Hostboot Bootloader Infrastructure

New and changed code to provide bootloader infrastructure.
Changes to build bootloader and create the image file.

Change-Id: Ie400f0ca6954b86e275fd68c9462f8d18eeec98a
RTC:127211
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/22856
Tested-by: Jenkins Server
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

5 files changed, 370 insertions, 0 deletions

diff --git a/src/bootloader/bl_builtins.C b/src/bootloader/bl_builtins.C
new file mode 100644
index 000000000..2e89c55b7
--- /dev/null
+++ b/src/bootloader/bl_builtins.C
@@ -0,0 +1,34 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/bootloader/bl_builtins.C $                                */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015,2016                        */
+/* [+] 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                                                     */
+#include <bootloader/bootloader.H>
+
+#define bl_builtins_C
+
+#include <arch/ppc.H>
+
+#include <../libc++/builtins.C>
+
+#undef bl_builtins_C
+
diff --git a/src/bootloader/bl_pnor_ecc.C b/src/bootloader/bl_pnor_ecc.C
new file mode 100644
index 000000000..df7e9d6ee
--- /dev/null
+++ b/src/bootloader/bl_pnor_ecc.C
@@ -0,0 +1,37 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/bootloader/bl_pnor_ecc.C $                                */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015,2016                        */
+/* [+] 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                                                     */
+#include <bootloader/bootloader.H>
+
+#define bl_pnor_ecc_C
+
+#include <stdio.h>
+#include <endian.h>
+
+#include <usr/pnor/ecc.H>
+
+#include <../usr/pnor/ecc.C>
+
+#undef bl_pnor_ecc_C
+
diff --git a/src/bootloader/bl_start.S b/src/bootloader/bl_start.S
new file mode 100644
index 000000000..9f190b11f
--- /dev/null
+++ b/src/bootloader/bl_start.S
@@ -0,0 +1,182 @@
+# IBM_PROLOG_BEGIN_TAG
+# This is an automatically generated prolog.
+#
+# $Source: src/bootloader/bl_start.S $
+#
+# OpenPOWER HostBoot Project
+#
+# Contributors Listed Below - COPYRIGHT 2015,2016
+# [+] 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
+
+.include "kernel/ppcconsts.S"
+
+.section .text.bootloaderasm
+
+.global _start
+_start:
+    ;// Set thread priority high.
+    or 2,2,2
+
+    ;// Clear MSR[TA] (bit 1) and enable MSR[ME] (bit 51).
+    mfmsr r2
+    rldicl r2,r2,1,1    ;// Clear bit 1 - result [1-63,0]
+    rotrdi r2,r2,1      ;// Rotate right 1 - result [0,63]
+    ori r2,r2,4096      ;// Set bit 51
+    ;// Set up SRR0 / SRR1 to enable new MSR.
+    mtsrr1 r2
+    li r2, _start_postmsr@l
+    mtsrr0 r2
+    b _start_postmsr
+
+_start_postmsr:
+
+    ;// Determine if this is the first thread.
+    li r4, 2
+    ;// Read spinlock value.
+    lis r2, kernel_other_thread_spinlock@h
+    ori r2, r2, kernel_other_thread_spinlock@l
+    lwsync
+1:
+    ldarx r3, 0, r2
+    cmpwi r3, 0 ;// Non-zero means this thread wasn't first.
+    bnel cr0, _other_thread_error ;// Handle having multiple threads started
+    stdcx. r4, 0, r2    ;// Attempt to store 2.
+    bne 1b ;// Loop until sucessful at stwcx.
+    isync
+
+    b _main
+
+
+/* @TODO RTC:133821 might not be needed
+    ;// Relocate code
+    bl pre_relocate     ;// fill LR with address
+pre_relocate:
+    mflr r2
+    lis r1,0x0010
+    cmpl cr0,r2,r1              ;// Check LR is less than 1MB
+    blt finished_relocate       ;// No need to relocate if less than 1MB
+
+    ;// Get addresses for relocation.
+    ;// Write address in r5
+    ;// Read address in r1
+    li r5,0
+    lis r1, -1  ;// fill r1 with ffff..ff0000
+
+    and r1,r1,r2 ;// and with pre_relocate's address from r2 to get start of
+                 ;// rom section.
+
+    ;// Update LR to low address.
+    clrldi r2,r2,48  ;// Equiv to ~(0x0FFFF)
+    mtlr 2
+
+    ;// Moving 1MB , so load r2 with (1MB / 8 bytes per word)
+    lis r2, 0x2
+    mtctr r2
+relocate_loop:
+    ;// The dcbst/sync/icbi/isync sequence comes from PowerISA
+    ld r4, 0(r1)
+    std r4, 0(r5)
+    dcbst 0,r5
+    sync
+    icbi 0,r5
+    isync
+    addi r1,r1,8
+    addi r5,r5,8
+    bdnz+ relocate_loop
+
+    ;// Now that we've relocated, erase exception prefix.
+    mfmsr r11
+
+    rldicl r11,r11,57,1  ;// Erase bit 6 ( equiv to r11 & ~(0x40))
+    rotldi r11,r11,7
+
+    mtmsr r11
+
+    ;// Jump to low address.
+    blr
+
+finished_relocate:
+    ;// Jump to main.
+    b _main
+@TODO RTC:133821 might not be needed */
+
+
+;// _main:
+;//     Set up stack and TOC and call kernel's main.
