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authorAnton Arapov <anton@redhat.com>2012-06-08 12:58:00 +0200
committerAnton Arapov <anton@redhat.com>2012-06-08 12:58:00 +0200
commit6792a3f47a2e42d7164292bf7f1a55cfc4c91652 (patch)
treeb90c002bfbbeaec92f5d8a2383dcabf6524016f7 /arch/c6x/include/asm
parentfe2895d3d55146cac65b273c0f83e2c7e543cd0e (diff)
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fedora kernel: b920e9b748c595f970bf80ede7832d39f8d567dav3.4.1-2
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/c6x/include/asm')
-rw-r--r--arch/c6x/include/asm/Kbuild1
-rw-r--r--arch/c6x/include/asm/barrier.h27
-rw-r--r--arch/c6x/include/asm/bitops.h1
-rw-r--r--arch/c6x/include/asm/bug.h23
-rw-r--r--arch/c6x/include/asm/cmpxchg.h68
-rw-r--r--arch/c6x/include/asm/exec.h6
-rw-r--r--arch/c6x/include/asm/irq.h249
-rw-r--r--arch/c6x/include/asm/pgtable.h3
-rw-r--r--arch/c6x/include/asm/processor.h9
-rw-r--r--arch/c6x/include/asm/setup.h1
-rw-r--r--arch/c6x/include/asm/special_insns.h63
-rw-r--r--arch/c6x/include/asm/switch_to.h33
-rw-r--r--arch/c6x/include/asm/system.h168
13 files changed, 231 insertions, 421 deletions
diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
index 13dcf78adf9..3af601e31e6 100644
--- a/arch/c6x/include/asm/Kbuild
+++ b/arch/c6x/include/asm/Kbuild
@@ -3,7 +3,6 @@ include include/asm-generic/Kbuild.asm
generic-y += atomic.h
generic-y += auxvec.h
generic-y += bitsperlong.h
-generic-y += bug.h
generic-y += bugs.h
generic-y += cputime.h
generic-y += current.h
diff --git a/arch/c6x/include/asm/barrier.h b/arch/c6x/include/asm/barrier.h
new file mode 100644
index 00000000000..538240e8590
--- /dev/null
+++ b/arch/c6x/include/asm/barrier.h
@@ -0,0 +1,27 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_BARRIER_H
+#define _ASM_C6X_BARRIER_H
+
+#define nop() asm("NOP\n");
+
+#define mb() barrier()
+#define rmb() barrier()
+#define wmb() barrier()
+#define set_mb(var, value) do { var = value; mb(); } while (0)
+#define set_wmb(var, value) do { var = value; wmb(); } while (0)
+
+#define smp_mb() barrier()
+#define smp_rmb() barrier()
+#define smp_wmb() barrier()
+#define smp_read_barrier_depends() do { } while (0)
+
+#endif /* _ASM_C6X_BARRIER_H */
diff --git a/arch/c6x/include/asm/bitops.h b/arch/c6x/include/asm/bitops.h
index 39ab7e874d9..0bec7e5036a 100644
--- a/arch/c6x/include/asm/bitops.h
+++ b/arch/c6x/include/asm/bitops.h
@@ -15,7 +15,6 @@
#include <linux/bitops.h>
-#include <asm/system.h>
#include <asm/byteorder.h>
/*
diff --git a/arch/c6x/include/asm/bug.h b/arch/c6x/include/asm/bug.h
new file mode 100644
index 00000000000..8d59933dd6f
--- /dev/null
+++ b/arch/c6x/include/asm/bug.h
@@ -0,0 +1,23 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_BUG_H
+#define _ASM_C6X_BUG_H
+
+#include <linux/linkage.h>
+#include <asm-generic/bug.h>
+
+struct pt_regs;
+
+extern void die(char *str, struct pt_regs *fp, int nr);
+extern asmlinkage int process_exception(struct pt_regs *regs);
+extern asmlinkage void enable_exception(void);
+
+#endif /* _ASM_C6X_BUG_H */
diff --git a/arch/c6x/include/asm/cmpxchg.h b/arch/c6x/include/asm/cmpxchg.h
new file mode 100644
index 00000000000..b27c8cefb8c
--- /dev/null
+++ b/arch/c6x/include/asm/cmpxchg.h
@@ -0,0 +1,68 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_CMPXCHG_H
+#define _ASM_C6X_CMPXCHG_H
+
+#include <linux/irqflags.h>
+
+/*
+ * Misc. functions
+ */
+static inline unsigned int __xchg(unsigned int x, volatile void *ptr, int size)
+{
+ unsigned int tmp;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ switch (size) {
+ case 1:
+ tmp = 0;
+ tmp = *((unsigned char *) ptr);
