mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 10:11:27 +01:00
Ian Campbell
443701ef0c
As recommended in http://www.gnu.org/licenses/gpl-howto.en.html. This is the result of: $ git grep -El Mass\|Temple\|Franklin | xargs ./fsf.pl Where fsf.pl is: #!/usr/bin/perl -w -pi.bak -0777 my $repl = 'If not, see <http://www.gnu.org/licenses/>.'; my $br = qr/(?:\s*\n\s*(?:[\*\#]|\/\/|\.\\" )?\s*|\s+)/; my $inwt = qr/[Ii]f${br}not,${br}write${br}(?:to${br})?the${br}Free${br}Software${br}Foundation,(?:${br}Inc\.,)?/; my $mass = qr/675${br}Mass${br}Ave,?${br}Cambridge,?${br}MA${br}02139,?${br}USA,?\.?/; my $franklin = qr/51${br}Franklin${br}St(?:reet)?(?:,${br}| - )Fifth${br}Floor,?${br}Boston,?${br}MA,?${br}02110-1301,?${br}USA,?\.?/; my $temple = qr/59${br}Temple${br}Place(?:,${br}| - )Suite${br}330,?${br}Boston,?${br}MA,?${br}021110?-1307,?${br}USA,?\.?/; s|$inwt$br$mass|$repl|m; s|$inwt$br$franklin|$repl|m; s|$inwt$br$temple|$repl|m; The only remaining mentions of these addresses are in COPYING files which I haven't touched. Some of the changed files are imports from elsewhere, however filtering them out is tricky, I think it is tolerable to have these files be modified here and then perhaps reverted on the next sync, since it's only 1-2 lines and obvious what is going on. Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
/*
|
|
* smp.c: Secondary processor bringup and initialisation.
|
|
*
|
|
* Copyright (c) 2008, Citrix Systems, Inc.
|
|
*
|
|
* Authors:
|
|
* Keir Fraser <keir@xen.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "util.h"
|
|
#include "config.h"
|
|
#include "apic_regs.h"
|
|
|
|
#define AP_BOOT_EIP 0x1000
|
|
extern char ap_boot_start[], ap_boot_end[];
|
|
|
|
static int ap_callin, ap_cpuid;
|
|
|
|
asm (
|
|
" .text \n"
|
|
" .code16 \n"
|
|
"ap_boot_start: .code16 \n"
|
|
" mov %cs,%ax \n"
|
|
" mov %ax,%ds \n"
|
|
" lgdt gdt_desr-ap_boot_start\n"
|
|
" xor %ax, %ax \n"
|
|
" inc %ax \n"
|
|
" lmsw %ax \n"
|
|
" ljmpl $0x08,$1f \n"
|
|
"gdt_desr: \n"
|
|
" .word gdt_end - gdt - 1 \n"
|
|
" .long gdt \n"
|
|
"ap_boot_end: .code32 \n"
|
|
"1: mov $0x10,%eax \n"
|
|
" mov %eax,%ds \n"
|
|
" mov %eax,%es \n"
|
|
" mov %eax,%ss \n"
|
|
" movl $stack_top,%esp \n"
|
|
" movl %esp,%ebp \n"
|
|
" call ap_start \n"
|
|
"1: hlt \n"
|
|
" jmp 1b \n"
|
|
" \n"
|
|
" .align 8 \n"
|
|
"gdt: \n"
|
|
" .quad 0x0000000000000000 \n"
|
|
" .quad 0x00cf9a000000ffff \n" /* 0x08: Flat code segment */
|
|
" .quad 0x00cf92000000ffff \n" /* 0x10: Flat data segment */
|
|
"gdt_end: \n"
|
|
" \n"
|
|
" .bss \n"
|
|
" .align 8 \n"
|
|
"stack: \n"
|
|
" .skip 0x4000 \n"
|
|
"stack_top: \n"
|
|
" .text \n"
|
|
);
|
|
|
|
void ap_start(void); /* non-static avoids unused-function compiler warning */
|
|
/*static*/ void ap_start(void)
|
|
{
|
|
printf(" - CPU%d ... ", ap_cpuid);
|
|
cacheattr_init();
|
|
printf("done.\n");
|
|
wmb();
|
|
ap_callin = 1;
|
|
}
|
|
|
|
static void lapic_wait_ready(void)
|
|
{
|
|
while ( lapic_read(APIC_ICR) & APIC_ICR_BUSY )
|
|
cpu_relax();
|
|
}
|
|
|
|
static void boot_cpu(unsigned int cpu)
|
|
{
|
|
unsigned int icr2 = SET_APIC_DEST_FIELD(LAPIC_ID(cpu));
|
|
|
|
/* Initialise shared variables. */
|
|
ap_cpuid = cpu;
|
|
ap_callin = 0;
|
|
wmb();
|
|
|
|
/* Wake up the secondary processor: INIT-SIPI-SIPI... */
|
|
lapic_wait_ready();
|
|
lapic_write(APIC_ICR2, icr2);
|
|
lapic_write(APIC_ICR, APIC_DM_INIT);
|
|
lapic_wait_ready();
|
|
lapic_write(APIC_ICR2, icr2);
|
|
lapic_write(APIC_ICR, APIC_DM_STARTUP | (AP_BOOT_EIP >> 12));
|
|
lapic_wait_ready();
|
|
lapic_write(APIC_ICR2, icr2);
|
|
lapic_write(APIC_ICR, APIC_DM_STARTUP | (AP_BOOT_EIP >> 12));
|
|
lapic_wait_ready();
|
|
|
|
/*
|
|
* Wait for the secondary processor to complete initialisation.
|
|
* Do not touch shared resources meanwhile.
|
|
*/
|
|
while ( !ap_callin )
|
|
cpu_relax();
|
|
|
|
/* Take the secondary processor offline. */
|
|
lapic_write(APIC_ICR2, icr2);
|
|
lapic_write(APIC_ICR, APIC_DM_INIT);
|
|
lapic_wait_ready();
|
|
}
|
|
|
|
void smp_initialise(void)
|
|
{
|
|
unsigned int i, nr_cpus = hvm_info->nr_vcpus;
|
|
|
|
memcpy((void *)AP_BOOT_EIP, ap_boot_start, ap_boot_end - ap_boot_start);
|
|
|
|
printf("Multiprocessor initialisation:\n");
|
|
ap_start();
|
|
for ( i = 1; i < nr_cpus; i++ )
|
|
boot_cpu(i);
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* mode: C
|
|
* c-file-style: "BSD"
|
|
* c-basic-offset: 4
|
|
* tab-width: 4
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*/
|