[coreboot] [commit] r5677 - in trunk/src: mainboard/jetway/j7f24 northbridge/via/cn700 southbridge/via/vt8237r

repository service svn at coreboot.org
Sun Aug 1 19:20:21 CEST 2010


Author: stepan
Date: Sun Aug  1 19:20:20 2010
New Revision: 5677
URL: https://tracker.coreboot.org/trac/coreboot/changeset/5677

Log:
Clarify a comment on an old hack, remove the call to early_mtrr_init
that causes CAR to hang, provide more debugging output wrt memory size,
and correct the numbering on the ram init sequence.

Signed-off-by: Corey Osgood <corey.osgood at gmail.com>
Acked-by: Stefan Reinauer <stepan at coresystems.de>

Modified:
   trunk/src/mainboard/jetway/j7f24/romstage.c
   trunk/src/northbridge/via/cn700/northbridge.c
   trunk/src/northbridge/via/cn700/raminit.c
   trunk/src/southbridge/via/vt8237r/vt8237r_early_smbus.c

Modified: trunk/src/mainboard/jetway/j7f24/romstage.c
==============================================================================
--- trunk/src/mainboard/jetway/j7f24/romstage.c	Sun Aug  1 17:41:14 2010	(r5676)
+++ trunk/src/mainboard/jetway/j7f24/romstage.c	Sun Aug  1 19:20:20 2010	(r5677)
@@ -99,11 +99,6 @@
 	enable_smbus();
 	smbus_fixup(&ctrl);
 
-	if (bist == 0) {
-		print_debug("doing early_mtrr\n");
-		early_mtrr_init();
-	}
-
 	/* Halt if there was a built-in self test failure. */
 	report_bist_failure(bist);
 

Modified: trunk/src/northbridge/via/cn700/northbridge.c
==============================================================================
--- trunk/src/northbridge/via/cn700/northbridge.c	Sun Aug  1 17:41:14 2010	(r5676)
+++ trunk/src/northbridge/via/cn700/northbridge.c	Sun Aug  1 19:20:20 2010	(r5677)
@@ -177,7 +177,7 @@
 		}
 
 		tomk = rambits * 64 * 1024;
-		printk(BIOS_SPEW, "tomk is 0x%lx\n", tomk);
+		printk(BIOS_DEBUG, "tomk is 0x%lx\n", tomk);
 		/* Compute the Top Of Low Memory (TOLM), in Kb. */
 		tolmk = pci_tolm >> 10;
 		if (tolmk >= tomk) {

Modified: trunk/src/northbridge/via/cn700/raminit.c
==============================================================================
--- trunk/src/northbridge/via/cn700/raminit.c	Sun Aug  1 17:41:14 2010	(r5676)
+++ trunk/src/northbridge/via/cn700/raminit.c	Sun Aug  1 19:20:20 2010	(r5677)
@@ -183,6 +183,8 @@
 
 	if (result == 0xff)
 		die("DRAM module size too big, not supported by CN700\n");
+	else
+		printk(BIOS_DEBUG, "Found %iMB of ram\n", result * ranks * 64);
 
 	pci_write_config8(ctrl->d0f3, 0x40, result);
 	pci_write_config8(ctrl->d0f3, 0x48, 0x00);
@@ -400,18 +402,18 @@
 	read32(rank_address + 0x10);
 
 	/* 3. Mode register set. */
-	PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\n");
+	PRINT_DEBUG_MEM("RAM Enable 3: Mode register set\n");
 	do_ram_command(dev, RAM_COMMAND_MRS);
 	read32(rank_address + 0x120000);	/* EMRS DLL Enable */
 	read32(rank_address + 0x800);		/* MRS DLL Reset */
 
 	/* 4. Precharge all again. */
-	PRINT_DEBUG_MEM("RAM Enable 2: Precharge all\n");
+	PRINT_DEBUG_MEM("RAM Enable 4: Precharge all\n");
 	do_ram_command(dev, RAM_COMMAND_PRECHARGE);
 	read32(rank_address + 0x0);
 
 	/* 5. Perform 8 refresh cycles. Wait tRC each time. */
-	PRINT_DEBUG_MEM("RAM Enable 3: CBR\n");
+	PRINT_DEBUG_MEM("RAM Enable 5: CBR\n");
 	do_ram_command(dev, RAM_COMMAND_CBR);
 	for (i = 0; i < 8; i++) {
 		read32(rank_address + 0x20);
@@ -419,7 +421,7 @@
 	}
 
 	/* 6. Mode register set. */
-	PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\n");
+	PRINT_DEBUG_MEM("RAM Enable 6: Mode register set\n");
 	/* Safe value for now, BL=8, WR=5, CAS=4 */
 	/*
 	 * (E)MRS values are from the BPG. No direct explanation is given, but
@@ -432,7 +434,7 @@
 	read32(rank_address + 0x120020); /* EMRS OCD Calibration Mode Exit */
 
 	/* 8. Normal operation */
-	PRINT_DEBUG_MEM("RAM Enable 5: Normal operation\n");
+	PRINT_DEBUG_MEM("RAM Enable 7: Normal operation\n");
 	do_ram_command(dev, RAM_COMMAND_NORMAL);
 	read32(rank_address + 0x30);
 }

Modified: trunk/src/southbridge/via/vt8237r/vt8237r_early_smbus.c
==============================================================================
--- trunk/src/southbridge/via/vt8237r/vt8237r_early_smbus.c	Sun Aug  1 17:41:14 2010	(r5676)
+++ trunk/src/southbridge/via/vt8237r/vt8237r_early_smbus.c	Sun Aug  1 19:20:20 2010	(r5677)
@@ -61,8 +61,10 @@
 
 	PRINT_DEBUG("Waiting until SMBus ready\n");
 
-	/* Yes, this is a mess, but it's the easiest way to do it. */
-	/* XXX not so messy, but an explanation of the hack would have been better */
+	/* Loop up to SMBUS_TIMEOUT times, waiting for bit 0 of the
+	 * SMBus Host Status register to go to 0, indicating the operation
+	 * was completed successfully. I don't remember why I did it this way,
+	 * but I think it was because ROMCC was running low on registers */
 	loops = 0;
 	while ((inb(SMBHSTSTAT) & 1) == 1 && loops < SMBUS_TIMEOUT)
 		++loops;




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