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, 404 insertions, 0 deletions

diff --git a/arch/arm/mm/proc-arm6_7.S b/arch/arm/mm/proc-arm6_7.S
new file mode 100644
index 0000000..0ee214b
--- /dev/null
+++ b/arch/arm/mm/proc-arm6_7.S
@@ -0,0 +1,404 @@
+/*
+ *  linux/arch/arm/mm/proc-arm6,7.S
+ *
+ *  Copyright (C) 1997-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  These are the low level assembler for performing cache and TLB
+ *  functions on the ARM610 & ARM710.
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/assembler.h>
+#include <asm/constants.h>
+#include <asm/pgtable.h>
+#include <asm/procinfo.h>
+#include <asm/ptrace.h>
+
+ENTRY(cpu_arm6_dcache_clean_area)
+ENTRY(cpu_arm7_dcache_clean_area)
+		mov	pc, lr
+
+/*
+ * Function: arm6_7_data_abort ()
+ *
+ * Params  : r2 = address of aborted instruction
+ *	   : sp = pointer to registers
+ *
+ * Purpose : obtain information about current aborted instruction
+ *
+ * Returns : r0 = address of abort
+ *	   : r1 = FSR
+ */
+
+ENTRY(cpu_arm7_data_abort)
+	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
+	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
+	ldr	r8, [r0]			@ read arm instruction
+	tst	r8, #1 << 20			@ L = 1 -> write?
+	orreq	r1, r1, #1 << 8			@ yes.
+	and	r7, r8, #15 << 24
+	add	pc, pc, r7, lsr #22		@ Now branch to the relevant processing routine
+	nop
+
+/* 0 */	b	.data_unknown
+/* 1 */	mov	pc, lr				@ swp
+/* 2 */	b	.data_unknown
+/* 3 */	b	.data_unknown
+/* 4 */	b	.data_arm_lateldrpostconst	@ ldr	rd, [rn], #m
+/* 5 */	b	.data_arm_lateldrpreconst	@ ldr	rd, [rn, #m]
+/* 6 */	b	.data_arm_lateldrpostreg	@ ldr	rd, [rn], rm
+/* 7 */	b	.data_arm_lateldrprereg		@ ldr	rd, [rn, rm]
+/* 8 */	b	.data_arm_ldmstm		@ ldm*a	rn, <rlist>
+/* 9 */	b	.data_arm_ldmstm		@ ldm*b	rn, <rlist>
+/* a */	b	.data_unknown
+/* b */	b	.data_unknown
+/* c */	mov	pc, lr				@ ldc	rd, [rn], #m	@ Same as ldr	rd, [rn], #m
+/* d */	mov	pc, lr				@ ldc	rd, [rn, #m]
+/* e */	b	.data_unknown
+/* f */
+.data_unknown:	@ Part of jumptable
+	mov	r0, r2
+	mov	r1, r8
+	mov	r2, sp
+	bl	baddataabort
+	b	ret_from_exception
+
+ENTRY(cpu_arm6_data_abort)
+	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
+	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
+	ldr	r8, [r2]			@ read arm instruction
+	tst	r8, #1 << 20			@ L = 1 -> write?
+	orreq	r1, r1, #1 << 8			@ yes.
+	and	r7, r8, #14 << 24
+	teq	r7, #8 << 24			@ was it ldm/stm
+	movne	pc, lr
+
+.data_arm_ldmstm:
+	tst	r8, #1 << 21			@ check writeback bit
+	moveq	pc, lr				@ no writeback -> no fixup
+	mov	r7, #0x11
+	orr	r7, r7, #0x1100
+	and	r6, r8, r7
+	and	r2, r8, r7, lsl #1
+	add	r6, r6, r2, lsr #1
+	and	r2, r8, r7, lsl #2
+	add	r6, r6, r2, lsr #2
+	and	r2, r8, r7, lsl #3
+	add	r6, r6, r2, lsr #3
+	add	r6, r6, r6, lsr #8
+	add	r6, r6, r6, lsr #4
+	and	r6, r6, #15			@ r6 = no. of registers to transfer.
