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, 359 insertions, 0 deletions

diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c
new file mode 100644
index 00000000000..b556c3cf649
--- /dev/null
+++ b/arch/m32r/kernel/process.c
@@ -0,0 +1,359 @@
+/*
+ *  linux/arch/m32r/kernel/process.c
+ *
+ *  Copyright (c) 2001, 2002  Hiroyuki Kondo, Hirokazu Takata,
+ *                            Hitoshi Yamamoto
+ *  Taken from sh version.
+ *    Copyright (C) 1995  Linus Torvalds
+ *    SuperH version:  Copyright (C) 1999, 2000  Niibe Yutaka & Kaz Kojima
+ */
+
+#undef DEBUG_PROCESS
+#ifdef DEBUG_PROCESS
+#define DPRINTK(fmt, args...)  printk("%s:%d:%s: " fmt, __FILE__, __LINE__, \
+  __FUNCTION__, ##args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+/*
+ * This file handles the architecture-dependent parts of process handling..
+ */
+
+#include <linux/fs.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/hardirq.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/mmu_context.h>
+#include <asm/elf.h>
+#include <asm/m32r.h>
+
+#include <linux/err.h>
+
+static int hlt_counter=0;
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+unsigned long thread_saved_pc(struct task_struct *tsk)
+{
+	return tsk->thread.lr;
+}
+
+/*
+ * Powermanagement idle function, if any..
+ */
+void (*pm_idle)(void) = NULL;
+
+void disable_hlt(void)
+{
+	hlt_counter++;
+}
+
+EXPORT_SYMBOL(disable_hlt);
+
+void enable_hlt(void)
+{
+	hlt_counter--;
+}
+
+EXPORT_SYMBOL(enable_hlt);
+
+/*
+ * We use this is we don't have any better
+ * idle routine..
+ */
+void default_idle(void)
+{
+	/* M32R_FIXME: Please use "cpu_sleep" mode.  */
+	cpu_relax();
+}
+
+/*
+ * On SMP it's slightly faster (but much more power-consuming!)
+ * to poll the ->work.need_resched flag instead of waiting for the
+ * cross-CPU IPI to arrive. Use this option with caution.
+ */
+static void poll_idle (void)
+{
+	/* M32R_FIXME */
+	cpu_relax();
+}
+
+/*
+ * The idle thread. There's no useful work to be
+ * done, so just try to conserve power and have a
+ * low exit latency (ie sit in a loop waiting for
+ * somebody to say that they'd like to reschedule)
+ */
+void cpu_idle (void)
+{
+	/* endless idle loop with no priority at all */
+	while (1) {
+		while (!need_resched()) {
+			void (*idle)(void) = pm_idle;
+
+			if (!idle)
+				idle = default_idle;
+
+			idle();
+		}
+		schedule();
+	}
+}
+
+void machine_restart(char *__unused)
+{
+	printk("Please push reset button!\n");
+	while (1)
+		cpu_relax();
+}
+
+EXPORT_SYMBOL(machine_restart);
+
+void machine_halt(void)
+{
+	printk("Please push reset button!\n");
+	while (1)
+		cpu_relax();
+}
+
+EXPORT_SYMBOL(machine_halt);
+
+void machine_power_off(void)
+{
+	/* M32R_FIXME */
+}
+
+EXPORT_SYMBOL(machine_power_off);
+
+static int __init idle_setup (char *str)
+{
+	if (!strncmp(str, "poll", 4)) {
+		printk("using poll in idle threads.\n");
+		pm_idle = poll_idle;
+	} else if (!strncmp(str, "sleep", 4)) {
+		printk("using sleep in idle threads.\n");
+		pm_idle = default_idle;
+	}
+
+	return 1;
+}
+
+__setup("idle=", idle_setup);
+
+void show_regs(struct pt_regs * regs)
+{
+	printk("\n");
+	printk("BPC[%08lx]:PSW[%08lx]:LR [%08lx]:FP [%08lx]\n", \
+	  regs->bpc, regs->psw, regs->lr, regs->fp);
+	printk("BBPC[%08lx]:BBPSW[%08lx]:SPU[%08lx]:SPI[%08lx]\n", \
+	  regs->bbpc, regs->bbpsw, regs->spu, regs->spi);
+	printk("R0 [%08lx]:R1 [%08lx]:R2 [%08lx]:R3 [%08lx]\n", \
+	  regs->r0, regs->r1, regs->r2, regs->r3);
+	printk("R4 [%08lx]:R5 [%08lx]:R6 [%08lx]:R7 [%08lx]\n", \
+	  regs->r4, regs->r5, regs->r6, regs->r7);
+	printk("R8 [%08lx]:R9 [%08lx]:R10[%08lx]:R11[%08lx]\n", \
+	  regs->r8, regs->r9, regs->r10, regs->r11);
+	printk("R12[%08lx]\n", \
+	  regs->r12);
+
+#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
+	printk("ACC0H[%08lx]:ACC0L[%08lx]\n", \
+	  regs->acc0h, regs->acc0l);
+	printk("ACC1H[%08lx]:ACC1L[%08lx]\n", \
+	  regs->acc1h, regs->acc1l);
+#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
+	printk("ACCH[%08lx]:ACCL[%08lx]\n", \
+	  regs->acch, regs->accl);
+#else
+#error unknown isa configuration
+#endif
+}
+
+/*
+ * Create a kernel thread
+ */
+
+/*
+ * This is the mechanism for creating a new kernel thread.
