Merge branch 'forlinus' of git://parisc-linux.org/home/kyle/git/parisc-2.6

1 files changed, 85 insertions, 103 deletions

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index be0f07f2fa58..c7e66ee5b083 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -30,14 +30,14 @@
  *  - save registers to kernel stack and handle in assembly or C */
 
 
+#include <asm/psw.h>
 #include <asm/assembly.h>       /* for LDREG/STREG defines */
 #include <asm/pgtable.h>
-#include <asm/psw.h>
 #include <asm/signal.h>
 #include <asm/unistd.h>
 #include <asm/thread_info.h>
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
 #define CMPIB           cmpib,*
 #define CMPB            cmpb,*
 #define COND(x)         *x
@@ -67,19 +67,22 @@
 
         /* Switch to virtual mapping, trashing only %r1 */
         .macro  virt_map
-        rsm     PSW_SM_Q,%r0
-        tovirt_r1 %r29
-        mfsp    %sr7, %r1
-        or,=    %r0,%r1,%r0 /* Only save sr7 in sr3 if sr7 != 0 */
-        mtsp    %r1, %sr3
+        /* pcxt_ssm_bug */
+        rsm     PSW_SM_I, %r0   /* barrier for "Relied upon Translation */
         mtsp    %r0, %sr4
         mtsp    %r0, %sr5
+        mfsp    %sr7, %r1
+        or,=    %r0,%r1,%r0     /* Only save sr7 in sr3 if sr7 != 0 */
+        mtsp    %r1, %sr3
+        tovirt_r1 %r29
+        load32  KERNEL_PSW, %r1
+
+        rsm     PSW_SM_QUIET,%r0        /* second "heavy weight" ctl op */
         mtsp    %r0, %sr6
         mtsp    %r0, %sr7
-        load32  KERNEL_PSW, %r1
-        mtctl   %r1, %cr22
         mtctl   %r0, %cr17      /* Clear IIASQ tail */
         mtctl   %r0, %cr17      /* Clear IIASQ head */
+        mtctl   %r1, %ipsw
         load32  4f, %r1
         mtctl   %r1, %cr18      /* Set IIAOQ tail */
         ldo     4(%r1), %r1
@@ -214,7 +217,7 @@
         va  = r8        /* virtual address for which the trap occured */
         spc = r24       /* space for which the trap occured */
 
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
 
         /*
          * itlb miss interruption handler (parisc 1.1 - 32 bit)
@@ -236,7 +239,7 @@
 
         .macro  itlb_20 code
         mfctl   %pcsq, spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         b       itlb_miss_20w
 #else
         b       itlb_miss_20
@@ -246,7 +249,7 @@
         .align          32
         .endm
         
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
         /*
          * naitlb miss interruption handler (parisc 1.1 - 32 bit)
          *
@@ -283,7 +286,7 @@
         .macro  naitlb_20 code
 
         mfctl   %isr,spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         b       itlb_miss_20w
 #else
         b       itlb_miss_20
@@ -296,7 +299,7 @@
         .align          32
         .endm
         
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
         /*
          * dtlb miss interruption handler (parisc 1.1 - 32 bit)
          */
@@ -318,7 +321,7 @@
         .macro  dtlb_20 code
 
         mfctl   %isr, spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         b       dtlb_miss_20w
 #else
         b       dtlb_miss_20
@@ -328,7 +331,7 @@
         .align          32
         .endm
         
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
         /* nadtlb miss interruption handler (parisc 1.1 - 32 bit) */
 
         .macro  nadtlb_11 code
@@ -346,7 +349,7 @@
         .macro  nadtlb_20 code
 
         mfctl   %isr,spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         b       nadtlb_miss_20w
 #else
         b       nadtlb_miss_20
@@ -356,7 +359,7 @@
         .align          32
         .endm
         