+	and	r5, r8, #15 << 16		@ Extract 'n' from instruction
+	ldr	r7, [sp, r5, lsr #14]		@ Get register 'Rn'
+	tst	r8, #1 << 23			@ Check U bit
+	subne	r7, r7, r6, lsl #2		@ Undo increment
+	addeq	r7, r7, r6, lsl #2		@ Undo decrement
+	str	r7, [sp, r5, lsr #14]		@ Put register 'Rn'
+	mov	pc, lr
+
+.data_arm_apply_r6_and_rn:
+	and	r5, r8, #15 << 16		@ Extract 'n' from instruction
+	ldr	r7, [sp, r5, lsr #14]		@ Get register 'Rn'
+	tst	r8, #1 << 23			@ Check U bit
+	subne	r7, r7, r6			@ Undo incrmenet
+	addeq	r7, r7, r6			@ Undo decrement
+	str	r7, [sp, r5, lsr #14]		@ Put register 'Rn'
+	mov	pc, lr
+
+.data_arm_lateldrpreconst:
+	tst	r8, #1 << 21			@ check writeback bit
+	moveq	pc, lr				@ no writeback -> no fixup
+.data_arm_lateldrpostconst:
+	movs	r2, r8, lsl #20			@ Get offset
+	moveq	pc, lr				@ zero -> no fixup
+	and	r5, r8, #15 << 16		@ Extract 'n' from instruction
+	ldr	r7, [sp, r5, lsr #14]		@ Get register 'Rn'
+	tst	r8, #1 << 23			@ Check U bit
+	subne	r7, r7, r2, lsr #20		@ Undo increment
+	addeq	r7, r7, r2, lsr #20		@ Undo decrement
+	str	r7, [sp, r5, lsr #14]		@ Put register 'Rn'
+	mov	pc, lr
+
+.data_arm_lateldrprereg:
+	tst	r8, #1 << 21			@ check writeback bit
+	moveq	pc, lr				@ no writeback -> no fixup
+.data_arm_lateldrpostreg:
+	and	r7, r8, #15			@ Extract 'm' from instruction
+	ldr	r6, [sp, r7, lsl #2]		@ Get register 'Rm'
+	mov	r5, r8, lsr #7			@ get shift count
+	ands	r5, r5, #31
+	and	r7, r8, #0x70			@ get shift type
+	orreq	r7, r7, #8			@ shift count = 0
+	add	pc, pc, r7
+	nop
+
+	mov	r6, r6, lsl r5			@ 0: LSL #!0
+	b	.data_arm_apply_r6_and_rn
+	b	.data_arm_apply_r6_and_rn	@ 1: LSL #0
+	nop
+	b	.data_unknown			@ 2: MUL?
+	nop
+	b	.data_unknown			@ 3: MUL?
+	nop
+	mov	r6, r6, lsr r5			@ 4: LSR #!0
+	b	.data_arm_apply_r6_and_rn
+	mov	r6, r6, lsr #32			@ 5: LSR #32
+	b	.data_arm_apply_r6_and_rn
+	b	.data_unknown			@ 6: MUL?
+	nop
+	b	.data_unknown			@ 7: MUL?
+	nop
+	mov	r6, r6, asr r5			@ 8: ASR #!0
+	b	.data_arm_apply_r6_and_rn
+	mov	r6, r6, asr #32			@ 9: ASR #32
+	b	.data_arm_apply_r6_and_rn
+	b	.data_unknown			@ A: MUL?
+	nop
+	b	.data_unknown			@ B: MUL?
+	nop
+	mov	r6, r6, ror r5			@ C: ROR #!0
+	b	.data_arm_apply_r6_and_rn
+	mov	r6, r6, rrx			@ D: RRX
+	b	.data_arm_apply_r6_and_rn
+	b	.data_unknown			@ E: MUL?
+	nop
+	b	.data_unknown			@ F: MUL?
+
+/*
+ * Function: arm6_7_proc_init (void)
+ *	   : arm6_7_proc_fin (void)
+ *
+ * Notes   : This processor does not require these
+ */
+ENTRY(cpu_arm6_proc_init)
+ENTRY(cpu_arm7_proc_init)
+		mov	pc, lr
+
+ENTRY(cpu_arm6_proc_fin)
+ENTRY(cpu_arm7_proc_fin)
+		mov	r0, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
+		msr	cpsr_c, r0
+		mov	r0, #0x31			@ ....S..DP...M
+		mcr	p15, 0, r0, c1, c0, 0		@ disable caches
+		mov	pc, lr
+
+ENTRY(cpu_arm6_do_idle)
+ENTRY(cpu_arm7_do_idle)
+		mov	pc, lr
+
+/*
+ * Function: arm6_7_switch_mm(unsigned long pgd_phys)
+ * Params  : pgd_phys	Physical address of page table
+ * Purpose : Perform a task switch, saving the old processes state, and restoring
+ *	     the new.
