39fdcbf9f0
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1646 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/* getpir.c : This software is released under GPL
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For Linuxbios use only
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Aug 26 2001 , Nikolai Vladychevski, <niko@isl.net.mx>
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*/
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#include <stdio.h>
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#include <sys/mman.h>
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#include <arch/pirq_routing.h>
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#define O_RDONLY 0x00
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static struct irq_routing_table *probe_table(int fd_mem)
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{
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char *ptr, signature[] = "$PIR";
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struct irq_routing_table *rt;
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ptr = mmap(0, 0x10000, PROT_READ, MAP_SHARED,
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fd_mem, (off_t) 0xf0000);
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rt = (struct irq_routing_table *) memmem(ptr, 0xFFFF, signature, 4);
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if (rt != NULL) {
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printf("Found PCI IRQ Routing table signature at 0x%04x of system memory\n",
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(char *) rt - ptr + 0xf0000);
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} else {
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printf("No PCI IRQ Routing table signature in the memory\n");
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exit(1);
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}
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return rt;
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}
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main()
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{
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int fd_mem;
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struct irq_routing_table *rt;
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if (getuid()) {
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perror("Run me as root, I need access to /dev/mem");
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exit(1);
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}
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fd_mem = open("/dev/mem", O_RDONLY);
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printf("Probing PIRQ table in memory\n");
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rt = probe_table(fd_mem);
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printf("Validating..\n");
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if (!calc_checksum(rt))
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printf("Checksum is ok!\n");
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printf("Creating irq_tables.c .....\n");
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code_gen("irq_tables.c", rt);
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close(fd_mem);
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printf("Done, you can move the file to the LinuxBios tree now.\n");
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}
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