patch-2.4.0-test12 linux/include/asm-parisc/processor.h

• Lines: 342
• Date: Tue Dec 5 12:29:39 2000
• Orig file: v2.4.0-test11/linux/include/asm-parisc/processor.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test11/linux/include/asm-parisc/processor.h linux/include/asm-parisc/processor.h
@@ -0,0 +1,341 @@
+/*
+ * include/asm-parisc/processor.h
+ *
+ * Copyright (C) 1994 Linus Torvalds
+ */
+
+#ifndef __ASM_PARISC_PROCESSOR_H
+#define __ASM_PARISC_PROCESSOR_H
+
+#ifndef __ASSEMBLY__
+#include <linux/threads.h>
+
+#include <asm/hardware.h>
+#include <asm/page.h>
+#include <asm/pdc.h>
+#include <asm/ptrace.h>
+#include <asm/types.h>
+#endif /* __ASSEMBLY__ */
+
+/*
+ * 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	    (PAGE_OFFSET)
+#define TASK_UNMAPPED_BASE  (TASK_SIZE / 3)
+
+#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;
+		struct pdc_model_cpuid /* ARGH */ versions;
+		struct pdc_model_cpuid cpuid;
+#if 0
+		struct pdc_model_caps caps;
+#endif
+		char   sys_model_name[81]; /* PDC-ROM returnes this model name */
+	} pdc;
+
+	char	 	*model_name;
+	char		*cpu_name;
+	char		*family_name;
+};
+
+
+/*
+** Per CPU data structure - ie varies per CPU.
+*/
+struct cpuinfo_parisc {
+	unsigned cpuid;
+
+	struct irq_region *region;
+
+	unsigned long it_value; /* Interval Timer value at last timer interrupt */
+	unsigned long it_delta; /* Interval Timer delta (tic_10ms / HZ * 100) */
+
+	unsigned long hpa;	/* Host Physical address */
+	unsigned long txn_addr;	/* External Interrupt Register or id_eid */
+
+	unsigned long bh_count;		/* number of times bh was invoked */
+	unsigned long irq_count;	/* number of IRQ's since boot */
+	unsigned long irq_max_cr16;	/* longest time to handle a single IRQ */
+};
+
+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()]
+
+extern void identify_cpu(struct cpuinfo_parisc *);
+
+#define EISA_bus 0 /* we don't have ISA support yet */
+#define EISA_bus__is_a_macro /* for versions in ksyms.c */
+#define MCA_bus 0
+#define MCA_bus__is_a_macro /* for versions in ksyms.c */
+
+typedef struct {
+	int seg;  
+} mm_segment_t;
+
+struct thread_struct {
+	struct pt_regs regs;
+	unsigned long  pg_tables;
+	unsigned long  flags;
+}; 
+
+/* Thread struct flags. */
+#define PARISC_KERNEL_DEATH	(1UL << 31)	/* see die_if_kernel()... */
+
+#define INIT_MMAP { &init_mm, 0, 0, NULL, PAGE_SHARED, \
+		    VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
+
+#define INIT_THREAD { {			\
+	{ 0, 0, 0, 0, 0, 0, 0, 0,	\
+	  0, 0, 0, 0, 0, 0, 0, 0,	\
+	  0, 0, 0, 0, 0, 0, 0, 0,	\
+	  0, 0, 0, 0, 0, 0, 0, 0 },	\
+	{ 0, 0, 0, 0, 0, 0, 0, 0,	\
+	  0, 0, 0, 0, 0, 0, 0, 0,	\
+	  0, 0, 0, 0, 0, 0, 0, 0,	\
+	  0, 0, 0, 0, 0, 0, 0, 0 },	\
+	{ 0, 0, 0, 0, 0, 0, 0, 0 },	\
+	{ 0, 0}, { 0, 0}, 0, 0, 0, 0	\
+	}, __pa((unsigned long) swapper_pg_dir) }
+
+/*
+ * Return saved PC of a blocked thread.  This is used by ps mostly.
