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Move bufpages to top of kernel vm space. allocate dead zone after buf 

pages so that it go larger than > 256MB.
This commit is contained in:
matt 2002-08-28 06:27:20 +00:00
parent e2d964c3ec
commit 05980fc1da
1 changed files with 21 additions and 15 deletions
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36
sys/arch/powerpc/mpc6xx/mpc6xx_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: mpc6xx_machdep.c,v 1.6 2002/08/25 20:21:41 thorpej Exp $ */
/* $NetBSD: mpc6xx_machdep.c,v 1.7 2002/08/28 06:27:20 matt Exp $ */
/*
* Copyright (C) 2002 Matt Thomas
@ -463,24 +463,13 @@ mpc6xx_startup(const char *model)
if (allocsys(v, NULL) - v != sz)
panic("startup: table size inconsistency");
/*
* allocate away the pages that map to 0xDEA[CDE]xxxx.
*/
minaddr = 0xDEAC0000;
error = uvm_map(kernel_map, &minaddr, 0x30000,
NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
UVM_ADV_NORMAL, UVM_FLAG_FIXED));
if (error || minaddr != 0xDEAC0000)
printf("mpc6xx_startup: failed to allocate DEAD "
"ZONE: error=%d\n", error);
/*
* Now allocate buffers proper. They are different than the above
* in that they usually occupy more virtual memory than physical.
* Allocate the buffer starting at the top of the kernel VM space.
*/
sz = MAXBSIZE * nbuf;
minaddr = 0;
minaddr = VM_MAX_KERNEL_ADDRESS - round_page(sz);
if (uvm_map(kernel_map, &minaddr, round_page(sz),
NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
@ -515,9 +504,26 @@ mpc6xx_startup(const char *model)
}
pmap_update(pmap_kernel());
/*
* Allocate away the pages that map to 0xDEA[CDE]xxxx. Do this after
* the bufpages are allocated in case they overlap since it's not
* fatal if we can't allocate these.
*/
minaddr = 0xDEAC0000;
error = uvm_map(kernel_map, &minaddr, 0x30000,
NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
UVM_ADV_NORMAL, UVM_FLAG_FIXED));
if (error != 0 || minaddr != 0xDEAC0000) {
printf("mpc6xx_startup: failed to allocate DEAD "
"ZONE: error=%d\n", error);
minaddr = 0;
}
/*
* Allocate a submap for exec arguments. This map effectively
* limits the number of processes exec'ing at any time.
* limits the number of processes exec'ing at any time. These
* submaps will be allocated after the dead zone.
*/
exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);