src/arch/i386/boot/pirq_routing.c

   1 #include <console/console.h>
   2 #include <arch/pirq_routing.h>
   3 #include <string.h>
   4
   5 #ifdef DEBUG
   6 void check_pirq_routing_table(void)
   7 {
   8         const uint8_t *addr;
   9         const struct irq_routing_table *rt;
  10         int i;
  11         uint8_t sum;
  12
  13         printk_info("Checking IRQ routing tables...\n");
  14
  15 #if defined(IRQ_SLOT_COUNT)
  16         if (sizeof(intel_irq_routing_table) != intel_irq_routing_table.size) {
  17                 printk_warning("Inconsistent IRQ routing table size\n");
  18         }
  19 #endif
  20
  21         rt = &intel_irq_routing_table;
  22         addr = (uint8_t *)rt;
  23
  24         sum = 0;
  25         for (i = 0; i < rt->size; i++)
  26                 sum += addr[i];
  27
  28         printk_debug("%s:%6d:%s() - irq_routing_table located at: 0x%p\n",
  29             __FILE__, __LINE__, __FUNCTION__, addr);
  30
  31
  32         sum = rt->checksum - sum;
  33
  34         if (sum != rt->checksum) {
  35                 printk_warning("%s:%6d:%s() - "
  36                        "checksum is: 0x%02x but should be: 0x%02x\n",
  37                        __FILE__, __LINE__, __FUNCTION__, rt->checksum, sum);
  38         }
  39
  40         if (rt->signature != PIRQ_SIGNATURE || rt->version != PIRQ_VERSION ||
  41             rt->size % 16 || rt->size < sizeof(struct irq_routing_table)) {
  42                 printk_warning("%s:%6d:%s() - "
  43                        "Interrupt Routing Table not valid\n",
  44                        __FILE__, __LINE__, __FUNCTION__);
  45                 return;
  46         }
  47
  48         sum = 0;
  49         for (i=0; i<rt->size; i++)
  50                 sum += addr[i];
  51
  52         if (sum) {
  53                 printk_warning("%s:%6d:%s() - "
  54                        "checksum error in irq routing table\n",
  55                        __FILE__, __LINE__, __FUNCTION__);
  56         }
  57
  58         printk_info("done.\n");
  59 }
  60
  61 int verify_copy_pirq_routing_table(unsigned long addr)
  62 {
  63         int i;
  64         uint8_t *rt_orig, *rt_curr;
  65
  66         rt_curr = (uint8_t*)addr;
  67         rt_orig = (uint8_t*)&intel_irq_routing_table;
  68         printk_info("Verifing priq routing tables copy at 0x%x...", addr);
  69         for (i = 0; i < intel_irq_routing_table.size; i++) {
  70                 if (*(rt_curr + i) != *(rt_orig + i)) {
  71                         printk_info("failed\n");
  72                         return -1;
  73                 }
  74         }
  75         printk_info("succeed\n");
  76         return 0;
  77 }
  78 #else
  79 #define verify_copy_pirq_routing_table(addr)
  80 #endif
  81
  82 unsigned long copy_pirq_routing_table(unsigned long addr)
  83 {
  84         /* Align the table to be 16 byte aligned. */
  85         addr += 15;
  86         addr &= ~15;
  87
  88         /* This table must be betweeen 0xf0000 & 0x100000 */
  89         printk_info("Copying IRQ routing tables to 0x%x...", addr);
  90         memcpy((void *)addr, &intel_irq_routing_table, intel_irq_routing_table.size);
  91         printk_info("done.\n");
  92         verify_copy_pirq_routing_table(addr);
  93         return addr + intel_irq_routing_table.size;
  94 }