202 lines
5.7 KiB
C
202 lines
5.7 KiB
C
#ifdef __KERNEL__
|
|
#ifndef __ASM_PPC_PROCESSOR_H
|
|
#define __ASM_PPC_PROCESSOR_H
|
|
|
|
/*
|
|
* Default implementation of macro that returns current
|
|
* instruction pointer ("program counter").
|
|
*/
|
|
#define current_text_addr() ({ __label__ _l; _l: &&_l;})
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/stringify.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/types.h>
|
|
#include <asm/mpc8xx.h>
|
|
#include <asm/reg.h>
|
|
|
|
/* We only need to define a new _MACH_xxx for machines which are part of
|
|
* a configuration which supports more than one type of different machine.
|
|
* This is currently limited to CONFIG_PPC_MULTIPLATFORM and CHRP/PReP/PMac.
|
|
* -- Tom
|
|
*/
|
|
#define _MACH_prep 0x00000001
|
|
#define _MACH_Pmac 0x00000002 /* pmac or pmac clone (non-chrp) */
|
|
#define _MACH_chrp 0x00000004 /* chrp machine */
|
|
|
|
/* see residual.h for these */
|
|
#define _PREP_Motorola 0x01 /* motorola prep */
|
|
#define _PREP_Firm 0x02 /* firmworks prep */
|
|
#define _PREP_IBM 0x00 /* ibm prep */
|
|
#define _PREP_Bull 0x03 /* bull prep */
|
|
|
|
/* these are arbitrary */
|
|
#define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */
|
|
#define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */
|
|
#define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */
|
|
|
|
#define _GLOBAL(n)\
|
|
.stabs __stringify(n:F-1),N_FUN,0,0,n;\
|
|
.globl n;\
|
|
n:
|
|
|
|
/*
|
|
* this is the minimum allowable io space due to the location
|
|
* of the io areas on prep (first one at 0x80000000) but
|
|
* as soon as I get around to remapping the io areas with the BATs
|
|
* to match the mac we can raise this. -- Cort
|
|
*/
|
|
#define TASK_SIZE (CONFIG_TASK_SIZE)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#ifdef CONFIG_PPC_MULTIPLATFORM
|
|
extern int _machine;
|
|
|
|
/* what kind of prep workstation we are */
|
|
extern int _prep_type;
|
|
extern int _chrp_type;
|
|
|
|
/*
|
|
* This is used to identify the board type from a given PReP board
|
|
* vendor. Board revision is also made available.
|
|
*/
|
|
extern unsigned char ucSystemType;
|
|
extern unsigned char ucBoardRev;
|
|
extern unsigned char ucBoardRevMaj, ucBoardRevMin;
|
|
#else
|
|
#define _machine 0
|
|
#endif /* CONFIG_PPC_MULTIPLATFORM */
|
|
|
|
struct task_struct;
|
|
void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
|
|
void release_thread(struct task_struct *);
|
|
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
|
extern void prepare_to_copy(struct task_struct *tsk);
|
|
|
|
/*
|
|
* Create a new kernel thread.
|
|
*/
|
|
extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
|
|
|
|
/* Lazy FPU handling on uni-processor */
|
|
extern struct task_struct *last_task_used_math;
|
|
extern struct task_struct *last_task_used_altivec;
|
|
extern struct task_struct *last_task_used_spe;
|
|
|
|
/* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's.
|
|
*/
|
|
#define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
|
|
|
|
typedef struct {
|
|
unsigned long seg;
|
|
} mm_segment_t;
|
|
|
|
struct thread_struct {
|
|
unsigned long ksp; /* Kernel stack pointer */
|
|
struct pt_regs *regs; /* Pointer to saved register state */
|
|
mm_segment_t fs; /* for get_fs() validation */
|
|
void *pgdir; /* root of page-table tree */
|
|
int fpexc_mode; /* floating-point exception mode */
|
|
signed long last_syscall;
|
|
#if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
|
|
unsigned long dbcr0; /* debug control register values */
|
|
unsigned long dbcr1;
|
|
#endif
|
|
double fpr[32]; /* Complete floating point set */
|
|
unsigned long fpscr_pad; /* fpr ... fpscr must be contiguous */
|
|
unsigned long fpscr; /* Floating point status */
|
|
#ifdef CONFIG_ALTIVEC
|
|
/* Complete AltiVec register set */
|
|
vector128 vr[32] __attribute((aligned(16)));
|
|
/* AltiVec status */
|
|
vector128 vscr __attribute((aligned(16)));
|
|
unsigned long vrsave;
|
|
int used_vr; /* set if process has used altivec */
|
|
#endif /* CONFIG_ALTIVEC */
|
|
#ifdef CONFIG_SPE
|
|
unsigned long evr[32]; /* upper 32-bits of SPE regs */
|
|
u64 acc; /* Accumulator */
|
|
unsigned long spefscr; /* SPE & eFP status */
|
|
int used_spe; /* set if process has used spe */
|
|
#endif /* CONFIG_SPE */
|
|
};
|
|
|
|
#define ARCH_MIN_TASKALIGN 16
|
|
|
|
#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
|
|
|
|
#define INIT_THREAD { \
|
|
.ksp = INIT_SP, \
|
|
.fs = KERNEL_DS, \
|
|
.pgdir = swapper_pg_dir, \
|
|
.fpexc_mode = MSR_FE0 | MSR_FE1, \
|
|
}
|
|
|
|
/*
|
|
* Return saved PC of a blocked thread. For now, this is the "user" PC
|
|
*/
|
|
#define thread_saved_pc(tsk) \
|
|
((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
|
|
|
|
unsigned long get_wchan(struct task_struct *p);
|
|
|
|
#define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
|
|
#define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
|
|
|
|
/* Get/set floating-point exception mode */
|
|
#define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
|
|
#define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))
|
|
|
|
extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
|
|
extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);
|
|
|
|
static inline unsigned int __unpack_fe01(unsigned int msr_bits)
|
|
{
|
|
return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
|
|
}
|
|
|
|
static inline unsigned int __pack_fe01(unsigned int fpmode)
|
|
{
|
|
return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
|
|
}
|
|
|
|
/* in process.c - for early bootup debug -- Cort */
|
|
int ll_printk(const char *, ...);
|
|
void ll_puts(const char *);
|
|
|
|
/* In misc.c */
|
|
void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
|
|
|
|
#define have_of (_machine == _MACH_chrp || _machine == _MACH_Pmac)
|
|
|
|
#define cpu_relax() barrier()
|
|
|
|
/*
|
|
* Prefetch macros.
|
|
*/
|
|
#define ARCH_HAS_PREFETCH
|
|
#define ARCH_HAS_PREFETCHW
|
|
#define ARCH_HAS_SPINLOCK_PREFETCH
|
|
|
|
extern inline void prefetch(const void *x)
|
|
{
|
|
__asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
|
|
}
|
|
|
|
extern inline void prefetchw(const void *x)
|
|
{
|
|
__asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
|
|
}
|
|
|
|
#define spin_lock_prefetch(x) prefetchw(x)
|
|
|
|
extern int emulate_altivec(struct pt_regs *regs);
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* __ASM_PPC_PROCESSOR_H */
|
|
#endif /* __KERNEL__ */
|