asm: add Hostboot rom_entry.S

This adds the Hostboot rom_entry.S used to jump into the verification code copied to RAM.
https://github.com/open-power/hostboot/blob/master/src/usr/secureboot/base/rom_entry.S

Signed-off-by: Claudio Carvalho <cclaudio@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/asm/rom_entry.S b/asm/rom_entry.S
new file mode 100644
index 00000000..71f7462b
--- /dev/null
+++ b/asm/rom_entry.S
@@ -0,0 +1,51 @@
+# 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. 2013,2014
+#
+# 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
+