[Skiboot] [PATCH 07/15] asm: Add rom_entry.S

[Claudio Carvalho]

This adds the asm used to jump into the verification code copied to memory.

Signed-off-by: Claudio Carvalho <cclaudio at linux.vnet.ibm.com>
---
 asm/Makefile.inc |  2 +-
 asm/rom_entry.S  | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 asm/rom_entry.S

diff --git a/asm/Makefile.inc b/asm/Makefile.inc
index 4c858e2..2e678fd 100644
--- a/asm/Makefile.inc
+++ b/asm/Makefile.inc
@@ -1,7 +1,7 @@
 # -*-Makefile-*-
 
 SUBDIRS += asm 
-ASM_OBJS = head.o lock.o misc.o kernel-wrapper.o
+ASM_OBJS = head.o lock.o misc.o kernel-wrapper.o rom_entry.o
 ASM=asm/built-in.o
 
 # Add extra dependency to the kernel wrapper
diff --git a/asm/rom_entry.S b/asm/rom_entry.S
new file mode 100644
index 0000000..26d1b96
--- /dev/null
+++ b/asm/rom_entry.S
@@ -0,0 +1,52 @@
+# IBM_PROLOG_BEGIN_TAG
+# This is an automatically generated prolog.
+#
+# $Source: src/usr/secureboot/base/rom_entry.S $
+#
+# OpenPOWER HostBoot Project
+#
+# COPYRIGHT International Business Machines Corp. 2013,2016
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied. See the License for the specific language governing
+# permissions and limitations under the License.
+#
+# IBM_PROLOG_END_TAG
+
+#.include "kernel/ppcconsts.S"
+
+.section .text
+
+.global call_rom_verify
+.global call_rom_SHA512
+
+call_rom_verify:
+call_rom_SHA512:
+
+call_rom_entry:
+    std %r2, 40(%r1)
+    mflr %r0
+    std %r0, 16(%r1)
+    stdu %r1, -128(%r1)
+    li %r2, 0
+    mtctr %r3
+    mr %r3, %r4
+    mr %r4, %r5
+    mr %r5, %r6
+    mr %r6, %r7
+    mr %r7, %r8
+    bctrl
+    addi %r1, %r1, 128
+    ld %r2, 40(%r1)
+    ld %r0, 16(%r1)
+    mtlr %r0
+    blr
+
-- 
1.9.1