+ */
+
+extern inline unsigned long thread_saved_pc(struct thread_struct *t)
+{
+	return 0xabcdef;
+}
+
+/*
+ * 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).
+ */
+
+/* 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  |
+   |---------------------------------|  ((current->mm->env_end) + 63 & ~63)
+   |         N bytes of slack        |
+   |---------------------------------|
+   |      envvar and arg strings     |
+   |---------------------------------|
+   |	    ELF auxiliary info	     |
+   |         (up to 28 words)        |
+   |---------------------------------|
+   |  Environment variable pointers  |
+   |         upwards to NULL	     |
+   |---------------------------------|
+   |        Argument pointers        |
+   |         upwards to NULL	     |
+   |---------------------------------|
+   |          argc (1 word)          |
+   -----------------------------------
+
+ *  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.  */
+
+#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;				\
+	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_INIT_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]); 		\
+							\
+	regs->cr30 = (u32) current;			\
+} while(0)
+
+
+#define start_thread(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; 	               		\
+	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_INIT_PSW;			\
+	regs->fr[ 0] = 0LL;                            	\
+	regs->fr[ 1] = 0LL;                            	\
+	regs->fr[ 2] = 0LL;                            	\
+	regs->fr[ 3] = 0LL;                            	\
+	regs->gr[30] = ((current->mm->env_end)+63)&~63;	\
+	regs->gr[31] = pc;				\
+							\
+	get_user(regs->gr[25],&sp[0]);			\
+	regs->gr[24] = (unsigned long) &sp[1];		\
+	regs->gr[23] = 0;                            	\
+							\
+	regs->cr30 = (u32) current;			\
+} while(0)
+
+#ifdef __LP64__
+
+/*
+ * For 64 bit kernels we need a version of start thread for 32 bit
+ * elf files.
+ *
+ * FIXME: It should be possible to not duplicate the above code
+ *        by playing games with concatenation to form both
+ *        macros at compile time. The only difference between
+ *        this macro and the above is the name and the types
+ *        for sp and pc.
+ */
+
+#define start_thread32(regs, new_pc, new_sp) do {         \
+	__u32 *sp = (__u32 *)new_sp;                    \
+	__u32 spaceid = (__u32)current->mm->context;	\
+	__u32 pc = (__u32)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; 	               		\
+	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_INIT_PSW;			\
+	regs->fr[ 0] = 0LL;                            	\
+	regs->fr[ 1] = 0LL;                            	\
+	regs->fr[ 2] = 0LL;                            	\
+	regs->fr[ 3] = 0LL;                            	\
+	regs->gr[30] = ((current->mm->env_end)+63)&~63;	\
+	regs->gr[31] = pc;				\
+							\
+	get_user(regs->gr[25],&sp[0]);			\
+	regs->gr[24] = (unsigned long) &sp[1];		\
+	regs->gr[23] = 0;                            	\
+							\
+	regs->cr30 = (u32) current;			\
+} while(0)
+
+#endif
+
+struct task_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);
+
+#define copy_segments(tsk, mm)	do { } while (0)
+#define release_segments(mm)	do { } while (0)
+#define forget_segments()	do { } while (0)
+
+extern inline unsigned long get_wchan(struct task_struct *p)
+{
+	return 0xdeadbeef; /* XXX */
+}
+
+#define KSTK_EIP(tsk)	(0xdeadbeef)
+#define KSTK_ESP(tsk)	(0xdeadbeef)
+
+/* Be sure to hunt all references to this down when you change the size of
+ * the kernel stack */
+
+#endif /* __ASSEMBLY__ */
+
+#define THREAD_SIZE	(4*PAGE_SIZE)
+
+#define alloc_task_struct() \
+	((struct task_struct *) __get_free_pages(GFP_KERNEL,2))
+#define free_task_struct(p)     free_pages((unsigned long)(p),2)
+#define get_task_struct(tsk)      atomic_inc(&virt_to_page(tsk)->count)
+
+#define init_task (init_task_union.task) 
+#define init_stack (init_task_union.stack)
+
+
+#endif /* __ASM_PARISC_PROCESSOR_H */