2 #ifndef __ASM_PPC_PROCESSOR_H
3 #define __ASM_PPC_PROCESSOR_H
6 * Default implementation of macro that returns current
7 * instruction pointer ("program counter").
9 #define current_text_addr() ({ __label__ _l; _l: &&_l;})
11 #include <linux/config.h>
12 #include <linux/stringify.h>
14 #include <asm/ptrace.h>
15 #include <asm/types.h>
16 #include <asm/mpc8xx.h>
19 /* We only need to define a new _MACH_xxx for machines which are part of
20 * a configuration which supports more than one type of different machine.
21 * This is currently limited to CONFIG_PPC_MULTIPLATFORM and CHRP/PReP/PMac.
24 #define _MACH_prep 0x00000001
25 #define _MACH_Pmac 0x00000002 /* pmac or pmac clone (non-chrp) */
26 #define _MACH_chrp 0x00000004 /* chrp machine */
28 /* see residual.h for these */
29 #define _PREP_Motorola 0x01 /* motorola prep */
30 #define _PREP_Firm 0x02 /* firmworks prep */
31 #define _PREP_IBM 0x00 /* ibm prep */
32 #define _PREP_Bull 0x03 /* bull prep */
34 /* these are arbitrary */
35 #define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */
36 #define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */
37 #define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */
40 .stabs __stringify(n:F-1),N_FUN,0,0,n;\
45 * this is the minimum allowable io space due to the location
46 * of the io areas on prep (first one at 0x80000000) but
47 * as soon as I get around to remapping the io areas with the BATs
48 * to match the mac we can raise this. -- Cort
50 #define TASK_SIZE (CONFIG_TASK_SIZE)
53 #ifdef CONFIG_PPC_MULTIPLATFORM
56 /* what kind of prep workstation we are */
57 extern int _prep_type;
58 extern int _chrp_type;
61 * This is used to identify the board type from a given PReP board
62 * vendor. Board revision is also made available.
64 extern unsigned char ucSystemType;
65 extern unsigned char ucBoardRev;
66 extern unsigned char ucBoardRevMaj, ucBoardRevMin;
69 #endif /* CONFIG_PPC_MULTIPLATFORM */
72 void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
73 void release_thread(struct task_struct *);
75 /* Prepare to copy thread state - unlazy all lazy status */
76 extern void prepare_to_copy(struct task_struct *tsk);
79 * Create a new kernel thread.
81 extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
83 /* Lazy FPU handling on uni-processor */
84 extern struct task_struct *last_task_used_math;
85 extern struct task_struct *last_task_used_altivec;
86 extern struct task_struct *last_task_used_spe;
88 /* This decides where the kernel will search for a free chunk of vm
89 * space during mmap's.
91 #define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
97 struct thread_struct {
98 unsigned long ksp; /* Kernel stack pointer */
99 struct pt_regs *regs; /* Pointer to saved register state */
100 mm_segment_t fs; /* for get_fs() validation */
101 void *pgdir; /* root of page-table tree */
102 int fpexc_mode; /* floating-point exception mode */
103 signed long last_syscall;
104 #if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
105 unsigned long dbcr0; /* debug control register values */
108 double fpr[32]; /* Complete floating point set */
109 unsigned long fpscr_pad; /* fpr ... fpscr must be contiguous */
110 unsigned long fpscr; /* Floating point status */
111 #ifdef CONFIG_ALTIVEC
112 /* Complete AltiVec register set */
113 vector128 vr[32] __attribute((aligned(16)));
115 vector128 vscr __attribute((aligned(16)));
116 unsigned long vrsave;
117 int used_vr; /* set if process has used altivec */
118 #endif /* CONFIG_ALTIVEC */
120 unsigned long evr[32]; /* upper 32-bits of SPE regs */
121 u64 acc; /* Accumulator */
122 unsigned long spefscr; /* SPE & eFP status */
123 int used_spe; /* set if process has used spe */
124 #endif /* CONFIG_SPE */
127 #define ARCH_MIN_TASKALIGN 16
129 #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
131 #define INIT_THREAD { \
134 .pgdir = swapper_pg_dir, \
135 .fpexc_mode = MSR_FE0 | MSR_FE1, \
139 * Return saved PC of a blocked thread. For now, this is the "user" PC
141 #define thread_saved_pc(tsk) \
142 ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
144 unsigned long get_wchan(struct task_struct *p);
146 #define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
147 #define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
149 /* Get/set floating-point exception mode */
150 #define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
151 #define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))
153 extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
154 extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);
156 static inline unsigned int __unpack_fe01(unsigned int msr_bits)
158 return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
161 static inline unsigned int __pack_fe01(unsigned int fpmode)
163 return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
166 /* in process.c - for early bootup debug -- Cort */
167 int ll_printk(const char *, ...);
168 void ll_puts(const char *);
171 void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
173 #define have_of (_machine == _MACH_chrp || _machine == _MACH_Pmac)
175 #define cpu_relax() barrier()
180 #define ARCH_HAS_PREFETCH
181 #define ARCH_HAS_PREFETCHW
182 #define ARCH_HAS_SPINLOCK_PREFETCH
184 extern inline void prefetch(const void *x)
186 __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
189 extern inline void prefetchw(const void *x)
191 __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
194 #define spin_lock_prefetch(x) prefetchw(x)
196 extern int emulate_altivec(struct pt_regs *regs);
198 #endif /* !__ASSEMBLY__ */
200 #endif /* __ASM_PPC_PROCESSOR_H */
201 #endif /* __KERNEL__ */