[Qemu-devel] [RFC v1 20/23] riscv: tcg-target: Add the target init code

[Alistair Francis]

Signed-off-by: Alistair Francis <alistair.fran...@wdc.com>
Signed-off-by: Michael Clark <m...@sifive.com>
---
 tcg/riscv/tcg-target.inc.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/tcg/riscv/tcg-target.inc.c b/tcg/riscv/tcg-target.inc.c
index 4b8f65f367..dfc4e8b44c 100644
--- a/tcg/riscv/tcg-target.inc.c
+++ b/tcg/riscv/tcg-target.inc.c
@@ -1641,6 +1641,39 @@ static void tcg_target_qemu_prologue(TCGContext *s)
     tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_RA, 0);
 }
 
+static void tcg_target_init(TCGContext *s)
+{
+    tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff;
+    if (TCG_TARGET_REG_BITS == 64) {
+        tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffff;
+    }
+
+    tcg_target_call_clobber_regs = -1u;
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S0);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S1);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S2);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S3);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S4);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S5);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S6);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S7);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S8);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S9);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S10);
+    tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S11);
+
+    s->reserved_regs = 0;
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP0);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP1);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_L0);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_L1);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_RA);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_GP);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_TP);
+}
+
 void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr,
                               uintptr_t addr)
 {
-- 
2.19.1