AMD: Isolate AGESA and PI build environments

To backport features introduced with recent Chromebooks and/or Intel
boards in general, heavy work on the AMD AGESA platform infrastructure
is required. With the AGESA PI available in binary form only, community
members have little means to verify, debug and develop for the said
platforms.

Thus it makes sense to fork the existing agesawrapper interfaces, to give
AMD PI platforms a clean and independent sandbox. New directory layout
reflects the separation already taken place under 3rdparty/ and vendorcode/.

Change-Id: Ib60861266f8a70666617dde811663f2d5891a9e0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7149
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Bruce Griffith <Bruce.Griffith@se-eng.com>
Tested-by: build bot (Jenkins)

1 files changed, 110 insertions, 0 deletions

diff --git a/src/cpu/amd/pi/cache_as_ram.inc b/src/cpu/amd/pi/cache_as_ram.inc
new file mode 100644
index 000000000000..449cf693f293
--- /dev/null
+++ b/src/cpu/amd/pi/cache_as_ram.inc
@@ -0,0 +1,110 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ *
+ * 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
+ */
+
+/******************************************************************************
+ * AMD Generic Encapsulated Software Architecture
+ *
+ * $Workfile:: cache_as_ram.inc
+ *
+ * Description: cache_as_ram.inc - AGESA Module Entry Point for GCC complier
+ *
+ ******************************************************************************
+ */
+
+#include "gcccar.inc"
+#include <cpu/x86/cache.h>
+
+/*
+ * XMM map:
+ *   xmm0: BIST
+ *   xmm1: backup ebx -- cpu_init_detected
+ */
+
+.code32
+.globl cache_as_ram_setup, disable_cache_as_ram, cache_as_ram_setup_out
+
+cache_as_ram_setup:
+
+  post_code(0xa0)
+
+  /* enable SSE2 128bit instructions */
+  /* Turn on OSFXSR [BIT9] and OSXMMEXCPT [BIT10] onto CR4 register */
+
+  movl %cr4, %eax
+  orl $(3<<9), %eax
+  movl %eax, %cr4
+
+  /* Get the cpu_init_detected */
+  mov $1, %eax
+  cpuid
+  shr $24, %ebx
+
+  /* Save the BIST result */
+  cvtsi2sd  %ebp, %xmm0
+
+  /* for normal part %ebx already contain cpu_init_detected from fallback call */
+
+  /* Save the cpu_init_detected */
+  cvtsi2sd  %ebx, %xmm1
+
+  post_code(0xa1)
+  AMD_ENABLE_STACK
+
+  post_code(0xa1)
+
+  /* Restore the BIST result */
+  cvtsd2si  %xmm0, %edx
+
+  /* Restore the  cpu_init_detected */
+  cvtsd2si  %xmm1, %ebx
+
+  pushl %ebx  /* init detected */
+  pushl %edx  /* bist */
+  call  cache_as_ram_main
+
+  /* Should never see this postcode */
+  post_code(0xaf)
+stop:
+  jmp stop
+
+disable_cache_as_ram:
+  /* Save return stack */
+  movd 0(%esp), %xmm1
+  movd %esp, %xmm0
+
+  /* Disable cache */
+  movl	%cr0, %eax
+  orl	$CR0_CacheDisable, %eax
+  movl	%eax, %cr0
+
+  AMD_DISABLE_STACK
+
+  /* enable cache */
+  movl %cr0, %eax
+  andl $0x9fffffff, %eax
+  movl %eax, %cr0
+  xorl %eax, %eax
+
+  /* Restore the return stack */
+  wbinvd
+  movd %xmm0, %esp
+  movd %xmm1, (%esp)
+  ret
+
+cache_as_ram_setup_out: