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Changed vm_fault_quick in vm_machdep.c to be global. Needed for

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new pipe code.
This commit is contained in:
John Dyson 1996-02-04 22:09:12 +00:00
parent 267173e72d
commit dca5129987
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=13909
4 changed files with 28 additions and 28 deletions
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22
sys/amd64/amd64/vm_machdep.c
View File

@ -69,8 +69,6 @@
#include <i386/isa/isa.h>
static void vm_fault_quick __P((caddr_t v, int prot));
#ifdef BOUNCE_BUFFERS
static vm_offset_t
vm_bounce_kva __P((int size, int waitok));
@ -540,7 +538,7 @@ vm_bounce_init()
/*
* quick version of vm_fault
*/
static void
void
vm_fault_quick(v, prot)
caddr_t v;
int prot;
@ -564,8 +562,8 @@ int
cpu_fork(p1, p2)
register struct proc *p1, *p2;
{
struct pcb *pcb2 = &p2->p_addr->u_pcb;
int sp, offset;
register struct user *up = p2->p_addr;
int offset;
/*
* Copy pcb and stack from proc p1 to p2.
@ -573,25 +571,23 @@ cpu_fork(p1, p2)
* part of the stack. The stack and pcb need to agree;
* this is tricky, as the final pcb is constructed by savectx,
* but its frame isn't yet on the stack when the stack is copied.
* swtch compensates for this when the child eventually runs.
* This should be done differently, with a single call
* that copies and updates the pcb+stack,
* replacing the bcopy and savectx.
*/
__asm __volatile("movl %%esp,%0" : "=r" (sp));
offset = sp - (int)kstack;
p2->p_addr->u_pcb = p1->p_addr->u_pcb;
offset = mvesp() - (int)kstack;
bcopy((caddr_t)kstack + offset, (caddr_t)p2->p_addr + offset,
(unsigned) ctob(UPAGES) - offset);
p2->p_md.md_regs = p1->p_md.md_regs;
*pcb2 = p1->p_addr->u_pcb;
pcb2->pcb_cr3 = vtophys(p2->p_vmspace->vm_pmap.pm_pdir);
pmap_activate(&p2->p_vmspace->vm_pmap, &up->u_pcb);
/*
* Returns (0) in parent, (1) in child.
* Return (0) in parent, (1) in child.
*/
return (savectx(pcb2));
return (savectx(&up->u_pcb));
}
void

22
sys/i386/i386/vm_machdep.c
View File

@ -69,8 +69,6 @@
#include <i386/isa/isa.h>
static void vm_fault_quick __P((caddr_t v, int prot));
#ifdef BOUNCE_BUFFERS
static vm_offset_t
vm_bounce_kva __P((int size, int waitok));
@ -540,7 +538,7 @@ vm_bounce_init()
/*
* quick version of vm_fault
*/
static void
void
vm_fault_quick(v, prot)
caddr_t v;
int prot;
@ -564,8 +562,8 @@ int
cpu_fork(p1, p2)
register struct proc *p1, *p2;
{
struct pcb *pcb2 = &p2->p_addr->u_pcb;
int sp, offset;
register struct user *up = p2->p_addr;
int offset;
/*
* Copy pcb and stack from proc p1 to p2.
@ -573,25 +571,23 @@ cpu_fork(p1, p2)
* part of the stack. The stack and pcb need to agree;
* this is tricky, as the final pcb is constructed by savectx,
* but its frame isn't yet on the stack when the stack is copied.
* swtch compensates for this when the child eventually runs.
* This should be done differently, with a single call
* that copies and updates the pcb+stack,
* replacing the bcopy and savectx.
*/
__asm __volatile("movl %%esp,%0" : "=r" (sp));
offset = sp - (int)kstack;
p2->p_addr->u_pcb = p1->p_addr->u_pcb;
offset = mvesp() - (int)kstack;
bcopy((caddr_t)kstack + offset, (caddr_t)p2->p_addr + offset,
(unsigned) ctob(UPAGES) - offset);
p2->p_md.md_regs = p1->p_md.md_regs;
*pcb2 = p1->p_addr->u_pcb;
pcb2->pcb_cr3 = vtophys(p2->p_vmspace->vm_pmap.pm_pdir);
pmap_activate(&p2->p_vmspace->vm_pmap, &up->u_pcb);
/*
* Returns (0) in parent, (1) in child.
* Return (0) in parent, (1) in child.
*/
return (savectx(pcb2));
return (savectx(&up->u_pcb));
}
void

9
sys/kern/sys_pipe.c
View File

@ -185,6 +185,9 @@ free1:
return (error);
}
/*
* Allocate kva for pipe circular buffer, the space is pageable
*/
static void
pipespace(cpipe)
struct pipe *cpipe;
@ -464,7 +467,7 @@ pipe_build_write_buffer(wpipe, uio)
vm_page_t m;
vm_fault_quick( addr, VM_PROT_READ);
vm_fault_quick( (caddr_t) addr, VM_PROT_READ);
paddr = pmap_kextract(addr);
if (!paddr) {
int j;
@ -765,6 +768,10 @@ pipewrite(wpipe, uio, nbio)
wakeup(wpipe);
}
}
/*
* Don't return EPIPE if I/O was successful
*/
if ((wpipe->pipe_buffer.cnt == 0) &&
(uio->uio_resid == 0) &&
(error == EPIPE))

3
sys/vm/vm_extern.h
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)vm_extern.h 8.2 (Berkeley) 1/12/94
* $Id: vm_extern.h,v 1.21 1995/12/11 04:58:04 dyson Exp $
* $Id: vm_extern.h,v 1.22 1995/12/14 09:54:55 phk Exp $
*/
#ifndef _VM_EXTERN_H_
@ -104,6 +104,7 @@ void vslock __P((caddr_t, u_int));
void vsunlock __P((caddr_t, u_int, int));
void vm_object_print __P((/* db_expr_t */ int, boolean_t, /* db_expr_t */ int,
char *));
void vm_fault_quick __P((caddr_t v, int prot));
#endif /* KERNEL */