mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-04 09:09:56 +00:00
366 lines
9.5 KiB
ArmAsm
366 lines
9.5 KiB
ArmAsm
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
|
|
*
|
|
* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
|
|
* $FreeBSD$
|
|
*
|
|
* originally from: locore.s, by William F. Jolitz
|
|
*
|
|
* Substantially rewritten by David Greenman, Rod Grimes,
|
|
* Bruce Evans, Wolfgang Solfrank, Poul-Henning Kamp
|
|
* and many others.
|
|
*/
|
|
|
|
#include "opt_bootp.h"
|
|
#include "opt_compat.h"
|
|
#include "opt_nfsroot.h"
|
|
#include "opt_global.h"
|
|
#include "opt_pmap.h"
|
|
|
|
#include <sys/syscall.h>
|
|
#include <sys/reboot.h>
|
|
|
|
#include <machine/asmacros.h>
|
|
#include <machine/cputypes.h>
|
|
#include <machine/psl.h>
|
|
#include <machine/pmap.h>
|
|
#include <machine/specialreg.h>
|
|
|
|
#define __ASSEMBLY__
|
|
#include <xen/interface/elfnote.h>
|
|
|
|
/* The defines below have been lifted out of <machine/xen-public/arch-x86_32.h> */
|
|
#define FLAT_RING1_CS 0xe019 /* GDT index 259 */
|
|
#define FLAT_RING1_DS 0xe021 /* GDT index 260 */
|
|
#define KERNEL_CS FLAT_RING1_CS
|
|
#define KERNEL_DS FLAT_RING1_DS
|
|
|
|
#include "assym.s"
|
|
|
|
.section __xen_guest
|
|
.ascii "LOADER=generic,GUEST_OS=freebsd,GUEST_VER=7.0,XEN_VER=xen-3.0,BSD_SYMTAB,VIRT_BASE=0xc0000000"
|
|
.byte 0
|
|
|
|
ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "FreeBSD")
|
|
ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, "HEAD")
|
|
ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0")
|
|
ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .long, KERNBASE)
|
|
ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long, KERNBASE)
|
|
ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .long, btext)
|
|
ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .long, hypercall_page)
|
|
ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, .long, HYPERVISOR_VIRT_START)
|
|
#if 0
|
|
ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
|
|
#endif
|
|
ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_page_tables|supervisor_mode_kernel|writable_descriptor_tables")
|
|
|
|
#ifdef PAE
|
|
ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "yes")
|
|
ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .long, PG_V, PG_V)
|
|
#else
|
|
ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "no")
|
|
ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .long, PG_V, PG_V)
|
|
#endif
|
|
ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic")
|
|
ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long, 1)
|
|
|
|
|
|
|
|
/*
|
|
* XXX
|
|
*
|
|
* Note: This version greatly munged to avoid various assembler errors
|
|
* that may be fixed in newer versions of gas. Perhaps newer versions
|
|
* will have more pleasant appearance.
|
|
*/
|
|
|
|
/*
|
|
* PTmap is recursive pagemap at top of virtual address space.
|
|
* Within PTmap, the page directory can be found (third indirection).
