diff options
Diffstat (limited to 'util/getpir/getpir.c')
| -rw-r--r-- | util/getpir/getpir.c | 142 |
1 files changed, 29 insertions, 113 deletions
diff --git a/util/getpir/getpir.c b/util/getpir/getpir.c index 110eef9645..5bcdd452a3 100644 --- a/util/getpir/getpir.c +++ b/util/getpir/getpir.c @@ -4,101 +4,50 @@ */ #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"); @@ -106,43 +55,10 @@ main() 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"); } |