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-rw-r--r--util/getpir/getpir.c53
1 files changed, 31 insertions, 22 deletions
diff --git a/util/getpir/getpir.c b/util/getpir/getpir.c
index d0ad978a40..6fc3a95d8a 100644
--- a/util/getpir/getpir.c
+++ b/util/getpir/getpir.c
@@ -28,31 +28,45 @@ static struct irq_routing_table *probe_table(int fd_mem)
{
char *ptr, signature[] = "$PIR";
struct irq_routing_table *rt;
+ int size = 16;
- ptr = mmap(0, 0x10000, PROT_READ, MAP_SHARED,
- fd_mem, (off_t) 0xf0000);
+ ptr = mmap(0, 0x10000, PROT_READ, MAP_SHARED,
+ fd_mem, (off_t) 0xf0000);
if (ptr == MAP_FAILED) {
perror("Mapping system memory failed: ");
- exit(1);
+ return NULL;
}
- 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 {
+ do {
+ rt = (struct irq_routing_table *) memmem(ptr + size, 16, signature, 4);
+ if (rt != NULL) {
+ printf("Found PCI IRQ routing table signature at %p.\n",
+ (void *) ((char *) rt - ptr + 0xf0000));
+ printf("Validating... ");
+ if (!calc_checksum(rt)) {
+ printf("checksum is ok.\n");
+ break;
+ } else {
+ printf("checksum is wrong.\n");
+ }
+ }
+ size += 16;
+ } while (size < 0xFFFF);
+
+ if (size >= 0xFFFF) {
printf("No PCI IRQ routing table signature found.\n");
- exit(1);
+ munmap(ptr, 0x10000);
+ return NULL;
}
+
return rt;
}
int main(void)
{
int fd_mem;
- struct irq_routing_table *rt;
+ struct irq_routing_table *rt;
if (getuid()) {
fprintf(stderr, "Run me as root, I need access to " MEM_DEV ".\n");
@@ -66,19 +80,14 @@ int main(void)
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);
-
+ if (rt != NULL) {
+ printf("Creating irq_tables.c ...\n");
+ code_gen("irq_tables.c", rt);
+ printf
+ ("Done, you can move the file to the coreboot tree now.\n");
+ }
close(fd_mem);
- printf("Done, you can move the file to the coreboot tree now.\n");
return 0;
}