+ *((unsigned char *) ptr) = (unsigned char) x;
+ break;
+ case 2:
+ tmp = 0;
+ tmp = *((unsigned short *) ptr);
+ *((unsigned short *) ptr) = x;
+ break;
+ case 4:
+ tmp = 0;
+ tmp = *((unsigned int *) ptr);
+ *((unsigned int *) ptr) = x;
+ break;
+ }
+ local_irq_restore(flags);
+ return tmp;
+}
+
+#define xchg(ptr, x) \
+ ((__typeof__(*(ptr)))__xchg((unsigned int)(x), (void *) (ptr), \
+ sizeof(*(ptr))))
+#define tas(ptr) xchg((ptr), 1)
+
+
+#include <asm-generic/cmpxchg-local.h>
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n) \
+ ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \
+ (unsigned long)(o), \
+ (unsigned long)(n), \
+ sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+
+#include <asm-generic/cmpxchg.h>
+
+#endif /* _ASM_C6X_CMPXCHG_H */
diff --git a/arch/c6x/include/asm/exec.h b/arch/c6x/include/asm/exec.h
new file mode 100644
index 00000000000..0fea482cdc8
--- /dev/null
+++ b/arch/c6x/include/asm/exec.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_C6X_EXEC_H
+#define _ASM_C6X_EXEC_H
+
+#define arch_align_stack(x) (x)
+
+#endif /* _ASM_C6X_EXEC_H */
diff --git a/arch/c6x/include/asm/irq.h b/arch/c6x/include/asm/irq.h
index a6ae3c9d9c4..ab4577f93d9 100644
--- a/arch/c6x/include/asm/irq.h
+++ b/arch/c6x/include/asm/irq.h
@@ -13,6 +13,7 @@
#ifndef _ASM_C6X_IRQ_H
#define _ASM_C6X_IRQ_H
+#include <linux/irqdomain.h>
#include <linux/threads.h>
#include <linux/list.h>
#include <linux/radix-tree.h>
@@ -41,254 +42,6 @@
/* This number is used when no interrupt has been assigned */
#define NO_IRQ 0
-/* This type is the placeholder for a hardware interrupt number. It has to
- * be big enough to enclose whatever representation is used by a given
- * platform.
- */
-typedef unsigned long irq_hw_number_t;
-
-/* Interrupt controller "host" data structure. This could be defined as a
- * irq domain controller. That is, it handles the mapping between hardware
- * and virtual interrupt numbers for a given interrupt domain. The host
- * structure is generally created by the PIC code for a given PIC instance
- * (though a host can cover more than one PIC if they have a flat number
- * model). It's the host callbacks that are responsible for setting the
- * irq_chip on a given irq_desc after it's been mapped.
- *
- * The host code and data structures are fairly agnostic to the fact that
- * we use an open firmware device-tree. We do have references to struct
- * device_node in two places: in irq_find_host() to find the host matching
- * a given interrupt controller node, and of course as an argument to its
- * counterpart host->ops->match() callback. However, those are treated as
- * generic pointers by the core and the fact that it's actually a device-node
- * pointer is purely a convention between callers and implementation. This
- * code could thus be used on other architectures by replacing those two
- * by some sort of arch-specific void * "token" used to identify interrupt
- * controllers.
- */
-struct irq_host;
-struct radix_tree_root;
-struct device_node;
-
-/* Functions below are provided by the host and called whenever a new mapping
- * is created or an old mapping is disposed. The host can then proceed to
- * whatever internal data structures management is required. It also needs
- * to setup the irq_desc when returning from map().
- */
-struct irq_host_ops {
- /* Match an interrupt controller device node to a host, returns
- * 1 on a match
- */
- int (*match)(struct irq_host *h, struct device_node *node);
-
- /* Create or update a mapping between a virtual irq number and a hw
- * irq number. This is called only once for a given mapping.
