[coreboot] [PATCH] Fix AMD 690 HIGH_TABLES

[Carl-Daniel Hailfinger]

Hi,

Myles, this is the patch which fixes HIGH_TABLES with UMA.
Zheng, I think you wanted to test if it fixes HIGH_TABLES for you as well.

On 11.06.2009 02:10, Carl-Daniel Hailfinger wrote:
> On 05.06.2009 12:51, Carl-Daniel Hailfinger wrote:
>   
>> Zheng, can you please test this with HIGH_TABLES enabled (and a new FILO)?
>> A full log would be appreciated. Thanks.
>>
>> This hopefully will fix AMD 690 HIGH_TABLES or at least give me an
>> insight into why HIGH_TABLES fails.
>>
>> Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>
>>   
>>     
>
> I just tested the patch and it works perfectly with a recent FILO.
>
> This patch is not ready to be applied (it depends on AMD 690 code), but
> it illustrates what we need to to to get HIGH_TABLES working on the
> chipsets (usually with UMA graphics) which have problems with that setting.
>
> Basically, HIGH_TABLES are placed in UMA memory for some chipsets and
> that causes them to be overwritten by graphics drivers before they can
> be used.
>
> The preferred way to solve this would be a variable top_low_normal_memk
> which would be marking the upper end of non-UMA non-MMIO non-SMM memory
> below 4G.
>   

Rediffed against current svn.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>

Index: LinuxBIOSv2-asus_m2a-vm/src/northbridge/amd/amdk8/northbridge.c
===================================================================
--- LinuxBIOSv2-asus_m2a-vm/src/northbridge/amd/amdk8/northbridge.c	(Revision 4776)
+++ LinuxBIOSv2-asus_m2a-vm/src/northbridge/amd/amdk8/northbridge.c	(Arbeitskopie)
@@ -839,6 +839,7 @@
 #if CONFIG_HAVE_HIGH_TABLES==1
 #define HIGH_TABLES_SIZE 64	// maximum size of high tables in KB
 extern uint64_t high_tables_base, high_tables_size;
+extern uint64_t uma_memory_base, uma_memory_size;
 #endif
 
 static void amdk8_domain_set_resources(device_t dev)
@@ -1003,7 +1004,9 @@
 		}
 
 
-//		printk_debug("node %d : mmio_basek=%08x, basek=%08x, limitk=%08x\n", i, mmio_basek, basek, limitk); //yhlu
+		printk_debug("node %d : uma_memory_base/1024=0x%08x, mmio_basek=0x%08x, basek=0x%08x, limitk=0x%08x\n", i, uma_memory_base >> 10, mmio_basek, basek, limitk);
+		if ((uma_memory_base >> 10) < mmio_basek)
+			printk_alert("node %d: UMA memory starts below mmio_basek\n", i);
 
 		/* See if I need to split the region to accomodate pci memory space */
 		if ( (basek < 4*1024*1024 ) && (limitk > mmio_basek) ) {
@@ -1017,7 +1020,7 @@
 #if CONFIG_HAVE_HIGH_TABLES==1
 					if (i==0 && high_tables_base==0) {
 					/* Leave some space for ACPI, PIRQ and MP tables */
-						high_tables_base = (mmio_basek - HIGH_TABLES_SIZE) * 1024;
+						high_tables_base = ((uma_memory_base >> 10) - HIGH_TABLES_SIZE) * 1024;
 						high_tables_size = HIGH_TABLES_SIZE * 1024;
 						printk_debug(" split: %dK table at =%08llx\n", HIGH_TABLES_SIZE,
 							     high_tables_base);
@@ -1042,6 +1045,9 @@
 				sizek -= (4*1024*1024 - mmio_basek);
 			}
 		}
+
+		printk_debug("node %d : uma_memory_base/1024=0x%08x, mmio_basek=0x%08x, basek=0x%08x, limitk=0x%08x\n", i, uma_memory_base >> 10, mmio_basek, basek, limitk);
+
 		/* If sizek == 0, it was split at mmio_basek without a hole.
 		 * Don't create an empty ram_resource.
 		 */
@@ -1053,7 +1059,7 @@
 			     i, mmio_basek, basek, limitk);
 		if (i==0 && high_tables_base==0) {
 		/* Leave some space for ACPI, PIRQ and MP tables */
-			high_tables_base = (limitk - HIGH_TABLES_SIZE) * 1024;
+			high_tables_base = ((uma_memory_base >> 10) - HIGH_TABLES_SIZE) * 1024;
 			high_tables_size = HIGH_TABLES_SIZE * 1024;
 		}
 #endif


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