target-xtensa: add overridable test_init macro

Some test suites, like MMU, need per-test initialization. Don't make them
redefine test macro, add test_init for that purpose.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

tests/tcg/xtensa/macros.inc

diff --git a/tests/tcg/xtensa/macros.inc b/tests/tcg/xtensa/macros.inc
index c9be1ce..ead8528 100644
--- a/tests/tcg/xtensa/macros.inc
+++ b/tests/tcg/xtensa/macros.inc
@@ -43,8 +43,12 @@
     simcall
 .endm
 
+.macro test_init
+.endm
+
 .macro test name
     //print test_\name
+    test_init
 test_\name:
 .global test_\name
 .endm

tests/tcg/xtensa/test_mmu.S

diff --git a/tests/tcg/xtensa/test_mmu.S b/tests/tcg/xtensa/test_mmu.S
index 5d87fbb..4bc34e5 100644
--- a/tests/tcg/xtensa/test_mmu.S
+++ b/tests/tcg/xtensa/test_mmu.S
@@ -2,9 +2,9 @@
 
 test_suite mmu
 
-.purgem test
+.purgem test_init
 
-.macro test name
+.macro test_init
     movi    a2, 0x00000004
     idtlb   a2
     movi    a2, 0x00100004