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, 252 insertions, 0 deletions

diff --git a/include/asm-sparc64/thread_info.h b/include/asm-sparc64/thread_info.h
new file mode 100644
index 000000000000..517caaba1c87
--- /dev/null
+++ b/include/asm-sparc64/thread_info.h
@@ -0,0 +1,252 @@
+/* $Id: thread_info.h,v 1.1 2002/02/10 00:00:58 davem Exp $
+ * thread_info.h: sparc64 low-level thread information
+ *
+ * Copyright (C) 2002  David S. Miller (davem@redhat.com)
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#define NSWINS          7
+
+#define TI_FLAG_BYTE_FAULT_CODE         0
+#define TI_FLAG_FAULT_CODE_SHIFT        56
+#define TI_FLAG_BYTE_WSTATE             1
+#define TI_FLAG_WSTATE_SHIFT            48
+#define TI_FLAG_BYTE_CWP                2
+#define TI_FLAG_CWP_SHIFT               40
+#define TI_FLAG_BYTE_CURRENT_DS         3
+#define TI_FLAG_CURRENT_DS_SHIFT        32
+#define TI_FLAG_BYTE_FPDEPTH            4
+#define TI_FLAG_FPDEPTH_SHIFT           24
+#define TI_FLAG_BYTE_WSAVED             5
+#define TI_FLAG_WSAVED_SHIFT            16
+
+#include <asm/page.h>
+
+#ifndef __ASSEMBLY__
+
+#include <asm/ptrace.h>
+#include <asm/types.h>
+
+struct task_struct;
+struct exec_domain;
+
+struct thread_info {
+        /* D$ line 1 */
+        struct task_struct      *task;
+        unsigned long           flags;
+        __u8                    cpu;
+        __u8                    fpsaved[7];
+        unsigned long           ksp;
+
+        /* D$ line 2 */
+        unsigned long           fault_address;
+        struct pt_regs          *kregs;
+        struct exec_domain      *exec_domain;
+        int                     preempt_count;
+        int                     __pad;
+
+        unsigned long           *utraps;
+
+        struct reg_window       reg_window[NSWINS];
+        unsigned long           rwbuf_stkptrs[NSWINS];
+
+        unsigned long           gsr[7];
+        unsigned long           xfsr[7];
+
+        __u64                   __user *user_cntd0;
+        __u64                   __user *user_cntd1;
+        __u64                   kernel_cntd0, kernel_cntd1;
+        __u64                   pcr_reg;
+
+        __u64                   cee_stuff;
+
+        struct restart_block    restart_block;
+
+        unsigned long           fpregs[0] __attribute__ ((aligned(64)));
+};
+
+#endif /* !(__ASSEMBLY__) */
+
+/* offsets into the thread_info struct for assembly code access */
+#define TI_TASK         0x00000000
+#define TI_FLAGS        0x00000008
+#define TI_FAULT_CODE   (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
+#define TI_WSTATE       (TI_FLAGS + TI_FLAG_BYTE_WSTATE)
+#define TI_CWP          (TI_FLAGS + TI_FLAG_BYTE_CWP)
+#define TI_CURRENT_DS   (TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS)
+#define TI_FPDEPTH      (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
+#define TI_WSAVED       (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
+#define TI_CPU          0x00000010
+#define TI_FPSAVED      0x00000011
+#define TI_KSP          0x00000018
+#define TI_FAULT_ADDR   0x00000020
+#define TI_KREGS        0x00000028
+#define TI_EXEC_DOMAIN  0x00000030
+#define TI_PRE_COUNT    0x00000038
+#define TI_UTRAPS       0x00000040
+#define TI_REG_WINDOW   0x00000048
+#define TI_RWIN_SPTRS   0x000003c8      
+#define TI_GSR          0x00000400
+#define TI_XFSR         0x00000438
+#define TI_USER_CNTD0   0x00000470
+#define TI_USER_CNTD1   0x00000478
+#define TI_KERN_CNTD0   0x00000480
+#define TI_KERN_CNTD1   0x00000488
+#define TI_PCR          0x00000490
+#define TI_CEE_STUFF    0x00000498
+#define TI_RESTART_BLOCK 0x000004a0
+#define TI_FPREGS       0x00000500
+
+/* We embed this in the uppermost byte of thread_info->flags */
+#define FAULT_CODE_WRITE        0x01    /* Write access, implies D-TLB     */
+#define FAULT_CODE_DTLB         0x02    /* Miss happened in D-TLB          */
+#define FAULT_CODE_ITLB         0x04    /* Miss happened in I-TLB          */
+#define FAULT_CODE_WINFIXUP     0x08    /* Miss happened during spill/fill */
+#define FAULT_CODE_BLKCOMMIT    0x10    /* Use blk-commit ASI in copy_page */
+
+#if PAGE_SHIFT == 13
+#define THREAD_SIZE (2*PAGE_SIZE)
+#define THREAD_SHIFT (PAGE_SHIFT + 1)
+#else /* PAGE_SHIFT == 13 */
+#define THREAD_SIZE PAGE_SIZE
+#define THREAD_SHIFT PAGE_SHIFT
+#endif /* PAGE_SHIFT == 13 */
+
+#define PREEMPT_ACTIVE          0x4000000
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#ifndef __ASSEMBLY__
+
+#define INIT_THREAD_INFO(tsk)                           \
+{                                                       \
+        .task           =       &tsk,                   \
+        .flags          = ((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT,   \
+        .exec_domain    =       &default_exec_domain,   \
+        .preempt_count  =       1,                      \
+        .restart_block  = {                             \
+                .fn     =       do_no_restart_syscall,  \
+        },                                              \
+}
+
+#define init_thread_info        (init_thread_union.thread_info)
+#define init_stack              (init_thread_union.stack)
+
+/* how to get the thread information struct from C */
