1 files changed, 111 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/epapr_hcalls.h b/arch/powerpc/include/asm/epapr_hcalls.h
index 86b0ac79990c..334459ad145b 100644
--- a/arch/powerpc/include/asm/epapr_hcalls.h
+++ b/arch/powerpc/include/asm/epapr_hcalls.h
@@ -460,5 +460,116 @@ static inline unsigned int ev_idle(void)
 
         return r3;
 }
+
+#ifdef CONFIG_EPAPR_PARAVIRT
+static inline unsigned long epapr_hypercall(unsigned long *in,
+                            unsigned long *out,
+                            unsigned long nr)
+{
+        unsigned long register r0 asm("r0");
+        unsigned long register r3 asm("r3") = in[0];
+        unsigned long register r4 asm("r4") = in[1];
+        unsigned long register r5 asm("r5") = in[2];
+        unsigned long register r6 asm("r6") = in[3];
+        unsigned long register r7 asm("r7") = in[4];
+        unsigned long register r8 asm("r8") = in[5];
+        unsigned long register r9 asm("r9") = in[6];
+        unsigned long register r10 asm("r10") = in[7];
+        unsigned long register r11 asm("r11") = nr;
+        unsigned long register r12 asm("r12");
+
+        asm volatile("bl        epapr_hypercall_start"
+                     : "=r"(r0), "=r"(r3), "=r"(r4), "=r"(r5), "=r"(r6),
+                       "=r"(r7), "=r"(r8), "=r"(r9), "=r"(r10), "=r"(r11),
+                       "=r"(r12)
+                     : "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7), "r"(r8),
+                       "r"(r9), "r"(r10), "r"(r11)
+                     : "memory", "cc", "xer", "ctr", "lr");
+
+        out[0] = r4;
+        out[1] = r5;
+        out[2] = r6;
+        out[3] = r7;
+        out[4] = r8;
+        out[5] = r9;
+        out[6] = r10;
+        out[7] = r11;
+
+        return r3;
+}
+#else
+static unsigned long epapr_hypercall(unsigned long *in,
+                                   unsigned long *out,
+                                   unsigned long nr)
+{
+        return EV_UNIMPLEMENTED;
+}
+#endif
+
+static inline long epapr_hypercall0_1(unsigned int nr, unsigned long *r2)
+{
+        unsigned long in[8];
+        unsigned long out[8];
+        unsigned long r;
+
+        r = epapr_hypercall(in, out, nr);
+        *r2 = out[0];
+
+        return r;
+}
+
+static inline long epapr_hypercall0(unsigned int nr)
+{
+        unsigned long in[8];
+        unsigned long out[8];
+
+        return epapr_hypercall(in, out, nr);
+}
+
+static inline long epapr_hypercall1(unsigned int nr, unsigned long p1)
+{
+        unsigned long in[8];
+        unsigned long out[8];
+
+        in[0] = p1;
+        return epapr_hypercall(in, out, nr);
+}
+
+static inline long epapr_hypercall2(unsigned int nr, unsigned long p1,
+                                    unsigned long p2)
+{
+        unsigned long in[8];
+        unsigned long out[8];
+
+        in[0] = p1;
+        in[1] = p2;
+        return epapr_hypercall(in, out, nr);
+}
+
+static inline long epapr_hypercall3(unsigned int nr, unsigned long p1,
+                                    unsigned long p2, unsigned long p3)
+{
+        unsigned long in[8];
+        unsigned long out[8];
+
+        in[0] = p1;
+        in[1] = p2;
+        in[2] = p3;
+        return epapr_hypercall(in, out, nr);
+}
+
+static inline long epapr_hypercall4(unsigned int nr, unsigned long p1,
+                                    unsigned long p2, unsigned long p3,
+                                    unsigned long p4)
+{
+        unsigned long in[8];
+        unsigned long out[8];
+
+        in[0] = p1;
+        in[1] = p2;
+        in[2] = p3;
+        in[3] = p4;
+        return epapr_hypercall(in, out, nr);
+}
 #endif /* !__ASSEMBLY__ */
 #endif /* _EPAPR_HCALLS_H */