+ */
+ENTRY(cpu_arm6_switch_mm)
+ENTRY(cpu_arm7_switch_mm)
+		mov	r1, #0
+		mcr	p15, 0, r1, c7, c0, 0		@ flush cache
+		mcr	p15, 0, r0, c2, c0, 0		@ update page table ptr
+		mcr	p15, 0, r1, c5, c0, 0		@ flush TLBs
+		mov	pc, lr
+
+/*
+ * Function: arm6_7_set_pte(pte_t *ptep, pte_t pte)
+ * Params  : r0 = Address to set
+ *	   : r1 = value to set
+ * Purpose : Set a PTE and flush it out of any WB cache
+ */
+		.align	5
+ENTRY(cpu_arm6_set_pte)
+ENTRY(cpu_arm7_set_pte)
+		str	r1, [r0], #-2048		@ linux version
+
+		eor	r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
+
+		bic	r2, r1, #PTE_SMALL_AP_MASK
+		bic	r2, r2, #PTE_TYPE_MASK
+		orr	r2, r2, #PTE_TYPE_SMALL
+
+		tst	r1, #L_PTE_USER			@ User?
+		orrne	r2, r2, #PTE_SMALL_AP_URO_SRW
+
+		tst	r1, #L_PTE_WRITE | L_PTE_DIRTY	@ Write and Dirty?
+		orreq	r2, r2, #PTE_SMALL_AP_UNO_SRW
+
+		tst	r1, #L_PTE_PRESENT | L_PTE_YOUNG	@ Present and Young
+		movne	r2, #0
+
+		str	r2, [r0]			@ hardware version
+		mov	pc, lr
+
+/*
+ * Function: _arm6_7_reset
+ * Params  : r0 = address to jump to
+ * Notes   : This sets up everything for a reset
+ */
+ENTRY(cpu_arm6_reset)
+ENTRY(cpu_arm7_reset)
+		mov	r1, #0
+		mcr	p15, 0, r1, c7, c0, 0		@ flush cache
+		mcr	p15, 0, r1, c5, c0, 0		@ flush TLB
+		mov	r1, #0x30
+		mcr	p15, 0, r1, c1, c0, 0		@ turn off MMU etc
+		mov	pc, r0
+
+		__INIT
+
+		.type	__arm6_setup, #function
+__arm6_setup:	mov	r0, #0
+		mcr	p15, 0, r0, c7, c0		@ flush caches on v3
+		mcr	p15, 0, r0, c5, c0		@ flush TLBs on v3
+		mov	r0, #0x3d			@ . ..RS BLDP WCAM
+		orr	r0, r0, #0x100			@ . ..01 0011 1101
+		mov	pc, lr
+		.size	__arm6_setup, . - __arm6_setup
+
+		.type	__arm7_setup, #function
+__arm7_setup:	mov	r0, #0
+		mcr	p15, 0, r0, c7, c0		@ flush caches on v3
+		mcr	p15, 0, r0, c5, c0		@ flush TLBs on v3
+		mcr	p15, 0, r0, c3, c0		@ load domain access register
+		mov	r0, #0x7d			@ . ..RS BLDP WCAM
+		orr	r0, r0, #0x100			@ . ..01 0111 1101
+		mov	pc, lr
+		.size	__arm7_setup, . - __arm7_setup
+
+		__INITDATA
+
+/*
+ * Purpose : Function pointers used to access above functions - all calls
+ *	     come through these
+ */
+		.type	arm6_processor_functions, #object
+ENTRY(arm6_processor_functions)
+		.word	cpu_arm6_data_abort
+		.word	cpu_arm6_proc_init
+		.word	cpu_arm6_proc_fin
+		.word	cpu_arm6_reset
+		.word	cpu_arm6_do_idle
+		.word	cpu_arm6_dcache_clean_area
+		.word	cpu_arm6_switch_mm
+		.word	cpu_arm6_set_pte
+		.size	arm6_processor_functions, . - arm6_processor_functions
+
+/*
+ * Purpose : Function pointers used to access above functions - all calls
+ *	     come through these
+ */
+		.type	arm7_processor_functions, #object
+ENTRY(arm7_processor_functions)
+		.word	cpu_arm7_data_abort
