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, 221 insertions, 0 deletions

diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
new file mode 100644
index 00000000000..a64e87d2201
--- /dev/null
+++ b/arch/mips/kernel/head.S
@@ -0,0 +1,221 @@
+/*
+ * 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) 1994, 1995 Waldorf Electronics
+ * Written by Ralf Baechle and Andreas Busse
+ * Copyright (C) 1994, 95, 96, 97, 98, 99, 2003 Ralf Baechle
+ * Copyright (C) 1996 Paul M. Antoine
+ * Modified for DECStation and hence R3000 support by Paul M. Antoine
+ * Further modifications by David S. Miller and Harald Koerfgen
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ * Kevin Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/threads.h>
+
+#include <asm/asm.h>
+#include <asm/regdef.h>
+#include <asm/page.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+#ifdef CONFIG_SGI_IP27
+#include <asm/sn/addrs.h>
+#include <asm/sn/sn0/hubni.h>
+#include <asm/sn/klkernvars.h>
+#endif
+
+	.macro	ARC64_TWIDDLE_PC
+#if defined(CONFIG_ARC64) || defined(CONFIG_MAPPED_KERNEL)
+	/* We get launched at a XKPHYS address but the kernel is linked to
+	   run at a KSEG0 address, so jump there.  */
+	PTR_LA	t0, \@f
+	jr	t0
+\@:
+#endif
+	.endm
+
+#ifdef CONFIG_SGI_IP27
+	/*
+	 * outputs the local nasid into res.  IP27 stuff.
+	 */
+	.macro GET_NASID_ASM res
+	dli	\res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID)
+	ld	\res, (\res)
+	and	\res, NSRI_NODEID_MASK
+	dsrl	\res, NSRI_NODEID_SHFT
+	.endm
+#endif /* CONFIG_SGI_IP27 */
+
+	/*
+	 * inputs are the text nasid in t1, data nasid in t2.
+	 */
+	.macro MAPPED_KERNEL_SETUP_TLB
+#ifdef CONFIG_MAPPED_KERNEL
+	/*
+	 * This needs to read the nasid - assume 0 for now.
+	 * Drop in 0xffffffffc0000000 in tlbhi, 0+VG in tlblo_0,
+	 * 0+DVG in tlblo_1.
+	 */
+	dli	t0, 0xffffffffc0000000
+	dmtc0	t0, CP0_ENTRYHI
+	li	t0, 0x1c000		# Offset of text into node memory
+	dsll	t1, NASID_SHFT		# Shift text nasid into place
+	dsll	t2, NASID_SHFT		# Same for data nasid
+	or	t1, t1, t0		# Physical load address of kernel text
+	or	t2, t2, t0		# Physical load address of kernel data
+	dsrl	t1, 12			# 4K pfn
+	dsrl	t2, 12			# 4K pfn
+	dsll	t1, 6			# Get pfn into place
+	dsll	t2, 6			# Get pfn into place
+	li	t0, ((_PAGE_GLOBAL|_PAGE_VALID| _CACHE_CACHABLE_COW) >> 6)
+	or	t0, t0, t1
+	mtc0	t0, CP0_ENTRYLO0	# physaddr, VG, cach exlwr
+	li	t0, ((_PAGE_GLOBAL|_PAGE_VALID| _PAGE_DIRTY|_CACHE_CACHABLE_COW) >> 6)
+	or	t0, t0, t2
+	mtc0	t0, CP0_ENTRYLO1	# physaddr, DVG, cach exlwr
+	li	t0, 0x1ffe000		# MAPPED_KERN_TLBMASK, TLBPGMASK_16M
+	mtc0	t0, CP0_PAGEMASK
+	li	t0, 0			# KMAP_INX
+	mtc0	t0, CP0_INDEX
+	li	t0, 1
+	mtc0	t0, CP0_WIRED
+	tlbwi
+#else
+	mtc0	zero, CP0_WIRED
+#endif
+	.endm
+
+	/*
+	 * For the moment disable interrupts, mark the kernel mode and
+	 * set ST0_KX so that the CPU does not spit fire when using
+	 * 64-bit addresses.  A full initialization of the CPU's status
+	 * register is done later in per_cpu_trap_init().
