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- Fix kseg0 address calculation - it doesn't always start at

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page boundary
- Add cache ops to ensure memory validity before/after
    copy operation
This commit is contained in:
Oleksandr Tymoshenko 2010-05-26 22:38:45 +00:00
parent 241e22a783
commit 522c90a143
1 changed files with 11 additions and 1 deletions
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12
sys/mips/mips/uio_machdep.c
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@ -51,6 +51,8 @@ __FBSDID("$FreeBSD$");
#include <vm/vm_page.h>
#include <vm/vm_param.h>
#include <machine/cache.h>
/*
* Implement uiomove(9) from physical memory using a combination
* of the direct mapping and sf_bufs to reduce the creation and
@ -91,8 +93,14 @@ uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio)
m = ma[offset >> PAGE_SHIFT];
pa = VM_PAGE_TO_PHYS(m);
if (pa < MIPS_KSEG0_LARGEST_PHYS) {
cp = (char *)MIPS_PHYS_TO_KSEG0(pa);
sf = NULL;
cp = (char *)MIPS_PHYS_TO_KSEG0(pa) + page_offset;
/*
* flush all mappings to this page, KSEG0 address first
* in order to get it overwritten by correct data
*/
mips_dcache_wbinv_range((vm_offset_t)cp, cnt);
pmap_flush_pvcache(m);
} else {
sf = sf_buf_alloc(m, 0);
cp = (char *)sf_buf_kva(sf) + page_offset;
@ -122,6 +130,8 @@ uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio)
}
if (sf != NULL)
sf_buf_free(sf);
else
mips_dcache_wbinv_range((vm_offset_t)cp, cnt);
iov->iov_base = (char *)iov->iov_base + cnt;
iov->iov_len -= cnt;
uio->uio_resid -= cnt;