diff options
Diffstat (limited to 'src/soc/intel/common/block/pcie/pcie_helpers.c')
-rw-r--r-- | src/soc/intel/common/block/pcie/pcie_helpers.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/pcie/pcie_helpers.c b/src/soc/intel/common/block/pcie/pcie_helpers.c new file mode 100644 index 0000000000..31451d07f6 --- /dev/null +++ b/src/soc/intel/common/block/pcie/pcie_helpers.c @@ -0,0 +1,40 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <console/console.h> +#include <device/device.h> +#include <intelblocks/pcie_rp.h> +#include <stdint.h> + +static uint32_t pcie_slot_enable_mask(unsigned int slot, unsigned int count) +{ + uint32_t mask = 0; + unsigned int i; + const struct device *dev; + + for (i = 0; i < count; i++) { + dev = pcidev_on_root(slot, i); + if (is_dev_enabled(dev)) + mask |= BIT(i); + } + + return mask; +} + +uint32_t pcie_rp_enable_mask(const struct pcie_rp_group *const groups) +{ + uint32_t mask = 0; + uint32_t offset = 0; + const struct pcie_rp_group *group; + + for (group = groups; group->count; ++group) { + if (group->count + offset >= sizeof(mask) * 8) { + printk(BIOS_ERR, "ERROR: %s: Root port count greater than mask size!\n", + __func__); + break; + } + mask |= pcie_slot_enable_mask(group->slot, group->count) << offset; + offset += group->count; + } + + return mask; +} |