+ *
+ * NOTE! Only a kernel-only process(ie the swapper or direct descendants
+ * who haven't done an "execve()") should use this: it will work within
+ * a system call from a "real" process, but the process memory space will
+ * not be free'd until both the parent and the child have exited.
+ */
+static void kernel_thread_helper(void *nouse, int (*fn)(void *), void *arg)
+{
+	fn(arg);
+	do_exit(-1);
+}
+
+int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
+{
+	struct pt_regs regs;
+
+	memset(&regs, 0, sizeof (regs));
+	regs.r1 = (unsigned long)fn;
+	regs.r2 = (unsigned long)arg;
+
+	regs.bpc = (unsigned long)kernel_thread_helper;
+
+	regs.psw = M32R_PSW_BIE;
+
+	/* Ok, create the new process. */
+	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL,
+		NULL);
+}
+
+/*
+ * Free current thread data structures etc..
+ */
+void exit_thread(void)
+{
+	/* Nothing to do. */
+	DPRINTK("pid = %d\n", current->pid);
+}
+
+void flush_thread(void)
+{
+	DPRINTK("pid = %d\n", current->pid);
+	memset(&current->thread.debug_trap, 0, sizeof(struct debug_trap));
+}
+
+void release_thread(struct task_struct *dead_task)
+{
+	/* do nothing */
+	DPRINTK("pid = %d\n", dead_task->pid);
+}
+
+/* Fill in the fpu structure for a core dump.. */
+int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
+{
+	return 0; /* Task didn't use the fpu at all. */
+}
+
+int copy_thread(int nr, unsigned long clone_flags, unsigned long spu,
+	unsigned long unused, struct task_struct *tsk, struct pt_regs *regs)
+{
+	struct pt_regs *childregs;
+	unsigned long sp = (unsigned long)tsk->thread_info + THREAD_SIZE;
+	extern void ret_from_fork(void);
+
+	/* Copy registers */
+	sp -= sizeof (struct pt_regs);
+	childregs = (struct pt_regs *)sp;
+	*childregs = *regs;
+
+	childregs->spu = spu;
+	childregs->r0 = 0;	/* Child gets zero as return value */
+	regs->r0 = tsk->pid;
+	tsk->thread.sp = (unsigned long)childregs;
+	tsk->thread.lr = (unsigned long)ret_from_fork;
+
+	return 0;
+}
+
+/*
+ * fill in the user structure for a core dump..
+ */
+void dump_thread(struct pt_regs * regs, struct user * dump)
+{
+	/* M32R_FIXME */
+}
+
+/*
+ * Capture the user space registers if the task is not running (in user space)
+ */
+int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
+{
+	/* M32R_FIXME */
+	return 1;
+}
+
+asmlinkage int sys_fork(unsigned long r0, unsigned long r1, unsigned long r2,
+	unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6,
+	struct pt_regs regs)
+{
+#ifdef CONFIG_MMU
+	return do_fork(SIGCHLD, regs.spu, &regs, 0, NULL, NULL);
+#else
+	return -EINVAL;
+#endif /* CONFIG_MMU */
+}
+
+asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
+			 unsigned long parent_tidptr,
+			 unsigned long child_tidptr,
+			 unsigned long r4, unsigned long r5, unsigned long r6,
+			 struct pt_regs regs)
+{
+	if (!newsp)
+		newsp = regs.spu;
+
+	return do_fork(clone_flags, newsp, &regs, 0,
+		       (int __user *)parent_tidptr, (int __user *)child_tidptr);
+}
+
+/*
+ * This is trivial, and on the face of it looks like it
+ * could equally well be done in user mode.
+ *
+ * Not so, for quite unobvious reasons - register pressure.
+ * In user mode vfork() cannot have a stack frame, and if
+ * done by calling the "clone()" system call directly, you
+ * do not have enough call-clobbered registers to hold all
+ * the information you need.
+ */
+asmlinkage int sys_vfork(unsigned long r0, unsigned long r1, unsigned long r2,
+	unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6,
+	struct pt_regs regs)
+{
+	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.spu, &regs, 0,
+			NULL, NULL);
+}
+
+/*
+ * sys_execve() executes a new program.
+ */
+asmlinkage int sys_execve(char __user *ufilename, char __user * __user *uargv,
+			  char __user * __user *uenvp,
+			  unsigned long r3, unsigned long r4, unsigned long r5,
+			  unsigned long r6, struct pt_regs regs)
+{
+	int error;
+	char *filename;
+
+	filename = getname(ufilename);
+	error = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		goto out;
+
+	error = do_execve(filename, uargv, uenvp, &regs);
+	if (error == 0) {
+		task_lock(current);
+		current->ptrace &= ~PT_DTRACE;
+		task_unlock(current);
+	}
+	putname(filename);
+out:
+	return error;
+}
+
+/*
+ * These bracket the sleeping functions..
+ */
+#define first_sched	((unsigned long) scheduling_functions_start_here)
+#define last_sched	((unsigned long) scheduling_functions_end_here)
+
+unsigned long get_wchan(struct task_struct *p)
+{
+	/* M32R_FIXME */
+	return (0);
+}