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-rw-r--r--debian/patches/700001-70_dde.patch.patch819
1 files changed, 819 insertions, 0 deletions
diff --git a/debian/patches/700001-70_dde.patch.patch b/debian/patches/700001-70_dde.patch.patch
new file mode 100644
index 0000000..4c8e3a0
--- /dev/null
+++ b/debian/patches/700001-70_dde.patch.patch
@@ -0,0 +1,819 @@
+From 9ad7eb46b65b7324dd5f2c6f5568b6a0e033a5f4 Mon Sep 17 00:00:00 2001
+From: Justus Winter <justus@gnupg.org>
+Date: Thu, 25 Feb 2016 18:46:32 +0100
+Subject: [PATCH gnumach 1/8] 70_dde.patch
+
+---
+ Makefrag.am | 9 ++
+ device/ds_routines.c | 55 +++++++++++
+ device/ds_routines.h | 3 +
+ device/intr.c | 198 +++++++++++++++++++++++++++++++++++++++
+ include/device/intr.h | 17 ++++
+ include/mach/experimental.defs | 100 ++++++++++++++++++++
+ kern/experimental.srv | 3 +
+ kern/ipc_kobject.c | 3 +
+ kern/startup.c | 4 +
+ linux/dev/arch/i386/kernel/irq.c | 81 +++++++++++++++-
+ linux/dev/drivers/block/genhd.c | 4 +-
+ vm/vm_user.c | 103 ++++++++++++++++++++
+ 12 files changed, 578 insertions(+), 2 deletions(-)
+ create mode 100644 device/intr.c
+ create mode 100644 include/device/intr.h
+ create mode 100644 include/mach/experimental.defs
+ create mode 100644 kern/experimental.srv
+
+diff --git a/Makefrag.am b/Makefrag.am
+index 9a68af8..de11a71 100644
+--- a/Makefrag.am
++++ b/Makefrag.am
+@@ -220,6 +220,7 @@ EXTRA_DIST += \
+ kern/mach.srv \
+ kern/mach4.srv \
+ kern/gnumach.srv \
++ kern/experimental.srv \
+ kern/mach_debug.srv \
+ kern/mach_host.srv \
+ kern/task_notify.cli
+@@ -304,6 +305,7 @@ libkernel_a_SOURCES += \
+ device/device_types_kernel.h \
+ device/ds_routines.c \
+ device/ds_routines.h \
++ device/intr.c \
+ device/if_ether.h \
+ device/if_hdr.h \
+ device/io_req.h \
+@@ -352,6 +354,7 @@ include_device_HEADERS = \
+ include/device/device_types.defs \
+ include/device/device_types.h \
+ include/device/disk_status.h \
++ include/device/intr.h \
+ include/device/net_status.h \
+ include/device/tape_status.h \
+ include/device/tty_status.h
+@@ -374,6 +377,7 @@ include_mach_HEADERS = \
+ include/mach/memory_object_default.defs \
+ include/mach/notify.defs \
+ include/mach/std_types.defs \
++ include/mach/experimental.defs \
+ include/mach/alert.h \
+ include/mach/boolean.h \
+ include/mach/boot.h \
+@@ -522,6 +526,7 @@ nodist_lib_dep_tr_for_defs_a_SOURCES += \
+ kern/mach.server.defs.c \
+ kern/mach4.server.defs.c \
+ kern/gnumach.server.defs.c \
++ kern/experimental.server.defs.c \
+ kern/mach_debug.server.defs.c \
+ kern/mach_host.server.defs.c
+ nodist_libkernel_a_SOURCES += \
+@@ -534,6 +539,9 @@ nodist_libkernel_a_SOURCES += \
+ kern/gnumach.server.h \
+ kern/gnumach.server.c \
+ kern/gnumach.server.msgids \
++ kern/experimental.server.h \
++ kern/experimental.server.c \
++ kern/experimental.server.msgids \
+ kern/mach_debug.server.h \
+ kern/mach_debug.server.c \
+ kern/mach_debug.server.msgids \
+@@ -543,6 +551,7 @@ nodist_libkernel_a_SOURCES += \
+ # kern/mach.server.defs
+ # kern/mach4.server.defs
+ # kern/gnumach.server.defs
++# kern/experimental.server.defs
+ # kern/mach_debug.server.defs
+ # kern/mach_host.server.defs
+
+diff --git a/device/ds_routines.c b/device/ds_routines.c
+index dbff7f8..4f6b345 100644
+--- a/device/ds_routines.c
++++ b/device/ds_routines.c
+@@ -318,6 +318,43 @@ ds_device_map (device_t dev, vm_prot_t prot, vm_offset_t offset,
+ offset, size, pager, unmap);
+ }
+
++io_return_t
++experimental_device_intr_register (ipc_port_t master_port, int line,
