Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 205 insertions, 0 deletions

diff --git a/arch/arm/mm/proc-arm720.S b/arch/arm/mm/proc-arm720.S
new file mode 100644
index 0000000000..3b687e6dd9
--- /dev/null
+++ b/arch/arm/mm/proc-arm720.S
@@ -0,0 +1,205 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *  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.
+ *  hacked for non-paged-MM by Hyok S. Choi, 2004.
+ *
+ * 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.
+ *   04-20-2004 HSC	modified for non-paged memory management mode.
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/pgtable.h>
+#include <asm/assembler.h>
+#include <asm/asm-offsets.h>
+#include <asm/hwcap.h>
+#include <asm/pgtable-hwdef.h>
+#include <asm/ptrace.h>
+
+#include "proc-macros.S"
+
+/*
+ * 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)
+		ret	lr
+
+ENTRY(cpu_arm720_proc_fin)
+		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
+		ret	lr
+
+/*
+ * Function: arm720_proc_do_idle(void)
+ * Params  : r0 = unused
+ * Purpose : put the processor in proper idle mode
+ */
+ENTRY(cpu_arm720_do_idle)
+		ret	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)
+#ifdef CONFIG_MMU
+		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)
+#endif
+		ret	lr
+
+/*
+ * Function: arm720_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext)
+ * 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_ext)
+#ifdef CONFIG_MMU
+	armv3_set_pte_ext wc_disable=0
+#endif
+	ret	lr
+
+/*
+ * Function: arm720_reset
+ * Params  : r0 = address to jump to
+ * Notes   : This sets up everything for a reset
+ */
+		.pushsection	.idmap.text, "ax"
+ENTRY(cpu_arm720_reset)
+		mov	ip, #0
+		mcr	p15, 0, ip, c7, c7, 0		@ invalidate cache
+#ifdef CONFIG_MMU
+		mcr	p15, 0, ip, c8, c7, 0		@ flush TLB (v4)
+#endif
+		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
+		ret	r0
+ENDPROC(cpu_arm720_reset)
+		.popsection
+
+	.type	__arm710_setup, #function
+__arm710_setup:
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c7, 0		@ invalidate caches
+#ifdef CONFIG_MMU
+	mcr	p15, 0, r0, c8, c7, 0		@ flush TLB (v4)
+#endif
+	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
+	ret	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
+#ifdef CONFIG_MMU
+	mcr	p15, 0, r0, c8, c7, 0		@ flush TLB (v4)
+#endif
+	adr	r5, arm720_crval
+	ldmia	r5, {r5, r6}
+	mrc	p15, 0, r0, c1, c0		@ get control register
+	bic	r0, r0, r5
+	orr	r0, r0, r6
+	ret	lr				@ __ret (head.S)
+	.size	__arm720_setup, . - __arm720_setup
+
+	/*
+	 *  R
+	 * .RVI ZFRS BLDP WCAM
+	 * ..1. 1001 ..11 1101
+	 * 
+	 */
+	.type	arm720_crval, #object
+arm720_crval:
+	crval	clear=0x00002f3f, mmuset=0x0000213d, ucset=0x00000130
+
+		__INITDATA
+	@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
+	define_processor_functions arm720, dabort=v4t_late_abort, pabort=legacy_pabort
+
+		.section ".rodata"
+
+	string	cpu_arch_name, "armv4t"
+	string	cpu_elf_name, "v4"
+	string	cpu_arm710_name, "ARM710T"
+	string	cpu_arm720_name, "ARM720T"
+
+		.align
+
+/*
+ * See <asm/procinfo.h> for a definition of this structure.
+ */
+	
+		.section ".proc.info.init", "a"
+
+.macro arm720_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, cpu_flush:req
+		.type	__\name\()_proc_info,#object
+__\name\()_proc_info:
+		.long	\cpu_val
+		.long	\cpu_mask
+		.long   PMD_TYPE_SECT | \
+			PMD_SECT_BUFFERABLE | \
+			PMD_SECT_CACHEABLE | \
+			PMD_BIT4 | \
+			PMD_SECT_AP_WRITE | \
+			PMD_SECT_AP_READ
+		.long   PMD_TYPE_SECT | \
+			PMD_BIT4 | \
+			PMD_SECT_AP_WRITE | \
+			PMD_SECT_AP_READ
+		initfn	\cpu_flush, __\name\()_proc_info	@ 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_name
+		.long	arm720_processor_functions
+		.long	v4_tlb_fns
+		.long	v4wt_user_fns
+		.long	v4_cache_fns
+		.size	__\name\()_proc_info, . - __\name\()_proc_info
+.endm
+
+	arm720_proc_info arm710, 0x41807100, 0xffffff00, cpu_arm710_name, __arm710_setup
+	arm720_proc_info arm720, 0x41807200, 0xffffff00, cpu_arm720_name, __arm720_setup