nb/intel/x4x: Factor out hiding PCI devs in pure fn
This increases readability. Also change the update expression. '--variable' does not make much sense there. Change-Id: I64db2460115f5fb35ca197b83440f8ee47470761 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37291 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
parent
cd666d992d
commit
a854c9d787
|
@ -206,45 +206,30 @@ static void enable_dev(struct device *dev)
|
|||
dev->ops = &cpu_bus_ops;
|
||||
}
|
||||
|
||||
static void hide_pci_fn(const int dev_bit_base, const struct device *dev)
|
||||
{
|
||||
if (!dev || dev->enabled)
|
||||
return;
|
||||
const unsigned int fn = PCI_FUNC(dev->path.pci.devfn);
|
||||
const struct device *const d0f0 = pcidev_on_root(0, 0);
|
||||
pci_update_config32(d0f0, D0F0_DEVEN, ~(1 << (dev_bit_base + fn)), 0);
|
||||
}
|
||||
|
||||
static void hide_pci_dev(const int dev, int functions, const int dev_bit_base)
|
||||
{
|
||||
for (; functions >= 0; functions--)
|
||||
hide_pci_fn(dev_bit_base, pcidev_on_root(dev, functions));
|
||||
}
|
||||
|
||||
static void x4x_init(void *const chip_info)
|
||||
{
|
||||
int dev, fn, bit_base;
|
||||
|
||||
struct device *const d0f0 = pcidev_on_root(0x0, 0);
|
||||
|
||||
/* Hide internal functions based on devicetree info. */
|
||||
for (dev = 6; dev > 0; --dev) {
|
||||
switch (dev) {
|
||||
case 6: /* PEG1: only on P45 */
|
||||
fn = 0;
|
||||
bit_base = 13;
|
||||
break;
|
||||
case 3: /* ME */
|
||||
fn = 3;
|
||||
bit_base = 6;
|
||||
break;
|
||||
case 2: /* IGD */
|
||||
fn = 1;
|
||||
bit_base = 3;
|
||||
break;
|
||||
case 1: /* PEG0 */
|
||||
fn = 0;
|
||||
bit_base = 1;
|
||||
break;
|
||||
case 4: /* Nothing to do */
|
||||
case 5:
|
||||
continue;
|
||||
}
|
||||
for (; fn >= 0; --fn) {
|
||||
const struct device *const d =
|
||||
pcidev_on_root(dev, fn);
|
||||
if (!d || d->enabled)
|
||||
continue;
|
||||
const u32 deven = pci_read_config32(d0f0, D0F0_DEVEN);
|
||||
pci_write_config32(d0f0, D0F0_DEVEN,
|
||||
deven & ~(1 << (bit_base + fn)));
|
||||
}
|
||||
}
|
||||
hide_pci_dev(6, 0, 13); /* PEG1: only on P45 */
|
||||
hide_pci_dev(3, 3, 6); /* ME */
|
||||
hide_pci_dev(2, 1, 3); /* IGD */
|
||||
hide_pci_dev(1, 0, 1); /* PEG0 */
|
||||
|
||||
const u32 deven = pci_read_config32(d0f0, D0F0_DEVEN);
|
||||
if (!(deven & (0xf << 6)))
|
||||
|
|
Loading…
Reference in New Issue