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-rw-r--r--src/soc/intel/cannonlake/include/soc/iomap.h4
-rw-r--r--src/soc/intel/cannonlake/memmap.c19
2 files changed, 23 insertions, 0 deletions
diff --git a/src/soc/intel/cannonlake/include/soc/iomap.h b/src/soc/intel/cannonlake/include/soc/iomap.h
index 1ebaf3f7b6..9cfb59e7d0 100644
--- a/src/soc/intel/cannonlake/include/soc/iomap.h
+++ b/src/soc/intel/cannonlake/include/soc/iomap.h
@@ -68,6 +68,10 @@
#define HECI1_BASE_ADDRESS 0xfeda2000
+/* PTT registers */
+#define PTT_TXT_BASE_ADDRESS 0xfed30800
+#define PTT_PRESENT 0x00070000
+
#define VTD_BASE_ADDRESS 0xFED90000
#define VTD_BASE_SIZE 0x00004000
/*
diff --git a/src/soc/intel/cannonlake/memmap.c b/src/soc/intel/cannonlake/memmap.c
index f3286cce66..7adaa30b18 100644
--- a/src/soc/intel/cannonlake/memmap.c
+++ b/src/soc/intel/cannonlake/memmap.c
@@ -37,6 +37,22 @@ void smm_region(uintptr_t *start, size_t *size)
*size = sa_get_tseg_size();
}
+static bool is_ptt_enable(void)
+{
+ if ((read32((void *)PTT_TXT_BASE_ADDRESS) & PTT_PRESENT) ==
+ PTT_PRESENT)
+ return true;
+
+ return false;
+}
+
+/* Calculate PTT size */
+static size_t get_ptt_size(void)
+{
+ /* Allocate 4KB for PTT if enabled */
+ return is_ptt_enable() ? 4*KiB : 0;
+}
+
/* Calculate ME Stolen size */
static size_t get_imr_size(void)
{
@@ -130,6 +146,9 @@ static size_t calculate_reserved_mem_size(uintptr_t dram_base,
/* Get Tracehub size */
reserve_mem_base -= get_imr_size();
+ /* Get PTT size */
+ reserve_mem_base -= get_ptt_size();
+
/* Traditional Area Size */
reserve_mem_size = dram_base - reserve_mem_base;