| /SPARTAN/trunk/arch/mips/src/exception.c |
|---|
| 0,0 → 1,126 |
| /* |
| * Copyright (C) 2001-2004 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 <arch/exception.h> |
| #include <arch/interrupt.h> |
| #include <panic.h> |
| #include <arch/cp0.h> |
| #include <arch/types.h> |
| #include <arch.h> |
| #include <debug.h> |
| void exception(void) |
| { |
| int excno; |
| __u32 epc; |
| __u32 epc_shift = 0; |
| pri_t pri; |
| ASSERT(CPU != NULL); |
| /* |
| * NOTE ON OPERATION ORDERING |
| * |
| * On entry, cpu_priority_high() must be called before exception bit is cleared. |
| * On exit, exception bit must be set before cpu_priority_restore() is called. |
| */ |
| pri = cpu_priority_high(); |
| epc = cp0_epc_read(); |
| cp0_status_write(cp0_status_read() & ~ cp0_status_exl_exception_bit); |
| if (THREAD) { |
| THREAD->saved_pri = pri; |
| THREAD->saved_epc = epc; |
| } |
| /* decode exception number and process the exception */ |
| switch (excno = (cp0_cause_read() >> 2) & 0x1f) { |
| case EXC_Int: |
| interrupt(); |
| break; |
| case EXC_TLBL: |
| case EXC_TLBS: |
| tlb_invalid(); |
| break; |
| case EXC_Mod: |
| panic("unhandled TLB Modification Exception\n"); |
| break; |
| case EXC_AdEL: |
| panic("unhandled Address Error Exception - load or instruction fetch\n"); |
| break; |
| case EXC_AdES: |
| panic("unhandled Address Error Exception - store\n"); |
| break; |
| case EXC_IBE: |
| panic("unhandled Bus Error Exception - fetch instruction\n"); |
| break; |
| case EXC_DBE: |
| panic("unhandled Bus Error Exception - data reference: load or store\n"); |
| break; |
| case EXC_Bp: |
| /* it is necessary to not re-execute BREAK instruction after returning from Exception handler |
| (see page 138 in R4000 Manual for more information) */ |
| epc_shift = 4; |
| break; |
| case EXC_RI: |
| panic("unhandled Reserved Instruction Exception\n"); |
| break; |
| case EXC_CpU: |
| panic("unhandled Coprocessor Unusable Exception\n"); |
| break; |
| case EXC_Ov: |
| panic("unhandled Arithmetic Overflow Exception\n"); |
| break; |
| case EXC_Tr: |
| panic("unhandled Trap Exception\n"); |
| break; |
| case EXC_VCEI: |
| panic("unhandled Virtual Coherency Exception - instruction\n"); |
| break; |
| case EXC_FPE: |
| panic("unhandled Floating-Point Exception\n"); |
| break; |
| case EXC_WATCH: |
| panic("unhandled reference to WatchHi/WatchLo address\n"); |
| break; |
| case EXC_VCED: |
| panic("unhandled Virtual Coherency Exception - data\n"); |
| break; |
| default: |
| panic("unhandled exception %d\n", excno); |
| } |
| if (THREAD) { |
| pri = THREAD->saved_pri; |
| epc = THREAD->saved_epc; |
| } |
| cp0_epc_write(epc + epc_shift); |
| cp0_status_write(cp0_status_read() | cp0_status_exl_exception_bit); |
| cpu_priority_restore(pri); |
| } |
| /SPARTAN/trunk/arch/mips/src/putchar.c |
|---|
| 0,0 → 1,42 |
| /* |
| * Copyright (C) 2001-2004 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 <putchar.h> |
| #include <arch/types.h> |
| #include <arch/cp0.h> |
