# # Copyright (C) 2003-2004 Jakub Jermar # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # - Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # - Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # - The name of the author may not be used to endorse or promote products # derived from this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # #include .text .macro cp0_read reg mfc0 $2,\reg j $31 nop .endm .macro cp0_write reg mtc0 $4,\reg j $31 nop .endm .set noat .set noreorder .set nomacro .global cp0_index_read .global cp0_index_write .global cp0_random_read .global cp0_entry_lo0_read .global cp0_entry_lo0_write .global cp0_entry_lo1_read .global cp0_entry_lo1_write .global cp0_context_read .global cp0_context_write .global cp0_pagemask_read .global cp0_pagemask_write .global cp0_wired_read .global cp0_wired_write .global cp0_badvaddr_read .global cp0_count_read .global cp0_count_write .global cp0_entry_hi_read .global cp0_entry_hi_write .global cp0_compare_read .global cp0_compare_write .global cp0_status_read .global cp0_status_write .global cp0_cause_read .global cp0_cause_write .global cp0_epc_read .global cp0_epc_write .global cp0_prid_read cp0_index_read: cp0_read $0 cp0_index_write: cp0_write $0 cp0_random_read: cp0_read $1 cp0_entry_lo0_read: cp0_read $2 cp0_entry_lo0_write: cp0_write $2 cp0_entry_lo1_read: cp0_read $3 cp0_entry_lo1_write: cp0_write $3 cp0_context_read: cp0_read $4 cp0_context_write: cp0_write $4 cp0_pagemask_read: cp0_read $5 cp0_pagemask_write: cp0_write $5 cp0_wired_read: cp0_read $6 cp0_wired_write: cp0_write $6 cp0_badvaddr_read: cp0_read $8 cp0_count_read: cp0_read $9 cp0_count_write: cp0_write $9 cp0_entry_hi_read: cp0_read $10 cp0_entry_hi_write: cp0_write $10 cp0_compare_read: cp0_read $11 cp0_compare_write: cp0_write $11 cp0_status_read: cp0_read $12 cp0_status_write: cp0_write $12 cp0_cause_read: cp0_read $13 cp0_cause_write: cp0_write $13 cp0_epc_read: cp0_read $14 cp0_epc_write: cp0_write $14 cp0_prid_read: cp0_read $15 .global cpu_halt cpu_halt: j cpu_halt nop .global memsetb memsetb: j _memsetb nop .global memcpy memcpy: j _memcpy nop .macro fpu_gp_save reg ctx mfc1 $t0,$\reg sw $t0, \reg*4(\ctx) .endm .macro fpu_gp_restore reg ctx lw $t0, \reg*4(\ctx) mtc1 $t0,$\reg .endm .macro fpu_ct_save reg ctx cfc1 $t0,$1 sw $t0, (\reg+32)*4(\ctx) .endm .macro fpu_ct_restore reg ctx lw $t0, (\reg+32)*4(\ctx) ctc1 $t0,$\reg .endm .global fpu_context_save fpu_context_save: #ifdef HAVE_FPU fpu_gp_save 0,$a0 fpu_gp_save 1,$a0 fpu_gp_save 2,$a0 fpu_gp_save 3,$a0 fpu_gp_save 4,$a0 fpu_gp_save 5,$a0 fpu_gp_save 6,$a0 fpu_gp_save 7,$a0 