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arch/x86: Declare GDT symbols and move_gdt()

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We relocate GDT to CBMEM, this can be done late in ramstage.
Note: We currently do this for BSP CPU only.

Change-Id: I626faaf22f846433f25ca2253d6a2a5230f50b6b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7858
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
This commit is contained in:
Kyösti Mälkki
2014-12-18 10:36:33 +02:00
parent a91e1e6cc1
commit bae775a4f4
6 changed files with 42 additions and 21 deletions
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7
src/cpu/x86/lapic/lapic_cpu_init.c
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@@ -21,6 +21,7 @@
*/
#include <cpu/x86/cr.h>
#include <cpu/x86/gdt.h>
#include <cpu/x86/lapic.h>
#include <delay.h>
#include <halt.h>
@@ -53,11 +54,6 @@ char *lowmem_backup_ptr;
int lowmem_backup_size;
#endif
extern char _secondary_start[];
extern char _secondary_gdt_addr[];
extern char gdt[];
extern char gdt_end[];
static inline void setup_secondary_gdt(void)
{
u16 *gdt_limit;
@@ -72,7 +68,6 @@ static inline void setup_secondary_gdt(void)
static void copy_secondary_start_to_lowest_1M(void)
{
extern char _secondary_start_end[];
unsigned long code_size;
/* Fill in secondary_start's local gdt. */

5
src/cpu/x86/mp_init.c
View File

@@ -26,6 +26,7 @@
#include <cpu/cpu.h>
#include <cpu/intel/microcode.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/gdt.h>
#include <cpu/x86/lapic.h>
#include <cpu/x86/name.h>
#include <cpu/x86/msr.h>
@@ -67,10 +68,6 @@ struct saved_msr {
/* The sipi vector rmodule is included in the ramstage using 'objdump -B'. */
extern char _binary_sipi_vector_start[];
/* These symbols are defined in c_start.S. */
extern char gdt[];
extern char gdt_end[];
extern char idtarg[];
/* The SIPI vector is loaded at the SMM_DEFAULT_BASE. The reason is at the
* memory range is already reserved so the OS cannot use it. That region is