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riscv: define function set_gd()

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Function set_gd() is needed in the UEFI sub-system if the global data
pointer is stored in a register.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2020-09-10 07:47:39 +02:00
parent e5a31376ac
commit 6b9966e1aa
1 changed files with 9 additions and 0 deletions
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9
arch/riscv/include/asm/global_data.h
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@@ -39,4 +39,13 @@ struct arch_global_data {
#define DECLARE_GLOBAL_DATA_PTR register gd_t *gd asm ("gp") #define DECLARE_GLOBAL_DATA_PTR register gd_t *gd asm ("gp")
static inline void set_gd(volatile gd_t *gd_ptr)
{
#ifdef CONFIG_64BIT
asm volatile("ld gp, %0\n" : : "m"(gd_ptr));
#else
asm volatile("lw gp, %0\n" : : "m"(gd_ptr));
#endif
}
#endif /* __ASM_GBL_DATA_H */ #endif /* __ASM_GBL_DATA_H */