fpu_gp_save 8,$a0 fpu_gp_save 9,$a0 fpu_gp_save 10,$a0 fpu_gp_save 11,$a0 fpu_gp_save 12,$a0 fpu_gp_save 13,$a0 fpu_gp_save 14,$a0 fpu_gp_save 15,$a0 fpu_gp_save 16,$a0 fpu_gp_save 17,$a0 fpu_gp_save 18,$a0 fpu_gp_save 19,$a0 fpu_gp_save 20,$a0 fpu_gp_save 21,$a0 fpu_gp_save 22,$a0 fpu_gp_save 23,$a0 fpu_gp_save 24,$a0 fpu_gp_save 25,$a0 fpu_gp_save 26,$a0 fpu_gp_save 27,$a0 fpu_gp_save 28,$a0 fpu_gp_save 29,$a0 fpu_gp_save 30,$a0 fpu_gp_save 31,$a0 fpu_ct_save 1,$a0 fpu_ct_save 2,$a0 fpu_ct_save 3,$a0 fpu_ct_save 4,$a0 fpu_ct_save 5,$a0 fpu_ct_save 6,$a0 fpu_ct_save 7,$a0 fpu_ct_save 8,$a0 fpu_ct_save 9,$a0 fpu_ct_save 10,$a0 fpu_ct_save 11,$a0 fpu_ct_save 12,$a0 fpu_ct_save 13,$a0 fpu_ct_save 14,$a0 fpu_ct_save 15,$a0 fpu_ct_save 16,$a0 fpu_ct_save 17,$a0 fpu_ct_save 18,$a0 fpu_ct_save 19,$a0 fpu_ct_save 20,$a0 fpu_ct_save 21,$a0 fpu_ct_save 22,$a0 fpu_ct_save 23,$a0 fpu_ct_save 24,$a0 fpu_ct_save 25,$a0 fpu_ct_save 26,$a0 fpu_ct_save 27,$a0 fpu_ct_save 28,$a0 fpu_ct_save 29,$a0 fpu_ct_save 30,$a0 fpu_ct_save 31,$a0 #endif j $ra nop .global fpu_context_restore fpu_context_restore: #ifdef HAVE_FPU fpu_gp_restore 0,$a0 fpu_gp_restore 1,$a0 fpu_gp_restore 2,$a0 fpu_gp_restore 3,$a0 fpu_gp_restore 4,$a0 fpu_gp_restore 5,$a0 fpu_gp_restore 6,$a0 fpu_gp_restore 7,$a0 fpu_gp_restore 8,$a0 fpu_gp_restore 9,$a0 fpu_gp_restore 10,$a0 fpu_gp_restore 11,$a0 fpu_gp_restore 12,$a0 fpu_gp_restore 13,$a0 fpu_gp_restore 14,$a0 fpu_gp_restore 15,$a0 fpu_gp_restore 16,$a0 fpu_gp_restore 17,$a0 fpu_gp_restore 18,$a0 fpu_gp_restore 19,$a0 fpu_gp_restore 20,$a0 fpu_gp_restore 21,$a0 fpu_gp_restore 22,$a0 fpu_gp_restore 23,$a0 fpu_gp_restore 24,$a0 fpu_gp_restore 25,$a0 fpu_gp_restore 26,$a0 fpu_gp_restore 27,$a0 fpu_gp_restore 28,$a0 fpu_gp_restore 29,$a0 fpu_gp_restore 30,$a0 fpu_gp_restore 31,$a0 fpu_ct_restore 1,$a0 fpu_ct_restore 2,$a0 fpu_ct_restore 3,$a0 fpu_ct_restore 4,$a0 fpu_ct_restore 5,$a0 fpu_ct_restore 6,$a0 fpu_ct_restore 7,$a0 fpu_ct_restore 8,$a0 fpu_ct_restore 9,$a0 fpu_ct_restore 10,$a0 fpu_ct_restore 11,$a0 fpu_ct_restore 12,$a0 fpu_ct_restore 13,$a0 fpu_ct_restore 14,$a0 fpu_ct_restore 15,$a0 fpu_ct_restore 16,$a0 fpu_ct_restore 17,$a0 fpu_ct_restore 18,$a0 fpu_ct_restore 19,$a0 fpu_ct_restore 20,$a0 fpu_ct_restore 21,$a0 fpu_ct_restore 22,$a0 fpu_ct_restore 23,$a0 fpu_ct_restore 24,$a0 fpu_ct_restore 25,$a0 fpu_ct_restore 26,$a0 fpu_ct_restore 27,$a0 fpu_ct_restore 28,$a0 fpu_ct_restore 29,$a0 fpu_ct_restore 30,$a0 fpu_ct_restore 31,$a0 #endif j $ra nop # THIS IS USERSPACE CODE .global utext utext: j $31 nop utext_end: .data .global utext_size utext_size: .long utext_end-utext