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[efi] Generalise EFI entropy generation to non-x86 CPUs 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/53/head
Michael Brown 2016-05-04 14:13:44 +01:00
parent 757ab98381
commit 57d0ea7c46
3 changed files with 5 additions and 5 deletions
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1
src/arch/x86/include/bits/errfile.h
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@ -53,7 +53,6 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#define ERRFILE_cpuid_cmd ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00000000 ) #define ERRFILE_cpuid_cmd ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00000000 )
#define ERRFILE_cpuid_settings ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00010000 ) #define ERRFILE_cpuid_settings ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00010000 )
#define ERRFILE_efi_entropy ( ERRFILE_ARCH | ERRFILE_OTHER | 0x00020000 )
/** @} */ /** @} */

1
src/include/ipxe/errfile.h
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@ -351,6 +351,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#define ERRFILE_efi_usb ( ERRFILE_OTHER | 0x004b0000 ) #define ERRFILE_efi_usb ( ERRFILE_OTHER | 0x004b0000 )
#define ERRFILE_efi_fbcon ( ERRFILE_OTHER | 0x004c0000 ) #define ERRFILE_efi_fbcon ( ERRFILE_OTHER | 0x004c0000 )
#define ERRFILE_efi_local ( ERRFILE_OTHER | 0x004d0000 ) #define ERRFILE_efi_local ( ERRFILE_OTHER | 0x004d0000 )
#define ERRFILE_efi_entropy ( ERRFILE_OTHER | 0x004e0000 )
/** @} */ /** @} */

8
src/arch/x86/interface/efi/efi_entropy.c → src/interface/efi/efi_entropy.c
View File

@ -26,6 +26,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <errno.h> #include <errno.h>
#include <ipxe/entropy.h> #include <ipxe/entropy.h>
#include <ipxe/crc32.h> #include <ipxe/crc32.h>
#include <ipxe/profile.h>
#include <ipxe/efi/efi.h> #include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/Rng.h> #include <ipxe/efi/Protocol/Rng.h>
@ -104,13 +105,12 @@ static void efi_entropy_disable ( void ) {
/** /**
* Wait for a timer tick * Wait for a timer tick
* *
* @ret low TSC low-order bits, or negative error * @ret low CPU profiling low-order bits, or negative error
*/ */
static int efi_entropy_tick ( void ) { static int efi_entropy_tick ( void ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices; EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
UINTN index; UINTN index;
uint16_t low; uint16_t low;
uint32_t discard_d;
EFI_STATUS efirc; EFI_STATUS efirc;
int rc; int rc;
@ -129,8 +129,8 @@ static int efi_entropy_tick ( void ) {
return rc; return rc;
} }
/* Get current TSC low-order bits */ /* Get current CPU profiling timestamp low-order bits */
__asm__ __volatile__ ( "rdtsc" : "=a" ( low ), "=d" ( discard_d ) ); low = profile_timestamp();
return low; return low;
} }