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Add pmap function pmap_copy_pages(), which copies the content of the

Browse Source 
pages around, taking array of vm_page_t both for source and
destination.  Starting offsets and total transfer size are specified.

The function implements optimal algorithm for copying using the
platform-specific optimizations.  For instance, on the architectures
were the direct map is available, no transient mappings are created,
for i386 the per-cpu ephemeral page frame is used.  The code was
typically borrowed from the pmap_copy_page() for the same
architecture.

Only i386/amd64, powerpc aim and arm/arm-v6 implementations were
tested at the time of commit. High-level code, not committed yet to
the tree, ensures that the use of the function is only allowed after
explicit enablement.

For sparc64, the existing code has known issues and a stab is added
instead, to allow the kernel linking.

Sponsored by:	The FreeBSD Foundation
Tested by:	pho (i386, amd64), scottl (amd64), ian (arm and arm-v6)
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2013-03-14 20:18:12 +00:00
parent d44ae92a69
commit e8a4a618cf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=248280
15 changed files with 466 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
sys/amd64/amd64/pmap.c
View File

@ -4272,6 +4272,30 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
pagecopy((void *)src, (void *)dst);
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
void *a_cp, *b_cp;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
while (xfersize > 0) {
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
a_cp = (char *)PHYS_TO_DMAP(ma[a_offset >> PAGE_SHIFT]->
phys_addr) + a_pg_offset;
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
b_cp = (char *)PHYS_TO_DMAP(mb[b_offset >> PAGE_SHIFT]->
phys_addr) + b_pg_offset;
bcopy(a_cp, b_cp, cnt);
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
}
/*
* Returns true if the pmap's pv is one of the first
* 16 pvs linked to from this page. This count may

39
sys/arm/arm/pmap-v6.c
View File

@ -3312,6 +3312,45 @@ pmap_copy_page_generic(vm_paddr_t src, vm_paddr_t dst)
mtx_unlock(&cmtx);
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
vm_page_t a_pg, b_pg;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
mtx_lock(&cmtx);
while (xfersize > 0) {
a_pg = ma[a_offset >> PAGE_SHIFT];
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
b_pg = mb[b_offset >> PAGE_SHIFT];
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
*csrc_pte = L2_S_PROTO | VM_PAGE_TO_PHYS(a_pg) |
pte_l2_s_cache_mode;
pmap_set_prot(csrc_pte, VM_PROT_READ, 0);
PTE_SYNC(csrc_pte);
*cdst_pte = L2_S_PROTO | VM_PAGE_TO_PHYS(b_pg) |
pte_l2_s_cache_mode;
pmap_set_prot(cdst_pte, VM_PROT_READ | VM_PROT_WRITE, 0);
PTE_SYNC(cdst_pte);
cpu_tlb_flushD_SE(csrcp);
cpu_tlb_flushD_SE(cdstp);
cpu_cpwait();
bcopy((char *)csrcp + a_pg_offset, (char *)cdstp + b_pg_offset,
cnt);
cpu_idcache_wbinv_range(cdstp + b_pg_offset, cnt);
pmap_l2cache_wbinv_range(cdstp + b_pg_offset,
VM_PAGE_TO_PHYS(b_pg) + b_pg_offset, cnt);
xfersize -= cnt;
a_offset += cnt;
b_offset += cnt;
}
mtx_unlock(&cmtx);
}
void
pmap_copy_page(vm_page_t src, vm_page_t dst)
{

