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138 lines
3.5 KiB
138 lines
3.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* NGpage.S: Niagara optimize clear and copy page. |
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* |
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* Copyright (C) 2006 (davem@davemloft.net) |
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*/ |
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#include <asm/asi.h> |
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#include <asm/page.h> |
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.text |
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.align 32 |
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/* This is heavily simplified from the sun4u variants |
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* because Niagara does not have any D-cache aliasing issues |
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* and also we don't need to use the FPU in order to implement |
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* an optimal page copy/clear. |
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*/ |
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NGcopy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */ |
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save %sp, -192, %sp |
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rd %asi, %g3 |
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wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi |
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set PAGE_SIZE, %g7 |
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prefetch [%i1 + 0x00], #one_read |
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prefetch [%i1 + 0x40], #one_read |
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1: prefetch [%i1 + 0x80], #one_read |
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prefetch [%i1 + 0xc0], #one_read |
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ldda [%i1 + 0x00] %asi, %o2 |
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ldda [%i1 + 0x10] %asi, %o4 |
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ldda [%i1 + 0x20] %asi, %l2 |
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ldda [%i1 + 0x30] %asi, %l4 |
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stxa %o2, [%i0 + 0x00] %asi |
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stxa %o3, [%i0 + 0x08] %asi |
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stxa %o4, [%i0 + 0x10] %asi |
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stxa %o5, [%i0 + 0x18] %asi |
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stxa %l2, [%i0 + 0x20] %asi |
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stxa %l3, [%i0 + 0x28] %asi |
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stxa %l4, [%i0 + 0x30] %asi |
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stxa %l5, [%i0 + 0x38] %asi |
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ldda [%i1 + 0x40] %asi, %o2 |
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ldda [%i1 + 0x50] %asi, %o4 |
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ldda [%i1 + 0x60] %asi, %l2 |
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ldda [%i1 + 0x70] %asi, %l4 |
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stxa %o2, [%i0 + 0x40] %asi |
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stxa %o3, [%i0 + 0x48] %asi |
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stxa %o4, [%i0 + 0x50] %asi |
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stxa %o5, [%i0 + 0x58] %asi |
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stxa %l2, [%i0 + 0x60] %asi |
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stxa %l3, [%i0 + 0x68] %asi |
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stxa %l4, [%i0 + 0x70] %asi |
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stxa %l5, [%i0 + 0x78] %asi |
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add %i1, 128, %i1 |
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subcc %g7, 128, %g7 |
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bne,pt %xcc, 1b |
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add %i0, 128, %i0 |
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wr %g3, 0x0, %asi |
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membar #Sync |
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ret |
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restore |
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.align 32 |
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.globl NGclear_page |
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.globl NGclear_user_page |
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NGclear_page: /* %o0=dest */ |
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NGclear_user_page: /* %o0=dest, %o1=vaddr */ |
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rd %asi, %g3 |
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wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi |
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set PAGE_SIZE, %g7 |
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1: stxa %g0, [%o0 + 0x00] %asi |
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stxa %g0, [%o0 + 0x08] %asi |
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stxa %g0, [%o0 + 0x10] %asi |
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stxa %g0, [%o0 + 0x18] %asi |
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stxa %g0, [%o0 + 0x20] %asi |
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stxa %g0, [%o0 + 0x28] %asi |
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stxa %g0, [%o0 + 0x30] %asi |
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stxa %g0, [%o0 + 0x38] %asi |
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stxa %g0, [%o0 + 0x40] %asi |
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stxa %g0, [%o0 + 0x48] %asi |
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stxa %g0, [%o0 + 0x50] %asi |
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stxa %g0, [%o0 + 0x58] %asi |
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stxa %g0, [%o0 + 0x60] %asi |
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stxa %g0, [%o0 + 0x68] %asi |
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stxa %g0, [%o0 + 0x70] %asi |
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stxa %g0, [%o0 + 0x78] %asi |
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stxa %g0, [%o0 + 0x80] %asi |
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stxa %g0, [%o0 + 0x88] %asi |
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stxa %g0, [%o0 + 0x90] %asi |
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stxa %g0, [%o0 + 0x98] %asi |
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stxa %g0, [%o0 + 0xa0] %asi |
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stxa %g0, [%o0 + 0xa8] %asi |
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stxa %g0, [%o0 + 0xb0] %asi |
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stxa %g0, [%o0 + 0xb8] %asi |
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stxa %g0, [%o0 + 0xc0] %asi |
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stxa %g0, [%o0 + 0xc8] %asi |
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stxa %g0, [%o0 + 0xd0] %asi |
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stxa %g0, [%o0 + 0xd8] %asi |
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stxa %g0, [%o0 + 0xe0] %asi |
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stxa %g0, [%o0 + 0xe8] %asi |
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stxa %g0, [%o0 + 0xf0] %asi |
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stxa %g0, [%o0 + 0xf8] %asi |
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subcc %g7, 256, %g7 |
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bne,pt %xcc, 1b |
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add %o0, 256, %o0 |
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wr %g3, 0x0, %asi |
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membar #Sync |
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retl |
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nop |
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#define BRANCH_ALWAYS 0x10680000 |
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#define NOP 0x01000000 |
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#define NG_DO_PATCH(OLD, NEW) \ |
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sethi %hi(NEW), %g1; \ |
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or %g1, %lo(NEW), %g1; \ |
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sethi %hi(OLD), %g2; \ |
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or %g2, %lo(OLD), %g2; \ |
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sub %g1, %g2, %g1; \ |
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sethi %hi(BRANCH_ALWAYS), %g3; \ |
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sll %g1, 11, %g1; \ |
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srl %g1, 11 + 2, %g1; \ |
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or %g3, %lo(BRANCH_ALWAYS), %g3; \ |
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or %g3, %g1, %g3; \ |
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stw %g3, [%g2]; \ |
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sethi %hi(NOP), %g3; \ |
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or %g3, %lo(NOP), %g3; \ |
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stw %g3, [%g2 + 0x4]; \ |
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flush %g2; |
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.globl niagara_patch_pageops |
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.type niagara_patch_pageops,#function |
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niagara_patch_pageops: |
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NG_DO_PATCH(copy_user_page, NGcopy_user_page) |
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NG_DO_PATCH(_clear_page, NGclear_page) |
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NG_DO_PATCH(clear_user_page, NGclear_user_page) |
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retl |
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nop |
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.size niagara_patch_pageops,.-niagara_patch_pageops
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