diff options
Diffstat (limited to 'purgatory/arch/ppc64')
| -rw-r--r-- | purgatory/arch/ppc64/Makefile | 28 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/console-ppc64.c | 45 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/crashdump_backup.c | 39 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/hvCall.S | 27 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/hvCall.h | 8 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/misc.S | 197 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/ppc64_asm.h | 16 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/purgatory-ppc64.c | 44 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/purgatory-ppc64.h | 6 | ||||
| -rw-r--r-- | purgatory/arch/ppc64/v2wrap.S | 137 |
10 files changed, 547 insertions, 0 deletions
diff --git a/purgatory/arch/ppc64/Makefile b/purgatory/arch/ppc64/Makefile new file mode 100644 index 0000000..8ca2719 --- /dev/null +++ b/purgatory/arch/ppc64/Makefile @@ -0,0 +1,28 @@ +# +# Purgatory ppc64 +# + +ppc64_PURGATORY_SRCS += purgatory/arch/ppc64/v2wrap.S +ppc64_PURGATORY_SRCS += purgatory/arch/ppc64/hvCall.S +ppc64_PURGATORY_SRCS += purgatory/arch/ppc64/purgatory-ppc64.c +ppc64_PURGATORY_SRCS += purgatory/arch/ppc64/console-ppc64.c +ppc64_PURGATORY_SRCS += purgatory/arch/ppc64/crashdump_backup.c +ppc64_PURGATORY_SRCS += purgatory/arch/ppc64/misc.S + +ppc64_PURGATORY_EXTRA_CFLAGS += -m64 -msoft-float \ + -fno-exceptions +ppc64_PURGATORY_EXTRA_ASFLAGS += -m64 +ifeq ($(SUBARCH),BE) + ppc64_PURGATORY_EXTRA_LDFLAGS += -melf64ppc + ppc64_PURGATORY_EXTRA_CFLAGS += -mcall-aixdesc + ppc64_PURGATORY_EXTRA_ASFLAGS += -mcall-aixdesc +else + ppc64_PURGATORY_EXTRA_LDFLAGS += -melf64lppc + ppc64_PURGATORY_EXTRA_CFLAGS += -mlittle-endian + ppc64_PURGATORY_EXTRA_ASFLAGS += -mlittle-endian +endif + +dist += purgatory/arch/ppc64/Makefile $(ppc64_PURGATORY_SRCS) \ + purgatory/arch/ppc64/hvCall.h \ + purgatory/arch/ppc64/ppc64_asm.h \ + purgatory/arch/ppc64/purgatory-ppc64.h diff --git a/purgatory/arch/ppc64/console-ppc64.c b/purgatory/arch/ppc64/console-ppc64.c new file mode 100644 index 0000000..2403312 --- /dev/null +++ b/purgatory/arch/ppc64/console-ppc64.c @@ -0,0 +1,45 @@ +/* + * kexec: Linux boots Linux + * + * Created by: Mohan Kumar M (mohan@in.ibm.com) + * + * Copyright (C) IBM Corporation, 2005. All rights reserved + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <purgatory.h> +#include "hvCall.h" +#include <byteswap.h> +#include <endian.h> +#include <asm/byteorder.h> + +extern int debug; + +void putchar(int c) +{ + char buff[16] = ""; + unsigned long *lbuf = (unsigned long *)buff; + + if (!debug) /* running on non pseries */ + return; + + if (c == '\n') + putchar('\r'); + + buff[0] = c; + plpar_hcall_norets(H_PUT_TERM_CHAR, 0, 1, + __cpu_to_be64(lbuf[0]), __cpu_to_be64(lbuf[1])); + return; +} diff --git a/purgatory/arch/ppc64/crashdump_backup.c b/purgatory/arch/ppc64/crashdump_backup.c new file mode 100644 index 0000000..7ba5aff --- /dev/null +++ b/purgatory/arch/ppc64/crashdump_backup.c @@ -0,0 +1,39 @@ +/* + * kexec: Linux boots Linux + * + * Created by: Mohan Kumar M (mohan@in.ibm.com) + * + * Copyright (C) IBM Corporation, 2005. All rights reserved + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <stdint.h> +#include <string.h> +#include "../../../kexec/arch/ppc64/crashdump-ppc64.h" + +extern unsigned long backup_start; + +/* Backup first 32KB of memory to backup region reserved by kexec */ +void crashdump_backup_memory(void) +{ + void *dest, *src; + + src = (void *)BACKUP_SRC_START; + + if (backup_start) { + dest = (void *)(backup_start); + memcpy(dest, src, BACKUP_SRC_SIZE); + } +} diff --git a/purgatory/arch/ppc64/hvCall.S b/purgatory/arch/ppc64/hvCall.S new file mode 100644 index 0000000..a96c489 --- /dev/null +++ b/purgatory/arch/ppc64/hvCall.S @@ -0,0 +1,27 @@ +/* + * This file contains the generic function to perform a call to the + * pSeries LPAR hypervisor. + * + * Taken from linux/arch/powerpc/platforms/pseries/hvCall.S + * + * 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; either version + * 2 of the License, or (at your option) any later version. + */ +#include "ppc64_asm.h" + +#define HVSC .long 0x44000022 +.text + .machine ppc64 +.globl DOTSYM(plpar_hcall_norets) +DOTSYM(plpar_hcall_norets): + or 6,6,6 # medium low priority + mfcr 0 + stw 0,8(1) + + HVSC /* invoke the hypervisor */ + + lwz 0,8(1) + mtcrf 0xff,0 + blr /* return r3 = status */ diff --git a/purgatory/arch/ppc64/hvCall.h b/purgatory/arch/ppc64/hvCall.h new file mode 100644 index 0000000..187e24d --- /dev/null +++ b/purgatory/arch/ppc64/hvCall.h @@ -0,0 +1,8 @@ +#ifndef HVCALL_H +#define HVCALL_H + +#define H_PUT_TERM_CHAR 0x58 + +long plpar_hcall_norets(unsigned long opcode, ...); + +#endif diff --git a/purgatory/arch/ppc64/misc.S b/purgatory/arch/ppc64/misc.S new file mode 100644 index 0000000..4ee188d --- /dev/null +++ b/purgatory/arch/ppc64/misc.S @@ -0,0 +1,197 @@ +/* + * This is from linux/arch/powerpc/lib/crtsavres.S: + * + * Special support for eabi and SVR4 + * + * Copyright (C) 1995, 1996, 1998, 2000, 2001 Free Software Foundation, Inc. + * Copyright 2008 Freescale Semiconductor, Inc. + * Written By Michael Meissner + * + * Based on gcc/config/rs6000/crtsavres.asm from gcc + * 64 bit additions from reading the PPC elf64abi document. + * + * This file 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; either version 2, or (at your option) any + * later version. + * + * In addition to the permissions in the GNU General Public License, the + * Free Software Foundation gives you unlimited permission to link the + * compiled version of this file with other programs, and to distribute + * those programs without any restriction coming from the use of this + * file. (The General Public License restrictions do apply in other + * respects; for example, they cover modification of the file, and + * distribution when not linked into another program.) + * + * This file 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + * As a special exception, if you link this library with files + * compiled with GCC to produce an executable, this does not cause + * the resulting executable to be covered by the GNU General Public License. + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + */ + +#define r0 0 +#define r1 1 +#define r2 2 +#define r3 3 +#define r4 4 +#define r5 5 +#define r6 6 +#define r7 7 +#define r8 8 +#define r9 9 +#define r10 10 +#define r11 11 +#define r12 12 +#define r13 13 +#define r14 14 +#define r15 15 +#define r16 16 +#define r17 17 +#define r18 18 +#define r19 19 +#define r20 20 +#define r21 21 +#define r22 22 +#define r23 23 +#define r24 24 +#define r25 25 +#define r26 26 +#define r27 27 +#define r28 28 +#define r29 29 +#define r30 30 +#define r31 31 + + .text + +.globl _savegpr0_14 +_savegpr0_14: + std r14,-144(r1) +.globl _savegpr0_15 +_savegpr0_15: + std r15,-136(r1) +.globl _savegpr0_16 +_savegpr0_16: + std r16,-128(r1) +.globl _savegpr0_17 +_savegpr0_17: + std r17,-120(r1) +.globl _savegpr0_18 +_savegpr0_18: + std r18,-112(r1) +.globl _savegpr0_19 +_savegpr0_19: + std r19,-104(r1) +.globl _savegpr0_20 +_savegpr0_20: + std r20,-96(r1) +.globl _savegpr0_21 +_savegpr0_21: + std r21,-88(r1) +.globl _savegpr0_22 +_savegpr0_22: + std r22,-80(r1) +.globl _savegpr0_23 +_savegpr0_23: + std r23,-72(r1) +.globl _savegpr0_24 +_savegpr0_24: + std r24,-64(r1) +.globl _savegpr0_25 +_savegpr0_25: + std r25,-56(r1) +.globl _savegpr0_26 +_savegpr0_26: + std r26,-48(r1) +.globl _savegpr0_27 +_savegpr0_27: + std r27,-40(r1) +.globl _savegpr0_28 +_savegpr0_28: + std r28,-32(r1) +.globl _savegpr0_29 +_savegpr0_29: + std r29,-24(r1) +.globl _savegpr0_30 +_savegpr0_30: + std r30,-16(r1) +.globl _savegpr0_31 +_savegpr0_31: + std r31,-8(r1) + std r0,16(r1) + blr + +.globl _restgpr0_14 +_restgpr0_14: + ld r14,-144(r1) +.globl _restgpr0_15 +_restgpr0_15: + ld r15,-136(r1) +.globl _restgpr0_16 +_restgpr0_16: + ld r16,-128(r1) +.globl _restgpr0_17 +_restgpr0_17: + ld r17,-120(r1) +.globl _restgpr0_18 +_restgpr0_18: + ld r18,-112(r1) +.globl _restgpr0_19 +_restgpr0_19: + ld r19,-104(r1) +.globl _restgpr0_20 +_restgpr0_20: + ld r20,-96(r1) +.globl _restgpr0_21 +_restgpr0_21: + ld r21,-88(r1) +.globl _restgpr0_22 +_restgpr0_22: + ld r22,-80(r1) +.globl _restgpr0_23 +_restgpr0_23: + ld r23,-72(r1) +.globl _restgpr0_24 +_restgpr0_24: + ld r24,-64(r1) +.globl _restgpr0_25 +_restgpr0_25: + ld r25,-56(r1) +.globl _restgpr0_26 +_restgpr0_26: + ld r26,-48(r1) +.globl _restgpr0_27 +_restgpr0_27: + ld r27,-40(r1) +.globl _restgpr0_28 +_restgpr0_28: + ld r28,-32(r1) +.globl _restgpr0_29 +_restgpr0_29: + ld r0,16(r1) + ld r29,-24(r1) + mtlr r0 + ld r30,-16(r1) + ld r31,-8(r1) + blr + +.globl _restgpr0_30 +_restgpr0_30: + ld r30,-16(r1) +.globl _restgpr0_31 +_restgpr0_31: + ld r0,16(r1) + ld r31,-8(r1) + mtlr r0 + blr diff --git a/purgatory/arch/ppc64/ppc64_asm.h b/purgatory/arch/ppc64/ppc64_asm.h new file mode 100644 index 0000000..b8746fd --- /dev/null +++ b/purgatory/arch/ppc64/ppc64_asm.h @@ -0,0 +1,16 @@ +/* + * ppc64_asm.h - common defines for PPC64 assembly parts + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +/* + * ABIv1 requires dot symbol while ABIv2 does not. + */ +#if defined(_CALL_ELF) && _CALL_ELF == 2 +#define DOTSYM(a) a +#else +#define GLUE(a,b) a##b +#define DOTSYM(a) GLUE(.,a) +#endif diff --git a/purgatory/arch/ppc64/purgatory-ppc64.c b/purgatory/arch/ppc64/purgatory-ppc64.c new file mode 100644 index 0000000..7248ac8 --- /dev/null +++ b/purgatory/arch/ppc64/purgatory-ppc64.c @@ -0,0 +1,44 @@ +/* + * kexec: Linux boots Linux + * + * Created by: Mohan Kumar M (mohan@in.ibm.com) + * + * Copyright (C) IBM Corporation, 2005. All rights reserved + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <purgatory.h> +#include "purgatory-ppc64.h" + +unsigned int panic_kernel = 0; +unsigned long backup_start = 0; +unsigned long stack = 0; +unsigned long dt_offset = 0; +unsigned long my_toc = 0; +unsigned long kernel = 0; +unsigned int debug = 0; +unsigned long opal_base = 0; +unsigned long opal_entry = 0; + +void setup_arch(void) +{ + return; +} + +void post_verification_setup_arch(void) +{ + if (panic_kernel) + crashdump_backup_memory(); +} diff --git a/purgatory/arch/ppc64/purgatory-ppc64.h b/purgatory/arch/ppc64/purgatory-ppc64.h new file mode 100644 index 0000000..52eaf43 --- /dev/null +++ b/purgatory/arch/ppc64/purgatory-ppc64.h @@ -0,0 +1,6 @@ +#ifndef PURGATORY_PPC64_H +#define PURGATORY_PPC64_H + +void crashdump_backup_memory(void); + +#endif /* PURGATORY_PPC64_H */ diff --git a/purgatory/arch/ppc64/v2wrap.S b/purgatory/arch/ppc64/v2wrap.S new file mode 100644 index 0000000..3534080 --- /dev/null +++ b/purgatory/arch/ppc64/v2wrap.S @@ -0,0 +1,137 @@ +# +# kexec: Linux boots Linux +# +# Copyright (C) 2004 - 2005, Milton D Miller II, IBM Corporation +# Copyright (C) 2006, Mohan Kumar M (mohan@in.ibm.com), IBM Corporation +# +# 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. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +# + +#include "ppc64_asm.h" + +# v2wrap.S +# a wrapper to call purgatory code to backup first +# 32kB of first kernel into the backup region +# reserved by kexec-tools. +# Invokes ppc64 kernel with the expected arguments +# of kernel(device-tree, phys-offset, 0) + +# +# calling convention: +# r3 = physical number of this cpu (all cpus) +# r4 = address of this chunk (master only) +# master enters at purgatory_start (aka first byte of this chunk) +# slaves (additional cpus), if any, enter a copy of the +# first 0x100 bytes of this code relocated to 0x0 +# +# in other words, +# a copy of the first 0x100 bytes of this code is copied to 0 +# and the slaves are sent to address 0x60 +# with r3 = their physical cpu number. + +#define LOADADDR(rn,name) \ + lis rn,name##@highest; \ + ori rn,rn,name##@higher; \ + rldicr rn,rn,32,31; \ + oris rn,rn,name##@h; \ + ori rn,rn,name##@l + + .machine ppc64 + .align 8 + .globl purgatory_start +purgatory_start: b master + .org purgatory_start + 0x5c # ABI: possible run_at_load flag at 0x5c + .globl run_at_load +run_at_load: + .long 0 + .size run_at_load, . - run_at_load + .org purgatory_start + 0x60 # ABI: slaves start at 60 with r3=phys +slave: b $ + .org purgatory_start + 0x100 # ABI: end of copied region + .size purgatory_start, . - purgatory_start + +# +# The above 0x100 bytes at purgatory_start are replaced with the +# code from the kernel (or next stage) by kexec/arch/ppc64/kexec-elf-ppc64.c +# + +master: + or 1,1,1 # low priority to let other threads catchup + isync + mr 17,3 # save cpu id to r17 + mr 15,4 # save physical address in reg15 + + LOADADDR(6,my_toc) + ld 2,0(6) #setup toc + + LOADADDR(6,stack) + ld 1,0(6) #setup stack + + subi 1,1,112 + bl DOTSYM(purgatory) + nop + + or 3,3,3 # ok now to high priority, lets boot + lis 6,0x1 + mtctr 6 # delay a bit for slaves to catch up +83: bdnz 83b # before we overwrite 0-100 again + + LOADADDR(16, dt_offset) + ld 3,0(16) # load device-tree address + mr 16,3 # save dt address in reg16 +#ifdef __BIG_ENDIAN__ + lwz 6,20(3) # fetch version number +#else + li 4,20 + lwbrx 6,3,4 # fetch BE version number +#endif + cmpwi 0,6,2 # v2 ? + blt 80f +#ifdef __BIG_ENDIAN__ + stw 17,28(3) # save my cpu number as boot_cpu_phys +#else + li 4,28 + stwbrx 17,3,4 # Store my cpu as BE value +#endif +80: + LOADADDR(6,opal_base) # For OPAL early debug + ld 8,0(6) # load the OPAL base address in r8 + LOADADDR(6,opal_entry) # For OPAL early debug + ld 9,0(6) # load the OPAL entry address in r9 + LOADADDR(6,kernel) + ld 4,0(6) # load the kernel address + LOADADDR(6,run_at_load) # the load flag + lwz 7,0(6) # possibly patched by kexec-elf-ppc64 + stw 7,0x5c(4) # and patch it into the kernel + mr 3,16 # restore dt address + + mfmsr 5 + andi. 10,5,1 # test MSR_LE + bne little_endian + + li 5,0 # r5 will be 0 for kernel + mtctr 4 # prepare branch to + bctr # start kernel + +little_endian: # book3s-only + mtsrr0 4 # prepare branch to + + clrrdi 5,5,1 # clear MSR_LE + mtsrr1 5 + + li 5,0 # r5 will be 0 for kernel + + # skip cache flush, do we care? + + rfid # update MSR and start kernel |