- */
- int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
-
- /* Dispose of such a mapping */
- void (*unmap)(struct irq_host *h, unsigned int virq);
-
- /* Translate device-tree interrupt specifier from raw format coming
- * from the firmware to a irq_hw_number_t (interrupt line number) and
- * type (sense) that can be passed to set_irq_type(). In the absence
- * of this callback, irq_create_of_mapping() and irq_of_parse_and_map()
- * will return the hw number in the first cell and IRQ_TYPE_NONE for
- * the type (which amount to keeping whatever default value the
- * interrupt controller has for that line)
- */
- int (*xlate)(struct irq_host *h, struct device_node *ctrler,
- const u32 *intspec, unsigned int intsize,
- irq_hw_number_t *out_hwirq, unsigned int *out_type);
-};
-
-struct irq_host {
- struct list_head link;
-
- /* type of reverse mapping technique */
- unsigned int revmap_type;
-#define IRQ_HOST_MAP_PRIORITY 0 /* core priority irqs, get irqs 1..15 */
-#define IRQ_HOST_MAP_NOMAP 1 /* no fast reverse mapping */
-#define IRQ_HOST_MAP_LINEAR 2 /* linear map of interrupts */
-#define IRQ_HOST_MAP_TREE 3 /* radix tree */
- union {
- struct {
- unsigned int size;
- unsigned int *revmap;
- } linear;
- struct radix_tree_root tree;
- } revmap_data;
- struct irq_host_ops *ops;
- void *host_data;
- irq_hw_number_t inval_irq;
-
- /* Optional device node pointer */
- struct device_node *of_node;
-};
-
-struct irq_data;
-extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
-extern irq_hw_number_t virq_to_hw(unsigned int virq);
-extern bool virq_is_host(unsigned int virq, struct irq_host *host);
-
-/**
- * irq_alloc_host - Allocate a new irq_host data structure
- * @of_node: optional device-tree node of the interrupt controller
- * @revmap_type: type of reverse mapping to use
- * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map
- * @ops: map/unmap host callbacks
- * @inval_irq: provide a hw number in that host space that is always invalid
- *
- * Allocates and initialize and irq_host structure. Note that in the case of
- * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns
- * for all legacy interrupts except 0 (which is always the invalid irq for
- * a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by
- * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated
- * later during boot automatically (the reverse mapping will use the slow path
- * until that happens).
- */
-extern struct irq_host *irq_alloc_host(struct device_node *of_node,
- unsigned int revmap_type,
- unsigned int revmap_arg,
- struct irq_host_ops *ops,
- irq_hw_number_t inval_irq);
-
-
-/**
- * irq_find_host - Locates a host for a given device node
- * @node: device-tree node of the interrupt controller
- */
-extern struct irq_host *irq_find_host(struct device_node *node);
-
-
-/**
- * irq_set_default_host - Set a "default" host
- * @host: default host pointer
- *
- * For convenience, it's possible to set a "default" host that will be used
- * whenever NULL is passed to irq_create_mapping(). It makes life easier for
- * platforms that want to manipulate a few hard coded interrupt numbers that
- * aren't properly represented in the device-tree.
- */
-extern void irq_set_default_host(struct irq_host *host);
-
-
-/**
- * irq_set_virq_count - Set the maximum number of virt irqs
- * @count: number of linux virtual irqs, capped with NR_IRQS
- *
- * This is mainly for use by platforms like iSeries who want to program
- * the virtual irq number in the controller to avoid the reverse mapping
- */
-extern void irq_set_virq_count(unsigned int count);
-
-
-/**
- * irq_create_mapping - Map a hardware interrupt into linux virq space
- * @host: host owning this hardware interrupt or NULL for default host
- * @hwirq: hardware irq number in that host space
- *
- * Only one mapping per hardware interrupt is permitted. Returns a linux
- * virq number.
- * If the sense/trigger is to be specified, set_irq_type() should be called
- * on the number returned from that call.
- */
-extern unsigned int irq_create_mapping(struct irq_host *host,
- irq_hw_number_t hwirq);
-
-
-/**
- * irq_dispose_mapping - Unmap an interrupt
- * @virq: linux virq number of the interrupt to unmap
- */
-extern void irq_dispose_mapping(unsigned int virq);
-
-/**
- * irq_find_mapping - Find a linux virq from an hw irq number.
- * @host: host owning this hardware interrupt
- * @hwirq: hardware irq number in that host space
- *
- * This is a slow path, for use by generic code. It's expected that an
- * irq controller implementation directly calls the appropriate low level
- * mapping function.
- */
-extern unsigned int irq_find_mapping(struct irq_host *host,
- irq_hw_number_t hwirq);
-
-/**
- * irq_create_direct_mapping - Allocate a virq for direct mapping
- * @host: host to allocate the virq for or NULL for default host
- *
- * This routine is used for irq controllers which can choose the hardware
- * interrupt numbers they generate. In such a case it's simplest to use
- * the linux virq as the hardware interrupt number.
