mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
4282d12cdc
resource .c functions -- sigh -- this will be next. fix types, fix some usage, but we do not yet generate pirqi, mptables, or acpi. This will be next. This code will be called from phase6 in stage 2, and probably attached to a cpu. Or, it will be inline in the stage2.c code, since the need for tables is generic. I'm also going to move the cryptic usage of lgdt from here to stage 2, phase 2, of the cpu code. The device model improvements are making it easier to think about when things happen, we are finding. I'm going to get lunch and go see some of brussels. It's a miserable day but ... Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Acked-by: Ronald G. Minnich <rminnich@gmail.com> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@130 f3766cd6-281f-0410-b1cd-43a5c92072e9
136 lines
4.9 KiB
C
136 lines
4.9 KiB
C
/*
|
|
* table management code for Linux BIOS
|
|
*
|
|
*
|
|
* Copright (C) 2002 Eric Biederman, Linux NetworX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that 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, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
/* 2006.1 yhlu add mptable cross 0x467 processing */
|
|
|
|
#include <console/console.h>
|
|
#include <string.h>
|
|
//#include <cpu/cpu.h>
|
|
//#include <boot/tables.h>
|
|
//#include <boot/linuxbios_tables.h>
|
|
//#include <arch/pirq_routing.h>
|
|
//#include <arch/smp/mpspec.h>
|
|
//#include <arch/acpi.h>
|
|
#include <tables.h>
|
|
|
|
// Global Descriptor Table, defined in c_start.S
|
|
extern u8 gdt;
|
|
extern u8 gdt_end;
|
|
|
|
/* i386 lgdt argument */
|
|
struct gdtarg {
|
|
unsigned short limit;
|
|
unsigned int base;
|
|
} __attribute__((packed));
|
|
|
|
// Copy GDT to new location and reload it
|
|
// 2003-07 by SONE Takeshi
|
|
// Ported from Etherboot to LinuxBIOS 2005-08 by Steve Magnani
|
|
void move_gdt(unsigned long newgdt)
|
|
{
|
|
u16 num_gdt_bytes = &gdt_end - &gdt;
|
|
struct gdtarg gdtarg;
|
|
|
|
printk(BIOS_DEBUG,"Moving GDT to %#lx...", newgdt);
|
|
memcpy((void*)newgdt, &gdt, num_gdt_bytes);
|
|
gdtarg.base = newgdt;
|
|
gdtarg.limit = num_gdt_bytes - 1;
|
|
__asm__ __volatile__ ("lgdt %0\n\t" : : "m" (gdtarg));
|
|
printk(BIOS_DEBUG,"ok\n");
|
|
}
|
|
|
|
struct lb_memory *write_tables(void)
|
|
{
|
|
unsigned long low_table_start, low_table_end, new_low_table_end;
|
|
unsigned long rom_table_start, rom_table_end;
|
|
|
|
rom_table_start = 0xf0000;
|
|
rom_table_end = 0xf0000;
|
|
/* Start low addr at 16 bytes instead of 0 because of a buglet
|
|
* in the generic linux unzip code, as it tests for the a20 line.
|
|
*/
|
|
low_table_start = 0;
|
|
low_table_end = 16;
|
|
|
|
post_code(0x9a);
|
|
|
|
/* This table must be betweeen 0xf0000 & 0x100000 */
|
|
// rom_table_end = write_pirq_routing_table(rom_table_end);
|
|
// rom_table_end = (rom_table_end + 1023) & ~1023;
|
|
|
|
/* Write ACPI tables */
|
|
/* write them in the rom area because DSDT can be large (8K on epia-m) which
|
|
* pushes linuxbios table out of first 4K if set up in low table area
|
|
*/
|
|
|
|
// rom_table_end = write_acpi_tables(rom_table_end);
|
|
// rom_table_end = (rom_table_end+1023) & ~1023;
|
|
|
|
/* copy the smp block to address 0 */
|
|
post_code(0x96);
|
|
|
|
/* The smp table must be in 0-1K, 639K-640K, or 960K-1M */
|
|
// new_low_table_end = write_smp_table(low_table_end);
|
|
#if 0
|
|
#if HAVE_MP_TABLE==1
|
|
/* Don't write anything in the traditional x86 BIOS data segment,
|
|
* for example the linux kernel smp need to use 0x467 to pass reset vector
|
|
*/
|
|
if(new_low_table_end>0x467){
|
|
unsigned mptable_size = new_low_table_end - low_table_end - SMP_FLOATING_TABLE_LEN;
|
|
/* We can not put mptable here, we need to copy them to somewhere else*/
|
|
if((rom_table_end+mptable_size)<0x100000) {
|
|
/* We can copy mptable on rom_table, and leave low space for lbtable */
|
|
printk(BIOS_DEBUG,"move mptable to 0x%0x\n", rom_table_end);
|
|
memcpy((unsigned char *)rom_table_end, (unsigned char *)(low_table_end+SMP_FLOATING_TABLE_LEN), mptable_size);
|
|
memset((unsigned char *)low_table_end, '\0', mptable_size + SMP_FLOATING_TABLE_LEN);
|
|
smp_write_floating_table_physaddr(low_table_end, rom_table_end);
|
|
low_table_end += SMP_FLOATING_TABLE_LEN;
|
|
rom_table_end += mptable_size;
|
|
rom_table_end = (rom_table_end+1023) & ~1023;
|
|
} else {
|
|
/* We can need to put mptable low and from 0x500 */
|
|
printk(BIOS_DEBUG,"move mptable to 0x%0x\n", 0x500);
|
|
memcpy((unsigned char *)0x500, (unsigned char *)(low_table_end+SMP_FLOATING_TABLE_LEN), mptable_size);
|
|
memset((unsigned char *)low_table_end, '\0', 0x500-low_table_end);
|
|
smp_write_floating_table_physaddr(low_table_end, 0x500);
|
|
low_table_end = 0x500 + mptable_size;
|
|
}
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
/* Don't write anything in the traditional x86 BIOS data segment */
|
|
if (low_table_end < 0x500) {
|
|
low_table_end = 0x500;
|
|
}
|
|
|
|
// Relocate the GDT to reserved memory, so it won't get clobbered
|
|
move_gdt(low_table_end);
|
|
low_table_end += &gdt_end - &gdt;
|
|
|
|
/* The linuxbios table must be in 0-4K or 960K-1M */
|
|
write_linuxbios_table(
|
|
low_table_start, low_table_end,
|
|
rom_table_start, rom_table_end);
|
|
|
|
return get_lb_mem();
|
|
}
|