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, 182 insertions, 0 deletions

diff --git a/include/asm-m32r/thread_info.h b/include/asm-m32r/thread_info.h
new file mode 100644
index 000000000000..9f3a0fcf6e2b
--- /dev/null
+++ b/include/asm-m32r/thread_info.h
@@ -0,0 +1,182 @@
+#ifndef _ASM_M32R_THREAD_INFO_H
+#define _ASM_M32R_THREAD_INFO_H
+
+/* thread_info.h: m32r low-level thread information
+ *
+ * Copyright (C) 2002  David Howells (dhowells@redhat.com)
+ * - Incorporating suggestions made by Linus Torvalds and Dave Miller
+ * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
+ */
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+#include <asm/processor.h>
+#endif
+
+/*
+ * low level task data that entry.S needs immediate access to
+ * - this struct should fit entirely inside of one cache line
+ * - this struct shares the supervisor stack pages
+ * - if the contents of this structure are changed, the assembly constants must also be changed
+ */
+#ifndef __ASSEMBLY__
+
+struct thread_info {
+        struct task_struct      *task;          /* main task structure */
+        struct exec_domain      *exec_domain;   /* execution domain */
+        unsigned long           flags;          /* low level flags */
+        unsigned long           status;         /* thread-synchronous flags */
+        __u32                   cpu;            /* current CPU */
+        __s32                   preempt_count; /* 0 => preemptable, <0 => BUG */
+
+        mm_segment_t            addr_limit;     /* thread address space:
+                                                   0-0xBFFFFFFF for user-thread
+                                                   0-0xFFFFFFFF for kernel-thread
+                                                */
+        struct restart_block    restart_block;
+
+        __u8                    supervisor_stack[0];
+};
+
+#else /* !__ASSEMBLY__ */
+
+/* offsets into the thread_info struct for assembly code access */
+#define TI_TASK         0x00000000
+#define TI_EXEC_DOMAIN  0x00000004
+#define TI_FLAGS        0x00000008
+#define TI_STATUS       0x0000000C
+#define TI_CPU          0x00000010
+#define TI_PRE_COUNT    0x00000014
+#define TI_ADDR_LIMIT   0x00000018
+#define TI_RESTART_BLOCK 0x000001C
+
+#endif
+
+#define PREEMPT_ACTIVE          0x10000000
+
+/*
+ * 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,                 \
+        .exec_domain    = &default_exec_domain, \
+        .flags          = 0,                    \
+        .cpu            = 0,                    \
+        .preempt_count  = 1,                    \
+        .addr_limit     = KERNEL_DS,            \
+        .restart_block = {                      \
+                .fn = do_no_restart_syscall,    \
+        },                                      \
+}
+
+#define init_thread_info        (init_thread_union.thread_info)
+#define init_stack              (init_thread_union.stack)
+
+#define THREAD_SIZE (2*PAGE_SIZE)
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+        struct thread_info *ti;
+
+        __asm__ __volatile__ (
+                "ldi    %0, #%1                 \n\t"
+                "and    %0, sp                  \n\t"
+                : "=r" (ti) : "i" (~(THREAD_SIZE - 1))
+        );
+
+        return ti;
+}
+
+/* thread information allocation */
+#if CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(tsk)                                  \
+        ({                                                      \
+                struct thread_info *ret;                        \
+                                                                \
+                ret = kmalloc(THREAD_SIZE, GFP_KERNEL);         \
+                if (ret)                                        \
+                        memset(ret, 0, THREAD_SIZE);            \
+                ret;                                            \
+         })
+#else
+#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#endif
+
+#define free_thread_info(info) kfree(info)
+#define get_thread_info(ti) get_task_struct((ti)->task)
+#define put_thread_info(ti) put_task_struct((ti)->task)
+
+#define TI_FLAG_FAULT_CODE_SHIFT        28
+
+static inline void set_thread_fault_code(unsigned int val)
+{
+        struct thread_info *ti = current_thread_info();
+        ti->flags = (ti->flags & (~0 >> (32 - TI_FLAG_FAULT_CODE_SHIFT)))
+                | (val << TI_FLAG_FAULT_CODE_SHIFT);
+}
+
+static inline unsigned int get_thread_fault_code(void)
+{
+        struct thread_info *ti = current_thread_info();
+        return ti->flags >> TI_FLAG_FAULT_CODE_SHIFT;
+}
+
+#else /* !__ASSEMBLY__ */
+
+#define THREAD_SIZE     8192
+
+/* how to get the thread information struct from ASM */
+#define GET_THREAD_INFO(reg)    GET_THREAD_INFO reg
+        .macro GET_THREAD_INFO reg
+        ldi     \reg, #-THREAD_SIZE
+        and     \reg, sp
+        .endm
+
+#endif
+
+/*
+ * thread information flags
+ * - these are process state flags that various assembly files may need to access
+ * - pending work-to-be-done flags are in LSW
+ * - other flags in MSW
+ */
+#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_SINGLESTEP          4       /* restore singlestep on return to user mode */
+#define TIF_IRET                5       /* return with iret */
+#define TIF_POLLING_NRFLAG      16      /* true if poll_idle() is polling TIF_NEED_RESCHED */
+                                        /* 31..28 fault code */
+#define TIF_MEMDIE              17
+
+#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_SINGLESTEP         (1<<TIF_SINGLESTEP)
+#define _TIF_IRET               (1<<TIF_IRET)
+#define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
+
+#define _TIF_WORK_MASK          0x0000FFFE      /* work to do on interrupt/exception return */
+#define _TIF_ALLWORK_MASK       0x0000FFFF      /* work to do on any return to u-space */
+
+/*
+ * Thread-synchronous status.
+ *
+ * This is different from the flags in that nobody else
+ * ever touches our thread-synchronous status, so we don't
+ * have to worry about atomic accesses.
+ */
+#define TS_USEDFPU              0x0001  /* FPU was used by this task this quantum (SMP) */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_M32R_THREAD_INFO_H */