- */
-extern unsigned int irq_create_direct_mapping(struct irq_host *host);
-
-/**
- * irq_radix_revmap_insert - Insert a hw irq to linux virq number mapping.
- * @host: host owning this hardware interrupt
- * @virq: linux irq number
- * @hwirq: hardware irq number in that host space
- *
- * This is for use by irq controllers that use a radix tree reverse
- * mapping for fast lookup.
- */
-extern void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq,
- irq_hw_number_t hwirq);
-
-/**
- * irq_radix_revmap_lookup - Find a linux virq from a hw irq number.
- * @host: host owning this hardware interrupt
- * @hwirq: hardware irq number in that host space
- *
- * This is a fast path, for use by irq controller code that uses radix tree
- * revmaps
- */
-extern unsigned int irq_radix_revmap_lookup(struct irq_host *host,
- irq_hw_number_t hwirq);
-
-/**
- * irq_linear_revmap - Find a linux virq from a hw irq number.
- * @host: host owning this hardware interrupt
- * @hwirq: hardware irq number in that host space
- *
- * This is a fast path, for use by irq controller code that uses linear
- * revmaps. It does fallback to the slow path if the revmap doesn't exist
- * yet and will create the revmap entry with appropriate locking
- */
-
-extern unsigned int irq_linear_revmap(struct irq_host *host,
- irq_hw_number_t hwirq);
-
-
-
-/**
- * irq_alloc_virt - Allocate virtual irq numbers
- * @host: host owning these new virtual irqs
- * @count: number of consecutive numbers to allocate
- * @hint: pass a hint number, the allocator will try to use a 1:1 mapping
- *
- * This is a low level function that is used internally by irq_create_mapping()
- * and that can be used by some irq controllers implementations for things
- * like allocating ranges of numbers for MSIs. The revmaps are left untouched.
- */
-extern unsigned int irq_alloc_virt(struct irq_host *host,
- unsigned int count,
- unsigned int hint);
-
-/**
- * irq_free_virt - Free virtual irq numbers
- * @virq: virtual irq number of the first interrupt to free
- * @count: number of interrupts to free
- *
- * This function is the opposite of irq_alloc_virt. It will not clear reverse
- * maps, this should be done previously by unmap'ing the interrupt. In fact,
- * all interrupts covered by the range being freed should have been unmapped
- * prior to calling this.
- */
-extern void irq_free_virt(unsigned int virq, unsigned int count);
-
extern void __init init_pic_c64xplus(void);
extern void init_IRQ(void);
diff --git a/arch/c6x/include/asm/pgtable.h b/arch/c6x/include/asm/pgtable.h
index 68c8af4f1f9..38a4312eb2c 100644
--- a/arch/c6x/include/asm/pgtable.h
+++ b/arch/c6x/include/asm/pgtable.h
@@ -73,9 +73,6 @@ extern unsigned long empty_zero_page;
#define pgtable_cache_init() do { } while (0)
#define io_remap_pfn_range remap_pfn_range
-#define io_remap_page_range(vma, vaddr, paddr, size, prot) \
- remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
-
#include <asm-generic/pgtable.h>
#endif /* _ASM_C6X_PGTABLE_H */
diff --git a/arch/c6x/include/asm/processor.h b/arch/c6x/include/asm/processor.h
index 77ecbded1f3..3ff7fab956b 100644
--- a/arch/c6x/include/asm/processor.h
+++ b/arch/c6x/include/asm/processor.h
@@ -129,4 +129,13 @@ extern unsigned long get_wchan(struct task_struct *p);
extern const struct seq_operations cpuinfo_op;
+/* Reset the board */
+#define HARD_RESET_NOW()
+
+extern unsigned int c6x_core_freq;
+
+
+extern void (*c6x_restart)(void);
+extern void (*c6x_halt)(void);
+
#endif /* ASM_C6X_PROCESSOR_H */
