summaryrefslogtreecommitdiff
path: root/src/northbridge/intel/nehalem
diff options
context:
space:
mode:
authorKyösti Mälkki <kyosti.malkki@gmail.com>2016-07-22 22:52:14 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2018-04-09 12:03:58 +0000
commit2c3fd499cf0672a8da669e40be84112a02b5a77c (patch)
treec2caa870a8923a4a87bfd3507029b0ddf6484114 /src/northbridge/intel/nehalem
parentd538dd1fe70a333c929a2eb7c4106608bcd05257 (diff)
downloadcoreboot-2c3fd499cf0672a8da669e40be84112a02b5a77c.tar.xz
intel/nehalem post-car: Use postcar_frame for MTRR setup
Adapt implementation from skylake to prepare for removal of HIGH_MEMORY_SAVE and moving on to RELOCATABLE_RAMSTAGE. With the change, CBMEM and SMM regions are set to WRBACK with MTRRs and romstage ram stack is moved to CBMEM. Change-Id: I84f6fa6f37a7348b2d4ad9f08a18bebe4b1e34e2 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/15793 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/northbridge/intel/nehalem')
-rw-r--r--src/northbridge/intel/nehalem/Kconfig2
-rw-r--r--src/northbridge/intel/nehalem/ram_calc.c35
2 files changed, 35 insertions, 2 deletions
diff --git a/src/northbridge/intel/nehalem/Kconfig b/src/northbridge/intel/nehalem/Kconfig
index 4fdd2bd282..6a9d0debad 100644
--- a/src/northbridge/intel/nehalem/Kconfig
+++ b/src/northbridge/intel/nehalem/Kconfig
@@ -20,8 +20,8 @@ config NORTHBRIDGE_INTEL_NEHALEM
select INTEL_EDID
select TSC_MONOTONIC_TIMER
select INTEL_GMA_ACPI
+ select RELOCATABLE_RAMSTAGE
select NORTHBRIDGE_INTEL_COMMON_MRC_CACHE
- select ACPI_HUGE_LOWMEM_BACKUP
select HAVE_LINEAR_FRAMEBUFFER if MAINBOARD_DO_NATIVE_VGA_INIT
select HAVE_VGA_TEXT_FRAMEBUFFER if MAINBOARD_DO_NATIVE_VGA_INIT
diff --git a/src/northbridge/intel/nehalem/ram_calc.c b/src/northbridge/intel/nehalem/ram_calc.c
index 4d73ee9fc2..37c1ed3420 100644
--- a/src/northbridge/intel/nehalem/ram_calc.c
+++ b/src/northbridge/intel/nehalem/ram_calc.c
@@ -1,6 +1,7 @@
/*
* This file is part of the coreboot project.
*
+ * Copyright (C) 2012 ChromeOS Authors
* Copyright (C) 2013 Vladimir Serbinenko.
*
* This program is free software; you can redistribute it and/or modify
@@ -15,9 +16,13 @@
#define __SIMPLE_DEVICE__
+#include <arch/cpu.h>
#include <arch/io.h>
#include <cbmem.h>
+#include <console/console.h>
#include <cpu/intel/romstage.h>
+#include <cpu/x86/mtrr.h>
+#include <program_loading.h>
#include "nehalem.h"
static uintptr_t smm_region_start(void)
@@ -32,7 +37,35 @@ void *cbmem_top(void)
return (void *) smm_region_start();
}
+#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)
{
- return (void*)CONFIG_RAMTOP;
+ 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 at least 8 MiB below the top of ram, and at most 8 MiB
+ * above top of the ram. This satisfies MTRR alignment requirement
+ * with different TSEG size configurations.
+ */
+ top_of_ram = ALIGN_DOWN((uintptr_t)cbmem_top(), 8*MiB);
+ postcar_frame_add_mtrr(&pcf, top_of_ram - 8*MiB, 8*MiB, MTRR_TYPE_WRBACK);
+ postcar_frame_add_mtrr(&pcf, top_of_ram, 8*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);
}