93
sys/arm/arm/pmap.c
View File

@ -258,6 +258,9 @@ pt_entry_t pte_l1_c_proto;
pt_entry_t pte_l2_s_proto;
void (*pmap_copy_page_func)(vm_paddr_t, vm_paddr_t);
void (*pmap_copy_page_offs_func)(vm_paddr_t a_phys,
vm_offset_t a_offs, vm_paddr_t b_phys, vm_offset_t b_offs,
int cnt);
void (*pmap_zero_page_func)(vm_paddr_t, int, int);
struct msgbuf *msgbufp = 0;
@ -400,6 +403,13 @@ static vm_paddr_t pmap_kernel_l2ptp_phys;
static int pv_entry_count=0, pv_entry_max=0, pv_entry_high_water=0;
static struct rwlock pvh_global_lock;
void pmap_copy_page_offs_generic(vm_paddr_t a_phys, vm_offset_t a_offs,
vm_paddr_t b_phys, vm_offset_t b_offs, int cnt);
#if ARM_MMU_XSCALE == 1
void pmap_copy_page_offs_xscale(vm_paddr_t a_phys, vm_offset_t a_offs,
vm_paddr_t b_phys, vm_offset_t b_offs, int cnt);
#endif
/*
* This list exists for the benefit of pmap_map_chunk(). It keeps track
* of the kernel L2 tables during bootstrap, so that pmap_map_chunk() can
@ -484,6 +494,7 @@ pmap_pte_init_generic(void)
pte_l2_s_proto = L2_S_PROTO_generic;
pmap_copy_page_func = pmap_copy_page_generic;
pmap_copy_page_offs_func = pmap_copy_page_offs_generic;
pmap_zero_page_func = pmap_zero_page_generic;
}
@ -660,6 +671,7 @@ pmap_pte_init_xscale(void)
#ifdef CPU_XSCALE_CORE3
pmap_copy_page_func = pmap_copy_page_generic;
pmap_copy_page_offs_func = pmap_copy_page_offs_generic;
pmap_zero_page_func = pmap_zero_page_generic;
xscale_use_minidata = 0;
/* Make sure it is L2-cachable */
@ -672,6 +684,7 @@ pmap_pte_init_xscale(void)
#else
pmap_copy_page_func = pmap_copy_page_xscale;
pmap_copy_page_offs_func = pmap_copy_page_offs_xscale;
pmap_zero_page_func = pmap_zero_page_xscale;
#endif
@ -4300,6 +4313,29 @@ pmap_copy_page_generic(vm_paddr_t src, vm_paddr_t dst)
cpu_l2cache_inv_range(csrcp, PAGE_SIZE);
cpu_l2cache_wbinv_range(cdstp, PAGE_SIZE);
}
void
pmap_copy_page_offs_generic(vm_paddr_t a_phys, vm_offset_t a_offs,
vm_paddr_t b_phys, vm_offset_t b_offs, int cnt)
{
mtx_lock(&cmtx);
*csrc_pte = L2_S_PROTO | a_phys |
L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode;
PTE_SYNC(csrc_pte);
*cdst_pte = L2_S_PROTO | b_phys |
L2_S_PROT(PTE_KERNEL, VM_PROT_WRITE) | pte_l2_s_cache_mode;
PTE_SYNC(cdst_pte);
cpu_tlb_flushD_SE(csrcp);
cpu_tlb_flushD_SE(cdstp);
cpu_cpwait();
bcopy((char *)csrcp + a_offs, (char *)cdstp + b_offs, cnt);
mtx_unlock(&cmtx);
cpu_dcache_inv_range(csrcp + a_offs, cnt);
cpu_dcache_wbinv_range(cdstp + b_offs, cnt);
cpu_l2cache_inv_range(csrcp + a_offs, cnt);
cpu_l2cache_wbinv_range(cdstp + b_offs, cnt);
}
#endif /* (ARM_MMU_GENERIC + ARM_MMU_SA1) != 0 */
#if ARM_MMU_XSCALE == 1
@ -4344,6 +4380,28 @@ pmap_copy_page_xscale(vm_paddr_t src, vm_paddr_t dst)
mtx_unlock(&cmtx);
xscale_cache_clean_minidata();
}
void
pmap_copy_page_offs_xscale(vm_paddr_t a_phys, vm_offset_t a_offs,
vm_paddr_t b_phys, vm_offset_t b_offs, int cnt)
{
mtx_lock(&cmtx);
*csrc_pte = L2_S_PROTO | a_phys |
L2_S_PROT(PTE_KERNEL, VM_PROT_READ) |
L2_C | L2_XSCALE_T_TEX(TEX_XSCALE_X);
PTE_SYNC(csrc_pte);
*cdst_pte = L2_S_PROTO | b_phys |
L2_S_PROT(PTE_KERNEL, VM_PROT_WRITE) |
L2_C | L2_XSCALE_T_TEX(TEX_XSCALE_X);
PTE_SYNC(cdst_pte);
cpu_tlb_flushD_SE(csrcp);
cpu_tlb_flushD_SE(cdstp);
cpu_cpwait();
bcopy((char *)csrcp + a_offs, (char *)cdstp + b_offs, cnt);
mtx_unlock(&cmtx);
xscale_cache_clean_minidata();
}
#endif /* ARM_MMU_XSCALE == 1 */
void
@ -4370,8 +4428,41 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
#endif
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
vm_page_t a_pg, b_pg;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
#ifdef ARM_USE_SMALL_ALLOC
vm_offset_t a_va, b_va;
#endif
cpu_dcache_wbinv_all();
cpu_l2cache_wbinv_all();
while (xfersize > 0) {
a_pg = ma[a_offset >> PAGE_SHIFT];
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
b_pg = mb[b_offset >> PAGE_SHIFT];
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
#ifdef ARM_USE_SMALL_ALLOC
a_va = arm_ptovirt(VM_PAGE_TO_PHYS(a_pg)) + a_pg_offset;
b_va = arm_ptovirt(VM_PAGE_TO_PHYS(b_pg)) + b_pg_offset;
bcopy((char *)a_va, (char *)b_va, cnt);
cpu_dcache_wbinv_range(b_va, cnt);
cpu_l2cache_wbinv_range(b_va, cnt);
#else
pmap_copy_page_offs_func(VM_PAGE_TO_PHYS(a_pg), a_pg_offset,
VM_PAGE_TO_PHYS(b_pg), b_pg_offset, cnt);
#endif
xfersize -= cnt;
a_offset += cnt;
b_offset += cnt;
}
}
/*
* this routine returns true if a physical page resides

