| /* getpir.c : This software is released under GPL |
| * For LinuxBIOS use only |
| * Aug 26 2001 , Nikolai Vladychevski, <niko@isl.net.mx> |
| * 2007.04.09 Jeremy Jackson <jerj@coplanar.net> |
| * updated for amd64 and general 64 bit portability |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <sys/mman.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| |
| #include "pirq_routing.h" |
| #include "checksum.h" |
| #include "code_gen.h" |
| |
| #if defined (__sun) && (defined(__i386) || defined(__amd64)) |
| # define MEM_DEV "/dev/xsvc" |
| #else |
| # define MEM_DEV "/dev/mem" |
| #endif |
| |
| static struct irq_routing_table *probe_table(int fd_mem) |
| { |
| char *ptr, signature[] = "$PIR"; |
| struct irq_routing_table *rt; |
| |
| ptr = mmap(0, 0x10000, PROT_READ, MAP_SHARED, |
| fd_mem, (off_t) 0xf0000); |
| |
| if (ptr == MAP_FAILED) { |
| perror("Mapping system memory failed: "); |
| exit(1); |
| } |
| |
| rt = (struct irq_routing_table *) memmem(ptr, 0xFFFF, signature, 4); |
| |
| if (rt != NULL) { |
| printf("Found PCI IRQ routing table signature at %p.\n", |
| (void *)((char *)rt - ptr + 0xf0000)); |
| } else { |
| printf("No PCI IRQ routing table signature found.\n"); |
| exit(1); |
| } |
| return rt; |
| } |
| |
| int main(void) |
| { |
| int fd_mem; |
| struct irq_routing_table *rt; |
| |
| if (getuid()) { |
| fprintf(stderr, "Run me as root, I need access to " MEM_DEV ".\n"); |
| } |
| |
| fd_mem = open(MEM_DEV, O_RDONLY); |
| if (fd_mem < 0) { |
| perror("Could not open " MEM_DEV ":"); |
| exit(1); |
| } |
| |
| printf("Probing PIRQ table in memory.\n"); |
| rt = probe_table(fd_mem); |
| |
| printf("Validating... "); |
| if (!calc_checksum(rt)) |
| printf("checksum is ok.\n"); |
| else |
| printf("checksum is wrong.\n"); |
| |
| printf("Creating irq_tables.c ...\n"); |
| code_gen("irq_tables.c", rt); |
| |
| close(fd_mem); |
| |
| printf("Done, you can move the file to the LinuxBIOS tree now.\n"); |
| |
| return 0; |
| } |