nb/intel/pineview: Move to early cbmem

TESTED on D510MO.

Change-Id: I05aa40df0d2a090fcf734416669e9e1bbff094e4
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/19414
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

5 files changed, 47 insertions, 6 deletions

diff --git a/src/northbridge/intel/pineview/Kconfig b/src/northbridge/intel/pineview/Kconfig
index 5b34fb2bfe..3cfda9f97e 100644
--- a/src/northbridge/intel/pineview/Kconfig
+++ b/src/northbridge/intel/pineview/Kconfig
@@ -23,7 +23,6 @@ config NORTHBRIDGE_SPECIFIC_OPTIONS # dummy
 	def_bool y
 	select HAVE_DEBUG_RAM_SETUP
 	select LAPIC_MONOTONIC_TIMER
-	select LATE_CBMEM_INIT
 	select VGA
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 
diff --git a/src/northbridge/intel/pineview/early_init.c b/src/northbridge/intel/pineview/early_init.c
index e1cf95f298..3984fb7a07 100644
--- a/src/northbridge/intel/pineview/early_init.c
+++ b/src/northbridge/intel/pineview/early_init.c
@@ -20,7 +20,6 @@
 #include <arch/io.h>
 #include <device/pci_def.h>
 #include <device/pci.h>
-#include <cbmem.h>
 #include <halt.h>
 #include <string.h>
 #include <northbridge/intel/pineview/pineview.h>
diff --git a/src/northbridge/intel/pineview/northbridge.c b/src/northbridge/intel/pineview/northbridge.c
index 6fc841c09e..b7fd8a1085 100644
--- a/src/northbridge/intel/pineview/northbridge.c
+++ b/src/northbridge/intel/pineview/northbridge.c
@@ -25,7 +25,6 @@
 #include <cpu/cpu.h>
 #include <boot/tables.h>
 #include <arch/acpi.h>
-#include <cbmem.h>
 #include <northbridge/intel/pineview/pineview.h>
 
 /* Reserve everything between A segment and 1MB:
@@ -126,8 +125,6 @@ static void mch_domain_read_resources(device_t dev)
 	}
 
 	add_fixed_resources(dev, index);
-
-	set_top_of_ram(tomk << 10);
 }
 
 static void mch_domain_set_resources(device_t dev)
diff --git a/src/northbridge/intel/pineview/ram_calc.c b/src/northbridge/intel/pineview/ram_calc.c
index af1ca72dba..63f39428db 100644
--- a/src/northbridge/intel/pineview/ram_calc.c
+++ b/src/northbridge/intel/pineview/ram_calc.c
@@ -22,6 +22,8 @@
 #include <console/console.h>
 #include <cbmem.h>
 #include <northbridge/intel/pineview/pineview.h>
+#include <cpu/x86/mtrr.h>
+#include <cpu/intel/romstage.h>
 
 u8 decode_pciebar(u32 *const base, u32 *const len)
 {
@@ -91,3 +93,48 @@ u32 decode_igd_gtt_size(const u32 gsm)
 	}
 	return (u32)(gsmsize[gsm] << 10);
 }
+
+/* Depending of UMA and TSEG configuration, TSEG might start at any
+ * 1 MiB aligment. As this may cause very greedy MTRR setup, push
+ * CBMEM top downwards to 4 MiB boundary.
+ */
+void *cbmem_top(void)
+{
+	uintptr_t top_of_ram = pci_read_config32(PCI_DEV(0, 0, 0), TSEG);
+	top_of_ram = ALIGN_DOWN(top_of_ram, 4*MiB);
+	return (void *) top_of_ram;
+}
+
+#define ROMSTAGE_RAM_STACK_SIZE 0x5000
+
+/* setup_stack_and_mtrrs() determines the stack to use after
+ * cache-as-ram is torn down as well as the MTRR settings to use. */
+void *setup_stack_and_mtrrs(void)
+{
+	struct postcar_frame pcf;
+	uintptr_t top_of_ram;
+
+	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+		die("Unable to initialize postcar frame.\n");
+
+	/* Cache the ROM as WP just below 4GiB. */
+	postcar_frame_add_mtrr(&pcf, -CACHE_ROM_SIZE, CACHE_ROM_SIZE,
+		MTRR_TYPE_WRPROT);
+
+	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
+	postcar_frame_add_mtrr(&pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
+
+	/* Cache two separate 4 MiB regions below the top of ram, this
+	 * satisfies MTRR alignment requirements. If you modify this to
+	 * cover TSEG, make sure UMA region is not set with WRBACK as it
+	 * causes hard-to-recover boot failures.
+	 */
+	top_of_ram = (uintptr_t)cbmem_top();
+	postcar_frame_add_mtrr(&pcf, top_of_ram - 4*MiB, 4*MiB, MTRR_TYPE_WRBACK);
+	postcar_frame_add_mtrr(&pcf, top_of_ram - 8*MiB, 4*MiB, MTRR_TYPE_WRBACK);
+
+	/* Save the number of MTRRs to setup. Return the stack location
+	 * pointing to the number of MTRRs.
+	 */
+	return postcar_commit_mtrrs(&pcf);
+}
diff --git a/src/northbridge/intel/pineview/raminit.c b/src/northbridge/intel/pineview/raminit.c
index 69880580c1..330c912a12 100644
--- a/src/northbridge/intel/pineview/raminit.c
+++ b/src/northbridge/intel/pineview/raminit.c
@@ -15,7 +15,6 @@
  */
 
 #include <arch/io.h>
-#include <cbmem.h>
 #include <console/console.h>
 #include <cpu/x86/cache.h>
 #include <cpu/x86/mtrr.h>