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/* getpir.c : This software is released under GPL
For Linuxbios use only
Aug 26 2001 , Nikolai Vladychevski, <niko@isl.net.mx>
*/
#include <stdio.h>
#include <sys/mman.h>
#include <arch/pirq_routing.h>
#define O_RDONLY 0x00
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);
rt = (struct irq_routing_table *) memmem(ptr, 0xFFFF, signature, 4);
if (rt != NULL) {
printf("Found PCI IRQ Routing table signature at 0x%04x of system memory\n",
(char *) rt - ptr + 0xf0000);
} else {
printf("No PCI IRQ Routing table signature in the memory\n");
exit(1);
}
return rt;
}
main()
{
int fd_mem;
struct irq_routing_table *rt;
if (getuid()) {
perror("Run me as root, I need access to /dev/mem");
exit(1);
}
fd_mem = open("/dev/mem", O_RDONLY);
printf("Probing PIRQ table in memory\n");
rt = probe_table(fd_mem);
printf("Validating..\n");
if (!calc_checksum(rt))
printf("Checksum is ok!\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");
}
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