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Add EFI utility functions to libefi

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This patch adds additional EFI utility functions to convert errno
values to EFI_STATUS errors, as well as EFI times to UNIX times.

Submitted by: Eric McCorkle
Differential Revision: https://reviews.freebsd.org/D11858
This commit is contained in:
imp 2017-08-04 04:20:11 +00:00
parent 50dc7e2335
commit 5a0a56d9eb
3 changed files with 138 additions and 38 deletions
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1
sys/boot/efi/include/efilib.h
View File

@ -79,6 +79,7 @@ CHAR16 *efi_devpath_name(EFI_DEVICE_PATH *);
void efi_free_devpath_name(CHAR16 *);
int efi_status_to_errno(EFI_STATUS);
EFI_STATUS errno_to_efi_status(int errno);
void efi_time_init(void);
void efi_time_fini(void);

63
sys/boot/efi/libefi/errno.c
View File

@ -30,6 +30,69 @@ __FBSDID("$FreeBSD$");
#include <efi.h>
#include <efilib.h>
EFI_STATUS
errno_to_efi_status(int errno)
{
EFI_STATUS status;
switch (errno) {
case EPERM:
status = EFI_ACCESS_DENIED;
break;
case EOVERFLOW:
status = EFI_BUFFER_TOO_SMALL;
break;
case EIO:
status = EFI_DEVICE_ERROR;
break;
case EINVAL:
status = EFI_INVALID_PARAMETER;
break;
case ESTALE:
status = EFI_MEDIA_CHANGED;
break;
case ENXIO:
status = EFI_NO_MEDIA;
break;
case ENOENT:
status = EFI_NOT_FOUND;
break;
case ENOMEM:
status = EFI_OUT_OF_RESOURCES;
break;
case ENOTSUP:
case ENODEV:
status = EFI_UNSUPPORTED;
break;
case ENOSPC:
status = EFI_VOLUME_FULL;
break;
case EACCES:
status = EFI_WRITE_PROTECTED;
break;
case 0:
status = EFI_SUCCESS;
break;
default:
status = EFI_DEVICE_ERROR;
break;
}
return (status);
}
int
efi_status_to_errno(EFI_STATUS status)
{

112
sys/boot/efi/libefi/time.c
View File

@ -58,6 +58,41 @@ __FBSDID("$FreeBSD$");
#define SECSPERHOUR ( 60*60 )
#define SECSPERDAY (24 * SECSPERHOUR)
/*
// These arrays give the cumulative number of days up to the first of the
// month number used as the index (1 -> 12) for regular and leap years.
// The value at index 13 is for the whole year.
*/
static const time_t CumulativeDays[2][14] = {
{0,
0,
31,
31 + 28,
31 + 28 + 31,
31 + 28 + 31 + 30,
31 + 28 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
{0,
0,
31,
31 + 29,
31 + 29 + 31,
31 + 29 + 31 + 30,
31 + 29 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
void
efi_time_init(void)
{
@ -68,45 +103,46 @@ efi_time_fini(void)
{
}
static time_t
efi_time(EFI_TIME *ETime)
void
to_efi_time(EFI_TIME *efi_time, time_t time)
{
/*
// These arrays give the cumulative number of days up to the first of the
// month number used as the index (1 -> 12) for regular and leap years.
// The value at index 13 is for the whole year.
*/
static time_t CumulativeDays[2][14] = {
{0,
0,
31,
31 + 28,
31 + 28 + 31,
31 + 28 + 31 + 30,
31 + 28 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
{0,
0,
31,
31 + 29,
31 + 29 + 31,
31 + 29 + 31 + 30,
31 + 29 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
if (time >= 0) {
for (efi_time->Year = 1970;
time > CumulativeDays[isleap(efi_time->Year)][13] * SECSPERDAY;
time -= CumulativeDays[isleap(efi_time->Year)][13] * SECSPERDAY,
efi_time->Year++);
time_t UTime;
for (efi_time->Month = 0;
time > CumulativeDays[isleap(efi_time->Year)][efi_time->Month] *
SECSPERDAY;
efi_time->Month++);
time -= CumulativeDays[isleap(efi_time->Year)][efi_time->Month - 1] *
SECSPERDAY;
for (efi_time->Day = 0; time > SECSPERDAY;
time -= SECSPERDAY, efi_time->Day++);
for (efi_time->Hour = 0; time > SECSPERHOUR;
time -= SECSPERHOUR, efi_time->Hour++);
for (efi_time->Minute = 0; time > 60;
time -= 60, efi_time->Minute++);
efi_time->Second = time;
efi_time->Nanosecond = 0;
efi_time->TimeZone = 0;
efi_time->Daylight = 0;
} else {
memset(efi_time, 0, sizeof(EFI_TIME));
}
}
time_t
from_efi_time(EFI_TIME *ETime)
{
time_t UTime;
int Year;
/*
@ -196,7 +232,7 @@ EFI_GetTimeOfDay(
// Convert to UNIX time (ie seconds since the epoch
*/
tp->tv_sec = efi_time( &EfiTime );
tp->tv_sec = from_efi_time( &EfiTime );
tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */
/*