1 files changed, 344 insertions, 0 deletions
diff --git a/include/asm-parisc/processor.h b/include/asm-parisc/processor.h
new file mode 100644
index 000000000000..0b61f51d8467
--- /dev/null
+++ b/include/asm-parisc/processor.h
@@ -0,0 +1,344 @@
+/*
+ * include/asm-parisc/processor.h
+ *
+ * Copyright (C) 1994 Linus Torvalds
+ * Copyright (C) 2001 Grant Grundler
+ */
+#ifndef __ASM_PARISC_PROCESSOR_H
+#define __ASM_PARISC_PROCESSOR_H
+#ifndef __ASSEMBLY__
+#include <linux/config.h>
+#include <linux/threads.h>
+#include <asm/hardware.h>
+#include <asm/page.h>
+#include <asm/pdc.h>
+#include <asm/ptrace.h>
+#include <asm/types.h>
+#include <asm/system.h>
+#endif /* __ASSEMBLY__ */
+#define KERNEL_STACK_SIZE       (4*PAGE_SIZE)
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+/* We cannot use MFIA as it was added for PA2.0 - prumpf
+   At one point there were no "0f/0b" type local symbols in gas for
+   PA-RISC.  This is no longer true, but this still seems like the
+   nicest way to implement this. */
+#define current_text_addr() ({ void *pc; __asm__("\n\tblr 0,%0\n\tnop":"=r" (pc)); pc; })
+#define TASK_SIZE               (current->thread.task_size)
+#define TASK_UNMAPPED_BASE      (current->thread.map_base)
+#define DEFAULT_TASK_SIZE32     (0xFFF00000UL)
+#define DEFAULT_MAP_BASE32      (0x40000000UL)
+#ifdef __LP64__
+#define DEFAULT_TASK_SIZE       (MAX_ADDRESS-0xf000000)
+#define DEFAULT_MAP_BASE        (0x200000000UL)
+#else
+#define DEFAULT_TASK_SIZE       DEFAULT_TASK_SIZE32
+#define DEFAULT_MAP_BASE        DEFAULT_MAP_BASE32
+#endif
+#ifndef __ASSEMBLY__
+/*
+ * Data detected about CPUs at boot time which is the same for all CPU's.
+ * HP boxes are SMP - ie identical processors.
+ *
+ * FIXME: some CPU rev info may be processor specific...
+ */
+struct system_cpuinfo_parisc {
+        unsigned int    cpu_count;
+        unsigned int    cpu_hz;
+        unsigned int    hversion;
+        unsigned int    sversion;
+        enum cpu_type   cpu_type;
+        struct {
+                struct pdc_model model;
+                unsigned long versions;
+                unsigned long cpuid;
+                unsigned long capabilities;
+                char   sys_model_name[81]; /* PDC-ROM returnes this model name */
+        } pdc;
+        char            *cpu_name;      /* e.g. "PA7300LC (PCX-L2)" */
+        char            *family_name;   /* e.g. "1.1e" */
+};
+/* Per CPU data structure - ie varies per CPU.  */
+struct cpuinfo_parisc {
+        unsigned long it_value;     /* Interval Timer at last timer Intr */
+        unsigned long it_delta;     /* Interval delta (tic_10ms / HZ * 100) */
+        unsigned long irq_count;    /* number of IRQ's since boot */
+        unsigned long irq_max_cr16; /* longest time to handle a single IRQ */
+        unsigned long cpuid;        /* aka slot_number or set to NO_PROC_ID */
+        unsigned long hpa;          /* Host Physical address */
+        unsigned long txn_addr;     /* MMIO addr of EIR or id_eid */
+#ifdef CONFIG_SMP
+        spinlock_t lock;            /* synchronization for ipi's */
+        unsigned long pending_ipi;  /* bitmap of type ipi_message_type */
+        unsigned long ipi_count;    /* number ipi Interrupts */
+#endif
+        unsigned long bh_count;     /* number of times bh was invoked */
+        unsigned long prof_counter; /* per CPU profiling support */
+        unsigned long prof_multiplier;  /* per CPU profiling support */
+        unsigned long fp_rev;
+        unsigned long fp_model;
+        unsigned int state;
+        struct parisc_device *dev;
+        unsigned long loops_per_jiffy;
+};
