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authorKyösti Mälkki <kyosti.malkki@gmail.com>2016-11-22 12:00:52 +0200
committerKyösti Mälkki <kyosti.malkki@gmail.com>2017-03-28 01:57:37 +0200
commit77d3c4b69003a9b5d864190be334f7239623789c (patch)
treeaef99fe0e6956153509a901b2d4ae363c5e63654 /src/cpu
parent967d94d62630f46a2fab808754e7a2702658f3f0 (diff)
downloadcoreboot-77d3c4b69003a9b5d864190be334f7239623789c.tar.xz
AGESA: Fork for new cache-as-ram init code
To gradually consolidate and improve AGESA board romstages, fork the original CAR setup code as a separate file. It becomes too messy with preprocessor to attempt make changes within the same file, and at end of patchset original becomes obsolete. Change-Id: I256b675b1ab9e13c2bcc956e0d67c6c03e91f2ed Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/18620 Tested-by: build bot (Jenkins) Reviewed-by: Marc Jones <marc@marcjonesconsulting.com> Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/cpu')
-rw-r--r--src/cpu/amd/agesa/Makefile.inc4
-rw-r--r--src/cpu/amd/agesa/cache_as_ram_legacy.inc170
2 files changed, 174 insertions, 0 deletions
diff --git a/src/cpu/amd/agesa/Makefile.inc b/src/cpu/amd/agesa/Makefile.inc
index 60bae120bc..9853d63c5f 100644
--- a/src/cpu/amd/agesa/Makefile.inc
+++ b/src/cpu/amd/agesa/Makefile.inc
@@ -23,7 +23,11 @@ subdirs-$(CONFIG_CPU_AMD_AGESA_FAMILY16_KB) += family16kb
romstage-y += s3_resume.c
ramstage-y += s3_mtrr.c
+ifeq ($(CONFIG_AGESA_LEGACY), y)
+cpu_incs-y += $(src)/cpu/amd/agesa/cache_as_ram_legacy.inc
+else
cpu_incs-y += $(src)/cpu/amd/agesa/cache_as_ram.inc
+endif
romstage-y += heapmanager.c
ramstage-y += heapmanager.c
diff --git a/src/cpu/amd/agesa/cache_as_ram_legacy.inc b/src/cpu/amd/agesa/cache_as_ram_legacy.inc
new file mode 100644
index 0000000000..c0a69ec74a
--- /dev/null
+++ b/src/cpu/amd/agesa/cache_as_ram_legacy.inc
@@ -0,0 +1,170 @@
+/*
+ * 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.
+ */
+
+/******************************************************************************
+ * 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
+
+ /* Align the stack. */
+ and $0xFFFFFFF0, %esp
+
+#ifdef __x86_64__
+ /* switch to 64 bit long mode */
+ mov %esi, %ecx
+ add $0, %ecx # core number
+ xor %eax, %eax
+ lea (0x1000+0x23)(%ecx), %edi
+ mov %edi, (%ecx)
+ mov %eax, 4(%ecx)
+
+ lea 0x1000(%ecx), %edi
+ movl $0x000000e3, 0x00(%edi)
+ movl %eax, 0x04(%edi)
+ movl $0x400000e3, 0x08(%edi)
+ movl %eax, 0x0c(%edi)
+ movl $0x800000e3, 0x10(%edi)
+ movl %eax, 0x14(%edi)
+ movl $0xc00000e3, 0x18(%edi)
+ movl %eax, 0x1c(%edi)
+
+ # load ROM based identity mapped page tables
+ mov %ecx, %eax
+ mov %eax, %cr3
+
+ # enable PAE
+ mov %cr4, %eax
+ bts $5, %eax
+ mov %eax, %cr4
+
+ # enable long mode
+ mov $0xC0000080, %ecx
+ rdmsr
+ bts $8, %eax
+ wrmsr
+
+ # enable paging
+ mov %cr0, %eax
+ bts $31, %eax
+ mov %eax, %cr0
+
+ # use call far to switch to 64-bit code segment
+ ljmp $0x18, $1f
+1:
+ /* Pass the cpu_init_detected */
+ cvtsd2si %xmm1, %esi
+
+ /* Pass the BIST result */
+ cvtsd2si %xmm0, %edi
+
+
+ .code64
+ call cache_as_ram_main
+ .code32
+
+#else
+
+ /* Restore the BIST result */
+ cvtsd2si %xmm0, %edx
+
+ /* Restore the cpu_init_detected */
+ cvtsd2si %xmm1, %ebx
+
+ /* Must maintain 16-byte stack alignment here. */
+ pushl $0x0
+ pushl $0x0
+ pushl %ebx /* init detected */
+ pushl %edx /* bist */
+ call cache_as_ram_main
+#endif
+
+ /* 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:
+#ifdef __x86_64__
+.code64
+#endif