++ int id, int flags, ipc_port_t receive_port)
++{
++#ifdef MACH_XEN
++ return D_INVALID_OPERATION;
++#else /* MACH_XEN */
++ extern int install_user_intr_handler (unsigned int line,
++ unsigned long flags,
++ ipc_port_t dest);
++ io_return_t ret;
++
++ /* Open must be called on the master device port. */
++ if (master_port != master_device_port)
++ return D_INVALID_OPERATION;
++
++ /* XXX: move to arch-specific */
++ if (line < 0 || line >= 16)
++ return D_INVALID_OPERATION;
++
++ ret = insert_intr_entry (line, receive_port);
++ if (ret)
++ return ret;
++ // TODO The original port should be replaced
++ // when the same device driver calls it again,
++ // in order to handle the case that the device driver crashes and restarts.
++ ret = install_user_intr_handler (line, flags, receive_port);
++
++ /* If the port is installed successfully, increase its reference by 1.
++ * Thus, the port won't be destroyed after its task is terminated. */
++ if (ret == 0)
++ ip_reference (receive_port);
++
++ return ret;
++#endif /* MACH_XEN */
++}
++
+ boolean_t
+ ds_notify (mach_msg_header_t *msg)
+ {
+@@ -1798,6 +1835,24 @@ device_writev_trap (mach_device_t device, dev_mode_t mode,
+ return (result);
+ }
+
++kern_return_t
++experimental_device_intr_enable(ipc_port_t master_port, int line, char status)
++{
++#ifdef MACH_XEN
++ return D_INVALID_OPERATION;
++#else /* MACH_XEN */
++ if (master_port != master_device_port)
++ return D_INVALID_OPERATION;
++
++ if (status)
++ /* TODO: better name for generic-to-arch-specific call */
++ enable_irq (line);
++ else
++ disable_irq (line);
++ return 0;
++#endif /* MACH_XEN */
++}
++
+ struct device_emulation_ops mach_device_emulation_ops =
+ {
+ (void*) mach_device_reference,
+diff --git a/device/ds_routines.h b/device/ds_routines.h
+index c0543cb..e9f115f 100644
+--- a/device/ds_routines.h
++++ b/device/ds_routines.h
+@@ -83,4 +83,7 @@ io_return_t ds_device_writev_trap(
+ io_buf_vec_t *iovec,
+ vm_size_t count);
+
++/* XXX arch-specific */
++extern ipc_port_t intr_rcv_ports[16];
++
+ #endif /* DS_ROUTINES_H */
+diff --git a/device/intr.c b/device/intr.c
+new file mode 100644
+index 0000000..6fca328
+--- /dev/null
++++ b/device/intr.c
+@@ -0,0 +1,198 @@
++#include <device/intr.h>
++#include <device/ds_routines.h>
++#include <kern/queue.h>
++#include <kern/printf.h>
++
++#ifndef MACH_XEN
++// TODO this is only for x86 system
++#define sti() __asm__ __volatile__ ("sti": : :"memory")
++#define cli() __asm__ __volatile__ ("cli": : :"memory")
++
++static boolean_t deliver_intr (int line, ipc_port_t dest_port);
++
++struct intr_entry
++{
++ queue_chain_t chain;
++ ipc_port_t dest;
++ int line;
++ /* The number of interrupts occur since last run of intr_thread. */
++ int interrupts;
++};
++
++static queue_head_t intr_queue;
++/* The total number of unprocessed interrupts. */
++static int tot_num_intr;
++
++static struct intr_entry *
++search_intr (int line, ipc_port_t dest)
++{
++ struct intr_entry *e;
++ queue_iterate (&intr_queue, e, struct intr_entry *, chain)
++ {
++ if (e->dest == dest && e->line == line)
++ return e;
++ }
++ return NULL;
++}
++
++/* This function can only be used in the interrupt handler. */
++void
++queue_intr (int line, ipc_port_t dest)
++{
++ extern void intr_thread ();
++ struct intr_entry *e;
++
++ cli ();
++ e = search_intr (line, dest);
++ assert (e);
++ e->interrupts++;
++ tot_num_intr++;
++ sti ();
++
++ thread_wakeup ((event_t) &intr_thread);
++}
++
++/* insert an interrupt entry in the queue.