|
|
*/
|
|
.globl PTmap,PTD,PTDpde
|
|
.set PTmap,(PTDPTDI << PDRSHIFT)
|
|
.set PTD,PTmap + (PTDPTDI * PAGE_SIZE)
|
|
.set PTDpde,PTD + (PTDPTDI * PDESIZE)
|
|
|
|
/*
|
|
* Compiled KERNBASE location and the kernel load address
|
|
*/
|
|
.globl kernbase
|
|
.set kernbase,KERNBASE
|
|
.globl kernload
|
|
.set kernload,KERNLOAD
|
|
|
|
/*
|
|
* Globals
|
|
*/
|
|
.data
|
|
ALIGN_DATA /* just to be sure */
|
|
|
|
.space 0x2000 /* space for tmpstk - temporary stack */
|
|
tmpstk:
|
|
|
|
.globl bootinfo
|
|
bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */
|
|
|
|
.globl KERNend
|
|
KERNend: .long 0 /* phys addr end of kernel (just after bss) */
|
|
.globl physfree
|
|
physfree: .long 0 /* phys addr of next free page */
|
|
|
|
.globl IdlePTD
|
|
IdlePTD: .long 0 /* phys addr of kernel PTD */
|
|
|
|
#ifdef PAE
|
|
.globl IdlePDPT
|
|
IdlePDPT: .long 0 /* phys addr of kernel PDPT */
|
|
#endif
|
|
|
|
#ifdef SMP
|
|
.globl KPTphys
|
|
#endif
|
|
KPTphys: .long 0 /* phys addr of kernel page tables */
|
|
#ifdef SMP
|
|
.globl gdtset
|
|
#endif
|
|
gdtset: .long 0 /* GDT is valid */
|
|
|
|
.globl proc0kstack
|
|
proc0uarea: .long 0 /* address of proc 0 uarea (unused)*/
|
|
proc0kstack: .long 0 /* address of proc 0 kstack space */
|
|
p0upa: .long 0 /* phys addr of proc0 UAREA (unused) */
|
|
p0kpa: .long 0 /* phys addr of proc0's STACK */
|
|
|
|
vm86phystk: .long 0 /* PA of vm86/bios stack */
|
|
|
|
.globl vm86paddr, vm86pa
|
|
vm86paddr: .long 0 /* address of vm86 region */
|
|
vm86pa: .long 0 /* phys addr of vm86 region */
|
|
|
|
#ifdef PC98
|
|
.globl pc98_system_parameter
|
|
pc98_system_parameter:
|
|
.space 0x240
|
|
#endif
|
|
|
|
.globl avail_space
|
|
avail_space: .long 0
|
|
|
|
/**********************************************************************
|
|
*
|
|
* Some handy macros
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* We're already in protected mode, so no remapping is needed.
|
|
*/
|
|
#define R(foo) (foo)
|
|
|
|
#define ALLOCPAGES(foo) \
|
|
movl R(physfree), %esi ; \
|
|
movl $((foo)*PAGE_SIZE), %eax ; \
|
|
addl %esi, %eax ; \
|
|
movl %eax, R(physfree) ; \
|
|
movl %esi, %edi ; \
|
|
movl $((foo)*PAGE_SIZE),%ecx ; \
|
|
xorl %eax,%eax ; \
|
|
cld ; \
|
|
rep ; \
|
|
stosb
|
|
|
|
/*
|
|
* fillkpt
|
|
* eax = page frame address
|
|
* ebx = index into page table
|
|
* ecx = how many pages to map
|
|
* base = base address of page dir/table
|
|
* prot = protection bits
|
|
*/
|
|
#define fillkpt(base, prot) \
|
|
shll $PTESHIFT,%ebx ; \
|
|
addl base,%ebx ; \
|
|
orl $PG_V,%eax ; \
|
|
orl prot,%eax ; \
|
|
1: movl %eax,(%ebx) ; \
|
|
addl $PAGE_SIZE,%eax ; /* increment physical address */ \
|
|
addl $PTESIZE,%ebx ; /* next pte */ \
|
|
loop 1b
|
|
|
|
/*
|
|
* fillkptphys(prot)
|
|
* eax = physical address
|
|
* ecx = how many pages to map
|
|
* prot = protection bits
|
|
*/
|
|
#define fillkptphys(prot) \
|
|
movl %eax, %ebx ; \
|
|
shrl $PAGE_SHIFT, %ebx ; \
|
|
fillkpt(R(KPTphys), prot)
|
|
|
|
/* Temporary stack */
|
|
.space 8192
|
|
tmpstack:
|
|
.long tmpstack, KERNEL_DS
|
|
|
|
.text
|
|
|
|
.p2align 12, 0x90
|
|
|
|
#define HYPERCALL_PAGE_OFFSET 0x1000
|
|
.org HYPERCALL_PAGE_OFFSET
|
|
ENTRY(hypercall_page)
|
|
.cfi_startproc
|
|
.skip 0x1000
|
|
.cfi_endproc
|
|
|
|
/**********************************************************************
|
|
*
|
|
* This is where the bootblocks start us, set the ball rolling...
