arm64: core support

Relocation code based on a patch by Scott Wood, which is:
Signed-off-by: Scott Wood <scottwood@freescale.com>

Signed-off-by: David Feng <fenghua@phytium.com.cn>

1 files changed, 53 insertions, 0 deletions

diff --git a/arch/arm/include/asm/macro.h b/arch/arm/include/asm/macro.h
index ff13f36ba00..f77e4b880e4 100644
--- a/arch/arm/include/asm/macro.h
+++ b/arch/arm/include/asm/macro.h
@@ -54,5 +54,58 @@
 	bcs	1b
 .endm
 
+#ifdef CONFIG_ARM64
+/*
+ * Register aliases.
+ */
+lr	.req	x30
+
+/*
+ * Branch according to exception level
+ */
+.macro	switch_el, xreg, el3_label, el2_label, el1_label
+	mrs	\xreg, CurrentEL
+	cmp	\xreg, 0xc
+	b.eq	\el3_label
+	cmp	\xreg, 0x8
+	b.eq	\el2_label
+	cmp	\xreg, 0x4
+	b.eq	\el1_label
+.endm
+
+/*
+ * Branch if current processor is a slave,
+ * choose processor with all zero affinity value as the master.
+ */
+.macro	branch_if_slave, xreg, slave_label
+	mrs	\xreg, mpidr_el1
+	tst	\xreg, #0xff		/* Test Affinity 0 */
+	b.ne	\slave_label
+	lsr	\xreg, \xreg, #8
+	tst	\xreg, #0xff		/* Test Affinity 1 */
+	b.ne	\slave_label
+	lsr	\xreg, \xreg, #8
+	tst	\xreg, #0xff		/* Test Affinity 2 */
+	b.ne	\slave_label
+	lsr	\xreg, \xreg, #16
+	tst	\xreg, #0xff		/* Test Affinity 3 */
+	b.ne	\slave_label
+.endm
+
+/*
+ * Branch if current processor is a master,
+ * choose processor with all zero affinity value as the master.
+ */
+.macro	branch_if_master, xreg1, xreg2, master_label
+	mrs	\xreg1, mpidr_el1
+	lsr	\xreg2, \xreg1, #32
+	lsl	\xreg1, \xreg1, #40
+	lsr	\xreg1, \xreg1, #40
+	orr	\xreg1, \xreg1, \xreg2
+	cbz	\xreg1, \master_label
+.endm
+
+#endif /* CONFIG_ARM64 */
+
 #endif /* __ASSEMBLY__ */
 #endif /* __ASM_ARM_MACRO_H__ */