MIPS: APRP: Split VPE loader into separate files.

Split the VPE functionality in preparation for adding support
for CMP platforms. Common functions remain in the original file
and a new file contains code specific to platforms that do not
have a CMP present.

Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Reviewed-by: Qais Yousef <Qais.Yousef@imgtec.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6094/

arch/mips/Kconfig

@@ -1907,6 +1907,11 @@ config MIPS_VPE_LOADER
 	  Includes a loader for loading an elf relocatable object
 	  onto another VPE and running it.
 
+config MIPS_VPE_LOADER_MT
+	bool
+	default "y"
+	depends on MIPS_VPE_LOADER && !MIPS_CMP
+
 config MIPS_MT_SMTC_IM_BACKSTOP
 	bool "Use per-TC register bits as backstop for inhibited IM bits"
 	depends on MIPS_MT_SMTC

arch/mips/include/asm/vpe.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2005 MIPS Technologies, Inc.  All rights reserved.
+ * Copyright (C) 2013 Imagination Technologies Ltd.
  *
  *  This program is free software; you can distribute it and/or modify it
  *  under the terms of the GNU General Public License (Version 2) as
@@ -19,6 +20,88 @@
 #ifndef _ASM_VPE_H
 #define _ASM_VPE_H
 
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+
+#define VPE_MODULE_NAME "vpe"
+#define VPE_MODULE_MINOR 1
+
+/* grab the likely amount of memory we will need. */
+#ifdef CONFIG_MIPS_VPE_LOADER_TOM
+#define P_SIZE (2 * 1024 * 1024)
+#else
+/* add an overhead to the max kmalloc size for non-striped symbols/etc */
+#define P_SIZE (256 * 1024)
+#endif
+
+#define MAX_VPES 16
+#define VPE_PATH_MAX 256
+
+static inline int aprp_cpu_index(void)
+{
+#ifdef CONFIG_MIPS_CMP
+	return setup_max_cpus;
+#else
+	extern int tclimit;
+	return tclimit;
+#endif
+}
+
+enum vpe_state {
+	VPE_STATE_UNUSED = 0,
+	VPE_STATE_INUSE,
+	VPE_STATE_RUNNING
+};
+
+enum tc_state {
+	TC_STATE_UNUSED = 0,
+	TC_STATE_INUSE,
+	TC_STATE_RUNNING,
+	TC_STATE_DYNAMIC
+};
+
+struct vpe {
+	enum vpe_state state;
+
+	/* (device) minor associated with this vpe */
+	int minor;
+
+	/* elfloader stuff */
+	void *load_addr;
+	unsigned long len;
+	char *pbuffer;
+	unsigned long plen;
+	unsigned int uid, gid;
+	char cwd[VPE_PATH_MAX];
+
+	unsigned long __start;
+
+	/* tc's associated with this vpe */
+	struct list_head tc;
+
+	/* The list of vpe's */
+	struct list_head list;
+
+	/* shared symbol address */
+	void *shared_ptr;
+
+	/* the list of who wants to know when something major happens */
+	struct list_head notify;
+
+	unsigned int ntcs;
+};
+
+struct tc {
+	enum tc_state state;
+	int index;
+
+	struct vpe *pvpe;	/* parent VPE */
+	struct list_head tc;	/* The list of TC's with this VPE */
+	struct list_head list;	/* The global list of tc's */
+};
+
 struct vpe_notifications {
 	void (*start)(int vpe);
 	void (*stop)(int vpe);
@@ -26,12 +109,36 @@ struct vpe_notifications {
 	struct list_head list;
 };
 
+struct vpe_control {
+	spinlock_t vpe_list_lock;
+	struct list_head vpe_list;      /* Virtual processing elements */
+	spinlock_t tc_list_lock;
+	struct list_head tc_list;       /* Thread contexts */
+};
 
-extern int vpe_notify(int index, struct vpe_notifications *notify);
+extern unsigned long physical_memsize;
+extern struct vpe_control vpecontrol;
+extern const struct file_operations vpe_fops;
 
-extern void *vpe_get_shared(int index);
-extern int vpe_getuid(int index);
-extern int vpe_getgid(int index);
-extern char *vpe_getcwd(int index);
+int vpe_notify(int index, struct vpe_notifications *notify);
 
+void *vpe_get_shared(int index);
+int vpe_getuid(int index);
+int vpe_getgid(int index);
+char *vpe_getcwd(int index);
+
+struct vpe *get_vpe(int minor);
+struct tc *get_tc(int index);
+struct vpe *alloc_vpe(int minor);
+struct tc *alloc_tc(int index);
+void release_vpe(struct vpe *v);
+
+void *alloc_progmem(unsigned long len);
+void release_progmem(void *ptr);
+
+int __weak vpe_run(struct vpe *v);
+void cleanup_tc(struct tc *tc);
+
+int __init vpe_module_init(void);
+void __exit vpe_module_exit(void);
 #endif /* _ASM_VPE_H */

arch/mips/kernel/Makefile

@@ -56,6 +56,7 @@ obj-$(CONFIG_MIPS_CMP)		+= smp-cmp.o
 obj-$(CONFIG_CPU_MIPSR2)	+= spram.o
 
 obj-$(CONFIG_MIPS_VPE_LOADER)	+= vpe.o
+obj-$(CONFIG_MIPS_VPE_LOADER_MT) += vpe-mt.o
 obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o
 
 obj-$(CONFIG_I8259)		+= i8259.o