Module Name: src
Committed By: reinoud
Date: Tue Dec 27 14:55:31 UTC 2011
Modified Files:
src/sys/arch/usermode/dev: cpu.c
src/sys/arch/usermode/usermode: machdep.c pmap.c vm_machdep.c
Log Message:
Implement physio() for NetBSD/usermode the right way!
To generate a diff of this commit:
cvs rdiff -u -r1.56 -r1.57 src/sys/arch/usermode/dev/cpu.c
cvs rdiff -u -r1.45 -r1.46 src/sys/arch/usermode/usermode/machdep.c
cvs rdiff -u -r1.82 -r1.83 src/sys/arch/usermode/usermode/pmap.c
cvs rdiff -u -r1.3 -r1.4 src/sys/arch/usermode/usermode/vm_machdep.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/usermode/dev/cpu.c
diff -u src/sys/arch/usermode/dev/cpu.c:1.56 src/sys/arch/usermode/dev/cpu.c:1.57
--- src/sys/arch/usermode/dev/cpu.c:1.56 Sat Dec 24 12:23:24 2011
+++ src/sys/arch/usermode/dev/cpu.c Tue Dec 27 14:55:31 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu.c,v 1.56 2011/12/24 12:23:24 reinoud Exp $ */
+/* $NetBSD: cpu.c,v 1.57 2011/12/27 14:55:31 reinoud Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <[email protected]>
@@ -30,7 +30,7 @@
#include "opt_hz.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.56 2011/12/24 12:23:24 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.57 2011/12/27 14:55:31 reinoud Exp $");
#include <sys/param.h>
#include <sys/conf.h>
@@ -379,16 +379,25 @@ cpu_initclocks(void)
void
cpu_startup(void)
{
+ vaddr_t minaddr, maxaddr;
size_t stacksize, msgbufsize = 32 * 1024;
void *stack_pagefault_ucp;
+ /* get ourself a message buffer */
um_msgbuf = kmem_zalloc(msgbufsize, KM_SLEEP);
if (um_msgbuf == NULL)
panic("couldn't allocate msgbuf");
initmsgbuf(um_msgbuf, msgbufsize);
+ /* allocate a submap for physio, 1Mb enough? */
+ minaddr = 0;
+ phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
+ 1024 * 1024, 0, false, NULL);
+
+ /* say hi! */
banner();
+ /* init lwp0 */
memset(&lwp0pcb, 0, sizeof(lwp0pcb));
if (thunk_getcontext(&lwp0pcb.pcb_ucp))
panic("getcontext failed");
Index: src/sys/arch/usermode/usermode/machdep.c
diff -u src/sys/arch/usermode/usermode/machdep.c:1.45 src/sys/arch/usermode/usermode/machdep.c:1.46
--- src/sys/arch/usermode/usermode/machdep.c:1.45 Mon Dec 26 21:22:23 2011
+++ src/sys/arch/usermode/usermode/machdep.c Tue Dec 27 14:55:31 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: machdep.c,v 1.45 2011/12/26 21:22:23 jmcneill Exp $ */
+/* $NetBSD: machdep.c,v 1.46 2011/12/27 14:55:31 reinoud Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <[email protected]>
@@ -38,7 +38,7 @@
#include "opt_sdl.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.45 2011/12/26 21:22:23 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.46 2011/12/27 14:55:31 reinoud Exp $");
#include <sys/types.h>
#include <sys/param.h>
@@ -62,6 +62,8 @@ char machine[_SYS_NMLN] = "";
char machine_arch[_SYS_NMLN] = "";
char module_machine_usermode[_SYS_NMLN] = "";
+struct vm_map *phys_map = NULL;
+
static char **saved_argv;
char *usermode_root_image_path = NULL;
static char usermode_tap_devicebuf[PATH_MAX] = "";
Index: src/sys/arch/usermode/usermode/pmap.c
diff -u src/sys/arch/usermode/usermode/pmap.c:1.82 src/sys/arch/usermode/usermode/pmap.c:1.83
--- src/sys/arch/usermode/usermode/pmap.c:1.82 Sun Dec 25 21:10:00 2011
