/SPARTAN/trunk/arch/ia32/include/bios/bios.h |
---|
0,0 → 1,40 |
/* |
* Copyright (C) 2005 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __BIOS_H__ |
#define __BIOS_H__ |
#include <arch/types.h> |
#define BIOS_EBDA_PTR 0x40e |
extern __address ebda; |
extern void bios_init(void); |
#endif /* __BIOS_H__ */ |
/SPARTAN/trunk/arch/ia32/Makefile.inc |
---|
24,6 → 24,7 |
arch/asm.s \ |
arch/proc/scheduler.c \ |
arch/acpi/acpi.c \ |
arch/bios/bios.c \ |
arch/smp/ap.S \ |
arch/smp/apic.c \ |
arch/smp/mp.c \ |
/SPARTAN/trunk/arch/ia32/src/ia32.c |
---|
67,6 → 67,7 |
write_dr0(config.cpu_active - 1); |
if (config.cpu_active == 1) { |
bios_init(); |
i8042_init(); /* a20 bit */ |
i8259_init(); /* PIC */ |
i8254_init(); /* hard clock */ |
/SPARTAN/trunk/arch/ia32/src/bios/bios.c |
---|
0,0 → 1,38 |
/* |
* Copyright (C) 2005 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#include <arch/bios/bios.h> |
#include <arch/types.h> |
__address ebda = 0; |
void bios_init(void) |
{ |
/* Copy the EBDA out from BIOS Data Area */ |
ebda = *((__u16 *) BIOS_EBDA_PTR) * 0x10; |
} |
/SPARTAN/trunk/arch/ia32/src/smp/mp.c |
---|
46,6 → 46,7 |
#include <cpu.h> |
#include <arch/i8259.h> |
#include <arch/asm.h> |
#include <arch/bios/bios.h> |
#include <arch/acpi/madt.h> |
/* |
132,21 → 133,10 |
/* |
* First place to search the MP Floating Pointer Structure is the Extended |
* BIOS Data Area. We have to read EBDA segment address from the BIOS Data |
* Area. Unfortunatelly, this memory is in page 0, which has intentionally no |
* mapping. |
*/ |
frame = frame_alloc(FRAME_KA); |
map_page_to_frame(frame,0,PAGE_CACHEABLE,0); |
addr = *((__u16 *) (frame + 0x40e)) * 16; |
map_page_to_frame(frame,frame,PAGE_CACHEABLE,0); |
frame_free(frame); |
/* |
* EBDA can be undefined. In that case addr would be 0. |
*/ |
if (addr >= 0x1000) { |
addr = ebda; |
if (addr) { |
cnt = 1024; |
while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
if (mp_fs_check((__u8 *) addr)) |
155,18 → 145,19 |
cnt--; |
} |
} |
/* |
* Second place where the MP Floating Pointer Structure may live is the last |
* kilobyte of base memory. |
*/ |
addr = 639*1024; |
cnt = 1024; |
while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
if (mp_fs_check((__u8 *) addr)) |
goto fs_found; |
addr++; |
cnt--; |
else { |
/* |
* Second place where the MP Floating Pointer Structure may live is the last |
* kilobyte of base memory. |
*/ |
addr = 639*1024; |
cnt = 1024; |
while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
if (mp_fs_check((__u8 *) addr)) |
goto fs_found; |
addr++; |
cnt--; |
} |
} |
/* |