++ * This entry exists in the queue until
++ * the corresponding interrupt port is removed.*/
++int
++insert_intr_entry (int line, ipc_port_t dest)
++{
++ int err = 0;
++ struct intr_entry *e, *new;
++ int free = 0;
++
++ new = (struct intr_entry *) kalloc (sizeof (*new));
++ if (new == NULL)
++ return D_NO_MEMORY;
++
++ /* check whether the intr entry has been in the queue. */
++ cli ();
++ e = search_intr (line, dest);
++ if (e)
++ {
++ printf ("the interrupt entry for line %d and port %p has been inserted\n",
++ line, dest);
++ free = 1;
++ err = D_ALREADY_OPEN;
++ goto out;
++ }
++ new->line = line;
++ new->dest = dest;
++ new->interrupts = 0;
++ queue_enter (&intr_queue, new, struct intr_entry *, chain);
++out:
++ sti ();
++ if (free)
++ kfree ((vm_offset_t) new, sizeof (*new));
++ return err;
++}
++
++/* this function should be called when line is disabled. */
++void mark_intr_removed (int line, ipc_port_t dest)
++{
++ struct intr_entry *e;
++
++ e = search_intr (line, dest);
++ if (e)
++ e->dest = NULL;
++}
++
++void
++intr_thread ()
++{
++ struct intr_entry *e;
++ int line;
++ ipc_port_t dest;
++ queue_init (&intr_queue);
++
++ for (;;)
++ {
++ assert_wait ((event_t) &intr_thread, FALSE);
++ cli ();
++ while (tot_num_intr)
++ {
++ int del = 0;
++
++ queue_iterate (&intr_queue, e, struct intr_entry *, chain)
++ {
++ /* if an entry doesn't have dest port,
++ * we should remove it. */
++ if (e->dest == NULL)
++ {
++ del = 1;
++ break;
++ }
++
++ if (e->interrupts)
++ {
++ line = e->line;
++ dest = e->dest;
++ e->interrupts--;
++ tot_num_intr--;
++
++ sti ();
++ deliver_intr (line, dest);
++ cli ();
++ }
++ }
++
++ /* remove the entry without dest port from the queue and free it. */
++ if (del)
++ {
++ assert (!queue_empty (&intr_queue));
++ queue_remove (&intr_queue, e, struct intr_entry *, chain);
++ sti ();
++ kfree ((vm_offset_t) e, sizeof (*e));
++ cli ();
++ }
++ }
++ sti ();
++ thread_block (NULL);
++ }
++}
++
++static boolean_t
++deliver_intr (int line, ipc_port_t dest_port)
++{
++ ipc_kmsg_t kmsg;
++ mach_intr_notification_t *n;
++ mach_port_t dest = (mach_port_t) dest_port;
++
++ if (dest == MACH_PORT_NULL)
++ return FALSE;
++
++ kmsg = ikm_alloc(sizeof *n);
++ if (kmsg == IKM_NULL)
++ return FALSE;
++
++ ikm_init(kmsg, sizeof *n);
++ n = (mach_intr_notification_t *) &kmsg->ikm_header;
++
++ mach_msg_header_t *m = &n->intr_header;
++ mach_msg_type_t *t = &n->intr_type;
++
++ m->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_PORT_SEND, 0);
++ m->msgh_size = sizeof *n;
++ m->msgh_seqno = INTR_NOTIFY_MSGH_SEQNO;
++ m->msgh_local_port = MACH_PORT_NULL;
++ m->msgh_remote_port = MACH_PORT_NULL;
++ m->msgh_id = MACH_INTR_NOTIFY;
++
++ t->msgt_name = MACH_MSG_TYPE_INTEGER_32;
++ t->msgt_size = 32;
++ t->msgt_number = 1;
++ t->msgt_inline = TRUE;
++ t->msgt_longform = FALSE;
++ t->msgt_deallocate = FALSE;
++ t->msgt_unused = 0;
++
++ n->intr_header.msgh_remote_port = dest;
++ n->line = line;
++
++ ipc_port_copy_send (dest_port);
