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freebsd-nq/sys/powerpc/aim/locore64.S

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MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
/* $FreeBSD$ */
/* $NetBSD: locore.S,v 1.24 2000/05/31 05:09:17 thorpej Exp $ */
/*-
* Copyright (C) 2001 Benno Rice
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "assym.s"
#include <sys/syscall.h>
#include <machine/trap.h>
#include <machine/param.h>
#include <machine/spr.h>
#include <machine/asm.h>
/* Locate the per-CPU data structure */
#define GET_CPUINFO(r) \
mfsprg0 r
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
#define GET_TOCBASE(r) \
li r,TRAP_TOCBASE; /* Magic address for TOC */ \
ld r,0(r)
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
/* Glue for linker script */
.globl kernbase
.set kernbase, KERNBASE
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
/*
* Globals
*/
.data
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
.align 3
GLOBAL(__startkernel)
.llong begin
GLOBAL(__endkernel)
.llong end
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
.align 4
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
#define TMPSTKSZ 16384 /* 16K temporary stack */
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
GLOBAL(tmpstk)
.space TMPSTKSZ
Use TOC to look up all kernel globals on powerpc64 instead of doing the non-relocatable lis @ha, ori @l dance and hoping they are below 4 GB. MFC after: 2 months
2015-01-18 20:00:33 +00:00
TOC_ENTRY(tmpstk)
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
.text
.globl btext
btext:
/*
* This symbol is here for the benefit of kvm_mkdb, and is supposed to
* mark the start of kernel text.
*/
.globl kernel_text
kernel_text:
/*
* Startup entry. Note, this must be the first thing in the text
* segment!
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
*
* Calling convention:
* r3: Flattened Device Tree pointer (or zero)
* r4: ignored
* r5: OF client interface pointer (or zero)
* r6: Loader metadata pointer (or zero)
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
*/
.text
This commit adds profiling support for powerpc64. Now we can do application profiling and kernel profiling. To enable kernel profiling one has to build kgmon(8). I will enable the build once I managed to build and test powerpc (32-bit) kernels with profiling support. - add a powerpc64 PROF_PROLOGUE for _mcount. - add macros to avoid adding the PROF_PROLOGUE in certain assembly entries. - apply these macros where needed. - add size information to the MCOUNT function. MFC after: 3 weeks, together with r230291
2012-01-20 22:34:19 +00:00
ASENTRY_NOPROF(__start)
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
/* Set up the TOC pointer */
b 0f
.align 3
0: nop
bl 1f
Add some initial infrastructure for relocating the kernel in place. MFC after: 2 months Differential revision: D1554
2015-01-19 17:58:01 +00:00
.llong __tocbase + 0x8000 - .
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
1: mflr %r2
Add some initial infrastructure for relocating the kernel in place. MFC after: 2 months Differential revision: D1554
2015-01-19 17:58:01 +00:00
ld %r1,0(%r2)
add %r2,%r1,%r2
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
Make sure to relocate tmpstk with everything else and avoid processing non-relative relocations that the UART code makes for absent modules.
2015-01-21 19:09:15 +00:00
/* Get load offset */
ld %r31,-0x8000(%r2) /* First TOC entry is TOC base */
subf %r31,%r31,%r2 /* Subtract from real TOC base to get base */
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
/* Set up the stack pointer */
Use TOC to look up all kernel globals on powerpc64 instead of doing the non-relocatable lis @ha, ori @l dance and hoping they are below 4 GB. MFC after: 2 months
2015-01-18 20:00:33 +00:00
ld %r1,TOC_REF(tmpstk)(%r2)
Add some initial infrastructure for relocating the kernel in place. MFC after: 2 months Differential revision: D1554
2015-01-19 17:58:01 +00:00
addi %r1,%r1,TMPSTKSZ-96
Make sure to relocate tmpstk with everything else and avoid processing non-relative relocations that the UART code makes for absent modules.
2015-01-21 19:09:15 +00:00
add %r1,%r1,%r31
Add some initial infrastructure for relocating the kernel in place. MFC after: 2 months Differential revision: D1554
2015-01-19 17:58:01 +00:00
/* Relocate kernel */
std %r3,48(%r1)
std %r4,56(%r1)
std %r5,64(%r1)
std %r6,72(%r1)
bl 1f
.llong _DYNAMIC-.
1: mflr %r3
ld %r4,0(%r3)
add %r3,%r4,%r3
Make sure to relocate tmpstk with everything else and avoid processing non-relative relocations that the UART code makes for absent modules.
