/*
* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <mach_ldebug.h>
#include <sys/kdebug.h>
#include <mach/kern_return.h>
#include <mach/thread_status.h>
#include <mach/vm_param.h>
#include <kern/mach_param.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <kern/sched_prim.h>
#include <kern/misc_protos.h>
#include <kern/assert.h>
#include <kern/spl.h>
#include <ipc/ipc_port.h>
#include <vm/vm_kern.h>
#include <vm/vm_map.h>
#include <vm/pmap.h>
#include <i386/cpu_data.h>
#include <i386/cpu_number.h>
#include <i386/thread.h>
#include <i386/eflags.h>
#include <i386/proc_reg.h>
#include <i386/seg.h>
#include <i386/tss.h>
#include <i386/user_ldt.h>
#include <i386/fpu.h>
#include <i386/misc_protos.h>
/*
* pmap_zero_page zeros the specified (machine independent) page.
*/
void
pmap_zero_page(
ppnum_t pn)
{
assert(pn != vm_page_fictitious_addr);
assert(pn != vm_page_guard_addr);
bzero_phys((addr64_t)i386_ptob(pn), PAGE_SIZE);
}
/*
* pmap_zero_part_page
* zeros the specified (machine independent) part of a page.
*/
void
pmap_zero_part_page(
ppnum_t pn,
vm_offset_t offset,
vm_size_t len)
{
assert(pn != vm_page_fictitious_addr);
assert(pn != vm_page_guard_addr);
assert(offset + len <= PAGE_SIZE);
bzero_phys((addr64_t)(i386_ptob(pn) + offset), (uint32_t)len);
}
/*
* pmap_copy_page copies the specified (machine independent) pages.
*/
void
pmap_copy_part_page(
ppnum_t psrc,
vm_offset_t src_offset,
ppnum_t pdst,
vm_offset_t dst_offset,
vm_size_t len)
{
pmap_paddr_t src, dst;
assert(psrc != vm_page_fictitious_addr);
assert(pdst != vm_page_fictitious_addr);
assert(psrc != vm_page_guard_addr);
assert(pdst != vm_page_guard_addr);
src = i386_ptob(psrc);
dst = i386_ptob(pdst);
assert((((uintptr_t)dst & PAGE_MASK) + dst_offset + len) <= PAGE_SIZE);
assert((((uintptr_t)src & PAGE_MASK) + src_offset + len) <= PAGE_SIZE);
bcopy_phys((addr64_t)src + (src_offset & INTEL_OFFMASK),
(addr64_t)dst + (dst_offset & INTEL_OFFMASK),
len);
}
/*
* pmap_copy_part_lpage copies part of a virtually addressed page
* to a physically addressed page.
*/
void
pmap_copy_part_lpage(
__unused vm_offset_t src,
__unused ppnum_t pdst,
__unused vm_offset_t dst_offset,
__unused vm_size_t len)
{
assert(pdst != vm_page_fictitious_addr);
assert(pdst != vm_page_guard_addr);
assert((dst_offset + len) <= PAGE_SIZE);
}
/*
* pmap_copy_part_rpage copies part of a physically addressed page
* to a virtually addressed page.
*/
void
pmap_copy_part_rpage(
__unused ppnum_t psrc,
__unused vm_offset_t src_offset,
__unused vm_offset_t dst,
__unused vm_size_t len)
{
assert(psrc != vm_page_fictitious_addr);
assert(psrc != vm_page_guard_addr);
assert((src_offset + len) <= PAGE_SIZE);
}
/*
* kvtophys(addr)
*
* Convert a kernel virtual address to a physical address
*/
addr64_t
kvtophys(
vm_offset_t addr)
{
pmap_paddr_t pa;
pa = ((pmap_paddr_t)pmap_find_phys(kernel_pmap, addr)) << INTEL_PGSHIFT;
if (pa) {
pa |= (addr & INTEL_OFFMASK);
}
return (addr64_t)pa;
}
extern pt_entry_t *debugger_ptep;
extern vm_offset_t debugger_window_kva;
extern int _bcopy(const void *, void *, vm_size_t);
extern int _bcopy2(const void *, void *);
extern int _bcopy4(const void *, void *);
extern int _bcopy8(const void *, void *);
__private_extern__ int
ml_copy_phys(addr64_t src64, addr64_t dst64, vm_size_t bytes)
{
void *src, *dst;
int err = 0;
mp_disable_preemption();
addr64_t debug_pa = 0;
/* If either destination or source are outside the
* physical map, establish a physical window onto the target frame.
*/
assert(physmap_enclosed(src64) || physmap_enclosed(dst64));
if (physmap_enclosed(src64) == FALSE) {
src = (void *)(debugger_window_kva | (src64 & INTEL_OFFMASK));
dst = PHYSMAP_PTOV(dst64);
debug_pa = src64 & PG_FRAME;
} else if (physmap_enclosed(dst64) == FALSE) {
src = PHYSMAP_PTOV(src64);
dst = (void *)(debugger_window_kva | (dst64 & INTEL_OFFMASK));
debug_pa = dst64 & PG_FRAME;
} else {
src = PHYSMAP_PTOV(src64);
dst = PHYSMAP_PTOV(dst64);
}
/* DRK: debugger only routine, we don't bother checking for an
* identical mapping.
*/
if (debug_pa) {
if (debugger_window_kva == 0) {
panic("%s: invoked in non-debug mode", __FUNCTION__);
}
/* Establish a cache-inhibited physical window; some platforms
* may not cover arbitrary ranges with MTRRs
*/
pmap_store_pte(FALSE, debugger_ptep, debug_pa | INTEL_PTE_NCACHE | INTEL_PTE_RW | INTEL_PTE_REF | INTEL_PTE_MOD | INTEL_PTE_VALID);
pmap_tlbi_range(0, ~0ULL, true, 0);
#if DEBUG
kprintf("Remapping debugger physical window at %p to 0x%llx\n", (void *)debugger_window_kva, debug_pa);
#endif
}
/* ensure we stay within a page */
if (((((uint32_t)src64 & (I386_PGBYTES - 1)) + bytes) > I386_PGBYTES) || ((((uint32_t)dst64 & (I386_PGBYTES - 1)) + bytes) > I386_PGBYTES)) {
panic("ml_copy_phys spans pages, src: 0x%llx, dst: 0x%llx", src64, dst64);
}
/*
* For device register access from the debugger,
* 2-byte/16-bit, 4-byte/32-bit and 8-byte/64-bit copies are handled
* by assembly routines ensuring the required access widths.
* 1-byte and other copies are handled by the regular _bcopy.
*/
switch (bytes) {
case 2:
err = _bcopy2(src, dst);
break;
case 4:
err = _bcopy4(src, dst);
break;
case 8:
err = _bcopy8(src, dst);
break;
case 1:
default:
err = _bcopy(src, dst, bytes);
break;
}
mp_enable_preemption();
return err;
}