| #define VIDEORAM 0xB0000000 |
| void putchar(const char ch) |
| { |
| // __u32 status = cp0_status_read(); |
| // cp0_status_write(cp0_status_read() | cp0_status_erl_error_bit); |
| *((char *) VIDEORAM) = ch; |
| // cp0_status_write(status); |
| } |
| /SPARTAN/trunk/arch/mips/src/asm.s |
|---|
| 0,0 → 1,169 |
| # |
| # Copyright (C) 2001-2004 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. |
| # |
| .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_hi_read |
| .global cp0_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 tlbp |
| tlbp: |
| tlbp |
| j $31 |
| nop |
| .global tlbr |
| tlbr: |
| tlbr |
| j $31 |
| nop |
| .global tlbwi |
| tlbwi: |
| tlbwi |
| j $31 |
| nop |
| .global tlbwr |
| tlbwr: |
| tlbwr |
| j $31 |
| nop |
| .global cpu_halt |
| cpu_halt: |
| j cpu_halt |
| nop |
| .global memsetb |
| memsetb: |
| j _memsetb |
| nop |
| .global memcpy |
| memcpy: |
| j _memcpy |
| nop |
| # THIS IS USERSPACE CODE |
| .global utext |
| utext: |
| j $31 |
| nop |
| utext_end: |
| .data |
| .global utext_size |
| utext_size: |
| .long utext_end-utext |
| /SPARTAN/trunk/arch/mips/src/cpu/cpu.c |
|---|
| 0,0 → 1,95 |
| /* |
| * Copyright (C) 2001-2004 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 <arch/cpu.h> |
| #include <cpu.h> |
| #include <arch.h> |
| #include <arch/cp0.h> |
| #include <typedefs.h> |
| #include <print.h> |
| struct { |
| char *vendor; |
| char *model; |
| } imp_data[] = { |
| { "Invalid", "Invalid" }, /* 0x00 */ |
| { "MIPS", "R2000" }, /* 0x01 */ |
| { "MIPS", "R3000" }, /* 0x02 */ |
| { "MIPS", "R6000" }, /* 0x03 */ |
| { "MIPS", " R4000/R4400" }, /* 0x04 */ |
| { "LSI Logic", "R3000" }, /* 0x05 */ |
| { "MIPS", "R6000A" }, /* 0x06 */ |
| { "IDT", "3051/3052" }, /* 0x07 */ |
| { "Invalid", "Invalid" }, /* 0x08 */ |
| { "MIPS", "R10000/T5" }, /* 0x09 */ |
| { "MIPS", "R4200" }, /* 0x0a */ |
| { "Unknown", "Unknown" }, /* 0x0b */ |
| { "Unknown", "Unknown" }, /* 0x0c */ |
| { "Invalid", "Invalid" }, /* 0x0d */ |
| { "Invalid", "Invalid" }, /* 0x0e */ |
| { "Invalid", "Invalid" }, /* 0x0f */ |
| { "MIPS", "R8000" }, /* 0x10 */ |
| { "Invalid", "Invalid" }, /* 0x11 */ |
| { "Invalid", "Invalid" }, /* 0x12 */ |
| { "Invalid", "Invalid" }, /* 0x13 */ |
| { "Invalid", "Invalid" }, /* 0x14 */ |
| { "Invalid", "Invalid" }, /* 0x15 */ |
| { "Invalid", "Invalid" }, /* 0x16 */ |
| { "Invalid", "Invalid" }, /* 0x17 */ |
| { "Invalid", "Invalid" }, /* 0x18 */ |
| { "Invalid", "Invalid" }, /* 0x19 */ |
| { "Invalid", "Invalid" }, /* 0x1a */ |
| { "Invalid", "Invalid" }, /* 0x1b */ |
| { "Invalid", "Invalid" }, /* 0x1c */ |
| { "Invalid", "Invalid" }, /* 0x1d */ |
| { "Invalid", "Invalid" }, /* 0x1e */ |
| { "Invalid", "Invalid" }, /* 0x1f */ |
| { "QED", "R4600" }, /* 0x20 */ |
| { "Sony", "R3000" }, /* 0x21 */ |
| { "Toshiba", "R3000" }, /* 0x22 */ |
| { "NKK", "R3000" } /* 0x23 */ |
| }; |
| void cpu_arch_init(void) |
| { |
| } |
| void cpu_identify(void) |
| { |
| CPU->arch.rev_num = cp0_prid_read() & 0xff; |
