On ARM systems gd is stored in register r9 or x18. When compiling with clang gd is defined as a macro calling function gd_ptr(). So we can not make assignments to gd.
In the UEFI sub-system we need to save gd when leaving to UEFI binaries and have to restore gd when reentering U-Boot.
Define a new function set_gd() for setting gd and use it in the UEFI sub-system.
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de Tested-by: Tom Rini trini@konsulko.com --- Resent. --- arch/arm/include/asm/global_data.h | 9 +++++++++ lib/efi_loader/efi_boottime.c | 10 +++++----- 2 files changed, 14 insertions(+), 5 deletions(-)
diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h index f23b6bfb75..7c0905d240 100644 --- a/arch/arm/include/asm/global_data.h +++ b/arch/arm/include/asm/global_data.h @@ -117,4 +117,13 @@ static inline gd_t *get_gd(void) #endif #endif
+static inline void set_gd(volatile gd_t *gd_ptr) +{ +#ifdef CONFIG_ARM64 + __asm__ volatile("ldr x18, %0\n" : : "m"(gd_ptr)); +#else + __asm__ volatile("ldr r9, %0\n" : : "m"(gd_ptr)); +#endif +} + #endif /* __ASM_GBL_DATA_H */ diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index db34938196..1591ad8300 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -49,7 +49,7 @@ static efi_handle_t current_image; * restriction so we need to manually swap its and our view of that register on * EFI callback entry/exit. */ -static volatile void *efi_gd, *app_gd; +static volatile gd_t *efi_gd, *app_gd; #endif
/* 1 if inside U-Boot code, 0 if inside EFI payload code */ @@ -89,7 +89,7 @@ int __efi_entry_check(void) #ifdef CONFIG_ARM assert(efi_gd); app_gd = gd; - gd = efi_gd; + set_gd(efi_gd); #endif return ret; } @@ -99,7 +99,7 @@ int __efi_exit_check(void) { int ret = --entry_count == 0; #ifdef CONFIG_ARM - gd = app_gd; + set_gd(app_gd); #endif return ret; } @@ -123,7 +123,7 @@ void efi_restore_gd(void) /* Only restore if we're already in EFI context */ if (!efi_gd) return; - gd = efi_gd; + set_gd(efi_gd); #endif }
@@ -2920,7 +2920,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, * otherwise __efi_entry_check() will put the wrong value into * app_gd. */ - gd = app_gd; + set_gd(app_gd); #endif /* * To get ready to call EFI_EXIT below we have to execute the -- 2.26.2