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>

src/mainboard/intel/d510mo/romstage.c

@@ -31,6 +31,8 @@
 #include <superio/winbond/common/winbond.h>
 #include <lib.h>
 #include <arch/stages.h>
+#include <cbmem.h>
+#include <romstage_handoff.h>
 
 #define SERIAL_DEV PNP_DEV(0x4e, W83627THG_SP1)
 #define SUPERIO_DEV PNP_DEV(0x4e, 0)
@@ -99,6 +101,8 @@ static void rcba_config(void)
 void mainboard_romstage_entry(unsigned long bist)
 {
 	const u8 spd_addrmap[4] = { 0x50, 0x51, 0, 0 };
+	int cbmem_was_initted;
+	int s3resume = 0;
 
 	if (bist == 0)
 		enable_lapic();
@@ -131,4 +135,14 @@ void mainboard_romstage_entry(unsigned long bist)
 	ram_check(0x200000,0x300000);
 
 	rcba_config();
+
+	cbmem_was_initted = !cbmem_recovery(s3resume);
+
+	if (!cbmem_was_initted && s3resume) {
+		/* Failed S3 resume, reset to come up cleanly */
+		outb(0x6, 0xcf9);
+		halt();
+	}
+
+	romstage_handoff_init(s3resume);
 }

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
 

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>

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)

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);
+}

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>