+extern struct system_cpuinfo_parisc boot_cpu_data;
+extern struct cpuinfo_parisc cpu_data[NR_CPUS];
+#define current_cpu_data cpu_data[smp_processor_id()]
+#define CPU_HVERSION ((boot_cpu_data.hversion >> 4) & 0x0FFF)
+typedef struct {
+        int seg;  
+} mm_segment_t;
+#define ARCH_MIN_TASKALIGN      8
+struct thread_struct {
+        struct pt_regs regs;
+        unsigned long  task_size;
+        unsigned long  map_base;
+        unsigned long  flags;
+}; 
+/* Thread struct flags. */
+#define PARISC_KERNEL_DEATH     (1UL << 31)     /* see die_if_kernel()... */
+#define INIT_THREAD { \
+        regs:   {       gr: { 0, }, \
+                        fr: { 0, }, \
+                        sr: { 0, }, \
+                        iasq: { 0, }, \
+                        iaoq: { 0, }, \
+                        cr27: 0, \
+                }, \
+        task_size:      DEFAULT_TASK_SIZE, \
+        map_base:       DEFAULT_MAP_BASE, \
+        flags:          0 \
+        }
+/*
+ * Return saved PC of a blocked thread.  This is used by ps mostly.
+ */
+unsigned long thread_saved_pc(struct task_struct *t);
+void show_trace(struct task_struct *task, unsigned long *stack);
+/*
+ * Start user thread in another space.
+ *
+ * Note that we set both the iaoq and r31 to the new pc. When
+ * the kernel initially calls execve it will return through an
+ * rfi path that will use the values in the iaoq. The execve
+ * syscall path will return through the gateway page, and
+ * that uses r31 to branch to.
+ *
+ * For ELF we clear r23, because the dynamic linker uses it to pass
+ * the address of the finalizer function.
+ *
+ * We also initialize sr3 to an illegal value (illegal for our
+ * implementation, not for the architecture).
+ */
+typedef unsigned int elf_caddr_t;
+#define start_thread_som(regs, new_pc, new_sp) do {     \
+        unsigned long *sp = (unsigned long *)new_sp;    \
+        __u32 spaceid = (__u32)current->mm->context;    \
+        unsigned long pc = (unsigned long)new_pc;       \
+        /* offset pc for priv. level */                 \
+        pc |= 3;                                        \
+                                                        \
+        set_fs(USER_DS);                                \
+        regs->iasq[0] = spaceid;                        \
+        regs->iasq[1] = spaceid;                        \
+        regs->iaoq[0] = pc;                             \
+        regs->iaoq[1] = pc + 4;                         \
+        regs->sr[2] = LINUX_GATEWAY_SPACE;              \
+        regs->sr[3] = 0xffff;                           \
+        regs->sr[4] = spaceid;                          \
+        regs->sr[5] = spaceid;                          \
+        regs->sr[6] = spaceid;                          \
+        regs->sr[7] = spaceid;                          \
+        regs->gr[ 0] = USER_PSW;                        \
+        regs->gr[30] = ((new_sp)+63)&~63;               \
+        regs->gr[31] = pc;                              \
+                                                        \
+        get_user(regs->gr[26],&sp[0]);                  \
+        get_user(regs->gr[25],&sp[-1]);                 \
+        get_user(regs->gr[24],&sp[-2]);                 \
+        get_user(regs->gr[23],&sp[-3]);                 \
+} while(0)
+/* The ELF abi wants things done a "wee bit" differently than
+ * som does.  Supporting this behavior here avoids
+ * having our own version of create_elf_tables.
+ *
+ * Oh, and yes, that is not a typo, we are really passing argc in r25
+ * and argv in r24 (rather than r26 and r25).  This is because that's
+ * where __libc_start_main wants them.
