diff options
Diffstat (limited to 'src/soc/intel/elkhartlake/p2sb.c')
-rw-r--r-- | src/soc/intel/elkhartlake/p2sb.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/soc/intel/elkhartlake/p2sb.c b/src/soc/intel/elkhartlake/p2sb.c new file mode 100644 index 0000000000..0ddd007920 --- /dev/null +++ b/src/soc/intel/elkhartlake/p2sb.c @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <console/console.h> +#include <intelblocks/p2sb.h> + +void p2sb_soc_get_sb_mask(uint32_t *ep_mask, size_t count) +{ + uint32_t mask; + + if (count != P2SB_EP_MASK_MAX_REG) { + printk(BIOS_ERR, "Unable to program EPMASK registers\n"); + return; + } + + /* Remove the host accessing right to PSF register range. + * Set p2sb PCI offset EPMASK5 [29, 28, 27, 26] to disable sideband + * access for PCI Root Bridge. + */ + mask = (1 << 29) | (1 << 28) | (1 << 27) | (1 << 26); + + ep_mask[P2SB_EP_MASK_5_REG] = mask; + + /* + * Set p2sb PCI offset EPMASK7 [31, 30] to disable Sideband + * access for Broadcast and Multicast. + */ + mask = (1 << 31) | (1 << 30); + + ep_mask[P2SB_EP_MASK_7_REG] = mask; +} |