+++ src/sys/arch/usermode/usermode/pmap.c Tue Dec 27 14:55:31 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.82 2011/12/25 21:10:00 reinoud Exp $ */
+/* $NetBSD: pmap.c,v 1.83 2011/12/27 14:55:31 reinoud Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <[email protected]>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.82 2011/12/25 21:10:00 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.83 2011/12/27 14:55:31 reinoud Exp $");
#include "opt_memsize.h"
#include "opt_kmempages.h"
@@ -648,9 +648,6 @@ pmap_page_deactivate(struct pv_entry *pv
uint32_t map_flags;
void *addr;
- if (pv->pv_vflags & PV_WIRED)
- return;
-
map_flags = THUNK_MAP_FILE | THUNK_MAP_FIXED | THUNK_MAP_SHARED;
addr = thunk_mmap((void *) va, PAGE_SIZE, THUNK_PROT_NONE,
map_flags, mem_fh, pa);
Index: src/sys/arch/usermode/usermode/vm_machdep.c
diff -u src/sys/arch/usermode/usermode/vm_machdep.c:1.3 src/sys/arch/usermode/usermode/vm_machdep.c:1.4
--- src/sys/arch/usermode/usermode/vm_machdep.c:1.3 Wed Aug 10 01:32:44 2011
+++ src/sys/arch/usermode/usermode/vm_machdep.c Tue Dec 27 14:55:31 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: vm_machdep.c,v 1.3 2011/08/10 01:32:44 jmcneill Exp $ */
+/* $NetBSD: vm_machdep.c,v 1.4 2011/12/27 14:55:31 reinoud Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <[email protected]>
@@ -27,21 +27,73 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.3 2011/08/10 01:32:44 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.4 2011/12/27 14:55:31 reinoud Exp $");
-#include <sys/types.h>
#include <sys/param.h>
-#include <sys/systm.h>
+#include <sys/buf.h>
+#include <sys/proc.h>
#include <uvm/uvm_extern.h>
+
+/*
+ * Map a user I/O request into kernel virtual address space.
+ * Note: the pages are already locked by uvm_vslock(), so we
+ * do not need to pass an access_type to pmap_enter().
+ */
+/* This code was originally stolen from the alpha/acorn26 port. */
+
int
vmapbuf(struct buf *bp, vsize_t len)
{
+ vaddr_t faddr, taddr, off;
+ paddr_t pa;
+ struct proc *p;
+ vm_prot_t prot;
+
+ if ((bp->b_flags & B_PHYS) == 0)
+ panic("vmapbuf");
+ p = bp->b_proc;
+ bp->b_saveaddr = bp->b_data;
+ faddr = trunc_page((vaddr_t)bp->b_data);
+ off = (vaddr_t)bp->b_data - faddr;
+ len = round_page(off + len);
+ taddr = uvm_km_alloc(phys_map, len, 0, UVM_KMF_VAONLY | UVM_KMF_WAITVA);
+ bp->b_data = (void *)(taddr + off);
+ len = atop(len);
+ prot = bp->b_flags & B_READ ? VM_PROT_READ | VM_PROT_WRITE :
+ VM_PROT_READ;
+ while (len--) {
+ if (pmap_extract(vm_map_pmap(&p->p_vmspace->vm_map), faddr,
+ &pa) == false)
+ panic("vmapbuf: null page frame");
+ pmap_enter(vm_map_pmap(phys_map), taddr, trunc_page(pa),
+ prot, prot | PMAP_WIRED);
+ faddr += PAGE_SIZE;
+ taddr += PAGE_SIZE;
+ }
+ pmap_update(vm_map_pmap(phys_map));
+
return 0;
}
+/*
+ * Unmap a previously-mapped user I/O request.
+ */
void
vunmapbuf(struct buf *bp, vsize_t len)
{
+ vaddr_t addr, off;
+
+ if ((bp->b_flags & B_PHYS) == 0)
+ panic("vunmapbuf");
+ addr = trunc_page((vaddr_t)bp->b_data);
+ off = (vaddr_t)bp->b_data - addr;
+ len = round_page(off + len);
+ pmap_remove(vm_map_pmap(phys_map), addr, addr + len);
+ pmap_update(vm_map_pmap(phys_map));
+ uvm_km_free(phys_map, addr, len, UVM_KMF_VAONLY);
+ bp->b_data = bp->b_saveaddr;
+ bp->b_saveaddr = NULL;
}
+