+ *
+ * Duplicated from dl-machine.h for the benefit of readers:
+ *
+ *  Our initial stack layout is rather different from everyone else's
+ *  due to the unique PA-RISC ABI.  As far as I know it looks like
+ *  this:
+   -----------------------------------  (user startup code creates this frame)
+   |         32 bytes of magic       |
+   |---------------------------------|
+   | 32 bytes argument/sp save area  |
+   |---------------------------------| (bprm->p)
+   |        ELF auxiliary info       |
+   |         (up to 28 words)        |
+   |---------------------------------|
+   |               NULL              |
+   |---------------------------------|
+   |       Environment pointers      |
+   |---------------------------------|
+   |               NULL              |
+   |---------------------------------|
+   |        Argument pointers        |
+   |---------------------------------| <- argv
+   |          argc (1 word)          |
+   |---------------------------------| <- bprm->exec (HACK!)
+   |         N bytes of slack        |
+   |---------------------------------|
+   |    filename passed to execve    |
+   |---------------------------------| (mm->env_end)
+   |           env strings           |
+   |---------------------------------| (mm->env_start, mm->arg_end)
+   |           arg strings           |
+   |---------------------------------|
+   | additional faked arg strings if |
+   | we're invoked via binfmt_script |
+   |---------------------------------| (mm->arg_start)
+   stack base is at TASK_SIZE - rlim_max.
+on downward growing arches, it looks like this:
+   stack base at TASK_SIZE
+   | filename passed to execve
+   | env strings
+   | arg strings
+   | faked arg strings
+   | slack
+   | ELF
+   | envps
+   | argvs
+   | argc
+ *  The pleasant part of this is that if we need to skip arguments we
+ *  can just decrement argc and move argv, because the stack pointer
+ *  is utterly unrelated to the location of the environment and
+ *  argument vectors.
+ *
+ * Note that the S/390 people took the easy way out and hacked their
+ * GCC to make the stack grow downwards.
+ *
+ * Final Note: For entry from syscall, the W (wide) bit of the PSW
+ * is stuffed into the lowest bit of the user sp (%r30), so we fill
+ * it in here from the current->personality
+ */
+#ifdef __LP64__
+#define USER_WIDE_MODE  (personality(current->personality) == PER_LINUX)
+#else
+#define USER_WIDE_MODE  0
+#endif
+#define start_thread(regs, new_pc, new_sp) do {         \
+        elf_addr_t *sp = (elf_addr_t *)new_sp;          \
+        __u32 spaceid = (__u32)current->mm->context;    \
+        elf_addr_t pc = (elf_addr_t)new_pc | 3;         \
+        elf_caddr_t *argv = (elf_caddr_t *)bprm->exec + 1;      \
+                                                        \
+        set_fs(USER_DS);                                \
+        regs->iasq[0] = spaceid;                        \
+        regs->iasq[1] = spaceid;                        \
+        regs->iaoq[0] = pc;                             \
+        regs->iaoq[1] = pc + 4;                         \
+        regs->sr[2] = LINUX_GATEWAY_SPACE;              \
+        regs->sr[3] = 0xffff;                           \
+        regs->sr[4] = spaceid;                          \
+        regs->sr[5] = spaceid;                          \
+        regs->sr[6] = spaceid;                          \
+        regs->sr[7] = spaceid;                          \
+        regs->gr[ 0] = USER_PSW | (USER_WIDE_MODE ? PSW_W : 0); \
+        regs->fr[ 0] = 0LL;                             \
+        regs->fr[ 1] = 0LL;                             \
+        regs->fr[ 2] = 0LL;                             \
+        regs->fr[ 3] = 0LL;                             \
+        regs->gr[30] = (((unsigned long)sp + 63) &~ 63) | (USER_WIDE_MODE ? 1 : 0); \
+        regs->gr[31] = pc;                              \
+                                                        \
+        get_user(regs->gr[25], (argv - 1));             \
+        regs->gr[24] = (long) argv;                     \
+        regs->gr[23] = 0;                               \
+} while(0)
+struct task_struct;
+struct mm_struct;
+/* Free all resources held by a thread. */
+extern void release_thread(struct task_struct *);
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk)    do { } while (0)
+extern void map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm);
+extern unsigned long get_wchan(struct task_struct *p);
+#define KSTK_EIP(tsk)   ((tsk)->thread.regs.iaoq[0])
+#define KSTK_ESP(tsk)   ((tsk)->thread.regs.gr[30])
+/*
+ * PA 2.0 defines data prefetch instructions on page 6-11 of the Kane book.
