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[efi] Perform meaningful error code conversions

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Exploit the redefinition of iPXE error codes to include a "platform
error code" to allow for meaningful conversion of EFI_STATUS values to
iPXE errors and vice versa.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-04-18 21:29:53 +01:00
parent 7348035231
commit 54409583e2
20 changed files with 212 additions and 200 deletions
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11
src/interface/efi/efi_timer.c
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@@ -19,6 +19,8 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <assert.h>
#include <unistd.h>
@@ -54,10 +56,12 @@ EFI_REQUIRE_PROTOCOL ( EFI_CPU_ARCH_PROTOCOL, &cpu_arch );
static void efi_udelay ( unsigned long usecs ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_STATUS efirc;
int rc;
if ( ( efirc = bs->Stall ( usecs ) ) != 0 ) {
rc = -EEFI ( efirc );
DBG ( "EFI could not delay for %ldus: %s\n",
usecs, efi_strerror ( efirc ) );
usecs, strerror ( rc ) );
/* Probably screwed */
}
}
@@ -70,12 +74,13 @@ static void efi_udelay ( unsigned long usecs ) {
static unsigned long efi_currticks ( void ) {
UINT64 time;
EFI_STATUS efirc;
int rc;
/* Read CPU timer 0 (TSC) */
if ( ( efirc = cpu_arch->GetTimerValue ( cpu_arch, 0, &time,
NULL ) ) != 0 ) {
DBG ( "EFI could not read CPU timer: %s\n",
efi_strerror ( efirc ) );
rc = -EEFI ( efirc );
DBG ( "EFI could not read CPU timer: %s\n", strerror ( rc ) );
/* Probably screwed */
return -1UL;
}