New patch to review for coreboot: eb8e178 Add ability to configure background scrubbing rate and ECC redirection at compile time on AMD systems

[Timothy Pearson]

Timothy Pearson ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8263

-gerrit

commit eb8e178bc5eb6e91bf29ad3920abec3decb43335
Author: Timothy Pearson 
Date:   Fri Jan 23 20:24:30 2015 -0600

Add ability to configure background scrubbing rate and ECC redirection at compile time on AMD systems

Change-Id: Icbbba0037c19bdc279813e51c72f54a10e4dc55a
    Signed-off-by: Timothy Pearson 
---
 src/northbridge/amd/Kconfig                  | 36 ++++++++++++++++++++++++++++
 src/northbridge/amd/amdmct/wrappers/mcti_d.c |  8 +++++++
 2 files changed, 44 insertions(+)

diff --git a/src/northbridge/amd/Kconfig b/src/northbridge/amd/Kconfig
index e9b3796..34388b2 100644
--- a/src/northbridge/amd/Kconfig
+++ b/src/northbridge/amd/Kconfig
@@ -98,4 +98,40 @@ config LIMIT_HT_UP_WIDTH_16
    bool "16 bits"
 endchoice

+config AMDMCT_ENABLE_ECC_REDIR
+	bool
+	default n
+
+config AMDMCT_BACKGROUND_SCRUB_RATE
+	hex
+	default 0x00
+	help
+	  This option sets the background ECC memory scub rate
+
+	  Permissible values are:
+
+	  0x00;	Disabled
+	  0x01;	40ns
+	  0x02;	80ns
+	  0x03;	160ns
+	  0x04;	320ns
+	  0x05;	640ns
+	  0x06;	1.28us
+	  0x07;	2.56us
+	  0x08;	5.12us
+	  0x09;	10.2us
+	  0x0a;	20.5us
+	  0x0b;	41us
+	  0x0c;	81.9us
+	  0x0d;	163.8us
+	  0x0e;	327.7us
+	  0x0f;	655.4us
+	  0x10;	1.31ms
+	  0x11;	2.62ms
+	  0x12;	5.24ms
+	  0x13;	10.49ms
+	  0x14;	20.97sms
+	  0x15;	42ms
+	  0x16;	84ms
+
 endmenu
diff --git a/src/northbridge/amd/amdmct/wrappers/mcti_d.c b/src/northbridge/amd/amdmct/wrappers/mcti_d.c
index e127322..46873e5 100644
--- a/src/northbridge/amd/amdmct/wrappers/mcti_d.c
+++ b/src/northbridge/amd/amdmct/wrappers/mcti_d.c
@@ -167,10 +167,17 @@ static u16 mctGet_NVbits(u8 index)
 #endif
    	break;
    case NV_ECCRedir:
+#ifdef CONFIG_AMDMCT_ENABLE_ECC_REDIR
+		val = CONFIG_AMDMCT_ENABLE_ECC_REDIR;
+#else
    	val = 0;	/* Disable */
    	//val = 1;	/* Enable */
+#endif
    	break;
    case NV_DramBKScrub:
+#ifdef CONFIG_AMDMCT_BACKGROUND_SCRUB_RATE
+		val = CONFIG_AMDMCT_BACKGROUND_SCRUB_RATE;
+#else
    	val = 0x00;	/* Disabled */
    	//val = 0x01;	/* 40ns */
    	//val = 0x02;	/* 80ns */
@@ -194,6 +201,7 @@ static u16 mctGet_NVbits(u8 index)
    	//val = 0x14;	/* 20.97sms */
    	//val = 0x15;	/* 42ms */
    	//val = 0x16;	/* 84ms */
+#endif
    	break;
    case NV_L2BKScrub:
    	val = 0;	/* Disabled - See L2Scrub in BKDG */