+ * In addition, many implementations do hardware prefetching of both
+ * instructions and data.
+ *
+ * PA7300LC (page 14-4 of the ERS) also implements prefetching by a load
+ * to gr0 but not in a way that Linux can use.  If the load would cause an
+ * interruption (eg due to prefetching 0), it is suppressed on PA2.0
+ * processors, but not on 7300LC.
+ */
+#ifdef  CONFIG_PREFETCH
+#define ARCH_HAS_PREFETCH
+#define ARCH_HAS_PREFETCHW
+extern inline void prefetch(const void *addr)
+{
+        __asm__("ldw 0(%0), %%r0" : : "r" (addr));
+}
+extern inline void prefetchw(const void *addr)
+{
+        __asm__("ldd 0(%0), %%r0" : : "r" (addr));
+}
+#endif
+#define cpu_relax()     barrier()
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_PARISC_PROCESSOR_H */

diff --git a/include/asm-parisc/processor.h b/include/asm-parisc/processor.h new file mode 100644 index 000000000000..0b61f51d8467 --- /dev/null +++ b/include/asm-parisc/processor.h
@@ -0,0 +1,344 @@
	1	/*
	2	* include/asm-parisc/processor.h
	3	*
	4	* Copyright (C) 1994 Linus Torvalds
	5	* Copyright (C) 2001 Grant Grundler
	6	*/
	7
	8	#ifndef __ASM_PARISC_PROCESSOR_H
	9	#define __ASM_PARISC_PROCESSOR_H
	10
	11	#ifndef __ASSEMBLY__
	12	#include <linux/config.h>
	13	#include <linux/threads.h>
	14
	15	#include <asm/hardware.h>
	16	#include <asm/page.h>
	17	#include <asm/pdc.h>
	18	#include <asm/ptrace.h>
	19	#include <asm/types.h>
	20	#include <asm/system.h>
	21	#endif /* __ASSEMBLY__ */
	22
	23	#define KERNEL_STACK_SIZE (4*PAGE_SIZE)
	24
	25	/*
	26	* Default implementation of macro that returns current
	27	* instruction pointer ("program counter").
	28	*/
	29
	30	/* We cannot use MFIA as it was added for PA2.0 - prumpf
	31
	32	At one point there were no "0f/0b" type local symbols in gas for
	33	PA-RISC. This is no longer true, but this still seems like the
	34	nicest way to implement this. */
	35
	36	#define current_text_addr() ({ void *pc; __asm__("\n\tblr 0,%0\n\tnop":"=r" (pc)); pc; })
	37
	38	#define TASK_SIZE (current->thread.task_size)
	39	#define TASK_UNMAPPED_BASE (current->thread.map_base)
	40
	41	#define DEFAULT_TASK_SIZE32 (0xFFF00000UL)
	42	#define DEFAULT_MAP_BASE32 (0x40000000UL)
	43
	44	#ifdef __LP64__
	45	#define DEFAULT_TASK_SIZE (MAX_ADDRESS-0xf000000)
	46	#define DEFAULT_MAP_BASE (0x200000000UL)
	47	#else
	48	#define DEFAULT_TASK_SIZE DEFAULT_TASK_SIZE32
	49	#define DEFAULT_MAP_BASE DEFAULT_MAP_BASE32
	50	#endif
	51
	52	#ifndef __ASSEMBLY__
	53
	54	/*
	55	* Data detected about CPUs at boot time which is the same for all CPU's.
	56	* HP boxes are SMP - ie identical processors.
	57	*
	58	* FIXME: some CPU rev info may be processor specific...
