Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 304 insertions, 0 deletions

diff --git a/arch/parisc/kernel/real2.S b/arch/parisc/kernel/real2.S
new file mode 100644
index 000000000000..8dd5defb7316
--- /dev/null
+++ b/arch/parisc/kernel/real2.S
@@ -0,0 +1,304 @@
+/*
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2000 Hewlett Packard (Paul Bame bame@puffin.external.hp.com)
+ *
+ */
+#include <asm/assembly.h>
+#include <asm/psw.h>
+
+        .section        .bss
+        .export real_stack
+        .export real32_stack
+        .export real64_stack
+        .align  64
+real_stack:
+real32_stack:
+real64_stack:
+        .block  8192
+
+#ifdef __LP64__
+#  define REG_SZ 8
+#else
+#  define REG_SZ 4
+#endif
+
+#define N_SAVED_REGS 9
+
+save_cr_space:
+        .block  REG_SZ * N_SAVED_REGS
+save_cr_end:
+
+
+/************************ 32-bit real-mode calls ***********************/
+/* This can be called in both narrow and wide kernels */
+
+        .text
+
+        .export real32_call_asm
+
+        /* unsigned long real32_call_asm(unsigned int *sp,
+         *              unsigned int *arg0p,
+         *              unsigned int iodc_fn)
+         *      sp is value of stack pointer to adopt before calling PDC (virt)
+         *      arg0p points to where saved arg values may be found
+         *      iodc_fn is the IODC function to call
+         */
+
+real32_call_asm:
+        STREG   %rp, -RP_OFFSET(%sp)    /* save RP */
+#ifdef __LP64__
+        callee_save
+        ldo     2*REG_SZ(%sp), %sp      /* room for a couple more saves */
+        STREG   %r27, -1*REG_SZ(%sp)
+        STREG   %r29, -2*REG_SZ(%sp)
+#endif
+        STREG   %sp, -REG_SZ(%arg0)     /* save SP on real-mode stack */
+        copy    %arg0, %sp              /* adopt the real-mode SP */
+
+        /* save iodc_fn */
+        copy    %arg2, %r31
+
+        /* load up the arg registers from the saved arg area */
+        /* 32-bit calling convention passes first 4 args in registers */
+        ldw     0(%arg1), %arg0         /* note overwriting arg0 */
+        ldw     -8(%arg1), %arg2
+        ldw     -12(%arg1), %arg3
+        ldw     -4(%arg1), %arg1        /* obviously must do this one last! */
+
+        tophys_r1  %sp
+
+        b,l     rfi_virt2real,%r2
+        nop
+
+        b,l     save_control_regs,%r2           /* modifies r1, r2, r28 */
+        nop
+
+#ifdef __LP64__
+        rsm     PSW_SM_W, %r0           /* go narrow */
+#endif
+
+        load32  PA(ric_ret), %r2
+        bv      0(%r31)
+        nop
+ric_ret:
+#ifdef __LP64__
+        ssm     PSW_SM_W, %r0           /* go wide */
+#endif
+        /* restore CRs before going virtual in case we page fault */
+        b,l     restore_control_regs, %r2       /* modifies r1, r2, r26 */
+        nop
+
+        b,l     rfi_real2virt,%r2
+        nop
+
+        tovirt_r1 %sp
+        LDREG   -REG_SZ(%sp), %sp       /* restore SP */
+#ifdef __LP64__
+        LDREG   -1*REG_SZ(%sp), %r27
+        LDREG   -2*REG_SZ(%sp), %r29
+        ldo     -2*REG_SZ(%sp), %sp
+        callee_rest
+#endif
+        LDREG   -RP_OFFSET(%sp), %rp    /* restore RP */
+        bv      0(%rp)
+        nop
+
+
+#  define PUSH_CR(r, where) mfctl r, %r1 ! STREG,ma %r1, REG_SZ(where)
+#  define POP_CR(r, where) LDREG,mb -REG_SZ(where), %r1 ! mtctl %r1, r
+
+        .text
+save_control_regs:
+        load32  PA(save_cr_space), %r28
+        PUSH_CR(%cr24, %r28)
+        PUSH_CR(%cr25, %r28)
+        PUSH_CR(%cr26, %r28)
+        PUSH_CR(%cr27, %r28)
+        PUSH_CR(%cr28, %r28)
+        PUSH_CR(%cr29, %r28)
+        PUSH_CR(%cr30, %r28)
+        PUSH_CR(%cr31, %r28)
+        PUSH_CR(%cr15, %r28)
+        bv 0(%r2)
+        nop
+
+restore_control_regs:
+        load32  PA(save_cr_end), %r26
+        POP_CR(%cr15, %r26)
+        POP_CR(%cr31, %r26)
+        POP_CR(%cr30, %r26)
+        POP_CR(%cr29, %r26)
+        POP_CR(%cr28, %r26)
+        POP_CR(%cr27, %r26)
+        POP_CR(%cr26, %r26)
+        POP_CR(%cr25, %r26)
+        POP_CR(%cr24, %r26)
+        bv 0(%r2)
+        nop
+
+/* rfi_virt2real() and rfi_real2virt() could perhaps be adapted for
+ * more general-purpose use by the several places which need RFIs
+ */
+        .align 128
+        .text
+rfi_virt2real:
+        /* switch to real mode... */
+        ssm             0,0             /* See "relied upon translation" */
