+++ /dev/null
-/*
- * 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/threads.h>
-
-#include <asm/prefetch.h>
-#include <asm/hardware.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").
- */
-#ifdef CONFIG_PA20
-#define current_ia(x) __asm__("mfia %0" : "=r"(x))
-#else /* mfia added in pa2.0 */
-#define current_ia(x) __asm__("blr 0,%0\n\tnop" : "=r"(x))
-#endif
-#define current_text_addr() ({ void *pc; current_ia(pc); pc; })
-
-#define TASK_SIZE_OF(tsk) ((tsk)->thread.task_size)
-#define TASK_SIZE TASK_SIZE_OF(current)
-#define TASK_UNMAPPED_BASE (current->thread.map_base)
-
-#define DEFAULT_TASK_SIZE32 (0xFFF00000UL)
-#define DEFAULT_MAP_BASE32 (0x40000000UL)
-
-#ifdef CONFIG_64BIT
-#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
-
-#ifdef __KERNEL__
-
-/* XXX: STACK_TOP actually should be STACK_BOTTOM for parisc.
- * prumpf */
-
-#define STACK_TOP TASK_SIZE
-#define STACK_TOP_MAX DEFAULT_TASK_SIZE
-
-#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;
-
- const char *cpu_name; /* e.g. "PA7300LC (PCX-L2)" */
- const 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
- 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_UAC_NOPRINT (1UL << 0) /* see prctl and unaligned.c */
-#define PARISC_UAC_SIGBUS (1UL << 1)
-#define PARISC_KERNEL_DEATH (1UL << 31) /* see die_if_kernel()... */
-
-#define PARISC_UAC_SHIFT 0
-#define PARISC_UAC_MASK (PARISC_UAC_NOPRINT|PARISC_UAC_SIGBUS)
-
-#define SET_UNALIGN_CTL(task,value) \
- ({ \
- (task)->thread.flags = (((task)->thread.flags & ~PARISC_UAC_MASK) \
- | (((value) << PARISC_UAC_SHIFT) & \
- PARISC_UAC_MASK)); \
- 0; \
- })
-
-#define GET_UNALIGN_CTL(task,addr) \
- ({ \
- put_user(((task)->thread.flags & PARISC_UAC_MASK) \
- >> PARISC_UAC_SHIFT, (int __user *) (addr)); \
- })
-
-#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 CONFIG_64BIT
-#define USER_WIDE_MODE (!test_thread_flag(TIF_32BIT))
-#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])
-
-#define cpu_relax() barrier()
-
-/* Used as a macro to identify the combined VIPT/PIPT cached
- * CPUs which require a guarantee of coherency (no inequivalent
- * aliases with different data, whether clean or not) to operate */
-static inline int parisc_requires_coherency(void)
-{
-#ifdef CONFIG_PA8X00
- return (boot_cpu_data.cpu_type == mako) ||
- (boot_cpu_data.cpu_type == mako2);
-#else
- return 0;
-#endif
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* __ASM_PARISC_PROCESSOR_H */
projects / l4.git / blobdiff