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freebsd-dev/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
/* $FreeBSD$ */
/*-
Remove dead code and dead comments, most notably the implemenation of the now-obsolete setfault(). No NetBSD code exists in the AIM locore files, so update the copyrights there.
2016-01-10 18:00:01 +00:00
* Copyright (C) 2010-2016 Nathan Whitehorn
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
* 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.
*
Remove dead code and dead comments, most notably the implemenation of the now-obsolete setfault(). No NetBSD code exists in the AIM locore files, so update the copyrights there.
2016-01-10 18:00:01 +00:00
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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
* 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.
*
Remove dead code and dead comments, most notably the implemenation of the now-obsolete setfault(). No NetBSD code exists in the AIM locore files, so update the copyrights there.
2016-01-10 18:00:01 +00:00
* $FreeBSD$
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
*/
#include "assym.s"
#include <sys/syscall.h>
#include <machine/trap.h>
#include <machine/param.h>
#include <machine/spr.h>
#include <machine/asm.h>
Make ELFv2 powerpc64 kernels build and run. Loader support will come in a separate commit.
2015-11-29 07:16:08 +00:00
#ifdef _CALL_ELF
.abiversion _CALL_ELF
#endif
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)
Add support for 64-bit PowerPC kernels to be directly loaded by kexec, which is used as the bootloader on a number of PPC64 platforms. This involves the following pieces: - Making the first instruction a valid kernel entry point, since kexec ignores the ELF entry value. This requires a separate section and linker magic to prevent the linker from filling the beginning of the section with stubs. - Adding an entry point at 0x60 past the first instruction for systems lacking firmware CPU shutdown support (notably PS3). - Linker script changes to support the above. MFC after: 1 month
2017-12-29 20:30:10 +00:00
/*
* Entry point for bootloaders that do not fully implement ELF and start
* at the beginning of the image (kexec, notably). In its own section so
* that it ends up before any linker-generated call stubs and actually at
* the beginning of the image. kexec on some systems also enters at
* (start of image) + 0x60, so put a spin loop there.
*/
.section ".text.kboot", "x", @progbits
kbootentry:
b __start
. = kbootentry + 0x40 /* Magic address used in platform layer */
.global smp_spin_sem
ap_kexec_spin_sem:
.long -1
. = kbootentry + 0x60 /* Entry point for kexec APs */
ap_kexec_start: /* At 0x60 past start, copied to 0x60 by kexec */
/* r3 set to CPU ID by kexec */
/* Invalidate icache for low-memory copy and jump there */
li %r0,0x80
dcbst 0,%r0
sync
icbi 0,%r0
isync
Make sure the first instruction of the low-memory spinloop is in the cacheline being invalidated. MFC after: 1 month
2017-12-31 05:38:19 +00:00
ba 0x80 /* Absolute branch to next inst */
Add support for 64-bit PowerPC kernels to be directly loaded by kexec, which is used as the bootloader on a number of PPC64 platforms. This involves the following pieces: - Making the first instruction a valid kernel entry point, since kexec ignores the ELF entry value. This requires a separate section and linker magic to prevent the linker from filling the beginning of the section with stubs. - Adding an entry point at 0x60 past the first instruction for systems lacking firmware CPU shutdown support (notably PS3). - Linker script changes to support the above. MFC after: 1 month
2017-12-29 20:30:10 +00:00
Make sure the first instruction of the low-memory spinloop is in the cacheline being invalidated. MFC after: 1 month
2017-12-31 05:38:19 +00:00
. = kbootentry + 0x80 /* Aligned to cache line */
Add support for 64-bit PowerPC kernels to be directly loaded by kexec, which is used as the bootloader on a number of PPC64 platforms. This involves the following pieces: - Making the first instruction a valid kernel entry point, since kexec ignores the ELF entry value. This requires a separate section and linker magic to prevent the linker from filling the beginning of the section with stubs. - Adding an entry point at 0x60 past the first instruction for systems lacking firmware CPU shutdown support (notably PS3). - Linker script changes to support the above. MFC after: 1 month
2017-12-29 20:30:10 +00:00
1: or 31,31,31 /* yield */
sync
lwz %r1,0x40(0) /* Spin on ap_kexec_spin_sem */
cmpw %r1,%r3 /* Until it equals our CPU ID */
bne 1b
/* Released */
or 2,2,2 /* unyield */
ba EXC_RST
/*
* Now start the real text section
*/
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:
/*
Remove dead code and dead comments, most notably the implemenation of the now-obsolete setfault(). No NetBSD code exists in the AIM locore files, so update the copyrights there.
2016-01-10 18:00:01 +00:00
* Main kernel entry point.
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)
Use the cookie now set by loader to determine whether the value passed to PowerPC kernels in r6 is actually metadata from loader(8) or gibberish left in r6, which is not required to be anything under the PAPR/ePAPR/CHRP/OF standards, by another boot loader. Note that, as a result, systems need a new boot loader to boot PPC kernels after this revision without ending up at a mountroot prompt. New boot loaders are backwards compatible and can boot older kernels. Reviewed by: jhibbits MFC after: 2 months
2017-11-26 03:53:20 +00:00
* r7: Magic cookie (0xfb5d104d) to indicate that r6 has loader metadata
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)
Enter 64-bit mode as early as possible in the 64-bit PowerPC boot sequence. Most of the effect of setting MSR[SF] is that the CPU will stop ignoring the high 32 bits of registers containing addresses in load/store instructions. As such, the kernel was setting it only when it began to need access to high memory. MSR[SF] also affects the operation of some conditional instructions, however, and so setting it at late times could subtly break code at very early times. This fixes use of the FDT mode in loader, and FDT boot more generally, on 64-bit PowerPC systems. Hardware provided by: IBM LTC Approved by: re (kib)
2016-06-26 18:43:42 +00:00
/* Set 64-bit mode if not yet set before branching to C */
mfmsr %r20
li %r21,1
insrdi %r20,%r21,1,0
mtmsrd %r20
isync
nop /* Make this block a multiple of 8 bytes */
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)
Use the cookie now set by loader to determine whether the value passed to PowerPC kernels in r6 is actually metadata from loader(8) or gibberish left in r6, which is not required to be anything under the PAPR/ePAPR/CHRP/OF standards, by another boot loader. Note that, as a result, systems need a new boot loader to boot PPC kernels after this revision without ending up at a mountroot prompt. New boot loaders are backwards compatible and can boot older kernels. Reviewed by: jhibbits MFC after: 2 months
2017-11-26 03:53:20 +00:00
std %r7,80(%r1)
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 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)
Use the cookie now set by loader to determine whether the value passed to PowerPC kernels in r6 is actually metadata from loader(8) or gibberish left in r6, which is not required to be anything under the PAPR/ePAPR/CHRP/OF standards, by another boot loader. Note that, as a result, systems need a new boot loader to boot PPC kernels after this revision without ending up at a mountroot prompt. New boot loaders are backwards compatible and can boot older kernels. Reviewed by: jhibbits MFC after: 2 months
2017-11-26 03:53:20 +00:00
ld %r7,80(%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
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
Remove dead code and dead comments, most notably the implemenation of the now-obsolete setfault(). No NetBSD code exists in the AIM locore files, so update the copyrights there.
2016-01-10 18:00:01 +00:00
/* Unreachable */
b .
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
#include <powerpc/aim/trap_subr64.S>
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