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MFen 1.23 -> 1.24

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Obtained from:	The FreeBSD Simplified Chinese Project
This commit is contained in:
Xin LI 2006-06-03 15:11:31 +00:00
parent f85dc878cd
commit e76e00aba4
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=28011
1 changed files with 28 additions and 11 deletions
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39
zh_CN.GB2312/books/arch-handbook/pci/chapter.sgml
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@ -2,7 +2,7 @@
The FreeBSD Documentation Project
The FreeBSD Simplified Chinese Project
Original Revision: 1.23
Original Revision: 1.24
$FreeBSD$
-->
@ -123,7 +123,7 @@ mypci_write(struct cdev *dev, struct uio *uio, int ioflag)
/* Look up our softc. */
sc = dev->si_drv1;
device_printf(sc->my_dev, "Asked to write %d bytes.\n", uio->uio_resid);
return (err);
return (0);
}
/* PCI支持函数 */
@ -154,7 +154,7 @@ mypci_attach(device_t dev)
{
struct mypci_softc *sc;
printf("MyPCI Attach for : deviceID : 0x%x\n",pci_get_vendor(dev));
printf("MyPCI Attach for : deviceID : 0x%x\n", pci_get_devid(dev));
/* Look up our softc and initialize its fields. */
sc = device_get_softc(dev);
@ -168,8 +168,9 @@ mypci_attach(device_t dev)
*/
sc-&gt;my_cdev = make_dev(<literal>&amp;</literal>mypci_cdevsw, device_get_unit(dev),
UID_ROOT, GID_WHEEL, 0600, "mypci%u", device_get_unit(dev));
sc-&gt;my_cdev-&gt;si_drv1 = sc;
printf("Mypci device loaded.\n");
return (ENXIO);
return (0);
}
/* 分离设备。 */
@ -291,7 +292,7 @@ SRCS+= device_if.h bus_if.h pci_if.h
函数中有些类似下面的东西：</para>
<programlisting> sc-&gt;bar0id = PCIR_BAR(0);
sc-&gt;bar0res = bus_alloc_resource(dev, SYS_RES_MEMORY, &amp;(sc-&gt;bar0id),
sc-&gt;bar0res = bus_alloc_resource(dev, SYS_RES_MEMORY, &amp;sc-&gt;bar0id,
0, ~0, 1, RF_ACTIVE);
if (sc-&gt;bar0res == NULL) {
printf("Memory allocation of PCI base register 0 failed!\n");
@ -300,7 +301,7 @@ SRCS+= device_if.h bus_if.h pci_if.h
}
sc-&gt;bar1id = PCIR_BAR(1);
sc-&gt;bar1res = bus_alloc_resource(dev, SYS_RES_MEMORY, &amp;(sc-&gt;bar1id),
sc-&gt;bar1res = bus_alloc_resource(dev, SYS_RES_MEMORY, &amp;sc-&gt;bar1id,
0, ~0, 1, RF_ACTIVE);
if (sc-&gt;bar1res == NULL) {
printf("Memory allocation of PCI base register 1 failed!\n");
@ -320,7 +321,8 @@ SRCS+= device_if.h bus_if.h pci_if.h
特定的寄存器：</para>
<programlisting>uint16_t
board_read(struct ni_softc *sc, uint16_t address) {
board_read(struct ni_softc *sc, uint16_t address)
{
return bus_space_read_2(sc-&gt;bar1_bt, sc-&gt;bar1_bh, address);
}
</programlisting>
@ -328,7 +330,8 @@ board_read(struct ni_softc *sc, uint16_t address) {
<para>类似的，可以用下面的函数写寄存器：</para>
<programlisting>void
board_write(struct ni_softc *sc, uint16_t address, uint16_t value) {
board_write(struct ni_softc *sc, uint16_t address, uint16_t value)
{
bus_space_write_2(sc-&gt;bar1_bt, sc-&gt;bar1_bh, address, value);
}
</programlisting>
@ -336,6 +339,23 @@ board_write(struct ni_softc *sc, uint16_t address, uint16_t value) {
<para>这些函数以8位，16位和32位的版本存在，你应当相应地使用
<function>bus_space_{read|write}_{1|2|4}</function>。</para>
<note>
<para>在 FreeBSD 7.0 和更高版本中， 可以用
<function>bus_*</function> 函数来代替
<function>bus_space_*</function>。
<function>bus_*</function> 函数使用的参数是 <type>struct
resource *</type> 指针， 而不是 bus tag 和句柄。
这样， 您就可以将 <structname>softc</structname>
中的 bus tag 和 bus 句柄这两个成员变量去掉， 并将
<function>board_read()</function> 函数改写为：</para>
<programlisting>uint16_t
board_read(struct ni_softc *sc, uint16_t address)
{
return (bus_read(sc-&gt;bar1res, address));
}
</programlisting>
</note>
</sect2>
<sect2>
<title>中断</title>
@ -367,9 +387,6 @@ board_write(struct ni_softc *sc, uint16_t address, uint16_t value) {
printf("Couldn't set up irq\n");
goto fail4;
}
sc-&gt;irq_bt = rman_get_bustag(sc-&gt;irqres);
sc-&gt;irq_bh = rman_get_bushandle(sc-&gt;irqres);
</programlisting>
<para>在设备的分离例程中必须注意一些问题。你必须停顿设备的中断流，