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
         /*
          * dirty bit trap interruption handler (parisc 1.1 - 32 bit)
          */
@@ -378,7 +381,7 @@
         .macro  dbit_20 code
 
         mfctl   %isr,spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         b       dbit_trap_20w
 #else
         b       dbit_trap_20
@@ -391,7 +394,7 @@
         /* The following are simple 32 vs 64 bit instruction
          * abstractions for the macros */
         .macro          EXTR    reg1,start,length,reg2
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         extrd,u         \reg1,32+\start,\length,\reg2
 #else
         extrw,u         \reg1,\start,\length,\reg2
@@ -399,7 +402,7 @@
         .endm
 
         .macro          DEP     reg1,start,length,reg2
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         depd            \reg1,32+\start,\length,\reg2
 #else
         depw            \reg1,\start,\length,\reg2
@@ -407,7 +410,7 @@
         .endm
 
         .macro          DEPI    val,start,length,reg
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         depdi           \val,32+\start,\length,\reg
 #else
         depwi           \val,\start,\length,\reg
@@ -418,7 +421,7 @@
          * fault.  We have to extract this and place it in the va,
          * zeroing the corresponding bits in the space register */
         .macro          space_adjust    spc,va,tmp
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         extrd,u         \spc,63,SPACEID_SHIFT,\tmp
         depd            %r0,63,SPACEID_SHIFT,\spc
         depd            \tmp,31,SPACEID_SHIFT,\va
@@ -476,7 +479,7 @@
         bb,>=,n         \pmd,_PxD_PRESENT_BIT,\fault
         DEP             %r0,31,PxD_FLAG_SHIFT,\pmd /* clear flags */
         copy            \pmd,%r9
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         shld            %r9,PxD_VALUE_SHIFT,\pmd
 #else
         shlw            %r9,PxD_VALUE_SHIFT,\pmd
@@ -607,7 +610,7 @@
         .macro          do_alias        spc,tmp,tmp1,va,pte,prot,fault
         cmpib,COND(<>),n 0,\spc,\fault
         ldil            L%(TMPALIAS_MAP_START),\tmp
-#if defined(__LP64__) && (TMPALIAS_MAP_START >= 0x80000000)
+#if defined(CONFIG_64BIT) && (TMPALIAS_MAP_START >= 0x80000000)
         /* on LP64, ldi will sign extend into the upper 32 bits,
          * which is behaviour we don't want */
         depdi           0,31,32,\tmp
@@ -621,7 +624,7 @@
          * OK, it is in the temp alias region, check whether "from" or "to".
          * Check "subtle" note in pacache.S re: r23/r26.
          */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         extrd,u,*=      \va,41,1,%r0
 #else
         extrw,u,=       \va,9,1,%r0
@@ -688,7 +691,7 @@ fault_vector_20:
         def             30
         def             31
 
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
 
         .export fault_vector_11
         
@@ -761,7 +764,7 @@ __kernel_thread:
 
         copy    %r30, %r1
         ldo     PT_SZ_ALGN(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         /* Yo, function pointers in wide mode are little structs... -PB */
         ldd     24(%r26), %r2
         STREG   %r2, PT_GR27(%r1)       /* Store childs %dp */
@@ -777,7 +780,7 @@ __kernel_thread:
         or      %r26, %r24, %r26      /* will have kernel mappings.      */
         ldi     1, %r25                 /* stack_start, signals kernel thread */
         stw     %r0, -52(%r30)          /* user_tid */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
 #endif
         BL      do_fork, %r2
@@ -806,7 +809,7 @@ ret_from_kernel_thread:
 
         LDREG   TI_TASK-THREAD_SZ_ALGN(%r30), %r1
         LDREG   TASK_PT_GR25(%r1), %r26
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         LDREG   TASK_PT_GR27(%r1), %r27
         LDREG   TASK_PT_GR22(%r1), %r22
 #endif
@@ -814,11 +817,16 @@ ret_from_kernel_thread:
         ble     0(%sr7, %r1)
         copy    %r31, %r2
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
         loadgp                          /* Thread could have been in a module */
 #endif
+#ifndef CONFIG_64BIT
         b       sys_exit
+#else
+        load32  sys_exit, %r1
+        bv      %r0(%r1)
+#endif
         ldi     0, %r26
 