2
sys/arm/include/pmap.h
View File

@ -533,6 +533,8 @@ extern pt_entry_t pte_l1_c_proto;
extern pt_entry_t pte_l2_s_proto;
extern void (*pmap_copy_page_func)(vm_paddr_t, vm_paddr_t);
extern void (*pmap_copy_page_offs_func)(vm_paddr_t a_phys,
vm_offset_t a_offs, vm_paddr_t b_phys, vm_offset_t b_offs, int cnt);
extern void (*pmap_zero_page_func)(vm_paddr_t, int, int);
#if (ARM_MMU_GENERIC + ARM_MMU_V6 + ARM_MMU_V7 + ARM_MMU_SA1) != 0 || defined(CPU_XSCALE_81342)

43
sys/i386/i386/pmap.c
View File

@ -4238,6 +4238,49 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
mtx_unlock(&sysmaps->lock);
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
struct sysmaps *sysmaps;
vm_page_t a_pg, b_pg;
char *a_cp, *b_cp;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
sysmaps = &sysmaps_pcpu[PCPU_GET(cpuid)];
mtx_lock(&sysmaps->lock);
if (*sysmaps->CMAP1 != 0)
panic("pmap_copy_pages: CMAP1 busy");
if (*sysmaps->CMAP2 != 0)
panic("pmap_copy_pages: CMAP2 busy");
sched_pin();
while (xfersize > 0) {
invlpg((u_int)sysmaps->CADDR1);
invlpg((u_int)sysmaps->CADDR2);
a_pg = ma[a_offset >> PAGE_SHIFT];
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
b_pg = mb[b_offset >> PAGE_SHIFT];
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
*sysmaps->CMAP1 = PG_V | VM_PAGE_TO_PHYS(a_pg) | PG_A |
pmap_cache_bits(b_pg->md.pat_mode, 0);
*sysmaps->CMAP2 = PG_V | PG_RW | VM_PAGE_TO_PHYS(b_pg) | PG_A |
PG_M | pmap_cache_bits(b_pg->md.pat_mode, 0);
a_cp = sysmaps->CADDR1 + a_pg_offset;
b_cp = sysmaps->CADDR2 + b_pg_offset;
bcopy(a_cp, b_cp, cnt);
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
*sysmaps->CMAP1 = 0;
*sysmaps->CMAP2 = 0;
sched_unpin();
mtx_unlock(&sysmaps->lock);
}
/*
* Returns true if the pmap's pv is one of the first
* 16 pvs linked to from this page. This count may

