From 0deffc80773cc63386846b794b7f1e702212b8f1 Mon Sep 17 00:00:00 2001
From: Nicholas Piggin <npiggin@gmail.com>
Date: Mon, 27 Apr 2020 21:08:04 +1000
Subject: move opal_branch_table, opal_num_args to .rodata section

.head is for code and data which must reside at a fixed low address,
mainly entry points.

These are moved into .rodata. Despite being modified at runtime, this
facilitates these tables being write-protected in a later patch.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
---
 asm/misc.S | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'asm/misc.S')

diff --git a/asm/misc.S b/asm/misc.S
index e2b1989..0334489 100644
--- a/asm/misc.S
+++ b/asm/misc.S
@@ -9,9 +9,19 @@
 #include <asm-offsets.h>
 #include <processor.h>
 #include <stack.h>
+#include <opal-api.h>
 
 #define OLD_BINUTILS 1
 
+	.section ".rodata"
+	/* This is the OPAL branch table. It's populated at boot time
+	 * with function pointers to the various OPAL functions from
+	 * the content of the .opal_table section, indexed by Token.
+	 */
+.global opal_branch_table
+opal_branch_table:
+	.space	8 * (OPAL_LAST + 1)
+
 	.section ".text","ax"
 	.balign	0x10
 
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