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julius |
/* Overlay manager for SPU.
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Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
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This file is part of the GNU Binutils.
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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 as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* MFC DMA defn's. */
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#define MFC_GET_CMD 0x40
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#define MFC_MAX_DMA_SIZE 0x4000
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#define MFC_TAG_UPDATE_ALL 2
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#define MFC_TAG_ID 0
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/* Register usage. */
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#define reserved1 $75
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#define parm $75
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#define tab1 reserved1
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#define tab2 reserved1
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#define vma reserved1
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#define oldvma reserved1
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#define newmask reserved1
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#define map reserved1
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#define reserved2 $76
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#define off1 reserved2
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#define off2 reserved2
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#define present1 reserved2
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#define present2 reserved2
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#define sz reserved2
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#define cmp reserved2
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#define add64 reserved2
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#define cgbits reserved2
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#define off3 reserved2
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#define off4 reserved2
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#define addr4 reserved2
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#define off5 reserved2
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#define tagstat reserved2
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#define reserved3 $77
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#define size1 reserved3
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#define size2 reserved3
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#define rv3 reserved3
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#define ealo reserved3
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#define cmd reserved3
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#define off64 reserved3
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#define tab3 reserved3
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#define tab4 reserved3
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#define tab5 reserved3
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#define reserved4 $78
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#define ovl reserved4
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#define rv2 reserved4
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#define rv5 reserved4
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#define cgshuf reserved4
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#define newovl reserved4
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#define reserved5 $79
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#define target reserved5
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#define save1 $72
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#define rv4 save1
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#define rv7 save1
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#define tagid save1
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#define maxsize save1
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#define pbyte save1
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#define pbit save1
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#define save2 $73
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#define cur save2
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#define rv6 save2
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#define osize save2
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#define zovl save2
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#define oldovl save2
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#define newvma save2
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#define save3 $74
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#define rv1 save3
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#define ea64 save3
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#define buf3 save3
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#define genwi save3
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#define newmap save3
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#define oldmask save3
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.text
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.align 4
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.type __rv_pattern, @object
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.size __rv_pattern, 16
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__rv_pattern:
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.word 0x00010203, 0x10111213, 0x80808080, 0x80808080
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.type __cg_pattern, @object
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.size __cg_pattern, 16
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__cg_pattern:
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.word 0x04050607, 0x80808080, 0x80808080, 0x80808080
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.type __ovly_current, @object
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.size __ovly_current, 16
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__ovly_current:
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.space 16
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/*
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* __ovly_return - stub for returning from overlay functions.
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*
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* On entry the four slots of $lr are:
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* __ovly_return, prev ovl index, caller return addr, undefined.
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*
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* Load the previous overlay and jump to the caller return address.
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* Updates __ovly_current.
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*/
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.align 4
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.global __ovly_return
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.type __ovly_return, @function
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__ovly_return:
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ila tab1, _ovly_table - 16 # 0,2 0
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shlqbyi ovl, $lr, 4 # 1,4 0
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#nop
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shlqbyi target, $lr, 8 # 1,4 1
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#nop; lnop
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#nop; lnop
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shli off1, ovl, 4 # 0,4 4
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#lnop
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#nop
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hbr ovly_ret9, target # 1,15 5
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#nop; lnop
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#nop; lnop
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#nop
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lqx vma, tab1, off1 # 1,6 8
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#nop; lnop
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#nop; lnop
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#nop; lnop
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#nop; lnop
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#nop; lnop
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#nop
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rotqbyi size1, vma, 4 # 1,4 14
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#nop
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stqd save3, -48($sp) # 1,6 15
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#nop
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stqd save2, -32($sp) # 1,6 16
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#nop
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stqd save1, -16($sp) # 1,6 17
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andi present1, size1, 1 # 0,2 18
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stqr ovl, __ovly_current # 1,6 18
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#nop; lnop
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#nop
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brz present1, do_load # 1,4 20
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ovly_ret9:
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#nop
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bi target # 1,4 21
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/*
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* __ovly_load - copy an overlay partion to local store.
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*
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* On entry $75 points to a word consisting of the overlay index in
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* the top 14 bits, and the target address in the bottom 18 bits.
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*
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* Sets up $lr to return via __ovly_return.
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* Updates __ovly_current.