| CPU->arch.imp_num = (cp0_prid_read() >> 8) & 0xff; |
| } |
| void cpu_print_report(cpu_t *m) |
| { |
| printf("cpu%d: %s %s (rev=%d.%d, imp=%d)\n", |
| m->id, imp_data[m->arch.imp_num].vendor, imp_data[m->arch.imp_num].model, m->arch.rev_num >> 4, m->arch.rev_num & 0xf, m->arch.imp_num); |
| } |
| /SPARTAN/trunk/arch/mips/src/mm/tlb.c |
|---|
| 0,0 → 1,69 |
| /* |
| * Copyright (C) 2001-2004 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 <arch/mm/tlb.h> |
| #include <arch/mm/asid.h> |
| #include <mm/tlb.h> |
| #include <arch/cp0.h> |
| #include <panic.h> |
| #include <arch.h> |
| void main_bsp(void); |
| int bootstrap = 1; |
| void tlb_refill(void) |
| { |
| if (bootstrap) { |
| bootstrap = 0; |
| main_bsp(); |
| } |
| panic("tlb_refill exception\n"); |
| } |
| void tlb_invalid(void) |
| { |
| panic("%X: TLB exception at %X", cp0_badvaddr_read(), THREAD ? THREAD->saved_epc : 0); |
| } |
| void tlb_invalidate(int asid) |
| { |
| pri_t pri; |
| pri = cpu_priority_high(); |
| asid_bitmap_reset(); |
| // TODO |
| cpu_priority_restore(pri); |
| } |
| /SPARTAN/trunk/arch/mips/src/mm/page.c |
|---|
| 0,0 → 1,46 |
| /* |
| * Copyright (C) 2001-2004 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 <arch/types.h> |
| #include <arch/mm/page.h> |
| #include <arch/mm/frame.h> |
| #include <mm/frame.h> |
| #include <mm/page.h> |
| #include <memstr.h> |
| pte_t *PTL0 = NULL; |
| void page_arch_init(void) |
| { |
| __address ptl0; |
| ptl0 = frame_alloc(FRAME_KA | FRAME_PANIC); |
| memsetb(ptl0, FRAME_SIZE, 0); |
| SET_PTL0_ADDRESS(KA2PA(ptl0)); |
| } |
| /SPARTAN/trunk/arch/mips/src/mm/asid.c |
|---|
| 0,0 → 1,56 |
| /* |
| * Copyright (C) 2005 Martin Decky |
| * 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 <arch.h> |
| #include <memstr.h> |
| /**< Array of threads that have currently some ASID assigned, |
| NULL means no thread have ASID with number of that index assigned */ |
| struct thread * asids[256]; |
| int last_asid; /**< The number of last assigned ASID */ |
| int asid_bitmap[32]; /**< Bitmap of ASIDs currently in TLB */ |
| /** Cleanup asid_bitmap |
| * |
| */ |
| void asid_bitmap_reset(void) |
| { |
| memsetb(asid_bitmap, sizeof(asid_bitmap), 0); |
| } |
| /** Initialize manipulating with ASIDs |
| * |
| */ |
| void init_asids(void) |
| { |
| memsetb(asids, sizeof(asids), 0); |
| asid_bitmap_reset(); |
| last_asid = 0; |
| } |
| /SPARTAN/trunk/arch/mips/src/mm/frame.c |
|---|
| 0,0 → 1,34 |
| /* |
| * Copyright (C) 2005 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 <arch/mm/frame.h> |
| #include <mm/frame.h> |
| void frame_arch_init(void) |
| { |
| } |
| /SPARTAN/trunk/arch/mips/src/dummy.s |
|---|
| 0,0 → 1,45 |
| # |
| # Copyright (C) 2001-2004 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. |
| # |
| .text |
| .set noat |
| .global calibrate_delay_loop |
| .global asm_delay_loop |
| .global userspace |
| .global before_thread_runs_arch |
| .global dummy |
| before_thread_runs_arch: |
| userspace: |
