From 65e4c0b168651285adeab66f32f3a14668f3e4bd Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 25 Sep 2016 15:27:35 -0600 Subject: x86: efi: Add EFI loader support for x86 Add the required pieces to support the EFI loader on x86. Since U-Boot only builds for 32-bit on x86, only a 32-bit EFI application is supported. If a 64-bit kernel must be booted, U-Boot supports this directly using FIT (see doc/uImage.FIT/kernel.its). U-Boot can act as a payload for both 32-bit and 64-bit EFI. Signed-off-by: Simon Glass Reviewed-by: Bin Meng Signed-off-by: Alexander Graf --- lib/efi_loader/efi_boottime.c | 9 +++++++++ lib/efi_loader/efi_runtime.c | 4 ++++ 2 files changed, 13 insertions(+) (limited to 'lib') diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index ac26375..476ef1b 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -39,6 +39,7 @@ static bool efi_is_direct_boot = true; */ static struct efi_configuration_table EFI_RUNTIME_DATA efi_conf_table[2]; +#ifdef CONFIG_ARM /* * The "gd" pointer lives in a register on ARM and AArch64 that we declare * fixed when compiling U-Boot. However, the payload does not know about that @@ -46,16 +47,20 @@ static struct efi_configuration_table EFI_RUNTIME_DATA efi_conf_table[2]; * EFI callback entry/exit. */ static volatile void *efi_gd, *app_gd; +#endif /* Called from do_bootefi_exec() */ void efi_save_gd(void) { +#ifdef CONFIG_ARM efi_gd = gd; +#endif } /* Called on every callback entry */ void efi_restore_gd(void) { +#ifdef CONFIG_ARM /* Only restore if we're already in EFI context */ if (!efi_gd) return; @@ -63,12 +68,16 @@ void efi_restore_gd(void) if (gd != efi_gd) app_gd = gd; gd = efi_gd; +#endif } /* Called on every callback exit */ efi_status_t efi_exit_func(efi_status_t ret) { +#ifdef CONFIG_ARM gd = app_gd; +#endif + return ret; } diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c index f73e6d9..f007ca6 100644 --- a/lib/efi_loader/efi_runtime.c +++ b/lib/efi_loader/efi_runtime.c @@ -44,6 +44,10 @@ static efi_status_t EFI_RUNTIME_TEXT EFIAPI efi_invalid_parameter(void); #elif defined(CONFIG_ARM) #define R_RELATIVE 23 #define R_MASK 0xffULL +#elif defined(CONFIG_X86) +#include +#define R_RELATIVE R_386_RELATIVE +#define R_MASK 0xffULL #else #error Need to add relocation awareness #endif -- cgit v1.1