1 files changed, 281 insertions, 0 deletions

diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
new file mode 100644
index 000000000000..1dc4bf7b52b3
--- /dev/null
+++ b/include/asm-powerpc/processor.h
@@ -0,0 +1,281 @@
+#ifndef _ASM_POWERPC_PROCESSOR_H
+#define _ASM_POWERPC_PROCESSOR_H
+
+/*
+ * Copyright (C) 2001 PPC 64 Team, IBM Corp
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <asm/reg.h>
+
+#ifndef __ASSEMBLY__
+#include <linux/compiler.h>
+#include <asm/ptrace.h>
+#include <asm/types.h>
+#ifdef CONFIG_PPC64
+#include <asm/systemcfg.h>
+#endif
+
+#ifdef CONFIG_PPC32
+/* 32-bit platform types */
+/* 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 */
+
+#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 */
+#endif /* CONFIG_PPC32 */
+
+#ifdef CONFIG_PPC64
+/* Platforms supported by PPC64 */
+#define PLATFORM_PSERIES      0x0100
+#define PLATFORM_PSERIES_LPAR 0x0101
+#define PLATFORM_ISERIES_LPAR 0x0201
+#define PLATFORM_LPAR         0x0001
+#define PLATFORM_POWERMAC     0x0400
+#define PLATFORM_MAPLE        0x0500
+#define PLATFORM_CELL         0x1000
+
+/* Compatibility with drivers coming from PPC32 world */
+#define _machine        (systemcfg->platform)
+#define _MACH_Pmac      PLATFORM_POWERMAC
+#endif
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+
+/* Macros for adjusting thread priority (hardware multi-threading) */
+#define HMT_very_low()   asm volatile("or 31,31,31   # very low priority")
+#define HMT_low()        asm volatile("or 1,1,1      # low priority")
+#define HMT_medium_low() asm volatile("or 6,6,6      # medium low priority")
+#define HMT_medium()     asm volatile("or 2,2,2      # medium priority")
+#define HMT_medium_high() asm volatile("or 5,5,5      # medium high priority")
+#define HMT_high()       asm volatile("or 3,3,3      # high priority")
+
+#ifdef __KERNEL__
+
+extern int have_of;
+
+struct task_struct;
+void start_thread(struct pt_regs *regs, unsigned long fdptr, 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;
+
+#ifdef CONFIG_PPC32
+#define TASK_SIZE       (CONFIG_TASK_SIZE)
+
+/* 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)
+#endif
+
+#ifdef CONFIG_PPC64
+/* 64-bit user address space is 44-bits (16TB user VM) */
+#define TASK_SIZE_USER64 (0x0000100000000000UL)
+
+/* 
+ * 32-bit user address space is 4GB - 1 page 
+ * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
+ */
+#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))
+
+#define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
+                TASK_SIZE_USER32 : TASK_SIZE_USER64)
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
+#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4))
+
+#define TASK_UNMAPPED_BASE ((test_thread_flag(TIF_32BIT)) ? \
+                TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )
+#endif
+
+typedef struct {
+        unsigned long seg;
+} mm_segment_t;
+
+struct thread_struct {
+        unsigned long   ksp;            /* Kernel stack pointer */
+#ifdef CONFIG_PPC64
+        unsigned long   ksp_vsid;
+#endif
+        struct pt_regs  *regs;          /* Pointer to saved register state */
+        mm_segment_t    fs;             /* for get_fs() validation */
+#ifdef CONFIG_PPC32
+        void            *pgdir;         /* root of page-table tree */
+        signed long     last_syscall;
+#endif
+#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 */
+        struct {                        /* fpr ... fpscr must be contiguous */
+
+                unsigned int pad;
+                unsigned int val;       /* Floating point status */
+        } fpscr;
+        int             fpexc_mode;     /* floating-point exception mode */
+#ifdef CONFIG_PPC64
+        unsigned long   start_tb;       /* Start purr when proc switched in */
+        unsigned long   accum_tb;       /* Total accumilated purr for process */
+        unsigned long   vdso_base;      /* base of the vDSO library */
+#endif
+        unsigned long   dabr;           /* Data address breakpoint register */
+#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)
+
+
+#ifdef CONFIG_PPC32
+#define INIT_THREAD { \
+        .ksp = INIT_SP, \
+        .fs = KERNEL_DS, \
+        .pgdir = swapper_pg_dir, \
+        .fpexc_mode = MSR_FE0 | MSR_FE1, \
+}
+#else
+#define INIT_THREAD  { \
+        .ksp = INIT_SP, \
+        .regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \
+        .fs = KERNEL_DS, \
+        .fpr = {0}, \
+        .fpscr = { .val = 0, }, \
+        .fpexc_mode = MSR_FE0|MSR_FE1, \
+}
+#endif
+
+/*
+ * 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 long msr_bits)
+{
+        return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
+}
+
+static inline unsigned long __pack_fe01(unsigned int fpmode)
+{
+        return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
+}
+
+#ifdef CONFIG_PPC64
+#define cpu_relax()     do { HMT_low(); HMT_medium(); barrier(); } while (0)
+#else
+#define cpu_relax()     barrier()
+#endif
+
+/*
+ * Prefetch macros.
+ */
+#define ARCH_HAS_PREFETCH
+#define ARCH_HAS_PREFETCHW
+#define ARCH_HAS_SPINLOCK_PREFETCH
+
+static inline void prefetch(const void *x)
+{
+        if (unlikely(!x))
+                return;
+
+        __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
+}
+
+static inline void prefetchw(const void *x)
+{
+        if (unlikely(!x))
+                return;
+
+        __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
+}
+
+#define spin_lock_prefetch(x)   prefetchw(x)
+
+#ifdef CONFIG_PPC64
+#define HAVE_ARCH_PICK_MMAP_LAYOUT
+#endif
+
+#endif /* __KERNEL__ */
+#endif /* __ASSEMBLY__ */
+#endif /* _ASM_POWERPC_PROCESSOR_H */