; PCI Bus defines
PCI_HEADER_TYPE equ 0x0e ;8 bit
PCI_BASE_ADDRESS_0 equ 0x10 ;32 bit
PCI_BASE_ADDRESS_5 equ 0x24 ;32 bits
PCI_BASE_ADDRESS_SPACE_IO equ 0x01
PCI_VENDOR_ID equ 0x00 ;16 bit
PCI_BASE_ADDRESS_IO_MASK equ 0xFFFFFFFC
; PCI programming
PCI_REG_COMMAND equ 0x4 ; command register
PCI_REG_STATUS equ 0x6 ; status register
PCI_REG_LATENCY equ 0xd ; latency timer register
PCI_REG_CAP_PTR equ 0x34 ; capabilities pointer
PCI_REG_CAPABILITY_ID equ 0x0 ; capapility ID in pm register block
PCI_REG_PM_STATUS equ 0x4 ; power management status register
PCI_REG_PM_CTRL equ 0x4 ; power management control register
PCI_BIT_PIO equ 1 ; bit0: io space control
PCI_BIT_MMIO equ 2 ; bit1: memory space control
PCI_BIT_MASTER equ 4 ; bit2: device acts as a PCI master
; Kernel variables
PAGESIZE equ 4096
PG_SW equ 0x003
; network driver types
NET_TYPE_ETH equ 1
NET_TYPE_SLIP equ 2
LAST_IO = 0
macro set_io addr {
if addr = 0
mov edx, [device.io_addr]
else if addr = LAST_IO
else
add edx, addr - LAST_IO
end if
LAST_IO = addr
}
macro allocate_and_clear dest, size, err {
; We need to allocate at least 8 pages, if we want a continuous memory in ram
push edx
if (size < 8*4096) & (size > 4096)
stdcall KernelAlloc, 8*4096
else
stdcall KernelAlloc, size
end if
pop edx
test eax, eax
jz err
mov dest, eax ; Save the address to it into the device struct
mov edi, eax ; look at last part of code!
; Release the unused pages (if any)
if (size < 8*4096) & (size > 4096)
add eax, (size/4096+1)*4096
mov ecx, 8-(size/4096+1)
push edx
call ReleasePages
pop edx
end if
; Clear the allocated buffer
mov ecx, size/4 ; divide by 4 because of DWORD
xor eax, eax
rep stosd
}
macro find_io bus, dev, io {
local .check, .inc, .got
xor eax, eax
mov esi, PCI_BASE_ADDRESS_0
movzx ecx, bus
movzx edx, dev
.check:
stdcall PciRead32, ecx ,edx ,esi
test eax, PCI_BASE_ADDRESS_IO_MASK
jz .inc
test eax, PCI_BASE_ADDRESS_SPACE_IO
jz .inc
and eax, PCI_BASE_ADDRESS_IO_MASK
mov io , eax
jmp .got
.inc:
add esi, 4
cmp esi, PCI_BASE_ADDRESS_5
jle .check
.got:
}
macro find_irq bus, dev, irq {
push eax edx ecx
movzx ecx, bus
movzx edx, dev
stdcall PciRead8, ecx ,edx ,0x3c ; 0x3c is the offset where irq can be found
mov irq, al
pop ecx edx eax
}
macro find_rev bus, dev, rev {
push eax edx ecx
movzx ecx, bus
movzx edx, dev
stdcall PciRead8, ecx ,edx ,0x8
mov rev, al
pop ecx edx eax
}
macro make_bus_master bus, dev {
movzx ecx, bus
movzx edx, dev
stdcall PciRead32, ecx ,edx, PCI_REG_COMMAND
or al, PCI_BIT_MASTER ;or PCI_BIT_PIO
; and al, not PCI_BIT_MMIO
stdcall PciWrite32, ecx, edx, PCI_REG_COMMAND, eax
;; TODO: try to switch to PIO, and check if PIO works or not..
}
struc IOCTL {
.handle dd ?
.io_code dd ?
.input dd ?
.inp_size dd ?
.output dd ?
.out_size dd ?
}
virtual at edx
IOCTL IOCTL
end virtual
if used null_op
align 4
null_op:
or eax, -1
ret
end if
macro GetRealAddr { ; input and output is eax
push ax
call GetPgAddr
and word[esp], PAGESIZE - 1
or ax, word[esp]
inc esp
inc esp
}
macro NET_DEVICE {
.type dd ? ; Type field
.mtu dd ? ; Maximal Transmission Unit
.name dd ? ; Ptr to 0 terminated string
.unload dd ? ; Ptrs to driver functions
.reset dd ? ;
.transmit dd ? ;
.bytes_tx dq ? ; Statistics, updated by the driver
.bytes_rx dq ? ;
.packets_tx dd ? ;
.packets_rx dd ? ;
.end:
}
macro ETH_DEVICE {
NET_DEVICE
.set_mode dd ?
.get_mode dd ?
.set_MAC dd ?
.get_MAC dd ?
.mode dd ?
.mac dp ?
dp ? ; qword alignment
}
macro SLIP_DEVICE {
NET_DEVICE
.set_mode dd ?
.get_mode dd ?
.mode dd ?
}