|
|
*
|
|
*/
|
|
NON_GPROF_ENTRY(btext)
|
|
/* At the end of our stack, we shall have free space - so store it */
|
|
movl %esp,%ebx
|
|
movl %ebx,R(avail_space)
|
|
|
|
lss tmpstack,%esp
|
|
|
|
pushl %esi
|
|
call initvalues
|
|
popl %esi
|
|
|
|
/* Store the CPUID information */
|
|
xorl %eax,%eax
|
|
cpuid # cpuid 0
|
|
movl %eax,R(cpu_high) # highest capability
|
|
movl %ebx,R(cpu_vendor) # store vendor string
|
|
movl %edx,R(cpu_vendor+4)
|
|
movl %ecx,R(cpu_vendor+8)
|
|
movb $0,R(cpu_vendor+12)
|
|
|
|
movl $1,%eax
|
|
cpuid # cpuid 1
|
|
movl %eax,R(cpu_id) # store cpu_id
|
|
movl %ebx,R(cpu_procinfo) # store cpu_procinfo
|
|
movl %edx,R(cpu_feature) # store cpu_feature
|
|
movl %ecx,R(cpu_feature2) # store cpu_feature2
|
|
rorl $8,%eax # extract family type
|
|
andl $15,%eax
|
|
cmpl $5,%eax
|
|
movl $CPU_686,R(cpu)
|
|
|
|
movl proc0kstack,%eax
|
|
leal (KSTACK_PAGES*PAGE_SIZE-PCB_SIZE)(%eax),%esp
|
|
xorl %ebp,%ebp /* mark end of frames */
|
|
#ifdef PAE
|
|
movl IdlePDPT,%esi
|
|
#else
|
|
movl IdlePTD,%esi
|
|
#endif
|
|
movl %esi,(KSTACK_PAGES*PAGE_SIZE-PCB_SIZE+PCB_CR3)(%eax)
|
|
pushl physfree
|
|
call init386
|
|
addl $4, %esp
|
|
call mi_startup
|
|
/* NOTREACHED */
|
|
int $3
|
|
|
|
/*
|
|
* Signal trampoline, copied to top of user stack
|
|
*/
|
|
NON_GPROF_ENTRY(sigcode)
|
|
calll *SIGF_HANDLER(%esp)
|
|
leal SIGF_UC(%esp),%eax /* get ucontext */
|
|
pushl %eax
|
|
testl $PSL_VM,UC_EFLAGS(%eax)
|
|
jne 1f
|
|
mov UC_GS(%eax), %gs /* restore %gs */
|
|
1:
|
|
movl $SYS_sigreturn,%eax
|
|
pushl %eax /* junk to fake return addr. */
|
|
int $0x80 /* enter kernel with args */
|
|
/* on stack */
|
|
1:
|
|
jmp 1b
|
|
|
|
#ifdef COMPAT_FREEBSD4
|
|
ALIGN_TEXT
|
|
freebsd4_sigcode:
|
|
calll *SIGF_HANDLER(%esp)
|
|
leal SIGF_UC4(%esp),%eax /* get ucontext */
|
|
pushl %eax
|
|
testl $PSL_VM,UC4_EFLAGS(%eax)
|
|
jne 1f
|
|
mov UC4_GS(%eax),%gs /* restore %gs */
|
|
1:
|
|
movl $344,%eax /* 4.x SYS_sigreturn */
|
|
pushl %eax /* junk to fake return addr. */
|
|
int $0x80 /* enter kernel with args */
|
|
/* on stack */
|
|
1:
|
|
jmp 1b
|
|
#endif
|
|
|
|
#ifdef COMPAT_43
|
|
ALIGN_TEXT
|
|
osigcode:
|
|
call *SIGF_HANDLER(%esp) /* call signal handler */
|
|
lea SIGF_SC(%esp),%eax /* get sigcontext */
|
|
pushl %eax
|
|
testl $PSL_VM,SC_PS(%eax)
|
|
jne 9f
|
|
movl SC_GS(%eax),%gs /* restore %gs */
|
|
9:
|
|
movl $103,%eax /* 3.x SYS_sigreturn */
|
|
pushl %eax /* junk to fake return addr. */
|
|
int $0x80 /* enter kernel with args */
|
|
0: jmp 0b
|
|
#endif /* COMPAT_43 */
|
|
|
|
ALIGN_TEXT
|
|
esigcode:
|
|
|
|
.data
|
|
.globl szsigcode
|
|
szsigcode:
|
|
.long esigcode-sigcode
|
|
#ifdef COMPAT_FREEBSD4
|
|
.globl szfreebsd4_sigcode
|
|
szfreebsd4_sigcode:
|
|
.long esigcode-freebsd4_sigcode
|
|
#endif
|
|
#ifdef COMPAT_43
|
|
.globl szosigcode
|
|
szosigcode:
|
|
.long esigcode-osigcode
|
|
#endif
|