++ ipc_mqueue_send_always(kmsg);
++
++ return TRUE;
++}
++#endif /* MACH_XEN */
+diff --git a/include/device/intr.h b/include/device/intr.h
+new file mode 100644
+index 0000000..a02b64c
+--- /dev/null
++++ b/include/device/intr.h
+@@ -0,0 +1,17 @@
++#ifndef __INTR_H__
++
++#define __INTR_H__
++
++#include <device/device_types.h>
++
++typedef struct
++{
++ mach_msg_header_t intr_header;
++ mach_msg_type_t intr_type;
++ int line;
++} mach_intr_notification_t;
++
++#define INTR_NOTIFY_MSGH_SEQNO 0
++#define MACH_INTR_NOTIFY 424242
++
++#endif
+diff --git a/include/mach/experimental.defs b/include/mach/experimental.defs
+new file mode 100644
+index 0000000..ca1eb92
+--- /dev/null
++++ b/include/mach/experimental.defs
+@@ -0,0 +1,100 @@
++/*
++ * Mach Operating System
++ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
++ * All Rights Reserved.
++ *
++ * Permission to use, copy, modify and distribute this software and its
++ * documentation is hereby granted, provided that both the copyright
++ * notice and this permission notice appear in all copies of the
++ * software, derivative works or modified versions, and any portions
++ * thereof, and that both notices appear in supporting documentation.
++ *
++ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
++ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
++ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
++ *
++ * Carnegie Mellon requests users of this software to return to
++ *
++ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
++ * School of Computer Science
++ * Carnegie Mellon University
++ * Pittsburgh PA 15213-3890
++ *
++ * any improvements or extensions that they make and grant Carnegie Mellon
++ * the rights to redistribute these changes.
++ */
++
++subsystem
++#if KERNEL_USER
++ KernelUser
++#endif /* KERNEL_USER */
++#if KERNEL_SERVER
++ KernelServer
++#endif /* KERNEL_SERVER */
++ experimental 424242;
++
++#include <mach/std_types.defs>
++#include <mach/mach_types.defs>
++
++serverprefix experimental_;
++
++type notify_port_t = MACH_MSG_TYPE_MOVE_SEND_ONCE
++ ctype: mach_port_t;
++
++skip; /*simpleroutine mach_intr_notify(
++ notify : notify_port_t;
++ name : int);*/
++
++routine device_intr_register(
++ master_port : mach_port_t;
++ in line : int;
++ in id : int;
++ in flags : int;
++ in receive_port : mach_port_send_t
++ );
++
++/*
++ * enable/disable the specified line.
++ */
++/* XXX: Naming a function taht can disable something "xxx_enable" is confusing. */
++/* Is the disable part actually used at all? AIUI, the kernel IRQ handler
++should always disable the line; and the userspace driver only has to
++reenable it, after acknowledging and handling the interrupt...
++*/
++routine device_intr_enable(
++ master_port : mach_port_t;
++ line : int;
++ status : char);
++
++/*
++ * This routine is created for allocating DMA buffers.
++ * We are going to get a contiguous physical memory
++ * and its physical address in addition to the virtual address.