2015-01-21 19:09:15 +00:00
mr %r4,%r31
Add some initial infrastructure for relocating the kernel in place. MFC after: 2 months Differential revision: D1554
2015-01-19 17:58:01 +00:00
bl elf_reloc_self
nop
ld %r3,48(%r1)
ld %r4,56(%r1)
ld %r5,64(%r1)
ld %r6,72(%r1)
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
/* Switch to 64-bit mode */
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
mfmsr %r9
li %r8,1
insrdi %r9,%r8,1,0
mtmsrd %r9
We should have an isync after switching MSR[SF] in bootstrap. Submitted by: Mark Millard MFC after: 3 days
2014-09-23 04:13:21 +00:00
isync
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
/* Begin CPU init */
mr %r4,%r2 /* Replace ignored r4 with tocbase for trap handlers */
Turn off default generation of userland dot symbols on powerpc64 now that we have a binutils that supports it. Kernel dot symbols remain on to assist DDB.
2011-02-18 21:44:53 +00:00
bl powerpc_init
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
nop
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
/* Set stack pointer to new value and branch to mi_startup */
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
mr %r1, %r3
li %r3, 0
std %r3, 0(%r1)
Turn off default generation of userland dot symbols on powerpc64 now that we have a binutils that supports it. Kernel dot symbols remain on to assist DDB.
2011-02-18 21:44:53 +00:00
bl mi_startup
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
nop
Refactor PowerPC (especially AIM) init sequence to be less baroque. MFC after: 2 months
2015-01-18 18:32:43 +00:00
/* If this returns (it won't), go back to firmware */
Turn off default generation of userland dot symbols on powerpc64 now that we have a binutils that supports it. Kernel dot symbols remain on to assist DDB.
2011-02-18 21:44:53 +00:00
b OF_exit
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
nop
/*
* int setfault()
*
* Similar to setjmp to setup for handling faults on accesses to user memory.
* Any routine using this may only call bcopy, either the form below,
* or the (currently used) C code optimized, so it doesn't use any non-volatile
* registers.
*/
This commit adds profiling support for powerpc64. Now we can do application profiling and kernel profiling. To enable kernel profiling one has to build kgmon(8). I will enable the build once I managed to build and test powerpc (32-bit) kernels with profiling support. - add a powerpc64 PROF_PROLOGUE for _mcount. - add macros to avoid adding the PROF_PROLOGUE in certain assembly entries. - apply these macros where needed. - add size information to the MCOUNT function. MFC after: 3 weeks, together with r230291
2012-01-20 22:34:19 +00:00
ASENTRY_NOPROF(setfault)
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
mflr 0
mfcr 12
mfsprg 4,0
Use the ABI-mandated thread pointer register (r2 for ppc32, r13 for ppc64) instead of a PCPU field for curthread. This averts a race on SMP systems with a high interrupt rate where the thread looking up the value of curthread could be preempted and migrated between obtaining the PCPU pointer and reading the value of pc_curthread, resulting in curthread being observed to be the current thread on the thread's original CPU. This played merry havoc with the system, in particular with mutexes. Many thanks to jhb for helping me work this one out. Note that Book-E is in principle susceptible to the same problem, but has not been modified yet due to lack of Book-E hardware. MFC after: 2 weeks
2011-06-23 22:21:28 +00:00
ld 4,TD_PCB(13) /* curthread = r13 */
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
std 3,PCB_ONFAULT(4)
std 0,0(3)
std 1,8(3)
std 2,16(3)
std %r12,24(%r3) /* Save the non-volatile GP regs. */
std %r13,24+1*8(%r3)
std %r14,24+2*8(%r3)
std %r15,24+3*8(%r3)
std %r16,24+4*8(%r3)
std %r17,24+5*8(%r3)
std %r18,24+6*8(%r3)
std %r19,24+7*8(%r3)
std %r20,24+8*8(%r3)
std %r21,24+9*8(%r3)
std %r22,24+10*8(%r3)
std %r23,24+11*8(%r3)
std %r24,24+12*8(%r3)
std %r25,24+13*8(%r3)
std %r26,24+14*8(%r3)
std %r27,24+15*8(%r3)
std %r28,24+16*8(%r3)
std %r29,24+17*8(%r3)
std %r30,24+18*8(%r3)
std %r31,24+19*8(%r3)
xor 3,3,3
blr
#include <powerpc/aim/trap_subr64.S>
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