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*/
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.align 3
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.global __ovly_load
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.type __ovly_load, @function
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__ovly_load:
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#if OVL_STUB_SIZE == 8
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########
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#nop
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lqd target, 0(parm) # 1,6 -11
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#nop; lnop
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#nop; lnop
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#nop; lnop
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#nop; lnop
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#nop; lnop
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#nop
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rotqby target, target, parm # 1,4 -5
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ila tab2, _ovly_table - 16 # 0,2 -4
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stqd save3, -48($sp) # 1,6 -4
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#nop
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stqd save2, -32($sp) # 1,6 -3
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#nop
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stqd save1, -16($sp) # 1,6 -2
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rotmi ovl, target, -18 # 0,4 -1
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hbr ovly_load9, target # 1,15 -1
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ila rv1, __ovly_return # 0,2 0
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#lnop
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#nop; lnop
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#nop
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lqr cur, __ovly_current # 1,6 2
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shli off2, ovl, 4 # 0,4 3
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stqr ovl, __ovly_current # 1,6 3
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ceq rv2, $lr, rv1 # 0,2 4
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lqr rv3, __rv_pattern # 1,6 4
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#nop; lnop
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#nop; lnop
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#nop
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lqx vma, tab2, off2 # 1,6 7
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########
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#else /* OVL_STUB_SIZE == 16 */
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########
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ila tab2, _ovly_table - 16 # 0,2 0
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stqd save3, -48($sp) # 1,6 0
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ila rv1, __ovly_return # 0,2 1
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stqd save2, -32($sp) # 1,6 1
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shli off2, ovl, 4 # 0,4 2
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lqr cur, __ovly_current # 1,6 2
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nop
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stqr ovl, __ovly_current # 1,6 3
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ceq rv2, $lr, rv1 # 0,2 4
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lqr rv3, __rv_pattern # 1,6 4
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#nop
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hbr ovly_load9, target # 1,15 5
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#nop
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lqx vma, tab2, off2 # 1,6 6
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#nop
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stqd save1, -16($sp) # 1,6 7
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########
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#endif
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#nop; lnop
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#nop; lnop
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#nop
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shufb rv4, rv1, cur, rv3 # 1,4 10
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#nop
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fsmb rv5, rv2 # 1,4 11
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#nop
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rotqmbyi rv6, $lr, -8 # 1,4 12
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#nop
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rotqbyi size2, vma, 4 # 1,4 13
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#nop
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lqd save3, -48($sp) # 1,6 14
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#nop; lnop
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or rv7, rv4, rv6 # 0,2 16
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lqd save2, -32($sp) # 1,6 16
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andi present2, size2, 1 # 0,2 17
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lnop # 1,0 17
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selb $lr, rv7, $lr, rv5 # 0,2 18
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lqd save1, -16($sp) # 1,6 18
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#nop
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brz present2, do_load # 1,4 19
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ovly_load9:
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#nop
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bi target # 1,4 20
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/* If we get here, we are about to load a new overlay.
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* "vma" contains the relevant entry from _ovly_table[].
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* extern struct {
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* u32 vma;
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* u32 size;
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* u32 file_offset;
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* u32 buf;
