10;␊ |
| 46 | }␊ |
| 47 | ␊ |
| 48 | int getPciRootUID(void)␊ |
| 49 | {␊ |
| 50 | ␉const char *val;␊ |
| 51 | ␉const char * dsdt_filename = NULL; //Azi:dsdt␊ |
| 52 | ␉int len, fd, fsize;␊ |
| 53 | ␉void *new_dsdt;␊ |
| 54 | ␉//Azi: warning: implicit declaration of function ‘search_and_get_acpi_fd’, if removed... hum... but works fine!␊ |
| 55 | ␉extern int search_and_get_acpi_fd(const char *, const char **);␊ |
| 56 | ␉␊ |
| 57 | ␉if (rootuid < 10) return rootuid;␊ |
| 58 | ␉␊ |
| 59 | ␉// If user supplied a key...␊ |
| 60 | ␉if (getValueForKey(kPciRootKey, &val, &len, &bootInfo->bootConfig))␊ |
| 61 | ␉{␊ |
| 62 | ␉␉if (isdigit(val[0]))␊ |
| 63 | ␉␉␉rootuid = val[0] - '0';␊ |
| 64 | ␉␉// ... use the value in it.␊ |
| 65 | ␉␉verbose("Using PCI-Root-UID value from PciRoot key: %d\n", rootuid);␊ |
| 66 | ␉␉goto out_out;␊ |
| 67 | ␉}␊ |
| 68 | ␉␊ |
| 69 | ␉// Search for a user supplied ACPI Table, to fetch the value from.␊ |
| 70 | ␉fd = search_and_get_acpi_fd("DSDT.aml", &dsdt_filename); //Azi:dsdt call 1␊ |
| 71 | ␉␊ |
| 72 | ␉// If no ACPI Table is supplied by user...␊ |
| 73 | ␉if (fd < 0)␊ |
| 74 | ␉{␊ |
| 75 | ␉␉verbose("No ACPI Table supplied by user.\n");␊ |
| 76 | ␉␉rootuid = 0; // default uid to 0.␊ |
| 77 | ␉␉goto out;␊ |
| 78 | ␉}␊ |
| 79 | ␉␊ |
| 80 | ␉// Found ACPI Table supplied by user, check size...␊ |
| 81 | ␉fsize = file_size(fd);␊ |
| 82 | ␉␊ |
| 83 | ␉// ... try to allocate memory...␊ |
| 84 | ␉if ((new_dsdt = malloc(fsize)) == NULL)␊ |
| 85 | ␉{␊ |
| 86 | ␉␉verbose("[ERROR] DSDT memory allocation failed.\n");␊ |
| 87 | ␉␉close (fd); // ... if allocation fails close file.␊ |
| 88 | ␉␉rootuid = 0; // Default uid to 0.␊ |
| 89 | ␉␉goto out;␊ |
| 90 | ␉}␊ |
| 91 | ␉␊ |
| 92 | ␉// Try to read file...␊ |
| 93 | ␉if (read(fd, new_dsdt, fsize) != fsize)␊ |
| 94 | ␉{␊ |
| 95 | ␉␉verbose("[ERROR] read %s failed.\n", dsdt_filename);␊ |
| 96 | ␉␉close (fd); // ... if reading fails close file.␊ |
| 97 | ␉␉rootuid = 0; // Default uid to 0.␊ |
| 98 | ␉␉goto out;␊ |
| 99 | ␉}␊ |
| 100 | ␉// else new_dsdt = supplied ACPI Table data.␊ |
| 101 | ␉close (fd); // Supplied Table can be closed.␊ |
| 102 | ␉␊ |
| 103 | ␉// Find value on supplied data.␊ |
| 104 | ␉rootuid = findpciroot(new_dsdt, fsize);␊ |
| 105 | ␉free(new_dsdt); // Free allocated data.␊ |
| 106 | ␉␊ |
| 107 | ␉// If _UID isn't present on ACPI data (value 11)...␊ |
| 108 | ␉if (rootuid < 0 || rootuid > 9) // ... it's negative or bigger than 9...␊ |
| 109 | ␉{␊ |
| 110 | ␉␉rootuid = 0; // ... default uid to 0.␊ |
| 111 | ␉}␊ |
| 112 | ␉else␊ |
| 113 | ␉␉printf("Found UID value on user supplied ACPI Table...\n");␊ |
| 114 | out:␊ |
| 115 | ␉verbose("Using PCI-Root-UID value: %d\n", rootuid);␊ |
| 116 | out_out:␊ |
| 117 | ␉return rootuid;␊ |
| 118 | }␊ |
| 119 | |
