From 17bb225be7dd031b9803f33dec88e9d53e3a582f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ky=C3=B6sti=20M=C3=A4lkki?= <kyosti.malkki@gmail.com>
Date: Wed, 19 Apr 2017 19:55:54 +0300
Subject: [PATCH] AMD MTRR: Add common add_uma_resource_below_tolm()
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Change-Id: I9eee88dc619ac5d9c77153db522a6ead65f6c9b1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/19376
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
---
 src/cpu/amd/mtrr/amd_mtrr.c | 18 ++++++++++++++++++
 src/include/cpu/amd/mtrr.h  |  2 ++
 2 files changed, 20 insertions(+)

diff --git a/src/cpu/amd/mtrr/amd_mtrr.c b/src/cpu/amd/mtrr/amd_mtrr.c
index a0a51943ab..9d9d7b7c19 100644
--- a/src/cpu/amd/mtrr/amd_mtrr.c
+++ b/src/cpu/amd/mtrr/amd_mtrr.c
@@ -11,6 +11,7 @@
  * GNU General Public License for more details.
  */
 
+#include <cbmem.h>
 #include <console/console.h>
 #include <device/device.h>
 #include <arch/cpu.h>
@@ -76,6 +77,23 @@ static void setup_ap_ramtop(void)
 	wrmsr(TOP_MEM2, msr);
 }
 
+void add_uma_resource_below_tolm(struct device *nb, int idx)
+{
+	uint32_t topmem = bsp_topmem();
+	uint32_t top_of_cacheable = get_top_of_ram();
+
+	if (top_of_cacheable == topmem)
+		return;
+
+	uint32_t uma_base = top_of_cacheable;
+	uint32_t uma_size = topmem - top_of_cacheable;
+
+	printk(BIOS_INFO, "%s: uma size 0x%08x, memory start 0x%08x\n",
+			__func__, uma_size, uma_base);
+
+	uma_resource(nb, idx, uma_base / KiB, uma_size / KiB);
+}
+
 void amd_setup_mtrrs(void)
 {
 	unsigned long address_bits;
diff --git a/src/include/cpu/amd/mtrr.h b/src/include/cpu/amd/mtrr.h
index b65c23b83a..b31648d0af 100644
--- a/src/include/cpu/amd/mtrr.h
+++ b/src/include/cpu/amd/mtrr.h
@@ -41,6 +41,8 @@
 #include <cpu/x86/msr.h>
 
 void amd_setup_mtrrs(void);
+struct device;
+void add_uma_resource_below_tolm(struct device *nb, int idx);
 
 static inline __attribute__((always_inline)) msr_t rdmsr_amd(unsigned int index)
 {