++ */
++
++ /* XXX
++ This RPC lacks a few additional constraints like boundaries, alignment
++and maybe phase. We may not use them now, but they're important for
++portability (e.g. if GNU Mach supports PAE, drivers that can't use
++physical memory beyond the 4 GiB limit must be able to express it).
++
++> What do you mean by "phase"?
++
++Offset from the alignment. But I don't think it's useful at all in this
++case. Minimum and maximum addresses and alignment should do. Maybe
++boundary crossing but usually, specifying the right alignment and size
++is enough.
++
++For upstream
++inclusion, we need to do it properly: the RPC should return a special
++memory object (similar to device_map() ), which can then be mapped into
++the process address space with vm_map() like any other memory object.
++
++phys_address_t?
++ */
++routine vm_allocate_contiguous(
++ host_priv : host_priv_t;
++ target_task : vm_task_t;
++ out vaddr : vm_address_t;
++ out paddr : vm_address_t;
++ size : vm_size_t);
+diff --git a/kern/experimental.srv b/kern/experimental.srv
+new file mode 100644
+index 0000000..2ccfd78
+--- /dev/null
++++ b/kern/experimental.srv
+@@ -0,0 +1,3 @@
++#define KERNEL_SERVER 1
++
++#include <mach/experimental.defs>
+diff --git a/kern/ipc_kobject.c b/kern/ipc_kobject.c
+index 709ec9e..c65458b 100644
+--- a/kern/ipc_kobject.c
++++ b/kern/ipc_kobject.c
+@@ -56,6 +56,7 @@
+ #include <device/device_pager.server.h>
+ #include <kern/mach4.server.h>
+ #include <kern/gnumach.server.h>
++#include <kern/experimental.server.h>
+
+ #if MACH_DEBUG
+ #include <kern/mach_debug.server.h>
+@@ -159,6 +160,7 @@ ipc_kobject_server(request)
+ * to perform the kernel function
+ */
+ {
++ extern mig_routine_t experimental_server_routine();
+ check_simple_locks();
+ if ((routine = mach_server_routine(&request->ikm_header)) != 0
+ || (routine = mach_port_server_routine(&request->ikm_header)) != 0
+@@ -170,6 +172,7 @@ ipc_kobject_server(request)
+ #endif /* MACH_DEBUG */
+ || (routine = mach4_server_routine(&request->ikm_header)) != 0
+ || (routine = gnumach_server_routine(&request->ikm_header)) != 0
++ || (routine = experimental_server_routine(&request->ikm_header)) != 0
+ #if MACH_MACHINE_ROUTINES
+ || (routine = MACHINE_SERVER_ROUTINE(&request->ikm_header)) != 0
+ #endif /* MACH_MACHINE_ROUTINES */
+diff --git a/kern/startup.c b/kern/startup.c
+index bd29694..05de5e6 100644
+--- a/kern/startup.c
++++ b/kern/startup.c
+@@ -79,6 +79,7 @@ boolean_t reboot_on_panic = TRUE;
+ /* XX */
+ extern vm_offset_t phys_first_addr, phys_last_addr;
+ extern char *kernel_cmdline;
++extern void intr_thread();
+
+ /*
+ * Running in virtual memory, on the interrupt stack.
+@@ -221,6 +222,9 @@ void start_kernel_threads(void)
+ (void) kernel_thread(kernel_task, reaper_thread, (char *) 0);
+ (void) kernel_thread(kernel_task, swapin_thread, (char *) 0);
+ (void) kernel_thread(kernel_task, sched_thread, (char *) 0);
++#ifndef MACH_XEN
++ (void) kernel_thread(kernel_task, intr_thread, (char *)0);
++#endif /* MACH_XEN */
+
+ #if NCPUS > 1
+ /*
+diff --git a/linux/dev/arch/i386/kernel/irq.c b/linux/dev/arch/i386/kernel/irq.c
+index 7753814..b7dfa1a 100644
+--- a/linux/dev/arch/i386/kernel/irq.c
++++ b/linux/dev/arch/i386/kernel/irq.c
+@@ -83,6 +83,7 @@ struct linux_action
+ void *dev_id;
+ struct linux_action *next;
+ unsigned long flags;
++ volatile ipc_port_t delivery_port;
+ };
+
+ static struct linux_action *irq_action[16] =
+@@ -102,6 +103,7 @@ linux_intr (int irq)
+ {
+ struct pt_regs regs;
+ struct linux_action *action = *(irq_action + irq);
++ struct linux_action **prev = &irq_action[irq];
+ unsigned long flags;
+
+ kstat.interrupts[irq]++;
+@@ -113,7 +115,37 @@ linux_intr (int irq)
+
+ while (action)
+ {
+- action->handler (irq, action->dev_id, &regs);
++ // TODO I might need to check whether the interrupt belongs to
++ // the current device. But I don't do it for now.
