*/
#include <stdio.h>
+#include <sys/mman.h>
-#include <device/pci.h>
#include <arch/pirq_routing.h>
-struct irq_info se_arr[50];
-struct irq_routing_table rt;
-unsigned short ts;
+#define O_RDONLY 0x00
-
-int calc_checksum()
+static struct irq_routing_table *probe_table(int fd_mem)
{
- long sum = 0, i, j;
- uint8_t *addr, sum2 = 0, data;
+ 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);
- addr = (uint8_t *) & rt;
- for (i = 0; i < sizeof(struct irq_routing_table); i++)
- sum2 += addr[i];
- for (i = 0; i < ts; i++) {
- addr = (uint8_t *) & se_arr[i];
- for (j = 0; j < sizeof(struct irq_info); j++)
- sum2 += addr[j];
+ 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 (sum2);
+ return rt;
}
main()
{
- FILE *fmem, *fpir;
- size_t rcount = 0;
- unsigned long b, p, pir = PIRQ_SIGNATURE;
- unsigned long count;
- int i, valid = 1, print = 0;
- char cksum = 0;
- unsigned char *ptr;
+ int fd_mem;
+ FILE *fpir;
+ 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("Opening memory...\n");
- fmem = fopen("/dev/mem", "r");
- do {
- rcount = fread(&b, 1, 4, fmem);
- if (rcount > 0) {
- if (b == pir) {
- valid = 1;
- printf("Found PCI IRQ Routing table signature at %x bytes from top of the memory\nValidating../\n",
- count);
- rt.signature = PIRQ_SIGNATURE;
- ptr = (char *) &rt;
- ptr = ptr + 4; // signature was read, advance 4 bytes
- rcount = fread(ptr, 1, sizeof(struct irq_routing_table) - 4, fmem);
- count = count + rcount;
- printf("Version is:%d Table size:%d\n",
- rt.version, rt.size);
- if (rt.version != PIRQ_VERSION) {
- printf("Invalid version\n");
- valid = 0;
- }
- if (rt.size < 32) {
- printf(" Invalid table size\n");
- valid = 0;
- }
- if (rt.size % 16) {
- printf(" Invalid table size (not a multiple of 16)\n");
- valid = 0;
- }
- if (valid) {
- // read slot entries
- ts = (rt.size - 32) / 16;
- printf("Reading %d slot entries...\n", ts);
- for (i = 0; i < ts; i++) {
- rcount =
- fread(&se_arr[i], 1, 16, fmem);
- count = count + rcount;
- }
- print = 1;
- break;
- }
- } else {
- count = count + rcount;
- }
- }
- } while (rcount > 0);
+ printf("Probing PIRQ table in memory\n");
+ rt = probe_table(fd_mem);
- if (!calc_checksum())
+ printf("Validating..\n");
+ if (!calc_checksum(rt))
printf("Checksum is ok!\n");
- printf("Closing memory\n");
- fclose(fmem);
-
- if (!print) {
- printf("No table for you...\n");
- return (0);
- }
printf("Creating irq_tables.c .....\n");
fpir = fopen("irq_tables.c", "w");
printf("Failed creating file!\n");
exit(2);
}
-
- fprintf(fpir, "/* This file was generated by getpir.c, do not modify! \n (but if you do, please run checkpir on it to verify)\n");
- fprintf(fpir, " Contains the IRQ Routing Table dumped directly from your memory , wich BIOS sets up\n\n");
- fprintf(fpir, " Documentation at : http://www.microsoft.com/hwdev/busbios/PCIIRQ.HTM\n*/\n\n");
- fprintf(fpir, "#include <arch/pirq_routing.h>\n\n");
- fprintf(fpir, "const struct irq_routing_table intel_irq_routing_table = {\n");
- fprintf(fpir, "\tPIRQ_SIGNATURE, /* u32 signature */\n");
- fprintf(fpir, "\tPIRQ_VERSION, /* u16 version */\n");
- fprintf(fpir, "\t32+16*%d, /* there can be total %d devices on the bus */\n",
- ts, ts);
- fprintf(fpir, "\t0x%02x, /* Where the interrupt router lies (bus) */\n",
- rt.rtr_bus);
- fprintf(fpir, "\t(0x%02x<<3)|0x%01x, /* Where the interrupt router lies (dev) */\n",
- rt.rtr_devfn >> 3, rt.rtr_devfn & 7);
- fprintf(fpir, "\t%#x, /* IRQs devoted exclusively to PCI usage */\n",
- rt.exclusive_irqs);
- fprintf(fpir, "\t%#x, /* Vendor */\n", rt.rtr_vendor);
- fprintf(fpir, "\t%#x, /* Device */\n", rt.rtr_device);
- fprintf(fpir, "\t%#x, /* Crap (miniport) */\n",
- rt.miniport_data);
- fprintf(fpir, "\t{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* u8 rfu[11] */\n");
- fprintf(fpir, "\t%#x, /* u8 checksum , this hase to set to some value that would give 0 after the sum of all bytes for this structure (including checksum) */\n",
- rt.checksum);
- fprintf(fpir, "\t{\n");
- fprintf(fpir, "\t\t/* bus, dev|fn, {link, bitmap}, {link, bitmap}, {link, bitmap}, {link, bitmap}, slot, rfu */\n");
- for (i = 0; i < ts; i++) {
- fprintf(fpir, "\t\t{0x%02x,(0x%02x<<3)|0x%01x, {{0x%02x, 0x%04x}, {0x%02x, 0x%04x}, {0x%02x, 0x%04x}, {0x%02x, 0x0%04x}}, 0x%x, 0x%x},\n",
- se_arr[i].bus, se_arr[i].devfn >> 3,
- se_arr[i].devfn & 7, se_arr[i].irq[0].link,
- se_arr[i].irq[0].bitmap, se_arr[i].irq[1].link,
- se_arr[i].irq[1].bitmap, se_arr[i].irq[2].link,
- se_arr[i].irq[2].bitmap, se_arr[i].irq[3].link,
- se_arr[i].irq[3].bitmap, se_arr[i].slot,
- se_arr[i].rfu);
- }
- fprintf(fpir, "\t}\n");
- fprintf(fpir, "};\n");
+ code_gen(fpir, rt);
fclose(fpir);
+
+ close(fd_mem);
+
printf("Done, you can move the file to the LinuxBios tree now.\n");
}
projects / coreboot.git / blobdiff