40
sys/i386/xen/pmap.c
View File

@ -3447,6 +3447,46 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
mtx_unlock(&sysmaps->lock);
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
struct sysmaps *sysmaps;
vm_page_t a_pg, b_pg;
char *a_cp, *b_cp;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
sysmaps = &sysmaps_pcpu[PCPU_GET(cpuid)];
mtx_lock(&sysmaps->lock);
if (*sysmaps->CMAP1 != 0)
panic("pmap_copy_pages: CMAP1 busy");
if (*sysmaps->CMAP2 != 0)
panic("pmap_copy_pages: CMAP2 busy");
sched_pin();
while (xfersize > 0) {
a_pg = ma[a_offset >> PAGE_SHIFT];
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
b_pg = mb[b_offset >> PAGE_SHIFT];
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
PT_SET_MA(sysmaps->CADDR1, PG_V | VM_PAGE_TO_MACH(a_pg) | PG_A);
PT_SET_MA(sysmaps->CADDR2, PG_V | PG_RW |
VM_PAGE_TO_MACH(b_pg) | PG_A | PG_M);
a_cp = sysmaps->CADDR1 + a_pg_offset;
b_cp = sysmaps->CADDR2 + b_pg_offset;
bcopy(a_cp, b_cp, cnt);
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
PT_SET_MA(sysmaps->CADDR1, 0);
PT_SET_MA(sysmaps->CADDR2, 0);
sched_unpin();
mtx_unlock(&sysmaps->lock);
}
/*
* Returns true if the pmap's pv is one of the first
* 16 pvs linked to from this page. This count may

24
sys/ia64/ia64/pmap.c
View File

@ -2014,6 +2014,30 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
bcopy(src, dst, PAGE_SIZE);
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
void *a_cp, *b_cp;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
while (xfersize > 0) {
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
a_cp = (char *)pmap_page_to_va(ma[a_offset >> PAGE_SHIFT]) +
a_pg_offset;
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
b_cp = (char *)pmap_page_to_va(mb[b_offset >> PAGE_SHIFT]) +
b_pg_offset;
bcopy(a_cp, b_cp, cnt);
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
}
/*
* Returns true if the pmap's pv is one of the first
* 16 pvs linked to from this page. This count may

45
sys/mips/mips/pmap.c
View File

@ -2576,6 +2576,51 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
}
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
char *a_cp, *b_cp;
vm_page_t a_m, b_m;
vm_offset_t a_pg_offset, b_pg_offset;
vm_paddr_t a_phys, b_phys;
int cnt;
while (xfersize > 0) {
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
a_m = ma[a_offset >> PAGE_SHIFT];
a_phys = VM_PAGE_TO_PHYS(a_m);
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
b_m = mb[b_offset >> PAGE_SHIFT];
b_phys = VM_PAGE_TO_PHYS(b_m);
if (MIPS_DIRECT_MAPPABLE(a_phys) &&
MIPS_DIRECT_MAPPABLE(b_phys)) {
pmap_flush_pvcache(a_m);
mips_dcache_wbinv_range_index(
MIPS_PHYS_TO_DIRECT(b_phys), PAGE_SIZE);
a_cp = (char *)MIPS_PHYS_TO_DIRECT(a_phys) +
a_pg_offset;
b_cp = (char *)MIPS_PHYS_TO_DIRECT(b_phys) +
b_pg_offset;
bcopy(a_cp, b_cp, cnt);
mips_dcache_wbinv_range((vm_offset_t)b_cp, cnt);
} else {
a_cp = (char *)pmap_lmem_map2(a_phys, b_phys);
b_cp = (char *)a_cp + PAGE_SIZE;
a_cp += a_pg_offset;
b_cp += b_pg_offset;
bcopy(a_cp, b_cp, cnt);
mips_dcache_wbinv_range((vm_offset_t)b_cp, cnt);
pmap_lmem_unmap();
}
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
}
/*
* Returns true if the pmap's pv is one of the first
* 16 pvs linked to from this page. This count may

