1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
202 lines
5.7 KiB
C
202 lines
5.7 KiB
C
#ifdef __KERNEL__
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#ifndef __ASM_PPC_PROCESSOR_H
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#define __ASM_PPC_PROCESSOR_H
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter").
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*/
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#define current_text_addr() ({ __label__ _l; _l: &&_l;})
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#include <linux/config.h>
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#include <linux/stringify.h>
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#include <asm/ptrace.h>
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#include <asm/types.h>
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#include <asm/mpc8xx.h>
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#include <asm/reg.h>
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/* We only need to define a new _MACH_xxx for machines which are part of
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* a configuration which supports more than one type of different machine.
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* This is currently limited to CONFIG_PPC_MULTIPLATFORM and CHRP/PReP/PMac.
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* -- Tom
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*/
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#define _MACH_prep 0x00000001
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#define _MACH_Pmac 0x00000002 /* pmac or pmac clone (non-chrp) */
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#define _MACH_chrp 0x00000004 /* chrp machine */
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/* see residual.h for these */
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#define _PREP_Motorola 0x01 /* motorola prep */
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#define _PREP_Firm 0x02 /* firmworks prep */
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#define _PREP_IBM 0x00 /* ibm prep */
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#define _PREP_Bull 0x03 /* bull prep */
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/* these are arbitrary */
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#define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */
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#define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */
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#define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */
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#define _GLOBAL(n)\
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.stabs __stringify(n:F-1),N_FUN,0,0,n;\
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.globl n;\
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n:
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/*
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* this is the minimum allowable io space due to the location
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* of the io areas on prep (first one at 0x80000000) but
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* as soon as I get around to remapping the io areas with the BATs
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* to match the mac we can raise this. -- Cort
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*/
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#define TASK_SIZE (CONFIG_TASK_SIZE)
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_PPC_MULTIPLATFORM
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extern int _machine;
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/* what kind of prep workstation we are */
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extern int _prep_type;
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extern int _chrp_type;
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/*
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* This is used to identify the board type from a given PReP board
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* vendor. Board revision is also made available.
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*/
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extern unsigned char ucSystemType;
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extern unsigned char ucBoardRev;
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extern unsigned char ucBoardRevMaj, ucBoardRevMin;
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#else
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#define _machine 0
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#endif /* CONFIG_PPC_MULTIPLATFORM */
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struct task_struct;
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void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
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void release_thread(struct task_struct *);
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/* Prepare to copy thread state - unlazy all lazy status */
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extern void prepare_to_copy(struct task_struct *tsk);
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/*
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* Create a new kernel thread.
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*/
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extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
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/* Lazy FPU handling on uni-processor */
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extern struct task_struct *last_task_used_math;
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extern struct task_struct *last_task_used_altivec;
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extern struct task_struct *last_task_used_spe;
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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struct thread_struct {
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unsigned long ksp; /* Kernel stack pointer */
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struct pt_regs *regs; /* Pointer to saved register state */
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mm_segment_t fs; /* for get_fs() validation */
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void *pgdir; /* root of page-table tree */
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int fpexc_mode; /* floating-point exception mode */
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signed long last_syscall;
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#if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
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unsigned long dbcr0; /* debug control register values */
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unsigned long dbcr1;
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#endif
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double fpr[32]; /* Complete floating point set */
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unsigned long fpscr_pad; /* fpr ... fpscr must be contiguous */
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unsigned long fpscr; /* Floating point status */
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#ifdef CONFIG_ALTIVEC
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/* Complete AltiVec register set */
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vector128 vr[32] __attribute((aligned(16)));
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/* AltiVec status */
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vector128 vscr __attribute((aligned(16)));
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unsigned long vrsave;
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int used_vr; /* set if process has used altivec */
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#endif /* CONFIG_ALTIVEC */
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#ifdef CONFIG_SPE
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unsigned long evr[32]; /* upper 32-bits of SPE regs */
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u64 acc; /* Accumulator */
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unsigned long spefscr; /* SPE & eFP status */
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int used_spe; /* set if process has used spe */
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#endif /* CONFIG_SPE */
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};
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#define ARCH_MIN_TASKALIGN 16
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#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
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#define INIT_THREAD { \
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.ksp = INIT_SP, \
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.fs = KERNEL_DS, \
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.pgdir = swapper_pg_dir, \
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.fpexc_mode = MSR_FE0 | MSR_FE1, \
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}
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/*
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* Return saved PC of a blocked thread. For now, this is the "user" PC
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*/
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#define thread_saved_pc(tsk) \
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((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
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unsigned long get_wchan(struct task_struct *p);
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#define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
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#define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
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/* Get/set floating-point exception mode */
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#define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
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#define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))
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extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
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extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);
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static inline unsigned int __unpack_fe01(unsigned int msr_bits)
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{
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return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
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}
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static inline unsigned int __pack_fe01(unsigned int fpmode)
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{
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return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
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}
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/* in process.c - for early bootup debug -- Cort */
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int ll_printk(const char *, ...);
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void ll_puts(const char *);
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/* In misc.c */
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void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
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#define have_of (_machine == _MACH_chrp || _machine == _MACH_Pmac)
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#define cpu_relax() barrier()
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/*
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* Prefetch macros.
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*/
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#define ARCH_HAS_PREFETCH
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#define ARCH_HAS_PREFETCHW
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#define ARCH_HAS_SPINLOCK_PREFETCH
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extern inline void prefetch(const void *x)
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{
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__asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
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}
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extern inline void prefetchw(const void *x)
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{
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__asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
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}
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#define spin_lock_prefetch(x) prefetchw(x)
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extern int emulate_altivec(struct pt_regs *regs);
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#endif /* !__ASSEMBLY__ */
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#endif /* __ASM_PPC_PROCESSOR_H */
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#endif /* __KERNEL__ */
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