preliminary Intel D945GCLF Atom+i945 support.

ram init fails, as the i945 driver currently only supports the mobile version
of the chipset..

Not sure how much sense it makes to check this in, but since it's a nice and
cheap board, maybe someone wants to work on this.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4879 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 116 insertions, 0 deletions

diff --git a/src/cpu/intel/model_106cx/cache_as_ram_disable.c b/src/cpu/intel/model_106cx/cache_as_ram_disable.c
new file mode 100644
index 0000000000..a56d7b0c0f
--- /dev/null
+++ b/src/cpu/intel/model_106cx/cache_as_ram_disable.c
@@ -0,0 +1,116 @@
+/*
+ * This file is part of the coreboot project.
+ * 
+ * Copyright (C) 2007-2008 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
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include "cpu/x86/car/copy_and_run.c"
+
+void real_main(unsigned long bist);
+
+void stage1_main(unsigned long bist)
+{
+	unsigned int cpu_reset = 0;
+
+#if CONFIG_USE_FALLBACK_IMAGE == 1
+        /* Is this a deliberate reset by the bios */
+        if (bios_reset_detected() && last_boot_normal()) {
+                goto normal_image;
+        } else {
+        	/* This is the primary cpu how should I boot? */
+		check_cmos_failed();
+		if (do_normal_boot()) {
+        	        goto normal_image;
+	        }
+        	else {
+	                goto fallback_image;
+        	}
+	}
+ normal_image:
+        __asm__ volatile ("jmp __normal_image"
+                : /* outputs */
+                : "a" (bist) /* inputs */
+                );
+ fallback_image:
+#endif
+
+	real_main(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);
+        }
+
+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 - ");
+
+	/* store cpu_reset to ebx */
+        __asm__ volatile (
+                "movl %0, %%ebx\n\t"
+                ::"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"
+	}
+
+	__asm__ volatile (
+                /* set new esp */ /* before _RAMBASE */
+                "subl   %0, %%ebp\n\t"
+                "subl   %0, %%esp\n\t"
+                ::"a"( (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)- CONFIG_RAMBASE )
+	);
+
+	{
+		unsigned new_cpu_reset;
+
+		/* get back cpu_reset from ebx */
+		__asm__ volatile (
+			"movl %%ebx, %0\n\t"
+			:"=a" (new_cpu_reset)
+		);
+
+#ifdef CONFIG_DEACTIVATE_CAR
+		print_debug("Deactivating CAR");
+#include CONFIG_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");
+}