	59	*/
	60	struct system_cpuinfo_parisc {
	61	unsigned int cpu_count;
	62	unsigned int cpu_hz;
	63	unsigned int hversion;
	64	unsigned int sversion;
	65	enum cpu_type cpu_type;
	66
	67	struct {
	68	struct pdc_model model;
	69	unsigned long versions;
	70	unsigned long cpuid;
	71	unsigned long capabilities;
	72	char sys_model_name[81]; /* PDC-ROM returnes this model name */
	73	} pdc;
	74
	75	char cpu_name; / e.g. "PA7300LC (PCX-L2)" */
	76	char family_name; / e.g. "1.1e" */
	77	};
	78
	79
	80	/* Per CPU data structure - ie varies per CPU. */
	81	struct cpuinfo_parisc {
	82	unsigned long it_value; /* Interval Timer at last timer Intr */
	83	unsigned long it_delta; /* Interval delta (tic_10ms / HZ * 100) */
	84	unsigned long irq_count; /* number of IRQ's since boot */
	85	unsigned long irq_max_cr16; /* longest time to handle a single IRQ */
	86	unsigned long cpuid; /* aka slot_number or set to NO_PROC_ID */
	87	unsigned long hpa; /* Host Physical address */
	88	unsigned long txn_addr; /* MMIO addr of EIR or id_eid */
	89	#ifdef CONFIG_SMP
	90	spinlock_t lock; /* synchronization for ipi's */
	91	unsigned long pending_ipi; /* bitmap of type ipi_message_type */
	92	unsigned long ipi_count; /* number ipi Interrupts */
	93	#endif
	94	unsigned long bh_count; /* number of times bh was invoked */
	95	unsigned long prof_counter; /* per CPU profiling support */
	96	unsigned long prof_multiplier; /* per CPU profiling support */
	97	unsigned long fp_rev;
	98	unsigned long fp_model;
	99	unsigned int state;
	100	struct parisc_device *dev;
	101	unsigned long loops_per_jiffy;
	102	};
	103
	104	extern struct system_cpuinfo_parisc boot_cpu_data;
	105	extern struct cpuinfo_parisc cpu_data[NR_CPUS];
	106	#define current_cpu_data cpu_data[smp_processor_id()]
	107
	108	#define CPU_HVERSION ((boot_cpu_data.hversion >> 4) & 0x0FFF)
	109
	110	typedef struct {
	111	int seg;
	112	} mm_segment_t;
	113
	114	#define ARCH_MIN_TASKALIGN 8
	115
	116	struct thread_struct {
	117	struct pt_regs regs;
	118	unsigned long task_size;
	119	unsigned long map_base;
	120	unsigned long flags;
	121	};
	122
	123	/* Thread struct flags. */
	124	#define PARISC_KERNEL_DEATH (1UL << 31) /* see die_if_kernel()... */
	125
	126	#define INIT_THREAD { \
	127	regs: { gr: { 0, }, \
	128	fr: { 0, }, \
	129	sr: { 0, }, \
	130	iasq: { 0, }, \
	131	iaoq: { 0, }, \
	132	cr27: 0, \
	133	}, \
	134	task_size: DEFAULT_TASK_SIZE, \
	135	map_base: DEFAULT_MAP_BASE, \
	136	flags: 0 \
	137	}
	138
	139	/*
	140	* Return saved PC of a blocked thread. This is used by ps mostly.
	141	*/
	142
	143	unsigned long thread_saved_pc(struct task_struct *t);
	144	void show_trace(struct task_struct task, unsigned long stack);
	145
	146	/*
	147	* Start user thread in another space.
	148	*
	149	* Note that we set both the iaoq and r31 to the new pc. When
	150	* the kernel initially calls execve it will return through an
	151	* rfi path that will use the values in the iaoq. The execve
	152	* syscall path will return through the gateway page, and
	153	* that uses r31 to branch to.
	154	*
	155	* For ELF we clear r23, because the dynamic linker uses it to pass
	156	* the address of the finalizer function.
	157	*
	158	* We also initialize sr3 to an illegal value (illegal for our
	159	* implementation, not for the architecture).
