x86: pci: Allow configuration before relocation
Add simple PCI access routines for x86 which permit use before relocation. The normal PCI stack is still used, but for pre-relocation use there can only ever be a single hose. After relocation, fall back to the normal access, although even then on x86 machines there is normally only a single PCI bus. Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
parent
6e5b12b614
commit
6fb3b72e87
|
@ -46,3 +46,53 @@ void pci_init_board(void)
|
||||||
|
|
||||||
hose->last_busno = pci_hose_scan(hose);
|
hose->last_busno = pci_hose_scan(hose);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static struct pci_controller *get_hose(void)
|
||||||
|
{
|
||||||
|
if (gd->arch.hose)
|
||||||
|
return gd->arch.hose;
|
||||||
|
|
||||||
|
return pci_bus_to_hose(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
unsigned int pci_read_config8(pci_dev_t dev, unsigned where)
|
||||||
|
{
|
||||||
|
uint8_t value;
|
||||||
|
|
||||||
|
pci_hose_read_config_byte(get_hose(), dev, where, &value);
|
||||||
|
|
||||||
|
return value;
|
||||||
|
}
|
||||||
|
|
||||||
|
unsigned int pci_read_config16(pci_dev_t dev, unsigned where)
|
||||||
|
{
|
||||||
|
uint16_t value;
|
||||||
|
|
||||||
|
pci_hose_read_config_word(get_hose(), dev, where, &value);
|
||||||
|
|
||||||
|
return value;
|
||||||
|
}
|
||||||
|
|
||||||
|
unsigned int pci_read_config32(pci_dev_t dev, unsigned where)
|
||||||
|
{
|
||||||
|
uint32_t value;
|
||||||
|
|
||||||
|
pci_hose_read_config_dword(get_hose(), dev, where, &value);
|
||||||
|
|
||||||
|
return value;
|
||||||
|
}
|
||||||
|
|
||||||
|
void pci_write_config8(pci_dev_t dev, unsigned where, unsigned value)
|
||||||
|
{
|
||||||
|
pci_hose_write_config_byte(get_hose(), dev, where, value);
|
||||||
|
}
|
||||||
|
|
||||||
|
void pci_write_config16(pci_dev_t dev, unsigned where, unsigned value)
|
||||||
|
{
|
||||||
|
pci_hose_write_config_word(get_hose(), dev, where, value);
|
||||||
|
}
|
||||||
|
|
||||||
|
void pci_write_config32(pci_dev_t dev, unsigned where, unsigned value)
|
||||||
|
{
|
||||||
|
pci_hose_write_config_dword(get_hose(), dev, where, value);
|
||||||
|
}
|
||||||
|
|
|
@ -33,4 +33,17 @@ void board_pci_setup_hose(struct pci_controller *hose);
|
||||||
* later use, but will become invalid one DRAM is available.
|
* later use, but will become invalid one DRAM is available.
|
||||||
*/
|
*/
|
||||||
int pci_early_init_hose(struct pci_controller **hosep);
|
int pci_early_init_hose(struct pci_controller **hosep);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Simple PCI access routines - these work from either the early PCI hose
|
||||||
|
* or the 'real' one, created after U-Boot has memory available
|
||||||
|
*/
|
||||||
|
unsigned int pci_read_config8(pci_dev_t dev, unsigned where);
|
||||||
|
unsigned int pci_read_config16(pci_dev_t dev, unsigned where);
|
||||||
|
unsigned int pci_read_config32(pci_dev_t dev, unsigned where);
|
||||||
|
|
||||||
|
void pci_write_config8(pci_dev_t dev, unsigned where, unsigned value);
|
||||||
|
void pci_write_config16(pci_dev_t dev, unsigned where, unsigned value);
|
||||||
|
void pci_write_config32(pci_dev_t dev, unsigned where, unsigned value);
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
|
Loading…
Reference in New Issue