src/northbridge/amd/amdk8/reset_test.c

   1 #include <stdint.h>
   2 #include <cpu/x86/lapic.h>
   3 #define NODE_ID         0x60
   4 #define HT_INIT_CONTROL 0x6c
   5
   6 #define HTIC_ColdR_Detect  (1<<4)
   7 #define HTIC_BIOSR_Detect  (1<<5)
   8 #define HTIC_INIT_Detect   (1<<6)
   9
  10 static int cpu_init_detected(unsigned nodeid)
  11 {
  12         unsigned long htic;
  13         device_t dev;
  14
  15         dev = PCI_DEV(0, 0x18 + nodeid, 0);
  16         htic = pci_read_config32(dev, HT_INIT_CONTROL);
  17
  18         return !!(htic & HTIC_INIT_Detect);
  19 }
  20
  21 static int bios_reset_detected(void)
  22 {
  23         unsigned long htic;
  24         htic = pci_read_config32(PCI_DEV(0, 0x18, 0), HT_INIT_CONTROL);
  25
  26         return (htic & HTIC_ColdR_Detect) && !(htic & HTIC_BIOSR_Detect);
  27 }
  28
  29 static int cold_reset_detected(void)
  30 {
  31         unsigned long htic;
  32         htic = pci_read_config32(PCI_DEV(0, 0x18, 0), HT_INIT_CONTROL);
  33
  34         return !(htic & HTIC_ColdR_Detect);
  35 }
  36
  37 static void distinguish_cpu_resets(unsigned nodeid)
  38 {
  39         uint32_t htic;
  40         device_t device;
  41         device = PCI_DEV(0, 0x18 + nodeid, 0);
  42         htic = pci_read_config32(device, HT_INIT_CONTROL);
  43         htic |= HTIC_ColdR_Detect | HTIC_BIOSR_Detect | HTIC_INIT_Detect;
  44         pci_write_config32(device, HT_INIT_CONTROL, htic);
  45 }
  46
  47 static void set_bios_reset(void)
  48 {
  49         unsigned long htic;
  50         htic = pci_read_config32(PCI_DEV(0, 0x18, 0), HT_INIT_CONTROL);
  51         htic &= ~HTIC_BIOSR_Detect;
  52         pci_write_config32(PCI_DEV(0, 0x18, 0), HT_INIT_CONTROL, htic);
  53 }
  54
  55 static unsigned node_link_to_bus(unsigned node, unsigned link)
  56 {
  57         unsigned reg;
  58
  59         for(reg = 0xE0; reg < 0xF0; reg += 0x04) {
  60                 unsigned config_map;
  61                 config_map = pci_read_config32(PCI_DEV(0, 0x18, 1), reg);
  62                 if ((config_map & 3) != 3) {
  63                         continue;
  64                 }
  65                 if ((((config_map >> 4) & 7) == node) &&
  66                         (((config_map >> 8) & 3) == link))
  67                 {
  68                         return (config_map >> 16) & 0xff;
  69                 }
  70         }
  71         return 0;
  72 }
  73
  74 static unsigned get_sblk(void)
  75 {
  76         uint32_t reg;
  77         /* read PCI_DEV(0,0x18,0) 0x64 bit [8:9] to find out SbLink m */
  78         reg = pci_read_config32(PCI_DEV(0, 0x18, 0), 0x64);
  79         return ((reg>>8) & 3) ;
  80 }
  81
  82 static unsigned get_sbbusn(unsigned sblk)
  83 {
  84         return node_link_to_bus(0, sblk);
  85 }
  86
  87