	160	*/
	161	typedef unsigned int elf_caddr_t;
	162
	163	#define start_thread_som(regs, new_pc, new_sp) do { \
	164	unsigned long sp = (unsigned long )new_sp; \
	165	__u32 spaceid = (__u32)current->mm->context; \
	166	unsigned long pc = (unsigned long)new_pc; \
	167	/* offset pc for priv. level */ \
	168	pc \|= 3; \
	169	\
	170	set_fs(USER_DS); \
	171	regs->iasq[0] = spaceid; \
	172	regs->iasq[1] = spaceid; \
	173	regs->iaoq[0] = pc; \
	174	regs->iaoq[1] = pc + 4; \
	175	regs->sr[2] = LINUX_GATEWAY_SPACE; \
	176	regs->sr[3] = 0xffff; \
	177	regs->sr[4] = spaceid; \
	178	regs->sr[5] = spaceid; \
	179	regs->sr[6] = spaceid; \
	180	regs->sr[7] = spaceid; \
	181	regs->gr[ 0] = USER_PSW; \
	182	regs->gr[30] = ((new_sp)+63)&~63; \
	183	regs->gr[31] = pc; \
	184	\
	185	get_user(regs->gr[26],&sp[0]); \
	186	get_user(regs->gr[25],&sp[-1]); \
	187	get_user(regs->gr[24],&sp[-2]); \
	188	get_user(regs->gr[23],&sp[-3]); \
	189	} while(0)
	190
	191	/* The ELF abi wants things done a "wee bit" differently than
	192	* som does. Supporting this behavior here avoids
	193	* having our own version of create_elf_tables.
	194	*
	195	* Oh, and yes, that is not a typo, we are really passing argc in r25
	196	* and argv in r24 (rather than r26 and r25). This is because that's
	197	* where __libc_start_main wants them.
	198	*
	199	* Duplicated from dl-machine.h for the benefit of readers:
	200	*
	201	* Our initial stack layout is rather different from everyone else's
	202	* due to the unique PA-RISC ABI. As far as I know it looks like
	203	* this:
	204
	205	----------------------------------- (user startup code creates this frame)
	206	\| 32 bytes of magic \|
	207	\|---------------------------------\|
	208	\| 32 bytes argument/sp save area \|
	209	\|---------------------------------\| (bprm->p)
	210	\| ELF auxiliary info \|
	211	\| (up to 28 words) \|
	212	\|---------------------------------\|
	213	\| NULL \|
	214	\|---------------------------------\|
	215	\| Environment pointers \|
	216	\|---------------------------------\|
	217	\| NULL \|
	218	\|---------------------------------\|
	219	\| Argument pointers \|
	220	\|---------------------------------\| <- argv
	221	\| argc (1 word) \|
	222	\|---------------------------------\| <- bprm->exec (HACK!)
	223	\| N bytes of slack \|
	224	\|---------------------------------\|
	225	\| filename passed to execve \|
	226	\|---------------------------------\| (mm->env_end)
	227	\| env strings \|
	228	\|---------------------------------\| (mm->env_start, mm->arg_end)
	229	\| arg strings \|
	230	\|---------------------------------\|
	231	\| additional faked arg strings if \|
	232	\| we're invoked via binfmt_script \|
	233	\|---------------------------------\| (mm->arg_start)
	234	stack base is at TASK_SIZE - rlim_max.
	235
	236	on downward growing arches, it looks like this:
	237	stack base at TASK_SIZE
	238	\| filename passed to execve
	239	\| env strings
	240	\| arg strings
	241	\| faked arg strings
	242	\| slack
	243	\| ELF
	244	\| envps
	245	\| argvs
	246	\| argc
	247
	248	* The pleasant part of this is that if we need to skip arguments we
	249	* can just decrement argc and move argv, because the stack pointer
	250	* is utterly unrelated to the location of the environment and
	251	* argument vectors.
	252	*
	253	* Note that the S/390 people took the easy way out and hacked their
	254	* GCC to make the stack grow downwards.