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* } _ovly_table[];
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*/
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.align 3
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.global __ovly_load_event
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.type __ovly_load_event, @function
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__ovly_load_event:
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do_load:
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#nop
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rotqbyi sz, vma, 8 # 1,4 0
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#nop
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rotqbyi osize, vma, 4 # 1,4 1
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#nop
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| 276 |
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lqa ea64, _EAR_ # 1,6 2
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#nop
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| 278 |
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lqr cgshuf, __cg_pattern # 1,6 3
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| 279 |
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| 280 |
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/* We could predict the branch at the end of this loop by adding a few
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instructions, and there are plenty of free cycles to do so without
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| 282 |
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impacting loop execution time. However, it doesn't make a great
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| 283 |
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deal of sense since we need to wait for the dma to complete anyway. */
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| 284 |
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__ovly_xfer_loop:
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| 285 |
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#nop
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| 286 |
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rotqmbyi off64, sz, -4 # 1,4 4
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| 287 |
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#nop; lnop
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| 288 |
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#nop; lnop
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| 289 |
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#nop; lnop
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| 290 |
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cg cgbits, ea64, off64 # 0,2 8
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| 291 |
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#lnop
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| 292 |
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#nop; lnop
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| 293 |
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#nop
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| 294 |
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shufb add64, cgbits, cgbits, cgshuf # 1,4 10
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| 295 |
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#nop; lnop
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| 296 |
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#nop; lnop
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| 297 |
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#nop; lnop
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| 298 |
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addx add64, ea64, off64 # 0,2 14
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| 299 |
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#lnop
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| 300 |
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ila maxsize, MFC_MAX_DMA_SIZE # 0,2 15
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| 301 |
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lnop
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| 302 |
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ori ea64, add64, 0 # 0,2 16
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| 303 |
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rotqbyi ealo, add64, 4 # 1,4 16
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| 304 |
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cgt cmp, osize, maxsize # 0,2 17
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| 305 |
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wrch $MFC_LSA, vma # 1,6 17
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| 306 |
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#nop; lnop
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| 307 |
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selb sz, osize, maxsize, cmp # 0,2 19
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| 308 |
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wrch $MFC_EAH, ea64 # 1,6 19
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| 309 |
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ila tagid, MFC_TAG_ID # 0,2 20
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| 310 |
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wrch $MFC_EAL, ealo # 1,6 20
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| 311 |
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ila cmd, MFC_GET_CMD # 0,2 21
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| 312 |
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wrch $MFC_Size, sz # 1,6 21
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| 313 |
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sf osize, sz, osize # 0,2 22
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| 314 |
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wrch $MFC_TagId, tagid # 1,6 22
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| 315 |
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a vma, vma, sz # 0,2 23
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| 316 |
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wrch $MFC_Cmd, cmd # 1,6 23
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| 317 |
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#nop
