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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH V4] xen: arm: introduce Cortex-A7 support
Introduce Cortex-A7 with a scalable proc_info_list which including cpu id
and cpu initialize function.
In head.S, search cpu specific MIDR in procinfo and call such initialize
function. Currently, support Cortex-A7 and Cortex-A15.
Signed-off-by: Bamvor Jian Zhang <bjzhang@xxxxxxxx>
---
changes since v3:
1), fix bug in get processor proc info.
2), print unmask cpu value if find proc info fail.
changes since v2:
1), define cpu_init function instead of assemble jump code in struct
proc_info_list
2), add commit in look up proc info in assemble code.
3), merge __v7_ca7mp and __v7_ca15mp and relative definition into prov-v7.S
4), move MIDR mask definition from headers to prov-v7.S
5), move procinfo.h from xen/include/asm-arm/arm32 to xen/include/asm-arm
xen/arch/arm/arm32/Makefile | 2 +-
xen/arch/arm/arm32/asm-offsets.c | 7 +++++
xen/arch/arm/arm32/head.S | 37 +++++++++++++++++++------
xen/arch/arm/arm32/proc-ca15.S | 35 -----------------------
xen/arch/arm/arm32/proc-v7.S | 52 +++++++++++++++++++++++++++++++++++
xen/arch/arm/xen.lds.S | 5 ++++
xen/include/asm-arm/arm32/processor.h | 2 ++
xen/include/asm-arm/processor-ca15.h | 3 --
xen/include/asm-arm/processor-ca7.h | 20 ++++++++++++++
xen/include/asm-arm/processor.h | 3 --
xen/include/asm-arm/procinfo.h | 30 ++++++++++++++++++++
11 files changed, 145 insertions(+), 51 deletions(-)
delete mode 100644 xen/arch/arm/arm32/proc-ca15.S
create mode 100644 xen/arch/arm/arm32/proc-v7.S
create mode 100644 xen/include/asm-arm/processor-ca7.h
create mode 100644 xen/include/asm-arm/procinfo.h
diff --git a/xen/arch/arm/arm32/Makefile b/xen/arch/arm/arm32/Makefile
index b903803..18522dc 100644
--- a/xen/arch/arm/arm32/Makefile
+++ b/xen/arch/arm/arm32/Makefile
@@ -2,7 +2,7 @@ subdir-y += lib
obj-y += entry.o
obj-y += mode_switch.o
-obj-y += proc-ca15.o
+obj-y += proc-v7.o
obj-y += traps.o
obj-y += domain.o
diff --git a/xen/arch/arm/arm32/asm-offsets.c b/xen/arch/arm/arm32/asm-offsets.c
index 776c974..263fff3 100644
--- a/xen/arch/arm/arm32/asm-offsets.c
+++ b/xen/arch/arm/arm32/asm-offsets.c
@@ -11,6 +11,7 @@
#include <xen/bitops.h>
#include <public/xen.h>
#include <asm/current.h>
+#include <asm/procinfo.h>
#define DEFINE(_sym, _val) \
__asm__ __volatile__ ( "\n->" #_sym " %0 " #_val : : "i" (_val) )
@@ -62,6 +63,12 @@ void __dummy__(void)
DEFINE(CPUINFO_sizeof, sizeof(struct cpu_info));
OFFSET(VCPU_arch_saved_context, struct vcpu, arch.saved_context);
+
