1 files changed, 113 insertions, 0 deletions
diff --git a/arch/arm/mm/copypage-xsc3.c b/arch/arm/mm/copypage-xsc3.c
new file mode 100644
index 000000000000..39a994542cad
--- /dev/null
+++ b/arch/arm/mm/copypage-xsc3.c
@@ -0,0 +1,113 @@
+/*
+ *  linux/arch/arm/mm/copypage-xsc3.S
+ *
+ *  Copyright (C) 2004 Intel Corp.
+ *
+ * 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.
+ *
+ * Adapted for 3rd gen XScale core, no more mini-dcache
+ * Author: Matt Gilbert (matthew.m.gilbert@intel.com)
+ */
+#include <linux/init.h>
+#include <linux/highmem.h>
+/*
+ * General note:
+ *  We don't really want write-allocate cache behaviour for these functions
+ *  since that will just eat through 8K of the cache.
+ */
+/*
+ * XSC3 optimised copy_user_highpage
+ *  r0 = destination
+ *  r1 = source
+ *
+ * The source page may have some clean entries in the cache already, but we
+ * can safely ignore them - break_cow() will flush them out of the cache
+ * if we eventually end up using our copied page.
+ *
+ */
+static void __attribute__((naked))
+xsc3_mc_copy_user_page(void *kto, const void *kfrom)
+{
+        asm("\
+        stmfd   sp!, {r4, r5, lr}               \n\
+        mov     lr, %0                          \n\
+                                                \n\
+        pld     [r1, #0]                        \n\
+        pld     [r1, #32]                       \n\
+1:      pld     [r1, #64]                       \n\
+        pld     [r1, #96]                       \n\
+                                                \n\
+2:      ldrd    r2, [r1], #8                    \n\
+        mov     ip, r0                          \n\
+        ldrd    r4, [r1], #8                    \n\
+        mcr     p15, 0, ip, c7, c6, 1           @ invalidate\n\
+        strd    r2, [r0], #8                    \n\
+        ldrd    r2, [r1], #8                    \n\
+        strd    r4, [r0], #8                    \n\
+        ldrd    r4, [r1], #8                    \n\
+        strd    r2, [r0], #8                    \n\
+        strd    r4, [r0], #8                    \n\
+        ldrd    r2, [r1], #8                    \n\
+        mov     ip, r0                          \n\
+        ldrd    r4, [r1], #8                    \n\
+        mcr     p15, 0, ip, c7, c6, 1           @ invalidate\n\
+        strd    r2, [r0], #8                    \n\
+        ldrd    r2, [r1], #8                    \n\
+        subs    lr, lr, #1                      \n\
+        strd    r4, [r0], #8                    \n\
+        ldrd    r4, [r1], #8                    \n\
+        strd    r2, [r0], #8                    \n\
+        strd    r4, [r0], #8                    \n\
+        bgt     1b                              \n\
+        beq     2b                              \n\
+                                                \n\
+        ldmfd   sp!, {r4, r5, pc}"
+        :
+        : "I" (PAGE_SIZE / 64 - 1));
+}
+void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
+        unsigned long vaddr)
+{
+        void *kto, *kfrom;
+        kto = kmap_atomic(to, KM_USER0);
+        kfrom = kmap_atomic(from, KM_USER1);
+        xsc3_mc_copy_user_page(kto, kfrom);
+        kunmap_atomic(kfrom, KM_USER1);
+        kunmap_atomic(kto, KM_USER0);
+}
+/*
+ * XScale optimised clear_user_page
+ *  r0 = destination
+ *  r1 = virtual user address of ultimate destination page
+ */
+void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
+{
+        void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+        asm volatile ("\
+        mov     r1, %2                          \n\
+        mov     r2, #0                          \n\
+        mov     r3, #0                          \n\
+1:      mcr     p15, 0, %0, c7, c6, 1           @ invalidate line\n\
+        strd    r2, [%0], #8                    \n\
+        strd    r2, [%0], #8                    \n\
+        strd    r2, [%0], #8                    \n\
+        strd    r2, [%0], #8                    \n\
+        subs    r1, r1, #1                      \n\
+        bne     1b"
+        : "=r" (ptr)
+        : "0" (kaddr), "I" (PAGE_SIZE / 32)
+        : "r1", "r2", "r3");
+        kunmap_atomic(kaddr, KM_USER0);
+}
+struct cpu_user_fns xsc3_mc_user_fns __initdata = {
+        .cpu_clear_user_highpage = xsc3_mc_clear_user_highpage,
+        .cpu_copy_user_highpage = xsc3_mc_copy_user_highpage,
+};

diff --git a/arch/arm/mm/copypage-xsc3.c b/arch/arm/mm/copypage-xsc3.c new file mode 100644 index 000000000000..39a994542cad --- /dev/null +++ b/arch/arm/mm/copypage-xsc3.c
@@ -0,0 +1,113 @@
	1	/*
	2	* linux/arch/arm/mm/copypage-xsc3.S
	3	*
	4	* Copyright (C) 2004 Intel Corp.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	* Adapted for 3rd gen XScale core, no more mini-dcache
	11	* Author: Matt Gilbert (matthew.m.gilbert@intel.com)
	12	*/
	13	#include <linux/init.h>
	14	#include <linux/highmem.h>
	15
	16	/*
	17	* General note:
	18	* We don't really want write-allocate cache behaviour for these functions
	19	* since that will just eat through 8K of the cache.
