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#include <console/console.h>
#include <mem.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 "linuxbios_table.h"
#if CONFIG_SMP && CONFIG_MAX_PHYSICAL_CPUS && (CONFIG_MAX_PHYSICAL_CPUS < CONFIG_MAX_CPUS)
static void remove_logical_cpus(unsigned long *processor_map)
{
/* To turn off hyperthreading just remove the logical
* cpus from the processor map.
*/
int disable_logical_cpus = !CONFIG_LOGICAL_CPUS;
if (get_option(&disable_logical_cpus,"hyper_threading")) {
disable_logical_cpus = !CONFIG_LOGICAL_CPUS;
}
if (disable_logical_cpus) {
/* disable logical cpus */
int cnt;
for(cnt=CONFIG_MAX_PHYSICAL_CPUS;cnt<CONFIG_MAX_CPUS;cnt++)
processor_map[cnt]=0;
printk_debug("logical cpus disabled\n");
}
}
#else
#define remove_logical_cpus(processor_map) do {} while(0)
#endif /* CONFIG_SMP && CONFIG_MAX_PHYSICAL_CPUS */
struct lb_memory *write_tables(struct mem_range *mem, unsigned long *processor_map)
{
unsigned long low_table_start, 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);
check_pirq_routing_table();
/* This table must be betweeen 0xf0000 & 0x100000 */
rom_table_end = copy_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 */
remove_logical_cpus(processor_map);
low_table_end = write_smp_table(low_table_end, processor_map);
/* Don't write anything in the traditional x86 BIOS data segment */
if (low_table_end < 0x500) {
low_table_end = 0x500;
}
/* The linuxbios table must be in 0-4K or 960K-1M */
write_linuxbios_table(processor_map, mem,
low_table_start, low_table_end,
rom_table_start >> 10, rom_table_end >> 10);
return get_lb_mem();
}
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