++ if (action->delivery_port)
++ {
++ /* The reference of the port was increased
++ * when the port was installed.
++ * If the reference is 1, it means the port should
++ * have been destroyed and I destroy it now. */
++ if (action->delivery_port
++ && action->delivery_port->ip_references == 1)
++ {
++ mark_intr_removed (irq, action->delivery_port);
++ ipc_port_release (action->delivery_port);
++ *prev = action->next;
++ printk ("irq handler %d: release an dead delivery port\n", irq);
++ linux_kfree(action);
++ action = *prev;
++ continue;
++ }
++ else
++ {
++ /* We disable the irq here and it will be enabled
++ * after the interrupt is handled by the user space driver. */
++ disable_irq (irq);
++ queue_intr (irq, action->delivery_port);
++ }
++
++ }
++ else if (action->handler)
++ action->handler (irq, action->dev_id, &regs);
++ prev = &action->next;
+ action = action->next;
+ }
+
+@@ -233,6 +265,7 @@ setup_x86_irq (int irq, struct linux_action *new)
+ }
+ while (old);
+ shared = 1;
++ printk("store a new irq %d\n", irq);
+ }
+
+ save_flags (flags);
+@@ -250,6 +283,51 @@ setup_x86_irq (int irq, struct linux_action *new)
+ return 0;
+ }
+
++int
++install_user_intr_handler (unsigned int irq, unsigned long flags,
++ ipc_port_t dest)
++{
++ struct linux_action *action;
++ struct linux_action *old;
++ int retval;
++
++ assert (irq < 16);
++
++ /* Test whether the irq handler has been set */
++ // TODO I need to protect the array when iterating it.
++ old = irq_action[irq];
++ while (old)
++ {
++ if (old->delivery_port == dest)
++ {
++ printk ("The interrupt handler has been installed on line %d", irq);
++ return linux_to_mach_error (-EAGAIN);
++ }
++ old = old->next;
++ }
++
++ /*
++ * Hmm... Should I use `kalloc()' ?
++ * By OKUJI Yoshinori.
++ */
++ action = (struct linux_action *)
++ linux_kmalloc (sizeof (struct linux_action), GFP_KERNEL);
++ if (action == NULL)
++ return linux_to_mach_error (-ENOMEM);
++
++ action->handler = NULL;
++ action->next = NULL;
++ action->dev_id = NULL;
++ action->flags = flags;
++ action->delivery_port = dest;
++
++ retval = setup_x86_irq (irq, action);
++ if (retval)
++ linux_kfree (action);
++
++ return linux_to_mach_error (retval);
++}
++
+ /*
+ * Attach a handler to an IRQ.