         .import sys_execve, code
@@ -830,7 +838,7 @@ __execve:
         STREG   %r26, PT_GR26(%r16)
         STREG   %r25, PT_GR25(%r16)
         STREG   %r24, PT_GR24(%r16)
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
 #endif
         BL      sys_execve, %r2
@@ -855,6 +863,7 @@ __execve:
 _switch_to:
         STREG    %r2, -RP_OFFSET(%r30)
 
+        callee_save_float
         callee_save
 
         load32  _switch_to_ret, %r2
@@ -871,6 +880,7 @@ _switch_to:
 _switch_to_ret:
         mtctl   %r0, %cr0               /* Needed for single stepping */
         callee_rest
+        callee_rest_float
 
         LDREG   -RP_OFFSET(%r30), %r2
         bv      %r0(%r2)
@@ -888,9 +898,6 @@ _switch_to_ret:
          * this way, then we will need to copy %sr3 in to PT_SR[3..7], and
          * adjust IASQ[0..1].
          *
-         * Note that the following code uses a "relied upon translation".
-         * See the parisc ACD for details. The ssm is necessary due to a
-         * PCXT bug.
          */
 
         .align 4096
@@ -911,7 +918,7 @@ syscall_exit_rfi:
         STREG   %r19,PT_IAOQ1(%r16)
         LDREG   PT_PSW(%r16),%r19
         load32  USER_PSW_MASK,%r1
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         load32  USER_PSW_HI_MASK,%r20
         depd    %r20,31,32,%r1
 #endif
@@ -955,7 +962,7 @@ intr_return:
         /* shift left ____cacheline_aligned (aka L1_CACHE_BYTES) amount
         ** irq_stat[] is defined using ____cacheline_aligned.
         */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         shld    %r1, 6, %r20
 #else
         shlw    %r1, 5, %r20
@@ -963,9 +970,6 @@ intr_return:
         add     %r19,%r20,%r19  /* now have &irq_stat[smp_processor_id()] */
 #endif /* CONFIG_SMP */
 
-        LDREG   IRQSTAT_SIRQ_PEND(%r19),%r20    /* hardirq.h: unsigned long */
-        cmpib,<>,n 0,%r20,intr_do_softirq /* forward */
-
 intr_check_resched:
 
         /* check for reschedule */
@@ -985,24 +989,19 @@ intr_restore:
         rest_fp         %r1
         rest_general    %r29
 
-        /* Create a "relied upon translation" PA 2.0 Arch. F-5 */
-        ssm             0,%r0
-        nop
-        nop
-        nop
-        nop
-        nop
-        nop
-        nop
+        /* inverse of virt_map */
+        pcxt_ssm_bug
+        rsm             PSW_SM_QUIET,%r0        /* prepare for rfi */
         tophys_r1       %r29
-        rsm             (PSW_SM_Q|PSW_SM_P|PSW_SM_D|PSW_SM_I),%r0
 
         /* Restore space id's and special cr's from PT_REGS
-         * structure pointed to by r29 */
+         * structure pointed to by r29
+         */
         rest_specials   %r29
 
-        /* Important: Note that rest_stack restores r29
-         * last (we are using it)! It also restores r1 and r30. */
+        /* IMPORTANT: rest_stack restores r29 last (we are using it)!
+         * It also restores r1 and r30.
+         */
         rest_stack
 
         rfi
@@ -1015,17 +1014,6 @@ intr_restore:
         nop
         nop
 
-        .import do_softirq,code
-intr_do_softirq:
-        bl      do_softirq,%r2
-#ifdef __LP64__
-        ldo     -16(%r30),%r29          /* Reference param save area */
-#else
-        nop
-#endif
-        b       intr_check_resched
-        nop
-
         .import schedule,code
 intr_do_resched:
         /* Only do reschedule if we are returning to user space */
@@ -1036,12 +1024,17 @@ intr_do_resched:
         CMPIB= 0,%r20,intr_restore /* backward */
         nop
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
 #endif
 
         ldil    L%intr_check_sig, %r2
+#ifndef CONFIG_64BIT
         b       schedule
+#else
+        load32  schedule, %r20
+        bv      %r0(%r20)
+#endif
         ldo     R%intr_check_sig(%r2), %r2
 