27
sys/powerpc/aim/mmu_oea.c
View File

@ -275,6 +275,8 @@ void moea_change_wiring(mmu_t, pmap_t, vm_offset_t, boolean_t);
void moea_clear_modify(mmu_t, vm_page_t);
void moea_clear_reference(mmu_t, vm_page_t);
void moea_copy_page(mmu_t, vm_page_t, vm_page_t);
void moea_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
vm_page_t *mb, vm_offset_t b_offset, int xfersize);
void moea_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t, boolean_t);
void moea_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_page_t,
vm_prot_t);
@ -320,6 +322,7 @@ static mmu_method_t moea_methods[] = {
MMUMETHOD(mmu_clear_modify, moea_clear_modify),
MMUMETHOD(mmu_clear_reference, moea_clear_reference),
MMUMETHOD(mmu_copy_page, moea_copy_page),
MMUMETHOD(mmu_copy_pages, moea_copy_pages),
MMUMETHOD(mmu_enter, moea_enter),
MMUMETHOD(mmu_enter_object, moea_enter_object),
MMUMETHOD(mmu_enter_quick, moea_enter_quick),
@ -1043,6 +1046,30 @@ moea_copy_page(mmu_t mmu, vm_page_t msrc, vm_page_t mdst)
bcopy((void *)src, (void *)dst, PAGE_SIZE);
}
void
moea_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
vm_page_t *mb, vm_offset_t b_offset, int xfersize)
{
void *a_cp, *b_cp;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
while (xfersize > 0) {
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
a_cp = (char *)VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]) +
a_pg_offset;
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
b_cp = (char *)VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]) +
b_pg_offset;
bcopy(a_cp, b_cp, cnt);
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
}
/*
* Zero a page of physical memory by temporarily mapping it into the tlb.
*/

69
sys/powerpc/aim/mmu_oea64.c
View File

@ -290,6 +290,8 @@ void moea64_change_wiring(mmu_t, pmap_t, vm_offset_t, boolean_t);
void moea64_clear_modify(mmu_t, vm_page_t);
void moea64_clear_reference(mmu_t, vm_page_t);
void moea64_copy_page(mmu_t, vm_page_t, vm_page_t);
void moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
vm_page_t *mb, vm_offset_t b_offset, int xfersize);
void moea64_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t, boolean_t);
void moea64_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_page_t,
vm_prot_t);
@ -334,6 +336,7 @@ static mmu_method_t moea64_methods[] = {
MMUMETHOD(mmu_clear_modify, moea64_clear_modify),
MMUMETHOD(mmu_clear_reference, moea64_clear_reference),
MMUMETHOD(mmu_copy_page, moea64_copy_page),
MMUMETHOD(mmu_copy_pages, moea64_copy_pages),
MMUMETHOD(mmu_enter, moea64_enter),
MMUMETHOD(mmu_enter_object, moea64_enter_object),
MMUMETHOD(mmu_enter_quick, moea64_enter_quick),
@ -1104,6 +1107,72 @@ moea64_copy_page(mmu_t mmu, vm_page_t msrc, vm_page_t mdst)
}
}
static inline void
moea64_copy_pages_dmap(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
vm_page_t *mb, vm_offset_t b_offset, int xfersize)
{
void *a_cp, *b_cp;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
while (xfersize > 0) {
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
a_cp = (char *)VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]) +
a_pg_offset;
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
b_cp = (char *)VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]) +
b_pg_offset;
bcopy(a_cp, b_cp, cnt);
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
}
static inline void
moea64_copy_pages_nodmap(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
vm_page_t *mb, vm_offset_t b_offset, int xfersize)
{
void *a_cp, *b_cp;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
mtx_lock(&moea64_scratchpage_mtx);
while (xfersize > 0) {
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
moea64_set_scratchpage_pa(mmu, 0,
VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]));
a_cp = (char *)moea64_scratchpage_va[0] + a_pg_offset;
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
moea64_set_scratchpage_pa(mmu, 1,
VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]));
b_cp = (char *)moea64_scratchpage_va[1] + b_pg_offset;
bcopy(a_cp, b_cp, cnt);
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
mtx_unlock(&moea64_scratchpage_mtx);
}
void
moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
vm_page_t *mb, vm_offset_t b_offset, int xfersize)
{
if (hw_direct_map) {
moea64_copy_pages_dmap(mmu, ma, a_offset, mb, b_offset,
xfersize);
} else {
moea64_copy_pages_nodmap(mmu, ma, a_offset, mb, b_offset,
xfersize);
}
}
void
moea64_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size)
{