+ BLANK();
+ DEFINE(PROCINFO_sizeof, sizeof(struct proc_info_list));
+ OFFSET(PROCINFO_cpu_val, struct proc_info_list, cpu_val);
+ OFFSET(PROCINFO_cpu_mask, struct proc_info_list, cpu_mask);
+ OFFSET(PROCINFO_cpu_init, struct proc_info_list, cpu_init);
}
/*
diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S
index 0588d54..b8334e2 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
@@ -185,18 +186,36 @@ hyp:
blo 1b
skip_bss:
-
PRINT("- Setting up control registers -\r\n")
- /* Read CPU ID */
- mrc CP32(r0, MIDR)
- ldr r1, =(MIDR_MASK)
- and r0, r0, r1
- /* Is this a Cortex A15? */
- ldr r1, =(CORTEX_A15_ID)
- teq r0, r1
- bleq cortex_a15_init
+ /* Get processor specific proc info into r1 */
+ mrc CP32(r0, MIDR) /* r0 := our cpu id */
+ ldr r1, = __proc_info_start
+ add r1, r1, r10 /* r1 := paddr of table (start) */
+ ldr r2, = __proc_info_end
+ add r2, r2, r10 /* r2 := paddr of table (end) */
+1: ldr r3, [r1, #PROCINFO_cpu_mask]
+ and r4, r0, r3 /* r4 := our cpu id with mask */
+ ldr r3, [r1, #PROCINFO_cpu_val] /* r3 := cpu val in current proc
info */
+ teq r4, r3
+ beq 2f /* Match => exit, or try next proc
info */
+ add r1, r1, #PROCINFO_sizeof
+ cmp r1, r2
+ blo 1b
+ mov r4, r0
+ PRINT("- Missing processor info: ")
+ mov r0, r4
+ bl putn
+ PRINT(" -\r\n")
+ b fail
+
+2:
+ /* Jump to cpu_init */
+ ldr r1, [r1, #PROCINFO_cpu_init] /* r1 := vaddr(init func) */
+ adr lr, cpu_init_done /* Save return address */
+ add pc, r1, r10 /* Call paddr(init func) */
+cpu_init_done:
/* Set up memory attribute type tables */
ldr r0, =MAIR0VAL
ldr r1, =MAIR1VAL
diff --git a/xen/arch/arm/arm32/proc-ca15.S b/xen/arch/arm/arm32/proc-ca15.S
deleted file mode 100644
index dcdd42e..0000000
--- a/xen/arch/arm/arm32/proc-ca15.S
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * xen/arch/arm/proc-ca15.S
- *
- * Cortex A15 specific initializations
- *
- * Copyright (c) 2011 Citrix Systems.
- *
- * 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-ca15.h>
-
-.globl cortex_a15_init
-cortex_a15_init:
- /* Set up the SMP bit in ACTLR */
- mrc CP32(r0, ACTLR)
- orr r0, r0, #(ACTLR_CA15_SMP) /* enable SMP bit */
- mcr CP32(r0, ACTLR)
- mov pc, lr
-
-/*
- * Local variables:
- * mode: ASM
- * indent-tabs-mode: nil
- * End:
- */
diff --git a/xen/arch/arm/arm32/proc-v7.S b/xen/arch/arm/arm32/proc-v7.S
new file mode 100644
index 0000000..0ab3845
--- /dev/null
+++ b/xen/arch/arm/arm32/proc-v7.S
@@ -0,0 +1,52 @@
+/*
+ * xen/arch/arm/proc-v7.S
+ *
+ * rename from xen/arch/arm/proc-ca15.S
+ * arm v7 specific initializations
+ *
+ * Copyright (c) 2011 Citrix Systems.
