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223 commits

Author SHA1 Message Date
Ben Gras
f86da99e67 map in kernel in 4MB, global-bit-set 'pages' if hardware 
supports it. helps performance.

broken use of region data structure for kernel mapping to be fixed.
 2009-05-18 15:34:42 +00:00
Ben Gras
bdab3c4cfb Library call for cpu features; make kernel and vm use this to query cpu 
features (specifically: 4MB pages and TLB global bit).  Only enable
these features in CR4 if available. 4MB pages to be used in the near
future.
 2009-05-15 17:07:36 +00:00
Ben Gras
909c1bb8a7 don't bother with unmapping physical memory in non-sanitycheck mode. 2009-05-12 11:51:53 +00:00
Ben Gras
581e68433a basic sparepage optimisation 
some simplification of linear/virtual address translation
(less hardcoding and more use of arch_*2* functions)
 2009-05-12 11:38:29 +00:00
Ben Gras
f9e81cb57b remove bogus arch_map2vir calls 2009-05-12 11:36:15 +00:00
Ben Gras
6fad23f500 don't call this function with a bogus addr (done by region.c print code) 2009-05-12 11:35:49 +00:00
Ben Gras
d2caeb6146 start all processes, including VM, in VM_PROCSTART in linear address space, 
to make space for kernel to be able to map in things below there.
 2009-05-11 19:11:37 +00:00
Ben Gras
ade4c03b73 Don't build arch objs more than once. 2009-05-11 19:05:45 +00:00
Ben Gras
ef8a741301 set global flag for kernel pages, so tlb entries for kernel aren't thrown 
away on cr3 reload. minor optimization.
 2009-04-23 15:11:16 +00:00
Ben Gras
2dd02cc560 mark pages whose refcount were >1 and drop to 1 and are 
read/write writable in the pagetable right away instead of waiting for
a pagefault. minor optimization.

some a sanity check of SLAB-allocated pointers.

vm gets its own _exit and __exit like PM, so the stock (library) panic works.
 2009-04-22 12:39:29 +00:00
Ben Gras
dc9a1bc30c increment nph when printing physical regions; suggested by Guanqun Lu 2009-03-31 14:26:24 +00:00
Ben Gras
59e972f074 let drivers allocate memory at 64k physical boundary. 2009-02-12 12:26:08 +00:00
Ben Gras
c628f24bc2 moved stacktrace to sysctl, as vmctl is very privileged so can't 
be used outside VM. IS code cleanup. added stacktrace feature to IS.
 2009-01-27 12:54:33 +00:00
Ben Gras
539192f4c3 must be unsigned for base+limit check to to work 2009-01-22 13:05:20 +00:00
Ben Gras
866a4a667e phys addr arg of 0 must be possible for pt_writemap too (instead of meaning 
unmap).
 2008-12-19 13:29:12 +00:00
Ben Gras
8072ef5509 oops, shouldn't be on in svn. 2008-12-18 17:42:29 +00:00
Ben Gras
3121eec6bd . map text (kernel's and processes') in readonly 
. map kernel in non-user
 . don't map in first pages of kernel code and data
   if possible

these first pages could actually be freed but as the
kernel isn't allowed to touch them either we can't reuse
them until VM has totally taken over page table management
and kernel doesn't rely on identity mapping any more.
 2008-12-18 15:35:22 +00:00
Ben Gras
710f44c4b8 added code for debugging pagefaults 2008-12-16 14:33:53 +00:00
Ben Gras
e4e3995fb0 don't force vm to print to serial; don't kill processes when they 
have 'bad' memory ranges (as it's the requestor's fault)
 2008-12-11 17:36:33 +00:00
Ben Gras
68d0c4defe - code shared with exec() letting boot-time processes have 
their own fully fledged virtual address space and freeing
   their pre-allocated heap+stack area (necessary to let memory
   driver map in arbitrary areas of memory for /dev/mem without
   sys_vm_map)
 - small optimization preallocating memory on exec
 - finished VR_DIRECT physical mapping code
 2008-12-08 16:43:20 +00:00
Ben Gras
9b33056d2b make allocmem accept and return values in bytes, ramdisk expects this. 2008-11-19 15:40:17 +00:00
Ben Gras
6c92081a5a paged mode is default. 2008-11-19 13:19:37 +00:00
Ben Gras
c078ec0331 Basic VM and other minor improvements. 
Not complete, probably not fully debugged or optimized.
 2008-11-19 12:26:10 +00:00