+ */
+@@ -278,6 +356,7 @@ request_irq (unsigned int irq, void (*handler) (int, void *, struct pt_regs *),
+ action->next = NULL;
+ action->dev_id = dev_id;
+ action->flags = flags;
++ action->delivery_port = NULL;
+
+ retval = setup_x86_irq (irq, action);
+ if (retval)
+diff --git a/linux/dev/drivers/block/genhd.c b/linux/dev/drivers/block/genhd.c
+index 3a86138..4a36f7f 100644
+--- a/linux/dev/drivers/block/genhd.c
++++ b/linux/dev/drivers/block/genhd.c
+@@ -812,7 +812,9 @@ void device_setup(void)
+ #ifdef MACH
+ linux_intr_pri = SPL6;
+ #endif
+- net_dev_init();
++ extern char *kernel_cmdline;
++ if (!strstr(kernel_cmdline, " nonetdev"))
++ net_dev_init();
+ #endif
+ #ifndef MACH
+ console_map_init();
+diff --git a/vm/vm_user.c b/vm/vm_user.c
+index e65f6d5..788f43a 100644
+--- a/vm/vm_user.c
++++ b/vm/vm_user.c
+@@ -449,3 +449,106 @@ kern_return_t vm_wire(port, map, start, size, access)
+ round_page(start+size),
+ access);
+ }
++
++kern_return_t experimental_vm_allocate_contiguous(host_priv, map, result_vaddr, result_paddr, size)
++ host_t host_priv;
++ vm_map_t map;
++ vm_address_t *result_vaddr;
++ vm_address_t *result_paddr;
++ vm_size_t size;
++{
++ unsigned int npages;
++ unsigned int i;
++ unsigned int order;
++ vm_page_t pages;
++ vm_object_t object;
++ vm_map_entry_t entry;
++ kern_return_t kr;
++ vm_address_t vaddr;
++ vm_offset_t offset = 0;
++
++ if (host_priv == HOST_NULL)
++ return KERN_INVALID_HOST;
++
++ if (map == VM_MAP_NULL)
++ return KERN_INVALID_TASK;
++
++ /*
++ * XXX The page allocator returns blocks with a power-of-two size.
++ * The requested size may not be a power-of-two, causing the pages
++ * at the end of a block to be unused. In order to keep track of
++ * those pages, they must all be inserted in the VM object created
++ * by this function.
++ */
++ order = vm_page_order(size);
++ size = (1 << (order + PAGE_SHIFT));
++
++ /* We allocate the contiguous physical pages for the buffer. */
++
++ npages = size / PAGE_SIZE;
++ pages = vm_page_grab_contig(size, VM_PAGE_SEL_DIRECTMAP);
++ if (pages == NULL)
++ {
++ return KERN_RESOURCE_SHORTAGE;
++ }
++
++#if 0
++ kr = vm_page_grab_contig(npages, pages, NULL, TRUE);
++ if (kr)
++ {
++ kfree (pages, npages * sizeof (vm_page_t));
++ return kr;
++ }
++#endif
++
++ /* Allocate the object
++ * and find the virtual address for the DMA buffer */
++
++ object = vm_object_allocate(size);
++ vm_map_lock(map);
++ /* TODO user_wired_count might need to be set as 1 */
++ kr = vm_map_find_entry(map, &vaddr, size, (vm_offset_t) 0,
++ VM_OBJECT_NULL, &entry);
++ if (kr != KERN_SUCCESS)
++ {
++ vm_map_unlock(map);
++ vm_object_deallocate(object);
++ vm_page_free_contig(pages, size);
++ return kr;
++ }
++
++ entry->object.vm_object = object;
++ entry->offset = 0;
++
++ /* We can unlock map now. */
++ vm_map_unlock(map);
++
++ /* We have physical pages we need and now we need to do the mapping. */
++
++ pmap_pageable (map->pmap, vaddr, vaddr + size, FALSE);
++
++ *result_vaddr = vaddr;
++ *result_paddr = pages->phys_addr;
++
++ for (i = 0; i < npages; i++)
++ {
++ vm_object_lock(object);
++ vm_page_lock_queues();
++ vm_page_insert(&pages[i], object, offset);
++ vm_page_wire(&pages[i]);
++ vm_page_unlock_queues();
++ vm_object_unlock(object);
++
++ /* Enter it in the kernel pmap */
++ PMAP_ENTER(map->pmap, vaddr, &pages[i], VM_PROT_DEFAULT, TRUE);
++
++ vm_object_lock(object);
++ PAGE_WAKEUP_DONE(&pages[i]);
++ vm_object_unlock(object);
++
++ vaddr += PAGE_SIZE;
++ offset += PAGE_SIZE;
++ }
++
++ return KERN_SUCCESS;
++}
+--
+2.1.4
+
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