+ *
+ * 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/arm32/processor.h>
+
+.globl v7_init
+v7_init:
+ /* Set up the SMP bit in ACTLR */
+ mrc CP32(r0, ACTLR)
+ orr r0, r0, #(ACTLR_V7_SMP) /* enable SMP bit */
+ mcr CP32(r0, ACTLR)
+ mov pc, lr
+
+ .section ".init.proc.info", #alloc, #execinstr
+ .type __v7_ca15mp_proc_info, #object
+__v7_ca15mp_proc_info:
+ .long 0x410FC0F0 /* Cortex-A15 */
+ .long 0xFF0FFFF0 /* Mask */
+ .long v7_init
+ .size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
+
+ .section ".init.proc.info", #alloc, #execinstr
+ .type __v7_ca7mp_proc_info, #object
+__v7_ca7mp_proc_info:
+ .long 0x410FC070 /* Cortex-A7 */
+ .long 0xFF0FFFF0 /* Mask */
+ .long v7_init
+ .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
+
+/*
+ * Local variables:
+ * mode: ASM
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S
index 3b60668..e8b4f47 100644
--- a/xen/arch/arm/xen.lds.S
+++ b/xen/arch/arm/xen.lds.S
@@ -116,6 +116,11 @@ SECTIONS
*(.init.setup)
__setup_end = .;
} :text
+ .init.proc.info : {
+ __proc_info_start = .;
+ *(.init.proc.info)
+ __proc_info_end = .;
+ } :text
.initcall.init : {
__initcall_start = .;
*(.initcallpresmp.init)
diff --git a/xen/include/asm-arm/arm32/processor.h
b/xen/include/asm-arm/arm32/processor.h
index d26fc85..b266252 100644
--- a/xen/include/asm-arm/arm32/processor.h
+++ b/xen/include/asm-arm/arm32/processor.h
@@ -1,6 +1,8 @@
#ifndef __ASM_ARM_ARM32_PROCESSOR_H
#define __ASM_ARM_ARM32_PROCESSOR_H
+#define ACTLR_V7_SMP (1<<6)
+
#ifndef __ASSEMBLY__
/* On stack VCPU state */
struct cpu_user_regs
diff --git a/xen/include/asm-arm/processor-ca15.h
b/xen/include/asm-arm/processor-ca15.h
index 06cdbdd..f65f40a 100644
--- a/xen/include/asm-arm/processor-ca15.h
+++ b/xen/include/asm-arm/processor-ca15.h
@@ -1,9 +1,6 @@
#ifndef __ASM_ARM_PROCESSOR_CA15_H
#define __ASM_ARM_PROCESSOR_CA15_H
-
-#define CORTEX_A15_ID (0x410FC0F0)
-
/* ACTLR Auxiliary Control Register, Cortex A15 */
#define ACTLR_CA15_SNOOP_DELAYED (1<<31)
#define ACTLR_CA15_MAIN_CLOCK (1<<30)
diff --git a/xen/include/asm-arm/processor-ca7.h
b/xen/include/asm-arm/processor-ca7.h
new file mode 100644
index 0000000..5048a95
--- /dev/null
+++ b/xen/include/asm-arm/processor-ca7.h
@@ -0,0 +1,20 @@
+#ifndef __ASM_ARM_PROCESSOR_CA7_H
+#define __ASM_ARM_PROCESSOR_CA7_H
+
+/* ACTLR Auxiliary Control Register, Cortex A7 */
+#define ACTLR_CA7_DDI (1<<28)
+#define ACTLR_CA7_DDVM (1<<15)
+#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:
+ */
diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h
index 1c9d793..263bd03 100644
--- a/xen/include/asm-arm/processor.h
+++ b/xen/include/asm-arm/processor.h
@@ -3,9 +3,6 @@
#include <asm/cpregs.h>
-/* MIDR Main ID Register */
-#define MIDR_MASK 0xff0ffff0
-
/* TTBCR Translation Table Base Control Register */
#define TTBCR_EAE 0x80000000
#define TTBCR_N_MASK 0x07
diff --git a/xen/include/asm-arm/procinfo.h b/xen/include/asm-arm/procinfo.h
new file mode 100644
index 0000000..9d3feb7
--- /dev/null
+++ b/xen/include/asm-arm/procinfo.h
@@ -0,0 +1,30 @@
+/*
+ * include/asm-arm/procinfo.h
+ *
+ * Bamvor Jian Zhang <bjzhang@xxxxxxxx>
+ * Copyright (c) 2013 SUSE
+ *
+ * base on linux/arch/arm/include/asm/procinfo.h
+ * Copyright (C) 1996-1999 Russell King
+ *
+ * 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.
+ */
+
+#ifndef __ASM_ARM_PROCINFO_H
+#define __ASM_ARM_PROCINFO_H
+
+struct proc_info_list {
+ unsigned int cpu_val;
+ unsigned int cpu_mask;
+ void (*cpu_init)(void);
+};
+
+#endif
--
1.8.1.4
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