Linux-2.6.12-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, 267 insertions, 0 deletions

diff --git a/arch/arm/mm/proc-arm720.S b/arch/arm/mm/proc-arm720.S
new file mode 100644
index 000000000000..57cfa6a2f54f
--- /dev/null
+++ b/arch/arm/mm/proc-arm720.S
@@ -0,0 +1,267 @@
+/*
+ *  linux/arch/arm/mm/proc-arm720.S: MMU functions for ARM720
+ *
+ *  Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
+ *                     Rob Scott (rscott@mtrob.fdns.net)
+ *  Copyright (C) 2000 ARM Limited, Deep Blue Solutions Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *
+ * These are the low level assembler for performing cache and TLB
+ * functions on the ARM720T.  The ARM720T has a writethrough IDC
+ * cache, so we don't need to clean it.
+ *
+ *  Changelog:
+ *   05-09-2000 SJH	Created by moving 720 specific functions
+ *			out of 'proc-arm6,7.S' per RMK discussion
+ *   07-25-2000 SJH	Added idle function.
+ *   08-25-2000	DBS	Updated for integration of ARM Ltd version.
+ */
+#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>
+#include <asm/hardware.h>
+
+/*
+ * Function: arm720_proc_init (void)
+ *	   : arm720_proc_fin (void)
+ *
+ * Notes   : This processor does not require these
+ */
+ENTRY(cpu_arm720_dcache_clean_area)
+ENTRY(cpu_arm720_proc_init)
+		mov	pc, lr
+
+ENTRY(cpu_arm720_proc_fin)
+		stmfd	sp!, {lr}
+		mov	ip, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
+		msr	cpsr_c, ip
+		mrc	p15, 0, r0, c1, c0, 0
+		bic	r0, r0, #0x1000			@ ...i............
+		bic	r0, r0, #0x000e			@ ............wca.
+		mcr	p15, 0, r0, c1, c0, 0		@ disable caches
+		mcr	p15, 0, r1, c7, c7, 0		@ invalidate cache
+		ldmfd	sp!, {pc}
+
+/*
+ * Function: arm720_proc_do_idle(void)
+ * Params  : r0 = unused
+ * Purpose : put the processer in proper idle mode
+ */
+ENTRY(cpu_arm720_do_idle)
+		mov	pc, lr
+
+/*
+ * Function: arm720_switch_mm(unsigned long pgd_phys)
+ * Params  : pgd_phys	Physical address of page table
+ * Purpose : Perform a task switch, saving the old process' state and restoring
+ *	     the new.
+ */
+ENTRY(cpu_arm720_switch_mm)
+		mov	r1, #0
+		mcr	p15, 0, r1, c7, c7, 0		@ invalidate cache
+		mcr	p15, 0, r0, c2, c0, 0		@ update page table ptr
+		mcr	p15, 0, r1, c8, c7, 0		@ flush TLB (v4)
+		mov	pc, lr
+
+/*
+ * Function: arm720_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_arm720_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: arm720_reset
+ * Params  : r0 = address to jump to
+ * Notes   : This sets up everything for a reset
+ */
+ENTRY(cpu_arm720_reset)
+		mov	ip, #0
+		mcr	p15, 0, ip, c7, c7, 0		@ invalidate cache
+		mcr	p15, 0, ip, c8, c7, 0		@ flush TLB (v4)
+		mrc	p15, 0, ip, c1, c0, 0		@ get ctrl register
+		bic	ip, ip, #0x000f			@ ............wcam
+		bic	ip, ip, #0x2100			@ ..v....s........