diff --git a/arch/c6x/include/asm/setup.h b/arch/c6x/include/asm/setup.h
index 1808f279f82..a01e31896fa 100644
--- a/arch/c6x/include/asm/setup.h
+++ b/arch/c6x/include/asm/setup.h
@@ -27,6 +27,7 @@ extern unsigned int c6x_devstat;
extern unsigned char c6x_fuse_mac[6];
extern void machine_init(unsigned long dt_ptr);
+extern void time_init(void);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_C6X_SETUP_H */
diff --git a/arch/c6x/include/asm/special_insns.h b/arch/c6x/include/asm/special_insns.h
new file mode 100644
index 00000000000..59672bca841
--- /dev/null
+++ b/arch/c6x/include/asm/special_insns.h
@@ -0,0 +1,63 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_SPECIAL_INSNS_H
+#define _ASM_C6X_SPECIAL_INSNS_H
+
+
+#define get_creg(reg) \
+ ({ unsigned int __x; \
+ asm volatile ("mvc .s2 " #reg ",%0\n" : "=b"(__x)); __x; })
+
+#define set_creg(reg, v) \
+ do { unsigned int __x = (unsigned int)(v); \
+ asm volatile ("mvc .s2 %0," #reg "\n" : : "b"(__x)); \
+ } while (0)
+
+#define or_creg(reg, n) \
+ do { unsigned __x, __n = (unsigned)(n); \
+ asm volatile ("mvc .s2 " #reg ",%0\n" \
+ "or .l2 %1,%0,%0\n" \
+ "mvc .s2 %0," #reg "\n" \
+ "nop\n" \
+ : "=&b"(__x) : "b"(__n)); \
+ } while (0)
+
+#define and_creg(reg, n) \
+ do { unsigned __x, __n = (unsigned)(n); \
+ asm volatile ("mvc .s2 " #reg ",%0\n" \
+ "and .l2 %1,%0,%0\n" \
+ "mvc .s2 %0," #reg "\n" \
+ "nop\n" \
+ : "=&b"(__x) : "b"(__n)); \
+ } while (0)
+
+#define get_coreid() (get_creg(DNUM) & 0xff)
+
+/* Set/get IST */
+#define set_ist(x) set_creg(ISTP, x)
+#define get_ist() get_creg(ISTP)
+
+/*
+ * Exception management
+ */
+#define disable_exception()
+#define get_except_type() get_creg(EFR)
+#define ack_exception(type) set_creg(ECR, 1 << (type))
+#define get_iexcept() get_creg(IERR)
+#define set_iexcept(mask) set_creg(IERR, (mask))
+
+#define _extu(x, s, e) \
+ ({ unsigned int __x; \
+ asm volatile ("extu .S2 %3,%1,%2,%0\n" : \
+ "=b"(__x) : "n"(s), "n"(e), "b"(x)); \
+ __x; })
+
+#endif /* _ASM_C6X_SPECIAL_INSNS_H */
diff --git a/arch/c6x/include/asm/switch_to.h b/arch/c6x/include/asm/switch_to.h
new file mode 100644
index 00000000000..af6c71fe75e
--- /dev/null
+++ b/arch/c6x/include/asm/switch_to.h
@@ -0,0 +1,33 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_SWITCH_TO_H
+#define _ASM_C6X_SWITCH_TO_H
+
+#include <linux/linkage.h>
+
+#define prepare_to_switch() do { } while (0)
+
+struct task_struct;
+struct thread_struct;
+asmlinkage void *__switch_to(struct thread_struct *prev,
+ struct thread_struct *next,
+ struct task_struct *tsk);
+
+#define switch_to(prev, next, last) \
+ do { \
+ current->thread.wchan = (u_long) __builtin_return_address(0); \
+ (last) = __switch_to(&(prev)->thread, \
+ &(next)->thread, (prev)); \
+ mb(); \
+ current->thread.wchan = 0; \
+ } while (0)
+
+#endif /* _ASM_C6X_SWITCH_TO_H */
diff --git a/arch/c6x/include/asm/system.h b/arch/c6x/include/asm/system.h
deleted file mode 100644
index e076dc0eacc..00000000000
--- a/arch/c6x/include/asm/system.h
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * Port on Texas Instruments TMS320C6x architecture
- *
- * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
- * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef _ASM_C6X_SYSTEM_H
-#define _ASM_C6X_SYSTEM_H
-
-#include <linux/linkage.h>
-#include <linux/irqflags.h>
-
-#define prepare_to_switch() do { } while (0)
-
-struct task_struct;
-struct thread_struct;
-asmlinkage void *__switch_to(struct thread_struct *prev,
- struct thread_struct *next,
- struct task_struct *tsk);
-
