| 30,7 → 30,9 |
|---|
| ; Description |
| ; entry point for system PCI calls |
| ;*************************************************************************** |
| ;mmio_pci_addr equ 0x400 ; set actual PCI address here to activate user-MMIO |
| |
| |
| align 4 |
| |
| pci_api: |
| 75,7 → 77,7 |
|---|
| jz pci_write_reg ;dword |
| |
| if defined mmio_pci_addr |
| cmp al,11 ; <<< user-level MMIO functions <<< NEW! |
| cmp al,11 ; user-level MMIO functions |
| jz pci_mmio_init |
| cmp al,12 |
| jz pci_mmio_map |
| 375,10 → 377,10 |
|---|
| dec eax |
| ret |
| |
| if defined mmio_pci_addr |
| if defined mmio_pci_addr ; must be set above |
| ;*************************************************************************** |
| ; Function |
| ; pci_mmio_init ; NEW! |
| ; pci_mmio_init |
| ; |
| ; Description |
| ; IN: bx = device's PCI bus address (bbbbbbbbdddddfff) |
| 389,7 → 391,7 |
|---|
| ; eax = -3 : user heap initialization failure |
| ;*************************************************************************** |
| pci_mmio_init: |
| cmp bx, mmio_pci_addr ; must be set in kernel/data32.inc |
| cmp bx, mmio_pci_addr |
| jz @f |
| mov eax,-2 |
| ret |
| 405,7 → 407,7 |
|---|
| |
| ;*************************************************************************** |
| ; Function |
| ; pci_mmio_map ; NEW! |
| ; pci_mmio_map |
| ; |
| ; Description |
| ; maps a block of PCI memory to user-accessible linear address |
| 491,7 → 493,7 |
|---|
| |
| ;*************************************************************************** |
| ; Function |
| ; pci_mmio_unmap_page ; NEW! |
| ; pci_mmio_unmap_page |
| ; |
| ; Description |
| ; unmaps the linear space previously tied to a PCI memory block |