[Gc-linux-cvs] linux/arch/powerpc/kernel cputable.c, NONE, 1.1 head_32.S, NONE, 1.1 machine_kexec.c, NONE, 1.1

[Albert H. <he...@us...>]

Update of /cvsroot/gc-linux/linux/arch/powerpc/kernel
In directory sc8-pr-cvs2.sourceforge.net:/tmp/cvs-serv7117/arch/powerpc/kernel

Added Files:
	cputable.c head_32.S machine_kexec.c 
Log Message:
Added powerpc arch.
Tweaked some driver for wii compatibility.


--- NEW FILE: machine_kexec.c ---
/*
 * Code to handle transition of Linux booting another kernel.
 *
 * Copyright (C) 2002-2003 Eric Biederman  <ebi...@xm...>
 * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz
 * Copyright (C) 2005 IBM Corporation.
 *
 * This source code is licensed under the GNU General Public License,
 * Version 2.  See the file COPYING for more details.
 */

#include <linux/kexec.h>
#include <linux/reboot.h>
#include <linux/threads.h>
#include <asm/machdep.h>
#include <asm/lmb.h>

void machine_crash_shutdown(struct pt_regs *regs)
{
	if (ppc_md.machine_crash_shutdown)
		ppc_md.machine_crash_shutdown(regs);
}

/*
 * Do what every setup is needed on image and the
 * reboot code buffer to allow us to avoid allocations
 * later.
 */
int machine_kexec_prepare(struct kimage *image)
{
	if (ppc_md.machine_kexec_prepare)
		return ppc_md.machine_kexec_prepare(image);
	/*
	 * Fail if platform doesn't provide its own machine_kexec_prepare
	 * implementation.
	 */
	return -ENOSYS;
}

void machine_kexec_cleanup(struct kimage *image)
{
	if (ppc_md.machine_kexec_cleanup)
		ppc_md.machine_kexec_cleanup(image);
}

/*
 * Do not allocate memory (or fail in any way) in machine_kexec().
 * We are past the point of no return, committed to rebooting now.
 */
NORET_TYPE void machine_kexec(struct kimage *image)
{
	if (ppc_md.machine_kexec)
		ppc_md.machine_kexec(image);
	else {
		/*
		 * Fall back to normal restart if platform doesn't provide
		 * its own kexec function, and user insist to kexec...
		 */
		machine_restart(NULL);
	}
	for(;;);
}

void __init reserve_crashkernel(void)
{
#ifndef CONFIG_GAMECUBE
	unsigned long long crash_size, crash_base;
	int ret;

	/* this is necessary because of lmb_phys_mem_size() */
	lmb_analyze();

	/* use common parsing */
	ret = parse_crashkernel(boot_command_line, lmb_phys_mem_size(),
			&crash_size, &crash_base);
	if (ret == 0 && crash_size > 0) {
		if (crash_base == 0)
			crash_base = KDUMP_KERNELBASE;
		crashk_res.start = crash_base;
	} else {
		/* handle the device tree */
		crash_size = crashk_res.end - crashk_res.start + 1;
	}

	if (crash_size == 0)
		return;

	/* We might have got these values via the command line or the
	 * device tree, either way sanitise them now. */

	if (crashk_res.start != KDUMP_KERNELBASE)
		printk("Crash kernel location must be 0x%x\n",
				KDUMP_KERNELBASE);

	crashk_res.start = KDUMP_KERNELBASE;
	crash_size = PAGE_ALIGN(crash_size);
	crashk_res.end = crashk_res.start + crash_size - 1;

	/* Crash kernel trumps memory limit */
	if (memory_limit && memory_limit <= crashk_res.end) {
		memory_limit = crashk_res.end + 1;
		printk("Adjusted memory limit for crashkernel, now 0x%lx\n",
				memory_limit);
	}

	printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
			"for crashkernel (System RAM: %ldMB)\n",
			(unsigned long)(crash_size >> 20),
			(unsigned long)(crashk_res.start >> 20),
			(unsigned long)(lmb_phys_mem_size() >> 20));

	lmb_reserve(crashk_res.start, crash_size);
#endif
}

int overlaps_crashkernel(unsigned long start, unsigned long size)
{
	return (start + size) > crashk_res.start && start <= crashk_res.end;
}

--- NEW FILE: cputable.c ---
/*
 *  Copyright (C) 2001 Ben. Herrenschmidt (be...@ke...)
 *
 *  Modifications for ppc64:
 *      Copyright (C) 2003 Dave Engebretsen <eng...@us...>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version
 *  2 of the License, or (at your option) any later version.
 */

#include <linux/string.h>
#include <linux/sched.h>
#include <linux/threads.h>
#include <linux/init.h>
#include <linux/module.h>

#include <asm/oprofile_impl.h>
[...1389 lines suppressed...]

		if ((value & fcur->mask) == fcur->value)
			continue;

		/* These PTRRELOCs will disappear once the new scheme for
		 * modules and vdso is implemented
		 */
		pstart = ((unsigned int *)fcur) + (fcur->start_off / 4);
		pend = ((unsigned int *)fcur) + (fcur->end_off / 4);

		for (p = pstart; p < pend; p++) {
			*p = 0x60000000u;
			asm volatile ("dcbst 0, %0" : : "r" (p));
		}
		asm volatile ("sync" : : : "memory");
		for (p = pstart; p < pend; p++)
			asm volatile ("icbi 0,%0" : : "r" (p));
		asm volatile ("sync; isync" : : : "memory");
	}
}

--- NEW FILE: head_32.S ---
/*
 *  PowerPC version
 *    Copyright (C) 1995-1996 Gary Thomas (gd...@li...)
 *
 *  Rewritten by Cort Dougan (co...@cs...) for PReP
 *    Copyright (C) 1996 Cort Dougan <co...@cs...>
 *  Adapted for Power Macintosh by Paul Mackerras.
 *  Low-level exception handlers and MMU support
 *  rewritten by Paul Mackerras.
 *    Copyright (C) 1996 Paul Mackerras.
 *  MPC8xx modifications Copyright (C) 1997 Dan Malek (dm...@jl...).
 *
 *  This file contains the low-level support and setup for the
 *  PowerPC platform, including trap and interrupt dispatch.
 *  (The PPC 8xx embedded CPUs use head_8xx.S instead.)
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version
[...1316 lines suppressed...]
	.space	4096

	.globl	swapper_pg_dir
swapper_pg_dir:
	.space	PGD_TABLE_SIZE

	.globl intercept_table
intercept_table:
	.long 0, 0, i0x200, i0x300, i0x400, 0, i0x600, i0x700
	.long i0x800, 0, 0, 0, 0, i0xd00, 0, 0
	.long 0, 0, 0, i0x1300, 0, 0, 0, 0
	.long 0, 0, 0, 0, 0, 0, 0, 0
	.long 0, 0, 0, 0, 0, 0, 0, 0
	.long 0, 0, 0, 0, 0, 0, 0, 0

/* Room for two PTE pointers, usually the kernel and current user pointers
 * to their respective root page table.
 */
abatron_pteptrs:
	.space	8