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x86: Add a CPU init function for TPL 

For TPL we only need to set up the features and identify the CPU to a
basic level. Add a function to handle that.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2019-10-20 21:37:54 -06:00 committed by Bin Meng
parent 0ced70a0bb
commit ece3a46070
2 changed files with 17 additions and 0 deletions
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8
arch/x86/cpu/i386/cpu.c
View File

@ -385,6 +385,14 @@ static void setup_mtrr(void)
} }
} }
int x86_cpu_init_tpl(void)
{
setup_cpu_features();
setup_identity();
return 0;
}
int x86_cpu_init_f(void) int x86_cpu_init_f(void)
{ {
if (ll_boot_init()) if (ll_boot_init())

9
arch/x86/include/asm/u-boot-x86.h
View File

@ -34,6 +34,15 @@ int x86_cpu_init_f(void);
*/ */
int x86_cpu_reinit_f(void); int x86_cpu_reinit_f(void);
/**
* x86_cpu_init_tpl() - Do the minimum possible CPU init
*
* This just sets up the CPU features and figured out the identity
*
* @return 0 (indicating success, to mimic cpu_init_f())
*/
int x86_cpu_init_tpl(void);
int cpu_init_f(void); int cpu_init_f(void);
void setup_gdt(struct global_data *id, u64 *gdt_addr); void setup_gdt(struct global_data *id, u64 *gdt_addr);
/* /*