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riscv: define function set_gd()

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>
Heinrich Schuchardt 3 anni fa
parent
commit
6b9966e1aa
1 ha cambiato i file con 9 aggiunte e 0 eliminazioni
  1. 9 0
      arch/riscv/include/asm/global_data.h

+ 9 - 0
arch/riscv/include/asm/global_data.h

@@ -39,4 +39,13 @@ struct arch_global_data {
 
 #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 */