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# IBM_PROLOG_BEGIN_TAG
# This is an automatically generated prolog.
#
# $Source: src/securerom/branchtable.S $
#
# OpenPOWER HostBoot Project
#
# Contributors Listed Below - COPYRIGHT 2016,2017
# [+] International Business Machines Corp.
#
#
# 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
#****************************************************************************
#* branch table - a more stable location for software entering rom code
#****************************************************************************
# adr function
# 0 instruction_start
# 2 .SHA512_Init
# 4 .SHA512_Update
# 6 .SHA512_Final
# 8 .SHA512_Hash
# A .ec_verify
# C .ROM_verify
# 100 rom_sreset
branchtable:
.section ".branchtable","ax"
.globl _instruction_start
_instruction_start:
b instruction_start
nop
.globl _SHA512_Init
_SHA512_Init:
li r0, .L.SHA512_Init@l
b springboard
.globl _SHA512_Update
_SHA512_Update:
li r0, .L.SHA512_Update@l
b springboard
.globl _SHA512_Final
_SHA512_Final:
li r0, .L.SHA512_Final@l
b springboard
.globl _SHA512_Hash
_SHA512_Hash:
li r0, .L.SHA512_Hash@l
b springboard
.globl _ec_verify
_ec_verify:
li r0, .L.ec_verify@l
b springboard
.globl _ROM_verify
_ROM_verify:
li r0, .L.ROM_verify@l
b springboard
#define CFAR 28
springboard:
b boingboing
boingboing:
mfspr r2, CFAR // get address of springboard
addi r2, r2, _instruction_start-springboard // base address
add r0, r0, r2 // calculate entry relative
addi r2, r2, 0x4000 //TOC+0x8000 part 1
addi r2, r2, (__toc_start+0x4000)@l //TOC+0x8000 part 2
mtctr r0
bctr // jump
# could put other assembly ocde routines here to conserver ROM space
# including the sreset routine
# need to align on bootrombase+0x100 !!!
.org .branchtable+0x100
.globl _rom_sreset
_rom_sreset:
li r0, rom_sreset@l
b springboard
nop
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