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move mptable to 960k to 1M

Browse Source 
https://openbios.org/roundup/linuxbios/issue55

This patch is a little bit enhanced, it keeps the ppc table consistent,
which Yinghai's original patch did not.



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2342 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer
2006-07-19 15:32:49 +00:00
parent e32243a9b1
commit 4f1cb23426
5 changed files with 88 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
src/arch/i386/boot/tables.c
View File

@@ -1,3 +1,6 @@
/* 2006.1 yhlu add mptable cross 0x467 processing */
#include <console/console.h>
#include <cpu/cpu.h>
#include <boot/tables.h>
@@ -13,8 +16,8 @@ extern uint8_t gdt_end;
/* i386 lgdt argument */
struct gdtarg {
unsigned short limit;
unsigned int base;
unsigned short limit;
unsigned int base;
} __attribute__((packed));
// Copy GDT to new location and reload it
@@ -23,19 +26,19 @@ struct gdtarg {
void move_gdt(unsigned long newgdt)
{
uint16_t num_gdt_bytes = &gdt_end - &gdt;
struct gdtarg gdtarg;
struct gdtarg gdtarg;
printk_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_debug("ok\n");
printk_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_debug("ok\n");
}
struct lb_memory *write_tables(void)
{
unsigned long low_table_start, low_table_end;
unsigned long low_table_start, low_table_end, new_low_table_end;
unsigned long rom_table_start, rom_table_end;
rom_table_start = 0xf0000;
@@ -52,12 +55,6 @@ struct lb_memory *write_tables(void)
rom_table_end = write_pirq_routing_table(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 */
low_table_end = write_smp_table(low_table_end);
/* 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
@@ -66,6 +63,37 @@ struct lb_memory *write_tables(void)
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);
/* 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_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_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;
}
}
/* Don't write anything in the traditional x86 BIOS data segment */
if (low_table_end < 0x500) {
low_table_end = 0x500;
@@ -78,7 +106,7 @@ struct lb_memory *write_tables(void)
/* The linuxbios table must be in 0-4K or 960K-1M */
write_linuxbios_table(
low_table_start, low_table_end,
rom_table_start >> 10, rom_table_end >> 10);
rom_table_start, rom_table_end);
return get_lb_mem();
}