mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
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/*
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* linux/arch/arm/mm/copypage-feroceon.S
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*
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* Copyright (C) 2008 Marvell Semiconductors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This handles copy_user_page and clear_user_page on Feroceon
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* more optimally than the generic implementations.
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*/
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#include <linux/init.h>
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#include <asm/page.h>
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void __attribute__((naked))
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feroceon_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr)
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{
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asm("\
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stmfd sp!, {r4-r9, lr} \n\
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mov ip, %0 \n\
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1: mov lr, r1 \n\
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ldmia r1!, {r2 - r9} \n\
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pld [lr, #32] \n\
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pld [lr, #64] \n\
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pld [lr, #96] \n\
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pld [lr, #128] \n\
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pld [lr, #160] \n\
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pld [lr, #192] \n\
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pld [lr, #224] \n\
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stmia r0, {r2 - r9} \n\
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ldmia r1!, {r2 - r9} \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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stmia r0, {r2 - r9} \n\
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ldmia r1!, {r2 - r9} \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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stmia r0, {r2 - r9} \n\
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ldmia r1!, {r2 - r9} \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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stmia r0, {r2 - r9} \n\
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ldmia r1!, {r2 - r9} \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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stmia r0, {r2 - r9} \n\
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ldmia r1!, {r2 - r9} \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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stmia r0, {r2 - r9} \n\
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ldmia r1!, {r2 - r9} \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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stmia r0, {r2 - r9} \n\
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ldmia r1!, {r2 - r9} \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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stmia r0, {r2 - r9} \n\
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subs ip, ip, #(32 * 8) \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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bne 1b \n\
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mcr p15, 0, ip, c7, c10, 4 @ drain WB\n\
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ldmfd sp!, {r4-r9, pc}"
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:
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: "I" (PAGE_SIZE));
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}
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void __attribute__((naked))
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feroceon_clear_user_page(void *kaddr, unsigned long vaddr)
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{
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asm("\
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stmfd sp!, {r4-r7, lr} \n\
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mov r1, %0 \n\
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mov r2, #0 \n\
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mov r3, #0 \n\
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mov r4, #0 \n\
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mov r5, #0 \n\
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mov r6, #0 \n\
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mov r7, #0 \n\
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mov ip, #0 \n\
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mov lr, #0 \n\
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1: stmia r0, {r2-r7, ip, lr} \n\
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subs r1, r1, #1 \n\
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mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
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add r0, r0, #32 \n\
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bne 1b \n\
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mcr p15, 0, r1, c7, c10, 4 @ drain WB\n\
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ldmfd sp!, {r4-r7, pc}"
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:
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: "I" (PAGE_SIZE / 32));
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}
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struct cpu_user_fns feroceon_user_fns __initdata = {
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.cpu_clear_user_page = feroceon_clear_user_page,
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.cpu_copy_user_page = feroceon_copy_user_page,
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};
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