答复: CPU refactoring status....

[YhLu]

The hardwaremain become more tidy.

How about the progress about the romcc? I hope I can enable debug info while
include all ati support stuff.

Regards

YH

-----邮件原件-----
发件人: [e-mail] [mailto:[e-mail]] 
发送时间: 2004年7月7日 21:03
收件人: LinuxBIOS
抄送: YhLu; ron minnich; Stefan Reinauer
主题: Re: CPU refactoring status....

[e-mail] (Eric W. Biederman) writes:
> The next big task is to get make the SMP cpu initialization methods
> normal device tree methods.  I have everything ready to do that
> except I need a good way to get the information in the struct
> mem_range array by sizeram().   My gut feel is that I want to
> incorporate the sizeram functionality into the resource allocator,

Moving sizeram into read_resources/set_resources comes out fairly
clean, but it did require some grunt work.

That has allowed me to sort out the device tree and have a fairly
generic method of initializing cpus.  Cpus don't fit into device
model methods as nicely as I would like (largely because their
methods have to run on the cpu in question).  But it does work
well enough I can remove the special case from hardwaremain.
I still have a special case in the root_device methods but
that can be overridden, if necessary.

Because I have restructured where things fall in the device tree.
    Because I have removed the sizeram call.
    Because I have refactored x86 cpu handling.
    Because I have removed the array initial_apic_id.

Every port in the tree is likely to break when I check this code in.

I have the arima/hdama working and I can with a little care 
fix up the k8 based ports.

I can also likely fixup the recent e7501 forward port from the
freebios tree.

However beyond that I don't have testing resources to fix things up
so I am looking for some feedback before I break everything.

When in the next week or so is a good time?

Does any one have concerns about this set of changes?

I have attached my current version of hardwaremain below
to give a feel of what the changes look like.

Ok now I am off to bed.  Before I commit anything I am going to let
the code sit a little.

Good Night,

Eric

/*
 * C Bootstrap code for the LinuxBIOS
 */

#include <console/console.h>
#include <mem.h>
#include <version.h>
#include <boot/tables.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/chip.h>
#include <delay.h>
#include <stdlib.h>
#include <part/hard_reset.h>
#include <boot/elf.h>

void hardwaremain(int boot_complete)
{
    /* the order here is a bit tricky. We don't want to do much of 
     * anything that uses config registers until after
PciAllocateResources
     * since that function also figures out what kind of config strategy
     * to use (type 1 or type 2). 
     * so we turn on cache, then worry about PCI setup, then do other 
     * things, so that the other work can use the PciRead* and PciWrite*
     * functions. 
     */
    struct lb_memory *lb_mem;

post_code(0x80);

CONFIGURE(CONF_PASS_PRE_CONSOLE);

/* displayinit MUST PRECEDE ALL PRINTK! */
    console_init();
    
    post_code(0x39);
    printk_notice("LinuxBIOS-%s%s %s %s...\n", 
    	linuxbios_version, linuxbios_extra_version, linuxbios_build,
    	(boot_complete)?"rebooting":"booting");

post_code(0x40);

/* If we have already booted attempt a hard reboot */
    if (boot_complete) {
    	hard_reset();
    }

init_timer(); /* needs to be moved into static configuration */

CONFIGURE(CONF_PASS_PRE_PCI);

/* pick how to scan the bus. This is first so we can get at memory
size. */
    printk_info("Finding PCI configuration type.\n");
    pci_set_method();
    post_code(0x5f);
    enumerate_static_devices();
    dev_enumerate();
    post_code(0x66);
    /* Now do the real bus.
     * We round the total ram up a lot for thing like the SISFB, which 
     * shares high memory with the CPU. 
     */
    dev_configure();
    post_code(0x88);

dev_enable();

dev_initialize();
    post_code(0x89);

CONFIGURE(CONF_PASS_POST_PCI);

/* Now that we have collected all of our information
     * write our configuration tables.
     */
    lb_mem = write_tables();

CONFIGURE(CONF_PASS_PRE_BOOT);

elfboot(lb_mem);
}