CBMEM high table memory manager.

This code adds a very simple toc based memory manager for the high tables area.
The purpose of this code is to make it simpler and more reliable to find
certain data structures in memory. This will also make it possible to have ACPI
S3 Resume working without an ugly hole at 31MB.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4860 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 27 insertions, 33 deletions

diff --git a/src/cpu/intel/model_6ex/cache_as_ram_disable.c b/src/cpu/intel/model_6ex/cache_as_ram_disable.c
index b95447da73..a22978e051 100644
--- a/src/cpu/intel/model_6ex/cache_as_ram_disable.c
+++ b/src/cpu/intel/model_6ex/cache_as_ram_disable.c
@@ -1,7 +1,7 @@
 /*
  * This file is part of the coreboot project.
  * 
- * Copyright (C) 2007-2008 coresystems GmbH
+ * Copyright (C) 2007-2009 coresystems GmbH
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -53,24 +53,20 @@ void stage1_main(unsigned long bist)
 
 	/* No servicable parts below this line .. */
 
-        {
-        	/* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
-	        unsigned v_esp;
-	        __asm__ volatile (
-        	        "movl   %%esp, %0\n\t"
-	                : "=a" (v_esp)
-	        );
-	        printk_spew("v_esp=%08x\r\n", v_esp);
-        }
+#if CAR_DEBUG
+        /* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
+	unsigned v_esp;
+	__asm__ volatile (
+        	"movl   %%esp, %0\n"
+		: "=a" (v_esp)
+	);
+	printk_spew("v_esp=%08x\n", v_esp);
+#endif
 
 cpu_reset_x:
 
-        printk_spew("cpu_reset = %08x\r\n",cpu_reset);
-
-	if(cpu_reset == 0) {
-	        print_spew("Clearing initial memory region: ");
-	}
-	print_spew("No cache as ram now - ");
+        printk_spew("cpu_reset = %08x\n", cpu_reset);
+	printk_spew("No cache as ram now - ");
 
 	/* store cpu_reset to ebx */
         __asm__ volatile (
@@ -78,19 +74,22 @@ cpu_reset_x:
                 ::"a" (cpu_reset)
         );
 
-	if(cpu_reset==0) {
-#define CLEAR_FIRST_1M_RAM 1
-#include "cache_as_ram_post.c"
-	} else {
 #undef CLEAR_FIRST_1M_RAM 
 #include "cache_as_ram_post.c"
-	}
+
+	/* For now: use rambase + 1MB - 64K (counting downwards) as stack. This
+	 * makes sure that we stay completely within the 1M of memory we
+	 * preserve with the memcpy above.
+	 */
+
+#ifndef HIGH_MEMORY_SAVE
+#define HIGH_MEMORY_SAVE ( (1024 - 64) * 1024 )
+#endif
 
 	__asm__ volatile (
-                /* set new esp */ /* before CONFIG_RAMBASE */
-                "subl   %0, %%ebp\n\t"
-                "subl   %0, %%esp\n\t"
-                ::"a"( (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)- CONFIG_RAMBASE )
+		"movl %0, %%ebp\n"
+		"movl %0, %%esp\n"
+		:: "a" (CONFIG_RAMBASE + HIGH_MEMORY_SAVE)
 	);
 
 	{
@@ -98,19 +97,14 @@ cpu_reset_x:
 
 		/* get back cpu_reset from ebx */
 		__asm__ volatile (
-			"movl %%ebx, %0\n\t"
+			"movl %%ebx, %0\n"
 			:"=a" (new_cpu_reset)
 		);
 
-#ifdef DEACTIVATE_CAR
-		print_debug("Deactivating CAR");
-#include DEACTIVATE_CAR_FILE
-		print_debug(" - Done.\r\n");
-#endif
 		/* Copy and execute coreboot_ram */
 		copy_and_run(new_cpu_reset);
-		/* We will not return */
 	}
 
-	print_debug("sorry. parachute did not open.\r\n");
+	/* We will not return */
+	printk_debug("sorry. parachute did not open.\n");
 }