 
@@ -1064,7 +1057,7 @@ intr_do_signal:
 
         copy    %r0, %r24                       /* unsigned long in_syscall */
         copy    %r16, %r25                      /* struct pt_regs *regs */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29                  /* Reference param save area */
 #endif
 
@@ -1088,7 +1081,7 @@ intr_extint:
         mfctl   %cr31,%r1
         copy    %r30,%r17
         /* FIXME! depi below has hardcoded idea of interrupt stack size (32k)*/
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         depdi   0,63,15,%r17
 #else
         depi    0,31,15,%r17
@@ -1115,7 +1108,7 @@ intr_extint:
 
         ldil    L%intr_return, %r2
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29  /* Reference param save area */
 #endif
 
@@ -1153,15 +1146,17 @@ intr_save:
 
         CMPIB=,n        6,%r26,skip_save_ior
 
-        /* save_specials left ipsw value in r8 for us to test */
 
         mfctl           %cr20, %r16 /* isr */
+        nop             /* serialize mfctl on PA 2.0 to avoid 4 cycle penalty */
         mfctl           %cr21, %r17 /* ior */
 
-#ifdef __LP64__
+
+#ifdef CONFIG_64BIT
         /*
          * If the interrupted code was running with W bit off (32 bit),
          * clear the b bits (bits 0 & 1) in the ior.
+         * save_specials left ipsw value in r8 for us to test.
          */
         extrd,u,*<>     %r8,PSW_W_BIT,1,%r0
         depdi           0,1,2,%r17
@@ -1192,7 +1187,7 @@ skip_save_ior:
         loadgp
 
         copy            %r29, %r25      /* arg1 is pt_regs */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo             -16(%r30),%r29  /* Reference param save area */
 #endif
 
@@ -1230,7 +1225,7 @@ skip_save_ior:
         spc  = r24      /* space for which the trap occured */
         ptp = r25       /* page directory/page table pointer */
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
 
 dtlb_miss_20w:
         space_adjust    spc,va,t0
@@ -1487,10 +1482,10 @@ nadtlb_emulate:
         add,l           %r1,%r24,%r1           /* doesn't affect c/b bits */
 
 nadtlb_nullify:
-        mfctl           %cr22,%r8              /* Get ipsw */
+        mfctl           %ipsw,%r8
         ldil            L%PSW_N,%r9
         or              %r8,%r9,%r8            /* Set PSW_N */
-        mtctl           %r8,%cr22
+        mtctl           %r8,%ipsw
 
         rfir
         nop
@@ -1521,7 +1516,7 @@ nadtlb_probe_check:
         nop
 
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
 itlb_miss_20w:
 
         /*
@@ -1588,7 +1583,7 @@ itlb_miss_20:
 
 #endif
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
 
 dbit_trap_20w:
         space_adjust    spc,va,t0
@@ -1797,7 +1792,7 @@ sys_fork_wrapper:
 
         STREG   %r2,-RP_OFFSET(%r30)
         ldo     FRAME_SIZE(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
 #endif
 
@@ -1847,7 +1842,7 @@ sys_clone_wrapper:
 
         STREG   %r2,-RP_OFFSET(%r30)
         ldo     FRAME_SIZE(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
 #endif
 
@@ -1869,7 +1864,7 @@ sys_vfork_wrapper:
 
         STREG   %r2,-RP_OFFSET(%r30)
         ldo     FRAME_SIZE(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
 #endif
 