-#define switch_to(prev, next, last) \
- do { \
- current->thread.wchan = (u_long) __builtin_return_address(0); \
- (last) = __switch_to(&(prev)->thread, \
- &(next)->thread, (prev)); \
- mb(); \
- current->thread.wchan = 0; \
- } while (0)
-
-/* Reset the board */
-#define HARD_RESET_NOW()
-
-#define get_creg(reg) \
- ({ unsigned int __x; \
- asm volatile ("mvc .s2 " #reg ",%0\n" : "=b"(__x)); __x; })
-
-#define set_creg(reg, v) \
- do { unsigned int __x = (unsigned int)(v); \
- asm volatile ("mvc .s2 %0," #reg "\n" : : "b"(__x)); \
- } while (0)
-
-#define or_creg(reg, n) \
- do { unsigned __x, __n = (unsigned)(n); \
- asm volatile ("mvc .s2 " #reg ",%0\n" \
- "or .l2 %1,%0,%0\n" \
- "mvc .s2 %0," #reg "\n" \
- "nop\n" \
- : "=&b"(__x) : "b"(__n)); \
- } while (0)
-
-#define and_creg(reg, n) \
- do { unsigned __x, __n = (unsigned)(n); \
- asm volatile ("mvc .s2 " #reg ",%0\n" \
- "and .l2 %1,%0,%0\n" \
- "mvc .s2 %0," #reg "\n" \
- "nop\n" \
- : "=&b"(__x) : "b"(__n)); \
- } while (0)
-
-#define get_coreid() (get_creg(DNUM) & 0xff)
-
-/* Set/get IST */
-#define set_ist(x) set_creg(ISTP, x)
-#define get_ist() get_creg(ISTP)
-
-/*
- * Exception management
- */
-asmlinkage void enable_exception(void);
-#define disable_exception()
-#define get_except_type() get_creg(EFR)
-#define ack_exception(type) set_creg(ECR, 1 << (type))
-#define get_iexcept() get_creg(IERR)
-#define set_iexcept(mask) set_creg(IERR, (mask))
-
-/*
- * Misc. functions
- */
-#define nop() asm("NOP\n");
-#define mb() barrier()
-#define rmb() barrier()
-#define wmb() barrier()
-#define set_mb(var, value) do { var = value; mb(); } while (0)
-#define set_wmb(var, value) do { var = value; wmb(); } while (0)
-
-#define smp_mb() barrier()
-#define smp_rmb() barrier()
-#define smp_wmb() barrier()
-#define smp_read_barrier_depends() do { } while (0)
-
-#define xchg(ptr, x) \
- ((__typeof__(*(ptr)))__xchg((unsigned int)(x), (void *) (ptr), \
- sizeof(*(ptr))))
-#define tas(ptr) xchg((ptr), 1)
-
-unsigned int _lmbd(unsigned int, unsigned int);
-unsigned int _bitr(unsigned int);
-
-struct __xchg_dummy { unsigned int a[100]; };
-#define __xg(x) ((volatile struct __xchg_dummy *)(x))
-
-static inline unsigned int __xchg(unsigned int x, volatile void *ptr, int size)
-{
- unsigned int tmp;
- unsigned long flags;
-
- local_irq_save(flags);
-
- switch (size) {
- case 1:
- tmp = 0;
- tmp = *((unsigned char *) ptr);
- *((unsigned char *) ptr) = (unsigned char) x;
- break;
- case 2:
- tmp = 0;
- tmp = *((unsigned short *) ptr);
- *((unsigned short *) ptr) = x;
- break;
- case 4:
- tmp = 0;
- tmp = *((unsigned int *) ptr);
- *((unsigned int *) ptr) = x;
- break;
- }
- local_irq_restore(flags);
- return tmp;
-}
-
-#include <asm-generic/cmpxchg-local.h>
-
-/*
- * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
- * them available.
- */
-#define cmpxchg_local(ptr, o, n) \
- ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \
- (unsigned long)(o), \
- (unsigned long)(n), \
- sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
-
-#include <asm-generic/cmpxchg.h>
-
-#define _extu(x, s, e) \
- ({ unsigned int __x; \
- asm volatile ("extu .S2 %3,%1,%2,%0\n" : \
- "=b"(__x) : "n"(s), "n"(e), "b"(x)); \
- __x; })
-
-
-extern unsigned int c6x_core_freq;
-
-struct pt_regs;
-
-extern void die(char *str, struct pt_regs *fp, int nr);
-extern asmlinkage int process_exception(struct pt_regs *regs);
-extern void time_init(void);
-extern void free_initmem(void);
-
-extern void (*c6x_restart)(void);
-extern void (*c6x_halt)(void);
-
-#endif /* _ASM_C6X_SYSTEM_H */