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| 318 |
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brnz osize, __ovly_xfer_loop # 1,4 24
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| 319 |
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| 320 |
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/* Now update our data structions while waiting for DMA to complete.
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| 321 |
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Low bit of .size needs to be cleared on the _ovly_table entry
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| 322 |
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corresponding to the evicted overlay, and set on the entry for the
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| 323 |
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newly loaded overlay. Note that no overlay may in fact be evicted
|
| 324 |
|
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as _ovly_buf_table[] starts with all zeros. Don't zap .size entry
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| 325 |
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for zero index! Also of course update the _ovly_buf_table entry. */
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| 326 |
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#nop
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| 327 |
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lqr newovl, __ovly_current # 1,6 25
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| 328 |
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#nop; lnop
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| 329 |
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#nop; lnop
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| 330 |
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#nop; lnop
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| 331 |
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#nop; lnop
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| 332 |
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#nop; lnop
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| 333 |
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shli off3, newovl, 4 # 0,4 31
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| 334 |
|
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#lnop
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| 335 |
|
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ila tab3, _ovly_table - 16 # 0,2 32
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| 336 |
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#lnop
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| 337 |
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#nop
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| 338 |
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fsmbi pbyte, 0x100 # 1,4 33
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| 339 |
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#nop; lnop
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| 340 |
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#nop
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| 341 |
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lqx vma, tab3, off3 # 1,6 35
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| 342 |
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#nop; lnop
|
| 343 |
|
|
andi pbit, pbyte, 1 # 0,2 37
|
| 344 |
|
|
lnop
|
| 345 |
|
|
#nop; lnop
|
| 346 |
|
|
#nop; lnop
|
| 347 |
|
|
#nop; lnop
|
| 348 |
|
|
or newvma, vma, pbit # 0,2 41
|
| 349 |
|
|
rotqbyi buf3, vma, 12 # 1,4 41
|
| 350 |
|
|
#nop; lnop
|
| 351 |
|
|
#nop
|
| 352 |
|
|
stqx newvma, tab3, off3 # 1,6 43
|
| 353 |
|
|
#nop; lnop
|
| 354 |
|
|
shli off4, buf3, 2 # 1,4 45
|
| 355 |
|
|
#lnop
|
| 356 |
|
|
ila tab4, _ovly_buf_table - 4 # 0,2 46
|
| 357 |
|
|
#lnop
|
| 358 |
|
|
#nop; lnop
|
| 359 |
|
|
#nop; lnop
|
| 360 |
|
|
#nop
|
| 361 |
|
|
lqx map, tab4, off4 # 1,6 49
|
| 362 |
|
|
#nop
|
| 363 |
|
|
cwx genwi, tab4, off4 # 1,4 50
|
| 364 |
|
|
a addr4, tab4, off4 # 0,2 51
|
| 365 |
|
|
#lnop
|
| 366 |
|
|
#nop; lnop
|
| 367 |
|
|
#nop; lnop
|
| 368 |
|
|
#nop; lnop
|
| 369 |
|
|
#nop
|
| 370 |
|
|
rotqby oldovl, map, addr4 # 1,4 55
|
| 371 |
|
|
#nop
|
| 372 |
|
|
shufb newmap, newovl, map, genwi # 0,4 56
|
| 373 |
|
|
#if MFC_TAG_ID < 16
|
| 374 |
|
|
ila newmask, 1 << MFC_TAG_ID # 0,2 57
|
| 375 |
|
|
#else
|
| 376 |
|
|
ilhu newmask, 1 << (MFC_TAG_ID - 16) # 0,2 57
|
| 377 |
|
|
#endif
|
| 378 |
|
|
#lnop
|
| 379 |
|
|
#nop; lnop
|
| 380 |
|
|
#nop; lnop
|
| 381 |
|
|
stqd newmap, 0(addr4) # 1,6 60
|
| 382 |
|
|
|
| 383 |
|
|
/* Save app's tagmask, wait for DMA complete, restore mask. */
|
| 384 |
|
|
ila tagstat, MFC_TAG_UPDATE_ALL # 0,2 61
|
| 385 |
|
|
rdch oldmask, $MFC_RdTagMask # 1,6 61
|
| 386 |
|
|
#nop
|
| 387 |
|
|
wrch $MFC_WrTagMask, newmask # 1,6 62
|
| 388 |
|
|
#nop
|
| 389 |
|
|
wrch $MFC_WrTagUpdate, tagstat # 1,6 63
|
| 390 |
|
|
#nop
|
| 391 |
|
|
rdch tagstat, $MFC_RdTagStat # 1,6 64
|
| 392 |
|
|
#nop
|
| 393 |
|
|
sync # 1,4 65
|
| 394 |
|
|
/* Any hint prior to the sync is lost. A hint here allows the branch
|
| 395 |
|
|
to complete 15 cycles after the hint. With no hint the branch will
|
| 396 |
|
|
take 18 or 19 cycles. */
|
| 397 |
|
|
ila tab5, _ovly_table - 16 # 0,2 66
|
| 398 |
|
|
hbr do_load99, target # 1,15 66
|
| 399 |
|
|
shli off5, oldovl, 4 # 0,4 67
|
| 400 |
|
|
wrch $MFC_WrTagMask, oldmask # 1,6 67
|
| 401 |
|
|
ceqi zovl, oldovl, 0 # 0,2 68
|
| 402 |
|
|
#lnop
|
| 403 |
|
|
#nop; lnop
|
| 404 |
|
|
#nop
|
| 405 |
|
|
fsm zovl, zovl # 1,4 70
|
| 406 |
|
|
#nop
|
| 407 |
|
|
lqx oldvma, tab5, off5 # 1,6 71
|
| 408 |
|
|
#nop
|
| 409 |
|
|
lqd save3, -48($sp) # 1,6 72
|
| 410 |
|
|
#nop; lnop
|
| 411 |
|
|
andc pbit, pbit, zovl # 0,2 74
|
| 412 |
|
|
lqd save2, -32($sp) # 1,6 74
|
| 413 |
|
|
#nop; lnop
|
| 414 |
|
|
#nop; lnop
|
| 415 |
|
|
andc oldvma, oldvma, pbit # 0,2 77
|
| 416 |
|
|
lqd save1, -16($sp) # 1,6 77
|
| 417 |
|
|
#nop; lnop
|
| 418 |
|
|
nop
|
| 419 |
|
|
stqx oldvma, tab5, off5 # 1,6 79
|
| 420 |
|
|
#nop; lnop
|
| 421 |
|
|
|
| 422 |
|
|
.global _ovly_debug_event
|
| 423 |
|
|
.type _ovly_debug_event, @function
|
| 424 |
|
|
_ovly_debug_event:
|
| 425 |
|
|
nop
|
| 426 |
|
|
/* Branch to target address. */
|
| 427 |
|
|
do_load99:
|
| 428 |
|
|
bi target # 1,4 81
|
| 429 |
|
|
|
| 430 |
|
|
.size __ovly_load, . - __ovly_load
|