@@ -1897,10 +1892,10 @@ sys_vfork_wrapper:
 
         STREG %r2,-RP_OFFSET(%r30)
         ldo FRAME_SIZE(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
 #endif
-        bl \execve,%r2
+        BL \execve,%r2
         copy %r1,%arg0
 
         ldo -FRAME_SIZE(%r30),%r30
@@ -1923,7 +1918,7 @@ error_\execve:
 sys_execve_wrapper:
         execve_wrapper sys_execve
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         .export sys32_execve_wrapper
         .import sys32_execve
 
@@ -1937,7 +1932,7 @@ sys_rt_sigreturn_wrapper:
         ldo     TASK_REGS(%r26),%r26    /* get pt regs */
         /* Don't save regs, we are going to restore them from sigcontext. */
         STREG   %r2, -RP_OFFSET(%r30)
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     FRAME_SIZE(%r30), %r30
         BL      sys_rt_sigreturn,%r2
         ldo     -16(%r30),%r29          /* Reference param save area */
@@ -1968,7 +1963,7 @@ sys_sigaltstack_wrapper:
         ldo     TASK_REGS(%r1),%r24     /* get pt regs */
         LDREG   TASK_PT_GR30(%r24),%r24
         STREG   %r2, -RP_OFFSET(%r30)
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     FRAME_SIZE(%r30), %r30
         b,l     do_sigaltstack,%r2
         ldo     -16(%r30),%r29          /* Reference param save area */
@@ -1982,7 +1977,7 @@ sys_sigaltstack_wrapper:
         bv      %r0(%r2)
         nop
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         .export sys32_sigaltstack_wrapper
 sys32_sigaltstack_wrapper:
         /* Get the user stack pointer */
@@ -2006,7 +2001,7 @@ sys_rt_sigsuspend_wrapper:
         reg_save %r24
 
         STREG   %r2, -RP_OFFSET(%r30)
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     FRAME_SIZE(%r30), %r30
         b,l     sys_rt_sigsuspend,%r2
         ldo     -16(%r30),%r29          /* Reference param save area */
@@ -2079,7 +2074,7 @@ syscall_check_bh:
         ldw     TI_CPU-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26 /* cpu # */
 
         /* shift left ____cacheline_aligned (aka L1_CACHE_BYTES) bits */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         shld    %r26, 6, %r20
 #else
         shlw    %r26, 5, %r20
@@ -2087,9 +2082,6 @@ syscall_check_bh:
         add     %r19,%r20,%r19  /* now have &irq_stat[smp_processor_id()] */
 #endif /* CONFIG_SMP */
 
-        LDREG   IRQSTAT_SIRQ_PEND(%r19),%r20    /* hardirq.h: unsigned long */
-        cmpib,<>,n 0,%r20,syscall_do_softirq /* forward */
-
 syscall_check_resched:
 
         /* check for reschedule */
@@ -2144,7 +2136,7 @@ syscall_restore:
 
         depi    3,31,2,%r31                        /* ensure return to user mode. */
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         /* decide whether to reset the wide mode bit
          *
          * For a syscall, the W bit is stored in the lowest bit
@@ -2227,20 +2219,10 @@ pt_regs_ok:
         b       intr_restore
         nop
 
-        .import do_softirq,code
-syscall_do_softirq:
-        bl      do_softirq,%r2
-        nop
-        /* NOTE: We enable I-bit incase we schedule later,
-         * and we might be going back to userspace if we were
-         * traced. */
-        b       syscall_check_resched
-        ssm     PSW_SM_I, %r0  /* do_softirq returns with I bit off */
-
         .import schedule,code
 syscall_do_resched:
         BL      schedule,%r2
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29          /* Reference param save area */
 #else
         nop
@@ -2260,7 +2242,7 @@ syscall_do_signal:
 
         ldi     1, %r24                         /* unsigned long in_syscall */
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29                  /* Reference param save area */
 #endif
         BL      do_signal,%r2