+		mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
+		mov	pc, r0
+
+	__INIT
+
+	.type	__arm710_setup, #function
+__arm710_setup:
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c7, 0		@ invalidate caches
+	mcr	p15, 0, r0, c8, c7, 0		@ flush TLB (v4)
+	mrc	p15, 0, r0, c1, c0		@ get control register
+	ldr	r5, arm710_cr1_clear
+	bic	r0, r0, r5
+	ldr	r5, arm710_cr1_set
+	orr	r0, r0, r5
+	mov	pc, lr				@ __ret (head.S)
+	.size	__arm710_setup, . - __arm710_setup
+
+	/*
+	 *  R
+	 * .RVI ZFRS BLDP WCAM
+	 * .... 0001 ..11 1101
+	 * 
+	 */
+	.type	arm710_cr1_clear, #object
+	.type	arm710_cr1_set, #object
+arm710_cr1_clear:
+	.word	0x0f3f
+arm710_cr1_set:
+	.word	0x013d
+
+	.type	__arm720_setup, #function
+__arm720_setup:
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c7, 0		@ invalidate caches
+	mcr	p15, 0, r0, c8, c7, 0		@ flush TLB (v4)
+	mrc	p15, 0, r0, c1, c0		@ get control register
+	ldr	r5, arm720_cr1_clear
+	bic	r0, r0, r5
+	ldr	r5, arm720_cr1_set
+	orr	r0, r0, r5
+	mov	pc, lr				@ __ret (head.S)
+	.size	__arm720_setup, . - __arm720_setup
+
+	/*
+	 *  R
+	 * .RVI ZFRS BLDP WCAM
+	 * ..1. 1001 ..11 1101
+	 * 
+	 */
+	.type	arm720_cr1_clear, #object
+	.type	arm720_cr1_set, #object
+arm720_cr1_clear:
+	.word	0x2f3f
+arm720_cr1_set:
+	.word	0x213d
+
+		__INITDATA
+
+/*
+ * Purpose : Function pointers used to access above functions - all calls
+ *	     come through these
+ */
+		.type	arm720_processor_functions, #object
+ENTRY(arm720_processor_functions)
+		.word	v4t_late_abort
+		.word	cpu_arm720_proc_init
+		.word	cpu_arm720_proc_fin
+		.word	cpu_arm720_reset
+		.word	cpu_arm720_do_idle
+		.word	cpu_arm720_dcache_clean_area
+		.word	cpu_arm720_switch_mm
+		.word	cpu_arm720_set_pte
+		.size	arm720_processor_functions, . - arm720_processor_functions
+
+		.section ".rodata"
+
+		.type	cpu_arch_name, #object
+cpu_arch_name:	.asciz	"armv4t"
+		.size	cpu_arch_name, . - cpu_arch_name
+
+		.type	cpu_elf_name, #object
+cpu_elf_name:	.asciz	"v4"
+		.size	cpu_elf_name, . - cpu_elf_name
+
+		.type	cpu_arm710_name, #object
+cpu_arm710_name:
+		.asciz	"ARM710T"
+		.size	cpu_arm710_name, . - cpu_arm710_name
+
+		.type	cpu_arm720_name, #object
+cpu_arm720_name:
+		.asciz	"ARM720T"
+		.size	cpu_arm720_name, . - cpu_arm720_name
+
+		.align
+
+/*
+ * See linux/include/asm-arm/procinfo.h for a definition of this structure.
+ */
+	
+		.section ".proc.info", #alloc, #execinstr
+
+		.type	__arm710_proc_info, #object
+__arm710_proc_info:
+		.long	0x41807100				@ cpu_val
+		.long	0xffffff00				@ cpu_mask
+		.long   PMD_TYPE_SECT | \
+			PMD_SECT_BUFFERABLE | \
+			PMD_SECT_CACHEABLE | \
+			PMD_BIT4 | \
+			PMD_SECT_AP_WRITE | \
+			PMD_SECT_AP_READ
+		b	__arm710_setup				@ cpu_flush
+		.long	cpu_arch_name				@ arch_name
+		.long	cpu_elf_name				@ elf_name
+		.long	HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB	@ elf_hwcap
+		.long	cpu_arm710_name				@ name
+		.long	arm720_processor_functions
+		.long	v4_tlb_fns
+		.long	v4wt_user_fns
+		.long	v4_cache_fns
+		.size	__arm710_proc_info, . - __arm710_proc_info
+
+		.type	__arm720_proc_info, #object
+__arm720_proc_info:
+		.long	0x41807200				@ cpu_val
+		.long	0xffffff00				@ cpu_mask
+		.long   PMD_TYPE_SECT | \
+			PMD_SECT_BUFFERABLE | \
+			PMD_SECT_CACHEABLE | \
+			PMD_BIT4 | \
+			PMD_SECT_AP_WRITE | \
+			PMD_SECT_AP_READ
+		b	__arm720_setup				@ cpu_flush
+		.long	cpu_arch_name				@ arch_name
+		.long	cpu_elf_name				@ elf_name
+		.long	HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB	@ elf_hwcap
+		.long	cpu_arm720_name				@ name
+		.long	arm720_processor_functions
+		.long	v4_tlb_fns
+		.long	v4wt_user_fns
+		.long	v4_cache_fns
+		.size	__arm720_proc_info, . - __arm720_proc_info