amd64/bareMetalOS-0.5.2/baremetal0.5.2/os/drivers/net/bcm57xx.asm

   1 ; =============================================================================
   2 ; BareMetal -- a 64-bit OS written in Assembly for x86-64 systems
   3 ; Copyright (C) 2008-2011 Return Infinity -- see LICENSE.TXT
   4 ;
   5 ; Broadcom 57XX NIC.
   6 ; =============================================================================
   7
   8 align 16
   9 db 'DEBUG: BCM57xx  '
  10 align 16
  11
  12
  13 ; -----------------------------------------------------------------------------
  14 ; os_net_bcm57xx_init - Initialize a Broadcom 57XX NIC
  15 ;  IN:  AL  = Bus number of the Realtek device
  16 ;       BL  = Device/Slot number of the Realtek device
  17 os_net_bcm57xx_init:
  18         push rsi
  19         push rdx
  20         push rcx
  21         push rax
  22
  23         ; Grab the Base I/O Address of the device
  24         push ax
  25         mov cl, 0x04                            ; BAR0 - Lower 32 bits of memory address
  26         call os_pci_read_reg
  27 ;       mov dword [os_NetIOAddress], eax
  28         pop ax
  29
  30         ; Grab the IRQ of the device
  31         mov cl, 0x0F                            ; Get device's IRQ number from PCI Register 15 (IRQ is bits 7-0)
  32         call os_pci_read_reg
  33         mov [os_NetIRQ], al                     ; AL holds the IRQ
  34
  35         ; Grab the MAC address
  36         mov rsi, [os_NetIOBaseMem]
  37         mov eax, [rsi+0x410]                            ; Mac_Address_0 Part 1
  38         ror eax, 8
  39         mov [os_NetMAC], al
  40         rol eax, 8
  41         mov [os_NetMAC+1], al
  42         mov eax, [rsi+0x414]                            ; Mac_Address_0 Part 2
  43         rol eax, 8
  44         mov [os_NetMAC+2], al
  45         rol eax, 8
  46         mov [os_NetMAC+3], al
  47         rol eax, 8
  48         mov [os_NetMAC+4], al
  49         rol eax, 8
  50         mov [os_NetMAC+5], al
  51
  52         ; Enable the Network IRQ in the PIC
  53         ; IRQ value 0-7 set to zero bit 0-7 in 0x21 and value 8-15 set to zero bit 0-7 in 0xa1
  54         in al, 0x21                             ; low byte target 0x21
  55         mov bl, al
  56         mov al, [os_NetIRQ]
  57         mov dx, 0x21                            ; Use the low byte pic
  58         cmp al, 8
  59         jl os_net_bcm57xx_init_low
  60         sub al, 8                               ; IRQ 8-16
  61         push ax
  62         in al, 0xA1                             ; High byte target 0xA1
  63         mov bl, al
  64         pop ax
  65         mov dx, 0xA1                            ; Use the high byte pic
  66 os_net_bcm57xx_init_low:
  67         mov cl, al
  68         mov al, 1
  69         shl al, cl
  70         not al
  71         and al, bl
  72         out dx, al
  73
  74         ; Reset the device
  75         call os_net_bcm57xx_reset
  76
  77         pop rax
  78         pop rcx
  79         pop rdx
  80         pop rsi
  81         ret
  82 ; -----------------------------------------------------------------------------
  83
  84
  85 ; -----------------------------------------------------------------------------
  86 ; os_net_bcm57xx_reset - Reset a Broadcom 57XX NIC
  87 ;  IN:  Nothing
  88 ; OUT:  Nothing, all registers preserved
  89 os_net_bcm57xx_reset:
  90
  91         ret
  92 ; -----------------------------------------------------------------------------
  93
  94
  95 ; -----------------------------------------------------------------------------
  96 ; os_net_bcm57xx_transmit - Transmit a packet via a Broadcom 57XX NIC
  97 ;  IN:  RSI = Location of packet
  98 ;       RCX = Length of packet
  99 ; OUT:  Nothing
 100 ;       Uses RAX, RCX, RDX, RSI, RDI
 101 ; ToDo: Check for proper timeout instead of calling os_delay
 102 os_net_bcm57xx_transmit:
 103
 104         ret
 105 ; -----------------------------------------------------------------------------
 106
 107
 108 ; -----------------------------------------------------------------------------
 109 ; os_net_bcm57xx_poll - Polls the Broadcom 57XX NIC for a received packet
 110 ;  IN:  RDI = Location to store packet
 111 ; OUT:  RCX = Length of packet
 112 ;       Uses RAX, RCX, RDX, RSI, RDI
 113 os_net_bcm57xx_poll:
 114
 115 os_net_bcm57xx_ack_int:
 116
 117         ret
 118 ; -----------------------------------------------------------------------------
 119
 120
 121 ; =============================================================================
 122 ; EOF