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pci: Add PCI VGA helpers

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Allow devices to register VGA memory regions for handling PCI spec
defined VGA I/O port and MMIO areas.  PCI will attach these to the
bus address spaces and enable them according to the device command
register value.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Alex Williamson 2013-03-03 10:21:26 -07:00 • committed by Michael S. Tsirkin
parent a38b2c49bf
commit e01fd68718
2 changed files with 82 additions and 0 deletions
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21
hw/pci/pci.h
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@ -108,6 +108,20 @@ typedef struct PCIIORegion {
#define PCI_ROM_SLOT 6
#define PCI_NUM_REGIONS 7
enum {
QEMU_PCI_VGA_MEM,
QEMU_PCI_VGA_IO_LO,
QEMU_PCI_VGA_IO_HI,
QEMU_PCI_VGA_NUM_REGIONS,
};
#define QEMU_PCI_VGA_MEM_BASE 0xa0000
#define QEMU_PCI_VGA_MEM_SIZE 0x20000
#define QEMU_PCI_VGA_IO_LO_BASE 0x3b0
#define QEMU_PCI_VGA_IO_LO_SIZE 0xc
#define QEMU_PCI_VGA_IO_HI_BASE 0x3c0
#define QEMU_PCI_VGA_IO_HI_SIZE 0x20
#include "hw/pci/pci_regs.h"
/* PCI HEADER_TYPE */
@ -234,6 +248,10 @@ struct PCIDevice {
/* IRQ objects for the INTA-INTD pins. */
qemu_irq *irq;
/* Legacy PCI VGA regions */
MemoryRegion *vga_regions[QEMU_PCI_VGA_NUM_REGIONS];
bool has_vga;
/* Current IRQ levels. Used internally by the generic PCI code. */
uint8_t irq_state;
@ -287,6 +305,9 @@ struct PCIDevice {
void pci_register_bar(PCIDevice *pci_dev, int region_num,
uint8_t attr, MemoryRegion *memory);
void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem,
MemoryRegion *io_lo, MemoryRegion *io_hi);
void pci_unregister_vga(PCIDevice *pci_dev);
pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num);
int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,