[Xen-devel] [PATCH 1/4] xen/arm: introduce Cortex-A7 support

[Bamvor Jian Zhang <bjzhang@xxxxxxxx>]

There are still some different registers compare with Cortex-A7
and Cortex-A15, such as ACTLR. So, the dedicated Cortex-A7 code
is introduced, including the Cortex-A7 initialization function
in assemble.

Signed-off-by: Bamvor Jian Zhang <bjzhang@xxxxxxxx>
---
 xen/arch/arm/arm32/Makefile         |  1 +
 xen/arch/arm/arm32/head.S           | 11 +++++++++++
 xen/arch/arm/arm32/proc-ca7.S       | 36 ++++++++++++++++++++++++++++++++++++
 xen/include/asm-arm/processor-ca7.h | 25 +++++++++++++++++++++++++
 4 files changed, 73 insertions(+)
 create mode 100644 xen/arch/arm/arm32/proc-ca7.S
 create mode 100644 xen/include/asm-arm/processor-ca7.h

diff --git a/xen/arch/arm/arm32/Makefile b/xen/arch/arm/arm32/Makefile
index aaf277a..09b5256 100644
--- a/xen/arch/arm/arm32/Makefile
+++ b/xen/arch/arm/arm32/Makefile
@@ -3,6 +3,7 @@ subdir-y += lib
 obj-y += entry.o
 obj-y += mode_switch.o
 obj-y += proc-ca15.o
+obj-y += proc-ca7.o
 
 obj-y += traps.o
 obj-y += domain.o
diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S
index 0588d54..d3b849b 100644
--- a/xen/arch/arm/arm32/head.S
+++ b/xen/arch/arm/arm32/head.S
@@ -20,6 +20,7 @@
 #include <asm/config.h>
 #include <asm/page.h>
 #include <asm/processor-ca15.h>
+#include <asm/processor-ca7.h>
 #include <asm/asm_defns.h>
 
 #define ZIMAGE_MAGIC_NUMBER 0x016f2818
@@ -195,8 +196,18 @@ skip_bss:
         /* Is this a Cortex A15? */
         ldr   r1, =(CORTEX_A15_ID)
         teq   r0, r1
+        bne   test_ca7
         bleq  cortex_a15_init
+        PRINT("- cortex-a15 init done -\r\n")
+        b     cpu_init_done
+        /* Is this a Cortex A7? */
+test_ca7:
+        ldr   r1, =(CORTEX_A7_ID)
+        teq   r0, r1
+        bleq  cortex_a7_init
+        PRINT("- cortex-a7 init done -\r\n")
 
+cpu_init_done:
         /* Set up memory attribute type tables */
         ldr   r0, =MAIR0VAL
         ldr   r1, =MAIR1VAL
diff --git a/xen/arch/arm/arm32/proc-ca7.S b/xen/arch/arm/arm32/proc-ca7.S
new file mode 100644
index 0000000..e0c1bc2
--- /dev/null
+++ b/xen/arch/arm/arm32/proc-ca7.S
@@ -0,0 +1,36 @@
+/*
+ * xen/arch/arm/proc-ca7.S
+ *
+ * Cortex A7 specific initializations
+ *
+ * Bamvor Jian Zhang <bjzhang@xxxxxxxx>
+ * Copyright (c) 2013 SUSE
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <asm/asm_defns.h>
+#include <asm/processor-ca7.h>
+
+.globl cortex_a7_init
+cortex_a7_init:
+        /* Set up the SMP bit in ACTLR */
+        mrc   CP32(r0, ACTLR)
+        orr   r0, r0, #(ACTLR_CA7_SMP) /* enable SMP bit */
+        mcr   CP32(r0, ACTLR)
+        mov   pc, lr
+
+/*
+ * Local variables:
+ * mode: ASM
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/asm-arm/processor-ca7.h 
b/xen/include/asm-arm/processor-ca7.h
new file mode 100644
index 0000000..b773c34
--- /dev/null
+++ b/xen/include/asm-arm/processor-ca7.h
@@ -0,0 +1,25 @@
+#ifndef __ASM_ARM_PROCESSOR_CA7_H
+#define __ASM_ARM_PROCESSOR_CA7_H
+
+
+#define CORTEX_A7_ID     (0x410FC070)
+
+/* ACTLR Auxiliary Control Register, Cortex A7 */
+#define ACTLR_CA7_DDI                (1<<28)
+#define ACTLR_CA7_DDVM               (1<<15)
+/* 2 bits */
+#define ACTLR_CA7_L1PCTL             (1<<13)
+#define ACTLR_CA7_L1RADIS            (1<<12)
+#define ACTLR_CA7_L2RADIS            (1<<11)
+#define ACTLR_CA7_DODMBS             (1<<10)
+#define ACTLR_CA7_SMP                (1<<6)
+
+#endif /* __ASM_ARM_PROCESSOR_CA7_H */
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
1.8.1.4


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