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x86: Move coreboot-table detection to common 32/64-bit code

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At present this function is only available in 32-bit code. Move it to the
common cpu file so it can be used by 64-bit U-Boot too.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-04-30 21:21:39 -06:00 committed by Bin Meng
parent c693f212c5
commit 7ec0e7b635
2 changed files with 26 additions and 25 deletions
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25
arch/x86/cpu/cpu.c
View File

@ -290,3 +290,28 @@ int reserve_arch(void)
return 0;
}
#endif
long detect_coreboot_table_at(ulong start, ulong size)
{
u32 *ptr, *end;
size /= 4;
for (ptr = (void *)start, end = ptr + size; ptr < end; ptr += 4) {
if (*ptr == 0x4f49424c) /* "LBIO" */
return (long)ptr;
}
return -ENOENT;
}
long locate_coreboot_table(void)
{
long addr;
/* We look for LBIO in the first 4K of RAM and again at 960KB */
addr = detect_coreboot_table_at(0x0, 0x1000);
if (addr < 0)
addr = detect_coreboot_table_at(0xf0000, 0x1000);
return addr;
}

26
arch/x86/cpu/i386/cpu.c
View File

@ -24,6 +24,7 @@
#include <malloc.h>
#include <spl.h>
#include <asm/control_regs.h>
#include <asm/coreboot_tables.h>
#include <asm/cpu.h>
#include <asm/mp.h>
#include <asm/msr.h>
@ -447,31 +448,6 @@ int x86_cpu_init_f(void)
return 0;
}
long detect_coreboot_table_at(ulong start, ulong size)
{
u32 *ptr, *end;
size /= 4;
for (ptr = (void *)start, end = ptr + size; ptr < end; ptr += 4) {
if (*ptr == 0x4f49424c) /* "LBIO" */
return (long)ptr;
}
return -ENOENT;
}
long locate_coreboot_table(void)
{
long addr;
/* We look for LBIO in the first 4K of RAM and again at 960KB */
addr = detect_coreboot_table_at(0x0, 0x1000);
if (addr < 0)
addr = detect_coreboot_table_at(0xf0000, 0x1000);
return addr;
}
int x86_cpu_reinit_f(void)
{
setup_identity();