+		.word	cpu_arm7_proc_init
+		.word	cpu_arm7_proc_fin
+		.word	cpu_arm7_reset
+		.word	cpu_arm7_do_idle
+		.word	cpu_arm7_dcache_clean_area
+		.word	cpu_arm7_switch_mm
+		.word	cpu_arm7_set_pte
+		.size	arm7_processor_functions, . - arm7_processor_functions
+
+		.section ".rodata"
+
+		.type	cpu_arch_name, #object
+cpu_arch_name:	.asciz	"armv3"
+		.size	cpu_arch_name, . - cpu_arch_name
+
+		.type	cpu_elf_name, #object
+cpu_elf_name:	.asciz	"v3"
+		.size	cpu_elf_name, . - cpu_elf_name
+
+		.type	cpu_arm6_name, #object
+cpu_arm6_name:	.asciz	"ARM6"
+		.size	cpu_arm6_name, . - cpu_arm6_name
+
+		.type	cpu_arm610_name, #object
+cpu_arm610_name:
+		.asciz	"ARM610"
+		.size	cpu_arm610_name, . - cpu_arm610_name
+
+		.type	cpu_arm7_name, #object
+cpu_arm7_name:	.asciz	"ARM7"
+		.size	cpu_arm7_name, . - cpu_arm7_name
+
+		.type	cpu_arm710_name, #object
+cpu_arm710_name:
+		.asciz	"ARM710"
+		.size	cpu_arm710_name, . - cpu_arm710_name
+
+		.align
+
+		.section ".proc.info", #alloc, #execinstr
+
+		.type	__arm6_proc_info, #object
+__arm6_proc_info:
+		.long	0x41560600
+		.long	0xfffffff0
+		.long	0x00000c1e
+		b	__arm6_setup
+		.long	cpu_arch_name
+		.long	cpu_elf_name
+		.long	HWCAP_SWP | HWCAP_26BIT
+		.long	cpu_arm6_name
+		.long	arm6_processor_functions
+		.long	v3_tlb_fns
+		.long	v3_user_fns
+		.long	v3_cache_fns
+		.size	__arm6_proc_info, . - __arm6_proc_info
+
+		.type	__arm610_proc_info, #object
+__arm610_proc_info:
+		.long	0x41560610
+		.long	0xfffffff0
+		.long	0x00000c1e
+		b	__arm6_setup
+		.long	cpu_arch_name
+		.long	cpu_elf_name
+		.long	HWCAP_SWP | HWCAP_26BIT
+		.long	cpu_arm610_name
+		.long	arm6_processor_functions
+		.long	v3_tlb_fns
+		.long	v3_user_fns
+		.long	v3_cache_fns
+		.size	__arm610_proc_info, . - __arm610_proc_info
+
+		.type	__arm7_proc_info, #object
+__arm7_proc_info:
+		.long	0x41007000
+		.long	0xffffff00
+		.long	0x00000c1e
+		b	__arm7_setup
+		.long	cpu_arch_name
+		.long	cpu_elf_name
+		.long	HWCAP_SWP | HWCAP_26BIT
+		.long	cpu_arm7_name
+		.long	arm7_processor_functions
+		.long	v3_tlb_fns
+		.long	v3_user_fns
+		.long	v3_cache_fns
+		.size	__arm7_proc_info, . - __arm7_proc_info
+
+		.type	__arm710_proc_info, #object
+__arm710_proc_info:
+		.long	0x41007100
+		.long	0xfff8ff00
+		.long   PMD_TYPE_SECT | \
+			PMD_SECT_BUFFERABLE | \
+			PMD_SECT_CACHEABLE | \
+			PMD_BIT4 | \
+			PMD_SECT_AP_WRITE | \
+			PMD_SECT_AP_READ
+		b	__arm7_setup
+		.long	cpu_arch_name
+		.long	cpu_elf_name
+		.long	HWCAP_SWP | HWCAP_26BIT
+		.long	cpu_arm710_name
+		.long	arm7_processor_functions
+		.long	v3_tlb_fns
+		.long	v3_user_fns
+		.long	v3_cache_fns
+		.size	__arm710_proc_info, . - __arm710_proc_info