soc/intel/common: support for configurable memory regions claimed by SA

see https://review.coreboot.org/c/coreboot/+/65072/8

BUG=b:149830546
BRANCH=firmware-brya-14505.B
TEST='emerge-brya coreboot chromeos-bootimage' builds correctly.
Tested on an Anahera device which successfully boots to ChromeOS
with kernel version 5.10.109-15688-g857e654d1705.

Change-Id: I80df95f9146934d6a2d23e525c22be3a9a7e2b9f
Signed-off-by: Eran Mitrani <mitrani@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64677
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/common/block/include/intelblocks/systemagent.h

@@ -17,6 +17,23 @@
 #define TSEG	0xb8 /* TSEG base */
 #define TOLUD	0xbc /* Top of Low Used Memory */
 
+/* PCIEXBAR register fields */
+#define PCIEXBAR_LENGTH_4096MB	6
+#define PCIEXBAR_LENGTH_2048MB	5
+#define PCIEXBAR_LENGTH_1024MB	4
+#define PCIEXBAR_LENGTH_512MB	3
+#define PCIEXBAR_LENGTH_64MB	2
+#define PCIEXBAR_LENGTH_128MB	1
+#define PCIEXBAR_LENGTH_256MB	0
+#define  PCIEXBAR_PCIEXBAREN	(1 << 0)
+
+/* GMCH Graphics Control Register */
+#define GGC		0x50
+#define  G_GMS_OFFSET	0x8
+#define  G_GMS_MASK	0xff00
+#define  G_GGMS_OFFSET	0x6
+#define  G_GGMS_MASK	0xc0
+
 /* MCHBAR */
 #define MCHBAR8(x)	(*(volatile u8 *)(uintptr_t)(MCH_BASE_ADDRESS + x))
 #define MCHBAR16(x)	(*(volatile u16 *)(uintptr_t)(MCH_BASE_ADDRESS + x))
@@ -95,6 +112,13 @@ void soc_systemagent_init(struct device *dev);
  */
 void soc_add_fixed_mmio_resources(struct device *dev, int *resource_cnt);
 
+/*
+ * SoC call to provide all known configurable memory ranges for Device 0:0.0.
+ * SoC function should provide configurable resource ranges in form of
+ * struct sa_mmio_descriptor along with resource count.
+ */
+void soc_add_configurable_mmio_resources(struct device *dev, int *resource_cnt);
+
 /* SoC specific APIs to get UNCORE PRMRR base and mask values
  * returns 0, if able to get base and mask values; otherwise returns -1 */
 int soc_get_uncore_prmmr_base_and_mask(uint64_t *base, uint64_t *mask);

src/soc/intel/common/block/systemagent/systemagent.c

@@ -30,6 +30,12 @@ __weak void soc_add_fixed_mmio_resources(struct device *dev,
 	/* no-op */
 }
 
+__weak void soc_add_configurable_mmio_resources(struct device *dev,
+		int *resource_cnt)
+{
+	/* no-op */
+}
+
 __weak int soc_get_uncore_prmmr_base_and_mask(uint64_t *base,
 		uint64_t *mask)
 {
@@ -98,6 +104,10 @@ void sa_add_fixed_mmio_resources(struct device *dev, int *resource_cnt,
 		size = sa_fixed_resources[i].size;
 		base = sa_fixed_resources[i].base;
 
+		printk(BIOS_DEBUG, "SA MMIO resource: %s ->  base = 0x%llx, size = 0x%llx\n",
+			sa_fixed_resources[i].description, sa_fixed_resources[i].base,
+			sa_fixed_resources[i].size);
+
 		mmio_resource(dev, index++, base / KiB, size / KiB);
 	}
 
@@ -273,6 +283,10 @@ static void systemagent_read_resources(struct device *dev)
 
 	/* Add all fixed MMIO resources. */
 	soc_add_fixed_mmio_resources(dev, &index);
+
+	/* Add all configurable MMIO resources. */
+	soc_add_configurable_mmio_resources(dev, &index);
+
 	/* Calculate and add DRAM resources. */
 	sa_add_dram_resources(dev, &index);
 	if (CONFIG(SA_ENABLE_IMR))

src/soc/intel/common/block/systemagent/systemagent_def.h

@@ -5,12 +5,7 @@
 
 /* Device 0:0.0 PCI configuration space */
 
-/* GMCH Graphics Control Register */
-#define GGC		0x50
-#define  G_GMS_OFFSET	0x8
-#define  G_GMS_MASK	0xff00
-#define  G_GGMS_OFFSET	0x6
-#define  G_GGMS_MASK	0xc0
+
 /* DPR register in case CONFIG_SA_ENABLE_DPR is selected by SoC */
 #define DPR		0x5c
 #define  DPR_EPM	(1 << 2)
@@ -22,11 +17,6 @@
 #define  CAPID_PDCD	(1 << 12)
 #define  CAPID_DDRSZ(x)	(((x) >> 19) & 0x3)
 
-#define  PCIEXBAR_LENGTH_64MB	2
-#define  PCIEXBAR_LENGTH_128MB	1
-#define  PCIEXBAR_LENGTH_256MB	0
-#define  PCIEXBAR_PCIEXBAREN	(1 << 0)
-
 #define PAM0	0x80
 #define PAM1	0x81
 #define PAM2	0x82