+_main:
+    ;// Set up initial TOC Base
+    lis r2, main@h
+    ori r2, r2, main@l
+    ld r2,8(r2)
+
+    ;// Set up initial stack, space for 8 double-words
+    lis r1, kernel_stack@h
+    ori r1, r1, kernel_stack@l
+    addi r1, r1, 16320
+
+    ;// Call main.
+    bl main
+_main_loop:
+    b _main_loop
+
+
+;// @fn _other_thread_error:
+;//     Used for threads other than first to handle this unexpected condition.
+_other_thread_error:
+    ;// Read spinlock value.
+    lis r2, kernel_other_thread_spinlock@h
+    ori r2, r2, kernel_other_thread_spinlock@l
+1:
+    ld r3, 0(r2)
+    ;// Loop until value is 1...
+    cmpi cr0, r3, 1
+    beq task_end_stub ;// End the multiple threads
+    or 1,1,1 ;// Lower thread priority.
+    b 1b
+
+
+    ;// @fn task_end_stub
+    ;// Stub to call a TASK_END syscall in the event that a task 'returns' from
+    ;// its entry point.  We cannot call task_end() directly because profiling
+    ;// inserts garbage code into the task_end C function.
+.global task_end_stub
+task_end_stub:
+    mr r4, r3 ;// Move current rc (r3) to status value (r4)
+    li r3, 2  ;// TASK_END -> r3 (syscall number)
+    sc
+
+
+.section .data
+
+    .balign 1024
+kernel_stack:
+    .space 4*1024
+
+    .balign 8
+.global data_sandbox
+data_sandbox:
+    .space 64
+
+.global kernel_other_thread_spinlock
+kernel_other_thread_spinlock:
+    .space 8
+
+.global g_blScratchSpace
+g_blScratchSpace:
+    .space 8
+
diff --git a/src/bootloader/bootloader.C b/src/bootloader/bootloader.C
new file mode 100644
index 000000000..462217d76
--- /dev/null
+++ b/src/bootloader/bootloader.C
@@ -0,0 +1,84 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/bootloader/bootloader.C $                                 */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015,2016                        */
+/* [+] 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                                                     */
+#include <stdint.h>
+#include <bootloader/bootloader.H>
+#include <util/singleton.H>
+#include <kernel/cpu.H>
+
+#include <kernel/intmsghandler.H> // @TODO RTC:133821 might not be needed long-term
+
+#include <usr/pnor/ecc.H>
+
+#include <stdlib.h>
+
+extern uint64_t kernel_other_thread_spinlock;
+extern uint32_t data_sandbox[16]; // @TODO RTC:133821 temporary bringup
+
+namespace Bootloader{
+    extern "C"
+    int main()
+    {
+        // cppBootstrap(); @TODO RTC:133821 might not be needed long-term
+        // cv_blScratchSpace = ??? @TODO RTC:133821
+
+        // @TODO RTC:134064 Get location of HB base code in PNOR from TOC
+
+        // @TODO RTC:133821 Copy HB base code from PNOR to 0x200000
+
+        // Remove ECC from HB base code at 0x200000 and store result at 0x300000
+        PNOR::ECC::eccStatus rc = PNOR::ECC::CLEAN;
+//        PNOR::ECC::removeECC(reinterpret_cast<uint8_t*>(0x200000),
+//                             reinterpret_cast<uint8_t*>(0x300000),
+//                             0x100000); // @TODO RTC:133821 determine size
+
+        if (rc != PNOR::ECC::UNCORRECTABLE)
+        {
+//        memcpy(reinterpret_cast<void*>(0x300000),
+//               reinterpret_cast<void*>(0),
+//               0x100000); // @TODO RTC:133821 determine size // replace with asm cache inhibited instructions
+        }
+
+        // Ready to let the other CPUs go. @TODO RTC:133821 actually need to start relocated HB base code
+        lwsync();
+        kernel_other_thread_spinlock = 1;
+
+        data_sandbox[8] = 0x12345678; // @TODO RTC:133821 temporary bringup
+
+        MAGIC_INSTRUCTION(MAGIC_BREAK); // @TODO RTC:133821 temporary bringup
+
+        while(1); // @TODO
+        task_end_stub(); // @TODO
+        return 0;
+    }
+
+    void handleMMIO(uint64_t i_srcAddr,
+                    uint64_t i_destAddr,
+                    uint32_t i_size,
+                    MMIOLoadStoreSizes i_ld_st_size)
+    {
+        // @TODO RTC:133821
+    }
+} // end namespace Bootloader
+
diff --git a/src/bootloader/makefile b/src/bootloader/makefile
new file mode 100644
index 000000000..cf5fe04a6
--- /dev/null
+++ b/src/bootloader/makefile
@@ -0,0 +1,33 @@
+# IBM_PROLOG_BEGIN_TAG
+# This is an automatically generated prolog.
+#
+# $Source: src/bootloader/makefile $
+#
+# OpenPOWER HostBoot Project
+#
+# Contributors Listed Below - COPYRIGHT 2015,2016
+# [+] 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
+ROOTPATH = ../..
+
+OBJS += bl_start.o
+OBJS += bootloader.o
+OBJS += bl_pnor_ecc.o
+OBJS += bl_builtins.o
+
+include ${ROOTPATH}/config.mk
+