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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
/*
* Compiled KERNBASE location and the kernel load address
*/
.globl kernbase
.set kernbase, KERNBASE
Quantities stored on the stack on ppc64 tend to be twice as large as on ppc32, so make the early stack correspondingly twice as big.
2011-06-03 00:11:13 +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
/*
* Globals
*/
.data
.align 4
GLOBAL(tmpstk)
.space TMPSTKSZ
GLOBAL(esym)
.llong 0 /* end of symbol table */
#define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */
GLOBAL(intrnames)
.space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2
- Remove the eintrcnt/eintrnames usage and introduce the concept of sintrcnt/sintrnames which are symbols containing the size of the 2 tables. - For amd64/i386 remove the storage of intr* stuff from assembly files. This area can be widely improved by applying the same to other architectures and likely finding an unified approach among them and move the whole code to be MI. More work in this area is expected to happen fairly soon. No MFC is previewed for this patch. Tested by: pluknet Reviewed by: jhb Approved by: re (kib)
2011-07-18 15:19:40 +00:00
GLOBAL(sintrnames)
On 64 bit architectures size_t is 8 bytes, thus it should use an 8 bytes storage. Fix the sintrcnt/sintrnames specification. No MFC is previewed for this patch. Reported, reviewed and tested by: marcel Approved by: re (kib)
2011-07-19 12:41:57 +00:00
.quad INTRCNT_COUNT * (MAXCOMLEN + 1) * 2
- Remove the eintrcnt/eintrnames usage and introduce the concept of sintrcnt/sintrnames which are symbols containing the size of the 2 tables. - For amd64/i386 remove the storage of intr* stuff from assembly files. This area can be widely improved by applying the same to other architectures and likely finding an unified approach among them and move the whole code to be MI. More work in this area is expected to happen fairly soon. No MFC is previewed for this patch. Tested by: pluknet Reviewed by: jhb Approved by: re (kib)
2011-07-18 15:19:40 +00:00
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
GLOBAL(intrcnt)
.space INTRCNT_COUNT * 4 * 2
- Remove the eintrcnt/eintrnames usage and introduce the concept of sintrcnt/sintrnames which are symbols containing the size of the 2 tables. - For amd64/i386 remove the storage of intr* stuff from assembly files. This area can be widely improved by applying the same to other architectures and likely finding an unified approach among them and move the whole code to be MI. More work in this area is expected to happen fairly soon. No MFC is previewed for this patch. Tested by: pluknet Reviewed by: jhb Approved by: re (kib)
2011-07-18 15:19:40 +00:00
GLOBAL(sintrcnt)
On 64 bit architectures size_t is 8 bytes, thus it should use an 8 bytes storage. Fix the sintrcnt/sintrnames specification. No MFC is previewed for this patch. Reported, reviewed and tested by: marcel Approved by: re (kib)
2011-07-19 12:41:57 +00:00
.quad INTRCNT_COUNT * 4 * 2
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!
*/
.text
ASENTRY(__start)
li 8,0
li 9,0x100
mtctr 9
1:
dcbf 0,8
icbi 0,8
addi 8,8,0x20
bdnz 1b
sync
isync
/* Save the argument pointer and length */
mr 20,6
mr 21,7
lis 8,openfirmware_entry@ha
std 5,openfirmware_entry@l(8) /* save client interface handler */
/* Set up the stack pointer */
lis 1,(tmpstk+TMPSTKSZ-48)@ha
addi 1,1,(tmpstk+TMPSTKSZ-48)@l
/* Set up the TOC pointer */
lis 2,tocbase@ha
ld 2,tocbase@l(2)
mfmsr 0
lis 9,ofmsr@ha
stdu 0,ofmsr@l(9)
mfsprg0 0 /* save SPRG0-3 */
std 0,8(9) /* ofmsr[1] = sprg0 */
mfsprg1 0
std 0,16(9) /* ofmsr[2] = sprg1 */
mfsprg2 0
std 0,24(9) /* ofmsr[3] = sprg2 */
mfsprg3 0
std 0,32(9) /* ofmsr[4] = sprg3 */
/* Switch to 64-bit mode */
mfmsr 9
li 8,1
insrdi 9,8,1,0
mtmsrd 9
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 OF_initial_setup
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
lis 4,end@ha
addi 4,4,end@l
mr 5,4
lis 3,kernbase@ha
addi 3,3,kernbase@l
/* Restore the argument pointer and length */
mr 6,20
mr 7,21
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
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
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
/*
* PPC64 ABI TOC base
*/
.align 3
.globl tocbase
tocbase:
.llong .TOC.@tocbase
/*
* 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.
*/
ASENTRY(setfault)
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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