| /** The folowing ACPI Table search algo. should be reused anywhere needed:*/␊ |
| int search_and_get_acpi_fd(const char * filename, const char ** outDirspec)␊ |
| {␊ |
| int fd=0;␊ |
| const char * overriden_pathname=NULL;␊ |
| static char dirspec[512]="";␊ |
| static bool first_time =true; ␊ |
| int len=0;␊ |
| int fd = 0;␊ |
| const char * override_name = NULL;␊ |
| static char dirspec[512] = "";␊ |
| int len = 0;␊ |
| ␊ |
| /// Take in accound user overriding if it's DSDT only␊ |
| if (strstr(filename, "DSDT") && ␊ |
| getValueForKey(kDSDT, &overriden_pathname, &len, ␊ |
| ␉␉␉ &bootInfo->bootConfig))␊ |
| {␊ |
| sprintf(dirspec, "%s", overriden_pathname);␊ |
| fd=open (dirspec,0);␊ |
| if (fd>=0) goto success_fd;␊ |
| }␊ |
| // Check that dirspec is not already assigned with a path␊ |
| if (!first_time && *dirspec) ␊ |
| { // it is so start searching this cached patch first␊ |
| //extract path␊ |
| for (len=strlen(dirspec)-1; len; len--)␊ |
| if (dirspec[len]=='/' || len==0)␊ |
| {␊ |
| dirspec[len]='\0';␊ |
| break;␊ |
| }␊ |
| // now concat with the filename␊ |
| strncat(dirspec, "/", sizeof(dirspec));␊ |
| strncat(dirspec, filename, sizeof(dirspec));␊ |
| // and test to see if we don't have our big boy here:␊ |
| fd=open (dirspec,0);␊ |
| if (fd>=0) ␊ |
| {␊ |
| // printf("ACPI file search cache hit: file found at %s\n", dirspec);␊ |
| goto success_fd;␊ |
| }␊ |
| // Try using the file specified with the DSDT option␊ |
| if (getValueForKey(kDSDT, &override_name, &len, &bootInfo->bootConfig))␊ |
| {␊ |
| sprintf(dirspec, "%s", override_name);␊ |
| fd = open(dirspec, 0);␊ |
| if (fd >= 0) goto success_fd;␊ |
| }␊ |
| // Start searching any potential location for ACPI Table␊ |
| // search the Extra folders first␊ |
| sprintf(dirspec,"/Extra/%s",filename); ␊ |
| fd=open (dirspec,0);␊ |
| if (fd>=0) goto success_fd;␊ |
| // Try finding 'filename' in the usual places␊ |
| else␊ |
| {␊ |
| // Start searching any potential location for ACPI Table␊ |
| // search the Extra folders first␊ |
| sprintf(dirspec, "/Extra/%s", filename); ␊ |
| fd = open(dirspec, 0);␊ |
| if (fd >= 0) goto success_fd;␊ |
| ␊ |
| sprintf(dirspec, "/%s", filename); // search root␊ |
| fd = open(dirspec, 0);␊ |
| if (fd >= 0) goto success_fd;␊ |
| ␊ |
| sprintf(dirspec,"bt(0,0)/Extra/%s",filename);␊ |
| fd=open (dirspec,0);␊ |
| if (fd>=0) goto success_fd;␊ |
| sprintf(dirspec, "bt(0,0)/Extra/%s", filename);␊ |
| fd = open(dirspec, 0);␊ |
| if (fd >= 0) goto success_fd;␊ |
| }␊ |
| ␊ |
| sprintf(dirspec, "%s", filename); // search current dir␊ |
| fd=open (dirspec,0);␊ |
| if (fd>=0) goto success_fd;␊ |
| ␊ |
| sprintf(dirspec, "/%s", filename); // search root␊ |
| fd=open (dirspec,0);␊ |
| if (fd>=0) goto success_fd;␊ |
| ␊ |
| // NOT FOUND:␊ |
| verbose("ACPI Table not found: %s\n", filename);␊ |
| verbose("ACPI Table not found\n");␊ |
| ␊ |
| if (outDirspec) *outDirspec = "";␊ |
| first_time = false;␊ |
| return -1;␊ |
| ␊ |
| // FOUND␊ |
| success_fd:␊ |
| first_time = false;␊ |
| if (outDirspec) *outDirspec = dirspec; ␊ |
| return fd;␊ |
| }␊ |
|
| ␉ close (fd);␊ |
| printf("Couldn't allocate memory for table \n", dirspec);␊ |
| ␉} ␊ |
| ␉printf("Couldn't find table %s\n", filename);␊ |
| ␉return NULL;␊ |
| }␊ |
| ␊ |
