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Support cpuid --pae.

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This commit is contained in:
Vladimir Serbinenko 2013-12-17 23:27:22 +01:00
parent daaa89dbe5
commit ba14476051
3 changed files with 35 additions and 4 deletions
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4
ChangeLog
View file

@ -1,3 +1,7 @@
2013-12-17 Vladimir Serbinenko <phcoder@gmail.com>
Support cpuid --pae.
2013-12-17 Vladimir Serbinenko <phcoder@gmail.com>
Use AT keyboard on Yeeloong 3A.

34
grub-core/commands/i386/cpuid.c
View file

@ -34,19 +34,38 @@ static const struct grub_arg_option options[] =
/* TRANSLATORS: "(default)" at the end means that this option is used if
no argument is specified. */
{"long-mode", 'l', 0, N_("Check if CPU supports 64-bit (long) mode (default)."), 0, 0},
{"pae", 'p', 0, N_("Check if CPU supports Physical Address Extension."), 0, 0},
{0, 0, 0, 0, 0, 0}
};
#define bit_LM (1 << 29)
enum
{
MODE_LM = 0,
MODE_PAE = 1
};
unsigned char grub_cpuid_has_longmode = 0;
enum
{
bit_PAE = (1 << 6),
};
enum
{
bit_LM = (1 << 29)
};
unsigned char grub_cpuid_has_longmode = 0, grub_cpuid_has_pae = 0;
static grub_err_t
grub_cmd_cpuid (grub_extcmd_context_t ctxt __attribute__ ((unused)),
grub_cmd_cpuid (grub_extcmd_context_t ctxt,
int argc __attribute__ ((unused)),
char **args __attribute__ ((unused)))
{
return grub_cpuid_has_longmode ? GRUB_ERR_NONE
int val = 0;
if (ctxt->state[MODE_PAE].set)
val = grub_cpuid_has_pae;
else
val = grub_cpuid_has_longmode;
return val ? GRUB_ERR_NONE
/* TRANSLATORS: it's a standalone boolean value,
opposite of "true". */
: grub_error (GRUB_ERR_TEST_FAILURE, N_("false"));
@ -59,6 +78,7 @@ GRUB_MOD_INIT(cpuid)
#ifdef __x86_64__
/* grub-emu */
grub_cpuid_has_longmode = 1;
grub_cpuid_has_pae = 1;
#else
unsigned int eax, ebx, ecx, edx;
unsigned int max_level;
@ -79,6 +99,12 @@ GRUB_MOD_INIT(cpuid)
if (max_level == 0)
goto done;
if (max_level >= 1)
{
grub_cpuid (1, eax, ebx, ecx, edx);
grub_cpuid_has_pae = !!(edx & bit_PAE);
}
grub_cpuid (0x80000000, eax, ebx, ecx, edx);
ext_level = eax;
if (ext_level < 0x80000000)

1
include/grub/i386/cpuid.h
View file

@ -20,6 +20,7 @@
#define GRUB_CPU_CPUID_HEADER 1
extern unsigned char grub_cpuid_has_longmode;
extern unsigned char grub_cpuid_has_pae;
#ifdef __x86_64__