	20	*/
	21
	22	/*
	23	* XSC3 optimised copy_user_highpage
	24	* r0 = destination
	25	* r1 = source
	26	*
	27	* The source page may have some clean entries in the cache already, but we
	28	* can safely ignore them - break_cow() will flush them out of the cache
	29	* if we eventually end up using our copied page.
	30	*
	31	*/
	32	static void __attribute__((naked))
	33	xsc3_mc_copy_user_page(void kto, const void kfrom)
	34	{
	35	asm("\
	36	stmfd sp!, {r4, r5, lr} \n\
	37	mov lr, %0 \n\
	38	\n\
	39	pld [r1, #0] \n\
	40	pld [r1, #32] \n\
	41	1: pld [r1, #64] \n\
	42	pld [r1, #96] \n\
	43	\n\
	44	2: ldrd r2, [r1], #8 \n\
	45	mov ip, r0 \n\
	46	ldrd r4, [r1], #8 \n\
	47	mcr p15, 0, ip, c7, c6, 1 @ invalidate\n\
	48	strd r2, [r0], #8 \n\
	49	ldrd r2, [r1], #8 \n\
	50	strd r4, [r0], #8 \n\
	51	ldrd r4, [r1], #8 \n\
	52	strd r2, [r0], #8 \n\
	53	strd r4, [r0], #8 \n\
	54	ldrd r2, [r1], #8 \n\
	55	mov ip, r0 \n\
	56	ldrd r4, [r1], #8 \n\
	57	mcr p15, 0, ip, c7, c6, 1 @ invalidate\n\
	58	strd r2, [r0], #8 \n\
	59	ldrd r2, [r1], #8 \n\
	60	subs lr, lr, #1 \n\
	61	strd r4, [r0], #8 \n\
	62	ldrd r4, [r1], #8 \n\
	63	strd r2, [r0], #8 \n\
	64	strd r4, [r0], #8 \n\
	65	bgt 1b \n\
	66	beq 2b \n\
	67	\n\
	68	ldmfd sp!, {r4, r5, pc}"
	69	:
	70	: "I" (PAGE_SIZE / 64 - 1));
	71	}
	72
	73	void xsc3_mc_copy_user_highpage(struct page to, struct page from,
	74	unsigned long vaddr)
	75	{
	76	void kto, kfrom;
	77
	78	kto = kmap_atomic(to, KM_USER0);
	79	kfrom = kmap_atomic(from, KM_USER1);
	80	xsc3_mc_copy_user_page(kto, kfrom);
	81	kunmap_atomic(kfrom, KM_USER1);
	82	kunmap_atomic(kto, KM_USER0);
	83	}
	84
	85	/*
	86	* XScale optimised clear_user_page
	87	* r0 = destination
	88	* r1 = virtual user address of ultimate destination page
	89	*/
	90	void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
	91	{
	92	void ptr, kaddr = kmap_atomic(page, KM_USER0);
	93	asm volatile ("\
	94	mov r1, %2 \n\
	95	mov r2, #0 \n\
	96	mov r3, #0 \n\
	97	1: mcr p15, 0, %0, c7, c6, 1 @ invalidate line\n\
	98	strd r2, [%0], #8 \n\
	99	strd r2, [%0], #8 \n\
	100	strd r2, [%0], #8 \n\
	101	strd r2, [%0], #8 \n\
	102	subs r1, r1, #1 \n\
	103	bne 1b"
	104	: "=r" (ptr)
	105	: "0" (kaddr), "I" (PAGE_SIZE / 32)
	106	: "r1", "r2", "r3");
	107	kunmap_atomic(kaddr, KM_USER0);
	108	}
	109
	110	struct cpu_user_fns xsc3_mc_user_fns __initdata = {
	111	.cpu_clear_user_highpage = xsc3_mc_clear_user_highpage,
	112	.cpu_copy_user_highpage = xsc3_mc_copy_user_highpage,
	113	};