diff options
| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-09-10 12:22:54 +0200 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-09-14 23:28:52 +0200 |
| commit | d68d7f47a9f1942ee64e0b119f0e1e2ebf660ed1 (patch) | |
| tree | 5ceeafe2ede2b05c3f9d4b1a7c83465a5a0a9ced /lib/efi_loader | |
| parent | 6b9966e1aa362e97e9b33b7b82ff713f2ddea2c1 (diff) | |
efi_loader: save global data pointer on RISC-V
On RISC-V the global data pointer is stored in register gp. When a UEFI
binary calls the EFI API we have to restore it.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'lib/efi_loader')
| -rw-r--r-- | lib/efi_loader/efi_boottime.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index dcd3eec894..bf78176217 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -42,9 +42,9 @@ LIST_HEAD(efi_register_notify_events); /* Handle of the currently executing image */ static efi_handle_t current_image; -#ifdef CONFIG_ARM +#if defined(CONFIG_ARM) || defined(CONFIG_RISCV) /* - * The "gd" pointer lives in a register on ARM and AArch64 that we declare + * The "gd" pointer lives in a register on ARM and RISC-V that we declare * fixed when compiling U-Boot. However, the payload does not know about that * restriction so we need to manually swap its and our view of that register on * EFI callback entry/exit. @@ -86,7 +86,7 @@ static efi_status_t EFIAPI efi_disconnect_controller( int __efi_entry_check(void) { int ret = entry_count++ == 0; -#ifdef CONFIG_ARM +#if defined(CONFIG_ARM) || defined(CONFIG_RISCV) assert(efi_gd); app_gd = gd; set_gd(efi_gd); @@ -98,7 +98,7 @@ int __efi_entry_check(void) int __efi_exit_check(void) { int ret = --entry_count == 0; -#ifdef CONFIG_ARM +#if defined(CONFIG_ARM) || defined(CONFIG_RISCV) set_gd(app_gd); #endif return ret; @@ -107,7 +107,7 @@ int __efi_exit_check(void) /** * efi_save_gd() - save global data register * - * On the ARM architecture gd is mapped to a fixed register (r9 or x18). + * On the ARM and RISC-V architectures gd is mapped to a fixed register. * As this register may be overwritten by an EFI payload we save it here * and restore it on every callback entered. * @@ -115,7 +115,7 @@ int __efi_exit_check(void) */ void efi_save_gd(void) { -#ifdef CONFIG_ARM +#if defined(CONFIG_ARM) || defined(CONFIG_RISCV) efi_gd = gd; #endif } @@ -123,13 +123,13 @@ void efi_save_gd(void) /** * efi_restore_gd() - restore global data register * - * On the ARM architecture gd is mapped to a fixed register (r9 or x18). + * On the ARM and RISC-V architectures gd is mapped to a fixed register. * Restore it after returning from the UEFI world to the value saved via * efi_save_gd(). */ void efi_restore_gd(void) { -#ifdef CONFIG_ARM +#if defined(CONFIG_ARM) || defined(CONFIG_RISCV) /* Only restore if we're already in EFI context */ if (!efi_gd) return; @@ -2920,7 +2920,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, * us to the current line. This implies that the second half * of the EFI_CALL macro has not been executed. */ -#ifdef CONFIG_ARM +#if defined(CONFIG_ARM) || defined(CONFIG_RISCV) /* * efi_exit() called efi_restore_gd(). We have to undo this * otherwise __efi_entry_check() will put the wrong value into |