mpc8313 PCI Init 初始化备忘

    u_boot
   
   PCI:
       
  pci_init_board->pci_hose_scan->pci_hose_scan_bus->
  pciauto_config_device->pciauto_setup_device
   
   
    data:
    volatile pciconf83xx_t *pci_conf;
    PCI_BASE_ADDRESS_0
   
    static struct pci_region pci_regions[] = {
    {
        bus_start: CFG_PCI1_MEM_BASE, //从这里分
        phys_start: CFG_PCI1_MEM_PHYS,
        size: CFG_PCI1_MEM_SIZE,
        flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
    },
    {
        bus_start: CFG_PCI1_MMIO_BASE,
        phys_start: CFG_PCI1_MMIO_PHYS,
        size: CFG_PCI1_MMIO_SIZE,
        flags: PCI_REGION_MEM
    },
    {
        bus_start: CFG_PCI1_IO_BASE,
        phys_start: CFG_PCI1_IO_PHYS,
        size: CFG_PCI1_IO_SIZE,
        flags: PCI_REGION_IO
    }
};
/*
 * General PCI
 * Addresses are mapped 1-1.
 */
#define CFG_PCI1_MEM_BASE    0x80000000
#define CFG_PCI1_MEM_PHYS    CFG_PCI1_MEM_BASE
#define CFG_PCI1_MEM_SIZE    0x10000000    /* 256M */
#define CFG_PCI1_MMIO_BASE    0x90000000
#define CFG_PCI1_MMIO_PHYS    CFG_PCI1_MMIO_BASE
#define CFG_PCI1_MMIO_SIZE    0x10000000    /* 256M */
#define CFG_PCI1_IO_BASE    0x00000000
#define CFG_PCI1_IO_PHYS    0xE2000000
#define CFG_PCI1_IO_SIZE    0x00100000    /* 1M */



KERNEL:
                                                                              
 pcibios_init->pci_scan_bus_parented->pci_scan_child_bus->pci_scan_bridge
->pci_scan_child_bus->pci_scan_slot->pci_scan_single_device
->pci_scan_device->pci_bus_read_config_dword

//////////////////
//get device addr
 pci_scan_single_device->pci_scan_device->pci_setup_device->pci_read_bases
   
   
   
  pci_assign_resource->pci_update_resource