soc/intel/xeon_sp: Add SAD PCI driver

Get rid of some helper functions by properly using a pci_driver.

Configure SAD if necessary and lock SAD if necessary in the newly added
SAD PCI driver. This allows to drop lock_pam0123(), unlock_pam_regions()
and socket0_get_ubox_busno().

- Fixes SAD instance on secondary sockets not decoding the C-F segments
  as DRAM, which would prevent those sockets to access the ACPI/SMBIOS
  table anchor
- Adds PCI multi segment support
  (SKX and CPX only, other were working properly already)
- Moves locking of PAM0123_CSR and PAM456_CSR from SoC to driver code

Change-Id: I167b6ce48631fe3f97359ee33704f52ca854dbd1
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84794
Reviewed-by: Shuo Liu <shuo.liu@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 0 insertions, 4 deletions

diff --git a/src/soc/intel/xeon_sp/include/soc/chip_common.h b/src/soc/intel/xeon_sp/include/soc/chip_common.h
index ed278a3cd2..73eeea5c59 100644
--- a/src/soc/intel/xeon_sp/include/soc/chip_common.h
+++ b/src/soc/intel/xeon_sp/include/soc/chip_common.h
@@ -85,8 +85,6 @@ bool is_cxl_domain(const struct device *dev);
 
 #define is_stack0(socket, stack) (socket == 0 && stack == IioStack0)
 
-void unlock_pam_regions(void);
-
 size_t vtd_probe_bar_size(struct device *dev);
 
 void soc_pci_domain_fill_ssdt(const struct device *domain);
diff --git a/src/soc/intel/xeon_sp/include/soc/util.h b/src/soc/intel/xeon_sp/include/soc/util.h
index a7b98f3ae6..4c7c75fdeb 100644
--- a/src/soc/intel/xeon_sp/include/soc/util.h
+++ b/src/soc/intel/xeon_sp/include/soc/util.h
@@ -9,8 +9,6 @@
 
 #define MEM_ADDR_64MB_SHIFT_BITS 26
 
-void lock_pam0123(void);
-
 msr_t read_msr_ppin(void);
 int get_platform_thread_count(void);
 const IIO_UDS *get_iio_uds(void);