diff options
| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-05-27 01:58:30 +0200 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-06-03 17:19:17 +0200 |
| commit | 4f7dc5f608c07f5bc169217bedac6883b0d998df (patch) | |
| tree | 462d9e5d76b654737c733eef78b23c1e141ea9ad /arch | |
| parent | 0e69bcfb27644f9e7c575aa3565bcff922c7dec2 (diff) | |
efi_loader: allow compiling with clang
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/global_data.h | 9 |
1 files changed, 9 insertions, 0 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 */ |