+register struct thread_info *current_thread_info_reg asm("g6");
+#define current_thread_info()   (current_thread_info_reg)
+
+/* thread information allocation */
+#if PAGE_SHIFT == 13
+#define __THREAD_INFO_ORDER     1
+#else /* PAGE_SHIFT == 13 */
+#define __THREAD_INFO_ORDER     0
+#endif /* PAGE_SHIFT == 13 */
+
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(tsk)                                  \
+({                                                              \
+        struct thread_info *ret;                                \
+                                                                \
+        ret = (struct thread_info *)                            \
+          __get_free_pages(GFP_KERNEL, __THREAD_INFO_ORDER);    \
+        if (ret)                                                \
+                memset(ret, 0, PAGE_SIZE<<__THREAD_INFO_ORDER); \
+        ret;                                                    \
+})
+#else
+#define alloc_thread_info(tsk) \
+        ((struct thread_info *)__get_free_pages(GFP_KERNEL, __THREAD_INFO_ORDER))
+#endif
+
+#define free_thread_info(ti) \
+        free_pages((unsigned long)(ti),__THREAD_INFO_ORDER)
+
+#define __thread_flag_byte_ptr(ti)      \
+        ((unsigned char *)(&((ti)->flags)))
+#define __cur_thread_flag_byte_ptr      __thread_flag_byte_ptr(current_thread_info())
+
+#define get_thread_fault_code()         (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
+#define set_thread_fault_code(val)      (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
+#define get_thread_wstate()             (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
+#define set_thread_wstate(val)          (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
+#define get_thread_cwp()                (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
+#define set_thread_cwp(val)             (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
+#define get_thread_current_ds()         (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS])
+#define set_thread_current_ds(val)      (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val))
+#define get_thread_fpdepth()            (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
+#define set_thread_fpdepth(val)         (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
+#define get_thread_wsaved()             (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
+#define set_thread_wsaved(val)          (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
+
+#endif /* !(__ASSEMBLY__) */
+
+/*
+ * Thread information flags, only 16 bits are available as we encode
+ * other values into the upper 6 bytes.
+ *
+ * On trap return we need to test several values:
+ *
+ * user:        need_resched, notify_resume, sigpending, wsaved, perfctr
+ * kernel:      fpdepth
+ *
+ * So to check for work in the kernel case we simply load the fpdepth
+ * byte out of the flags and test it.  For the user case we encode the
+ * lower 3 bytes of flags as follows:
+ *      ----------------------------------------
+ *      | wsaved | flags byte 1 | flags byte 2 |
+ *      ----------------------------------------
+ * This optimizes the user test into:
+ *      ldx             [%g6 + TI_FLAGS], REG1
+ *      sethi           %hi(_TIF_USER_WORK_MASK), REG2
+ *      or              REG2, %lo(_TIF_USER_WORK_MASK), REG2
+ *      andcc           REG1, REG2, %g0
+ *      be,pt           no_work_to_do
+ *       nop
+ */
+#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
+#define TIF_NOTIFY_RESUME       1       /* resumption notification requested */
+#define TIF_SIGPENDING          2       /* signal pending */
+#define TIF_NEED_RESCHED        3       /* rescheduling necessary */
+#define TIF_PERFCTR             4       /* performance counters active */
+#define TIF_UNALIGNED           5       /* allowed to do unaligned accesses */
+#define TIF_NEWSIGNALS          6       /* wants new-style signals */
+#define TIF_32BIT               7       /* 32-bit binary */
+#define TIF_NEWCHILD            8       /* just-spawned child process */
+/* TIF_* value 9 is available */
+#define TIF_POLLING_NRFLAG      10
+#define TIF_SYSCALL_SUCCESS     11
+/* NOTE: Thread flags >= 12 should be ones we have no interest
+ *       in using in assembly, else we can't use the mask as
+ *       an immediate value in instructions such as andcc.
+ */
+#define TIF_ABI_PENDING         12
+#define TIF_MEMDIE              13
+
+#define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
+#define _TIF_PERFCTR            (1<<TIF_PERFCTR)
+#define _TIF_UNALIGNED          (1<<TIF_UNALIGNED)
+#define _TIF_NEWSIGNALS         (1<<TIF_NEWSIGNALS)
+#define _TIF_32BIT              (1<<TIF_32BIT)
+#define _TIF_NEWCHILD           (1<<TIF_NEWCHILD)
+#define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
+#define _TIF_ABI_PENDING        (1<<TIF_ABI_PENDING)
+#define _TIF_SYSCALL_SUCCESS    (1<<TIF_SYSCALL_SUCCESS)
+
+#define _TIF_USER_WORK_MASK     ((0xff << TI_FLAG_WSAVED_SHIFT) | \
+                                 (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
+                                  _TIF_NEED_RESCHED | _TIF_PERFCTR))
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_THREAD_INFO_H */