	255	*
	256	* Final Note: For entry from syscall, the W (wide) bit of the PSW
	257	* is stuffed into the lowest bit of the user sp (%r30), so we fill
	258	* it in here from the current->personality
	259	*/
	260
	261	#ifdef __LP64__
	262	#define USER_WIDE_MODE (personality(current->personality) == PER_LINUX)
	263	#else
	264	#define USER_WIDE_MODE 0
	265	#endif
	266
	267	#define start_thread(regs, new_pc, new_sp) do { \
	268	elf_addr_t sp = (elf_addr_t )new_sp; \
	269	__u32 spaceid = (__u32)current->mm->context; \
	270	elf_addr_t pc = (elf_addr_t)new_pc \| 3; \
	271	elf_caddr_t argv = (elf_caddr_t )bprm->exec + 1; \
	272	\
	273	set_fs(USER_DS); \
	274	regs->iasq[0] = spaceid; \
	275	regs->iasq[1] = spaceid; \
	276	regs->iaoq[0] = pc; \
	277	regs->iaoq[1] = pc + 4; \
	278	regs->sr[2] = LINUX_GATEWAY_SPACE; \
	279	regs->sr[3] = 0xffff; \
	280	regs->sr[4] = spaceid; \
	281	regs->sr[5] = spaceid; \
	282	regs->sr[6] = spaceid; \
	283	regs->sr[7] = spaceid; \
	284	regs->gr[ 0] = USER_PSW \| (USER_WIDE_MODE ? PSW_W : 0); \
	285	regs->fr[ 0] = 0LL; \
	286	regs->fr[ 1] = 0LL; \
	287	regs->fr[ 2] = 0LL; \
	288	regs->fr[ 3] = 0LL; \
	289	regs->gr[30] = (((unsigned long)sp + 63) &~ 63) \| (USER_WIDE_MODE ? 1 : 0); \
	290	regs->gr[31] = pc; \
	291	\
	292	get_user(regs->gr[25], (argv - 1)); \
	293	regs->gr[24] = (long) argv; \
	294	regs->gr[23] = 0; \
	295	} while(0)
	296
	297	struct task_struct;
	298	struct mm_struct;
	299
	300	/* Free all resources held by a thread. */
	301	extern void release_thread(struct task_struct *);
	302	extern int kernel_thread(int (fn)(void ), void * arg, unsigned long flags);
	303
	304	/* Prepare to copy thread state - unlazy all lazy status */
	305	#define prepare_to_copy(tsk) do { } while (0)
	306
	307	extern void map_hpux_gateway_page(struct task_struct tsk, struct mm_struct mm);
	308
	309	extern unsigned long get_wchan(struct task_struct *p);
	310
	311	#define KSTK_EIP(tsk) ((tsk)->thread.regs.iaoq[0])
	312	#define KSTK_ESP(tsk) ((tsk)->thread.regs.gr[30])
	313
	314
	315	/*
	316	* PA 2.0 defines data prefetch instructions on page 6-11 of the Kane book.
	317	* In addition, many implementations do hardware prefetching of both
	318	* instructions and data.
	319	*
	320	* PA7300LC (page 14-4 of the ERS) also implements prefetching by a load
	321	* to gr0 but not in a way that Linux can use. If the load would cause an
	322	* interruption (eg due to prefetching 0), it is suppressed on PA2.0
	323	* processors, but not on 7300LC.
	324	*/
	325	#ifdef CONFIG_PREFETCH
	326	#define ARCH_HAS_PREFETCH
	327	#define ARCH_HAS_PREFETCHW
	328
	329	extern inline void prefetch(const void *addr)
	330	{
	331	__asm__("ldw 0(%0), %%r0" : : "r" (addr));
	332	}
	333
	334	extern inline void prefetchw(const void *addr)
	335	{
	336	__asm__("ldd 0(%0), %%r0" : : "r" (addr));
	337	}
	338	#endif
	339
	340	#define cpu_relax() barrier()
	341
	342	#endif /* __ASSEMBLY__ */
	343
	344	#endif /* __ASM_PARISC_PROCESSOR_H */