powerpc: Define 32/64 bit asm macros and use them in fpu.S

[deliverable/linux.git] / arch / powerpc / kernel / fpu.S

diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S
index 665d7d34304cd0118c62c18963600ddbb8070118..04e95e810b21f3b5557904749f44cf9f25e1a2eb 100644 (file)
--- a/arch/powerpc/kernel/fpu.S
+++ b/arch/powerpc/kernel/fpu.S
@@ -27,13 +27,9 @@
  * Load up this task's FP registers from its thread_struct,
  * enable the FPU for the current task and return to the task.
  */
-       .globl  load_up_fpu
-load_up_fpu:
+_GLOBAL(load_up_fpu)
        mfmsr   r5
        ori     r5,r5,MSR_FP
-#ifdef CONFIG_PPC64BRIDGE
-       clrldi  r5,r5,1                 /* turn off 64-bit mode */
-#endif /* CONFIG_PPC64BRIDGE */
        SYNC
        MTMSRD(r5)                      /* enable use of fpu now */
        isync
@@ -43,67 +39,57 @@ load_up_fpu:
  * to another.  Instead we call giveup_fpu in switch_to.
  */
 #ifndef CONFIG_SMP
-       tophys(r6,0)                    /* get __pa constant */
-       addis   r3,r6,last_task_used_math@ha
-       lwz     r4,last_task_used_math@l(r3)
-       cmpwi   0,r4,0
+       LOADBASE(r3, last_task_used_math)
+       tophys(r3,r3)
+       LDL     r4,OFF(last_task_used_math)(r3)
+       CMPI    0,r4,0
        beq     1f
-       add     r4,r4,r6
+       tophys(r4,r4)
        addi    r4,r4,THREAD            /* want last_task_used_math->thread */
        SAVE_32FPRS(0, r4)
        mffs    fr0
        stfd    fr0,THREAD_FPSCR-4(r4)
-       lwz     r5,PT_REGS(r4)
-       add     r5,r5,r6
-       lwz     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
+       LDL     r5,PT_REGS(r4)
+       tophys(r5,r5)
+       LDL     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
        li      r10,MSR_FP|MSR_FE0|MSR_FE1
        andc    r4,r4,r10               /* disable FP for previous task */
-       stw     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
+       STL     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
 1:
 #endif /* CONFIG_SMP */
        /* enable use of FP after return */
+#ifdef CONFIG_PPC32
        mfspr   r5,SPRN_SPRG3           /* current task's THREAD (phys) */
        lwz     r4,THREAD_FPEXC_MODE(r5)
        ori     r9,r9,MSR_FP            /* enable FP for current */
        or      r9,r9,r4
+#else
+       ld      r4,PACACURRENT(r13)
+       addi    r5,r4,THREAD            /* Get THREAD */
+       ld      r4,THREAD_FPEXC_MODE(r5)
+       ori     r12,r12,MSR_FP
+       or      r12,r12,r4
+       std     r12,_MSR(r1)
+#endif
        lfd     fr0,THREAD_FPSCR-4(r5)
        mtfsf   0xff,fr0
        REST_32FPRS(0, r5)
 #ifndef CONFIG_SMP
        subi    r4,r5,THREAD
-       sub     r4,r4,r6
-       stw     r4,last_task_used_math@l(r3)
+       tovirt(r4,r4)
+       STL     r4,OFF(last_task_used_math)(r3)
 #endif /* CONFIG_SMP */
        /* restore registers and return */
        /* we haven't used ctr or xer or lr */
        b       fast_exception_return
 
-/*
- * FP unavailable trap from kernel - print a message, but let
- * the task use FP in the kernel until it returns to user mode.
- */
-       .globl  KernelFP
-KernelFP:
-       lwz     r3,_MSR(r1)
-       ori     r3,r3,MSR_FP
-       stw     r3,_MSR(r1)             /* enable use of FP after return */
-       lis     r3,86f@h
-       ori     r3,r3,86f@l
-       mr      r4,r2                   /* current */
-       lwz     r5,_NIP(r1)
-       bl      printk
-       b       ret_from_except
-86:    .string "floating point used in kernel (task=%p, pc=%x)\n"
-       .align  4,0
-
 /*
  * giveup_fpu(tsk)
  * Disable FP for the task given as the argument,
  * and save the floating-point registers in its thread_struct.
  * Enables the FPU for use in the kernel on return.
  */
-       .globl  giveup_fpu
-giveup_fpu:
+_GLOBAL(giveup_fpu)
        mfmsr   r5
        ori     r5,r5,MSR_FP
        SYNC_601
@@ -111,23 +97,23 @@ giveup_fpu:
        MTMSRD(r5)                      /* enable use of fpu now */
        SYNC_601
        isync
-       cmpwi   0,r3,0
+       CMPI    0,r3,0
        beqlr-                          /* if no previous owner, done */
        addi    r3,r3,THREAD            /* want THREAD of task */
-       lwz     r5,PT_REGS(r3)
-       cmpwi   0,r5,0
+       LDL     r5,PT_REGS(r3)
+       CMPI    0,r5,0
        SAVE_32FPRS(0, r3)
        mffs    fr0
        stfd    fr0,THREAD_FPSCR-4(r3)
        beq     1f
-       lwz     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
+       LDL     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
        li      r3,MSR_FP|MSR_FE0|MSR_FE1
        andc    r4,r4,r3                /* disable FP for previous task */
-       stw     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
+       STL     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
 1:
 #ifndef CONFIG_SMP
        li      r5,0
-       lis     r4,last_task_used_math@ha
-       stw     r5,last_task_used_math@l(r4)
+       LOADBASE(r4,last_task_used_math)
+       STL     r5,OFF(last_task_used_math)(r4)
 #endif /* CONFIG_SMP */
        blr