+        nop                             /* PA 2.0 Arch. F-5 */
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        
+        rsm             (PSW_SM_Q|PSW_SM_I),%r0  /* disable Q & I bits to load iia queue */
+        mtctl           %r0, %cr17      /* Clear IIASQ tail */
+        mtctl           %r0, %cr17      /* Clear IIASQ head */
+        load32          PA(rfi_v2r_1), %r1
+        mtctl           %r1, %cr18      /* IIAOQ head */
+        ldo             4(%r1), %r1
+        mtctl           %r1, %cr18      /* IIAOQ tail */
+        load32          REAL_MODE_PSW, %r1
+        mtctl           %r1, %cr22
+        rfi
+        
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+rfi_v2r_1:
+        tophys_r1 %r2
+        bv      0(%r2)
+        nop
+
+        .text
+        .align 128
+rfi_real2virt:
+        ssm             0,0             /* See "relied upon translation" */
+        nop                             /* PA 2.0 Arch. F-5 */
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        
+        rsm             PSW_SM_Q,%r0    /* disable Q bit to load iia queue */
+        mtctl           %r0, %cr17      /* Clear IIASQ tail */
+        mtctl           %r0, %cr17      /* Clear IIASQ head */
+        load32          (rfi_r2v_1), %r1
+        mtctl           %r1, %cr18      /* IIAOQ head */
+        ldo             4(%r1), %r1
+        mtctl           %r1, %cr18      /* IIAOQ tail */
+        load32          KERNEL_PSW, %r1
+        mtctl           %r1, %cr22
+        rfi
+        
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+rfi_r2v_1:
+        tovirt_r1 %r2
+        bv      0(%r2)
+        nop
+
+#ifdef __LP64__
+
+/************************ 64-bit real-mode calls ***********************/
+/* This is only usable in wide kernels right now and will probably stay so */
+        .text
+        .export real64_call_asm
+        /* unsigned long real64_call_asm(unsigned long *sp,
+         *              unsigned long *arg0p,
+         *              unsigned long fn)
+         *      sp is value of stack pointer to adopt before calling PDC (virt)
+         *      arg0p points to where saved arg values may be found
+         *      iodc_fn is the IODC function to call
+         */
+real64_call_asm:
+        std     %rp, -0x10(%sp)         /* save RP */
+        std     %sp, -8(%arg0)          /* save SP on real-mode stack */
+        copy    %arg0, %sp              /* adopt the real-mode SP */
+
+        /* save fn */
+        copy    %arg2, %r31
+
+        /* set up the new ap */
+        ldo     64(%arg1), %r29
+
+        /* load up the arg registers from the saved arg area */
+        /* 32-bit calling convention passes first 4 args in registers */
+        ldd     0*REG_SZ(%arg1), %arg0          /* note overwriting arg0 */
+        ldd     2*REG_SZ(%arg1), %arg2
+        ldd     3*REG_SZ(%arg1), %arg3
+        ldd     4*REG_SZ(%arg1), %r22
+        ldd     5*REG_SZ(%arg1), %r21
+        ldd     6*REG_SZ(%arg1), %r20
+        ldd     7*REG_SZ(%arg1), %r19
+        ldd     1*REG_SZ(%arg1), %arg1          /* do this one last! */
+
+        tophys_r1 %sp
+
+        b,l     rfi_virt2real,%r2
+        nop
+
+        b,l     save_control_regs,%r2           /* modifies r1, r2, r28 */
+        nop
+
+        load32  PA(r64_ret), %r2
+        bv      0(%r31)
+        nop
+r64_ret:
+        /* restore CRs before going virtual in case we page fault */
+        b,l     restore_control_regs, %r2       /* modifies r1, r2, r26 */
+        nop
+
+        b,l     rfi_real2virt,%r2
+        nop
+
+        tovirt_r1 %sp
+        ldd     -8(%sp), %sp            /* restore SP */
+        ldd     -0x10(%sp), %rp         /* restore RP */
+        bv      0(%rp)
+        nop
+
+#endif
+
+        .export pc_in_user_space
+        .text
+        /* Doesn't belong here but I couldn't find a nicer spot. */
+        /* Should never get called, only used by profile stuff in time.c */
+pc_in_user_space:
+        bv,n    0(%rp)
+        nop
+
+
+        .export __canonicalize_funcptr_for_compare
+        .text
+        /* http://lists.parisc-linux.org/hypermail/parisc-linux/10916.html
+        **      GCC 3.3 and later has a new function in libgcc.a for
+        **      comparing function pointers.
+        */
+__canonicalize_funcptr_for_compare:
+#ifdef __LP64__
+        bve (%r2)
+#else
+        bv %r0(%r2)
+#endif
+        copy %r26,%r28