Improve kernel.ld linker script organization by using MEMORY command.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org>
---
 tests/tcg/aarch64/system/kernel.ld | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/tests/tcg/aarch64/system/kernel.ld b/tests/tcg/aarch64/system/kernel.ld
index 7b3a76dcbf..5f39258d32 100644
--- a/tests/tcg/aarch64/system/kernel.ld
+++ b/tests/tcg/aarch64/system/kernel.ld
@@ -1,23 +1,23 @@
 ENTRY(__start)
 
-SECTIONS
-{
-    /* virt machine, RAM starts at 1gb */
-    . = (1 << 30);
+MEMORY {
+    /* On virt machine RAM starts at 1 GiB. */
+
+    /* Align text and rodata to the 1st 2 MiB chunk. */
+    TXT (rx) : ORIGIN = 1 << 30, LENGTH = 2M
+    /* Align r/w data to the 2nd 2 MiB chunk. */
+    DAT (rw) : ORIGIN = (1 << 30) + 2M, LENGTH = 2M
+}
+
+SECTIONS {
     .text : {
         *(.text)
-    }
-    .rodata : {
         *(.rodata)
-    }
-    /* align r/w section to next 2mb */
-    . = ALIGN(1 << 21);
+    } >TXT
     .data : {
         *(.data)
-    }
-    .bss : {
         *(.bss)
-    }
+    } >DAT
     /DISCARD/ : {
         *(.ARM.attributes)
     }
-- 
2.34.1