33
sys/powerpc/booke/pmap.c
View File

@ -274,6 +274,8 @@ static void mmu_booke_clear_reference(mmu_t, vm_page_t);
static void mmu_booke_copy(mmu_t, pmap_t, pmap_t, vm_offset_t,
vm_size_t, vm_offset_t);
static void mmu_booke_copy_page(mmu_t, vm_page_t, vm_page_t);
static void mmu_booke_copy_pages(mmu_t, vm_page_t *,
vm_offset_t, vm_page_t *, vm_offset_t, int);
static void mmu_booke_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t,
vm_prot_t, boolean_t);
static void mmu_booke_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t,
@ -334,6 +336,7 @@ static mmu_method_t mmu_booke_methods[] = {
MMUMETHOD(mmu_clear_reference, mmu_booke_clear_reference),
MMUMETHOD(mmu_copy, mmu_booke_copy),
MMUMETHOD(mmu_copy_page, mmu_booke_copy_page),
MMUMETHOD(mmu_copy_pages, mmu_booke_copy_pages),
MMUMETHOD(mmu_enter, mmu_booke_enter),
MMUMETHOD(mmu_enter_object, mmu_booke_enter_object),
MMUMETHOD(mmu_enter_quick, mmu_booke_enter_quick),
@ -2136,6 +2139,36 @@ mmu_booke_copy_page(mmu_t mmu, vm_page_t sm, vm_page_t dm)
mtx_unlock(&copy_page_mutex);
}
static inline void
mmu_booke_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
vm_page_t *mb, vm_offset_t b_offset, int xfersize)
{
void *a_cp, *b_cp;
vm_offset_t a_pg_offset, b_pg_offset;
int cnt;
mtx_lock(&copy_page_mutex);
while (xfersize > 0) {
a_pg_offset = a_offset & PAGE_MASK;
cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
mmu_booke_kenter(mmu, copy_page_src_va,
VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]));
a_cp = (char *)copy_page_src_va + a_pg_offset;
b_pg_offset = b_offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - b_pg_offset);
mmu_booke_kenter(mmu, copy_page_dst_va,
VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]));
b_cp = (char *)copy_page_dst_va + b_pg_offset;
bcopy(a_cp, b_cp, cnt);
mmu_booke_kremove(mmu, copy_page_dst_va);
mmu_booke_kremove(mmu, copy_page_src_va);
a_offset += cnt;
b_offset += cnt;
xfersize -= cnt;
}
mtx_unlock(&copy_page_mutex);
}
/*
* mmu_booke_zero_page_idle zeros the specified hardware page by mapping it
* into virtual memory and using bzero to clear its contents. This is intended

8
sys/powerpc/powerpc/mmu_if.m
View File

@ -215,6 +215,14 @@ METHOD void copy_page {
vm_page_t _dst;
};
METHOD void copy_pages {
mmu_t _mmu;
vm_page_t *_ma;
vm_offset_t _a_offset;
vm_page_t *_mb;
vm_offset_t _b_offset;
int _xfersize;
};
/**
* @brief Create a mapping between a virtual/physical address pair in the

10
sys/powerpc/powerpc/pmap_dispatch.c
View File

@ -132,6 +132,16 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
MMU_COPY_PAGE(mmu_obj, src, dst);
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
CTR6(KTR_PMAP, "%s(%p, %#x, %p, %#x, %#x)", __func__, ma,
a_offset, mb, b_offset, xfersize);
MMU_COPY_PAGES(mmu_obj, ma, a_offset, mb, b_offset, xfersize);
}
void
pmap_enter(pmap_t pmap, vm_offset_t va, vm_prot_t access, vm_page_t p,
vm_prot_t prot, boolean_t wired)

8
sys/sparc64/sparc64/pmap.c
View File

@ -1918,6 +1918,14 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
}
}
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
vm_offset_t b_offset, int xfersize)
{
panic("pmap_copy_pages: not implemented");
}
/*
* Returns true if the pmap's pv is one of the first
* 16 pvs linked to from this page. This count may

2
sys/vm/pmap.h
View File

@ -108,6 +108,8 @@ void pmap_clear_modify(vm_page_t m);
void pmap_clear_reference(vm_page_t m);
void pmap_copy(pmap_t, pmap_t, vm_offset_t, vm_size_t, vm_offset_t);
void pmap_copy_page(vm_page_t, vm_page_t);
void pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset,
vm_page_t mb[], vm_offset_t b_offset, int xfersize);
void pmap_enter(pmap_t, vm_offset_t, vm_prot_t, vm_page_t,
vm_prot_t, boolean_t);
void pmap_enter_object(pmap_t pmap, vm_offset_t start,