+	 */
+	.macro	setup_c0_status set clr
+	.set	push
+	mfc0	t0, CP0_STATUS
+	or	t0, ST0_CU0|\set|0x1f|\clr
+	xor	t0, 0x1f|\clr
+	mtc0	t0, CP0_STATUS
+	.set	noreorder
+	sll	zero,3				# ehb
+	.set	pop
+	.endm
+
+	.macro	setup_c0_status_pri
+#ifdef CONFIG_MIPS64
+	setup_c0_status ST0_KX 0
+#else
+	setup_c0_status 0 0
+#endif
+	.endm
+
+	.macro	setup_c0_status_sec
+#ifdef CONFIG_MIPS64
+	setup_c0_status ST0_KX ST0_BEV
+#else
+	setup_c0_status 0 ST0_BEV
+#endif
+	.endm
+
+	/*
+	 * Reserved space for exception handlers.
+	 * Necessary for machines which link their kernels at KSEG0.
+	 */
+	.fill	0x400
+
+EXPORT(stext)					# used for profiling
+EXPORT(_stext)
+
+	__INIT
+
+NESTED(kernel_entry, 16, sp)			# kernel entry point
+	setup_c0_status_pri
+
+#ifdef CONFIG_SGI_IP27
+	GET_NASID_ASM	t1
+	move	t2, t1				# text and data are here
+	MAPPED_KERNEL_SETUP_TLB
+#endif /* IP27 */
+
+	ARC64_TWIDDLE_PC
+
+	PTR_LA		t0, __bss_start		# clear .bss
+	LONG_S		zero, (t0)
+	PTR_LA		t1, __bss_stop - LONGSIZE
+1:
+	PTR_ADDIU	t0, LONGSIZE
+	LONG_S		zero, (t0)
+	bne		t0, t1, 1b
+
+	LONG_S		a0, fw_arg0		# firmware arguments
+	LONG_S		a1, fw_arg1
+	LONG_S		a2, fw_arg2
+	LONG_S		a3, fw_arg3
+
+	PTR_LA		$28, init_thread_union
+	PTR_ADDIU	sp, $28, _THREAD_SIZE - 32
+	set_saved_sp	sp, t0, t1
+	PTR_SUBU	sp, 4 * SZREG		# init stack pointer
+
+	j		start_kernel
+	END(kernel_entry)
+
+#ifdef CONFIG_SMP
+/*
+ * SMP slave cpus entry point.  Board specific code for bootstrap calls this
+ * function after setting up the stack and gp registers.
+ */
+NESTED(smp_bootstrap, 16, sp)
+	setup_c0_status_sec
+
+#ifdef CONFIG_SGI_IP27
+	GET_NASID_ASM	t1
+	dli	t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \
+		    KLDIR_OFF_POINTER + CAC_BASE
+	dsll	t1, NASID_SHFT
+	or	t0, t0, t1
+	ld	t0, 0(t0)			# t0 points to kern_vars struct
+	lh	t1, KV_RO_NASID_OFFSET(t0)
+	lh	t2, KV_RW_NASID_OFFSET(t0)
+	MAPPED_KERNEL_SETUP_TLB
+	ARC64_TWIDDLE_PC
+#endif /* CONFIG_SGI_IP27 */
+
+	j	start_secondary
+	END(smp_bootstrap)
+#endif /* CONFIG_SMP */
+
+	__FINIT
+
+	.comm	kernelsp,    NR_CPUS * 8, 8
+	.comm	pgd_current, NR_CPUS * 8, 8
+
+	.comm	fw_arg0, SZREG, SZREG		# firmware arguments
+	.comm	fw_arg1, SZREG, SZREG
+	.comm	fw_arg2, SZREG, SZREG
+	.comm	fw_arg3, SZREG, SZREG
+
+	.macro	page name, order=0
+	.globl	\name
+\name:	.size	\name, (_PAGE_SIZE << \order)
+	.org	. + (_PAGE_SIZE << \order)
+	.type	\name, @object
+	.endm
+
+	.data
+	.align	PAGE_SHIFT
+
+	/*
+	 * ... but on 64-bit we've got three-level pagetables with a
+	 * slightly different layout ...
+	 */
+	page	swapper_pg_dir, _PGD_ORDER
+#ifdef CONFIG_MIPS64
+	page	invalid_pmd_table, _PMD_ORDER
+#endif
+	page	invalid_pte_table, _PTE_ORDER