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Don't waste a page of KVA for the boot-time memory test on x86. For amd64,

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reuse the first page of the crashdumpmap as CMAP1/CADDR1.  For i386,
remove CMAP1/CADDR1 entirely and reuse CMAP3/CADDR3 for the memory test.

Reviewed by:	alc, peter
MFC after:	2 weeks
This commit is contained in:
John Baldwin 2014-02-11 22:02:40 +00:00
parent 2db08c03f0
commit 4f67a8c5e9
6 changed files with 16 additions and 21 deletions
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13
sys/amd64/amd64/pmap.c
View File

@ -812,7 +812,7 @@ void
pmap_bootstrap(vm_paddr_t *firstaddr)
{
vm_offset_t va;
pt_entry_t *pte, *unused;
pt_entry_t *pte;
/*
* Create an initial set of page tables to run the kernel in.
@ -858,14 +858,11 @@ pmap_bootstrap(vm_paddr_t *firstaddr)
pte = vtopte(va);
/*
* CMAP1 is only used for the memory test.
* Crashdump maps. The first page is reused as CMAP1 for the
* memory test.
*/
SYSMAP(caddr_t, CMAP1, CADDR1, 1)
/*
* Crashdump maps.
*/
SYSMAP(caddr_t, unused, crashdumpmap, MAXDUMPPGS)
SYSMAP(caddr_t, CMAP1, crashdumpmap, MAXDUMPPGS)
CADDR1 = crashdumpmap;
virtual_avail = va;

4
sys/i386/i386/machdep.c
View File

@ -2403,7 +2403,7 @@ getmemsize(int first)
phys_avail[pa_indx++] = physmap[0];
phys_avail[pa_indx] = physmap[0];
dump_avail[da_indx] = physmap[0];
pte = CMAP1;
pte = CMAP3;
/*
* Get dcons buffer address
@ -2425,7 +2425,7 @@ getmemsize(int first)
end = trunc_page(physmap[i + 1]);
for (pa = round_page(physmap[i]); pa < end; pa += PAGE_SIZE) {
int tmp, page_bad, full;
int *ptr = (int *)CADDR1;
int *ptr = (int *)CADDR3;
full = FALSE;
/*

8
sys/i386/i386/pmap.c
View File

@ -256,11 +256,10 @@ struct sysmaps {
caddr_t CADDR2;
};
static struct sysmaps sysmaps_pcpu[MAXCPU];
pt_entry_t *CMAP1 = 0;
static pt_entry_t *CMAP3;
pt_entry_t *CMAP3;
static pd_entry_t *KPTD;
caddr_t CADDR1 = 0, ptvmmap = 0;
static caddr_t CADDR3;
caddr_t ptvmmap = 0;
caddr_t CADDR3;
struct msgbuf *msgbufp = 0;
/*
@ -434,7 +433,6 @@ pmap_bootstrap(vm_paddr_t firstaddr)
SYSMAP(caddr_t, sysmaps->CMAP1, sysmaps->CADDR1, 1)
SYSMAP(caddr_t, sysmaps->CMAP2, sysmaps->CADDR2, 1)
}
SYSMAP(caddr_t, CMAP1, CADDR1, 1)
SYSMAP(caddr_t, CMAP3, CADDR3, 1)
/*

4
sys/i386/include/pmap.h
View File

@ -420,8 +420,8 @@ struct pv_chunk {
#ifdef _KERNEL
extern caddr_t CADDR1;
extern pt_entry_t *CMAP1;
extern caddr_t CADDR3;
extern pt_entry_t *CMAP3;
extern vm_paddr_t phys_avail[];
extern vm_paddr_t dump_avail[];
extern int pseflag;

4
sys/i386/xen/pmap.c
View File

@ -249,9 +249,9 @@ struct sysmaps {
caddr_t CADDR2;
};
static struct sysmaps sysmaps_pcpu[MAXCPU];
static pt_entry_t *CMAP3;
pt_entry_t *CMAP3;
caddr_t ptvmmap = 0;
static caddr_t CADDR3;
caddr_t CADDR3;
struct msgbuf *msgbufp = 0;
/*

4
sys/pc98/pc98/machdep.c
View File

@ -1961,7 +1961,7 @@ getmemsize(int first)
phys_avail[pa_indx++] = physmap[0];
phys_avail[pa_indx] = physmap[0];
dump_avail[da_indx] = physmap[0];
pte = CMAP1;
pte = CMAP3;
/*
* Get dcons buffer address
@ -1982,7 +1982,7 @@ getmemsize(int first)
end = trunc_page(physmap[i + 1]);
for (pa = round_page(physmap[i]); pa < end; pa += PAGE_SIZE) {
int tmp, page_bad, full;
int *ptr = (int *)CADDR1;
int *ptr = (int *)CADDR3;
full = FALSE;
/*