| calibrate_delay_loop: |
| asm_delay_loop: |
| dummy: |
| j $31 |
| nop |
| /SPARTAN/trunk/arch/mips/src/mips.c |
|---|
| 0,0 → 1,59 |
| /* |
| * Copyright (C) 2001-2004 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 <arch.h> |
| #include <arch/cp0.h> |
| #include <arch/exception.h> |
| void arch_pre_mm_init(void) |
| { |
| /* |
| * Switch to BEV normal level so that exception vectors point to the kernel. |
| * Clear the error level. |
| */ |
| cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit)); |
| /* |
| * Unmask hardware clock interrupt. |
| */ |
| cp0_status_write(cp0_status_read() | (1<<cp0_status_im7_shift)); |
| /* |
| * Start hardware clock. |
| */ |
| cp0_compare_write(cp0_compare_value); |
| cp0_count_write(0); |
| } |
| void arch_post_mm_init(void) |
| { |
| } |
| void arch_late_init(void) |
| { |
| } |
| /SPARTAN/trunk/arch/mips/src/interrupt.c |
|---|
| 0,0 → 1,95 |
| /* |
| * Copyright (C) 2001-2004 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 <arch/interrupt.h> |
| #include <arch/types.h> |
| #include <arch.h> |
| #include <arch/cp0.h> |
| #include <time/clock.h> |
| #include <panic.h> |
| pri_t cpu_priority_high(void) |
| { |
| pri_t pri = (pri_t) cp0_status_read(); |
| cp0_status_write(pri & ~cp0_status_ie_enabled_bit); |
| return pri; |
| } |
| pri_t cpu_priority_low(void) |
| { |
| pri_t pri = (pri_t) cp0_status_read(); |
| cp0_status_write(pri | cp0_status_ie_enabled_bit); |
| return pri; |
| } |
| void cpu_priority_restore(pri_t pri) |
| { |
| cp0_status_write(cp0_status_read() | (pri & cp0_status_ie_enabled_bit)); |
| } |
| pri_t cpu_priority_read(void) |
| { |
| return cp0_status_read(); |
| } |
| void interrupt(void) |
| { |
| __u32 cause; |
| int i; |
| /* decode interrupt number and process the interrupt */ |
| cause = (cp0_cause_read() >> 8) &0xff; |
| for (i = 0; i < 8; i++) { |
| if (cause & (1 << i)) { |
| switch (i) { |
| case 0: /* SW0 - Software interrupt 0 */ |
| cp0_cause_write(cause & ~(1 << 8)); /* clear SW0 interrupt */ |
| break; |
| case 1: /* SW1 - Software interrupt 1 */ |
| cp0_cause_write(cause & ~(1 << 9)); /* clear SW1 interrupt */ |
| break; |
| case 2: /* IRQ0 */ |
| case 3: /* IRQ1 */ |
| case 4: /* IRQ2 */ |
| case 5: /* IRQ3 */ |
| case 6: /* IRQ4 */ |
| panic("unhandled interrupt %d\n", i); |
| break; |
| case 7: /* Timer Interrupt */ |
| cp0_compare_write(cp0_compare_value); /* clear timer interrupt */ |
| /* start counting over again */ |
| cp0_count_write(0); |
| clock(); |
| break; |
| } |
| } |
| } |
| } |
| /SPARTAN/trunk/arch/mips/src/start.S |
|---|
| 0,0 → 1,91 |
| # |
| # Copyright (C) 2001-2004 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 <arch/asm/macro.h> |
| #define STACK_SPACE 128 |
| .text |
| .set noat |
| .set noreorder |
| .set nomacro |
| .global kernel_image_start |
| .global tlb_refill_entry |
| .global cache_error_entry |
| .global exception_entry |
| .org 0x0 |
| kernel_image_start: |
| tlb_refill_entry: |
| j tlb_refill_handler |
| nop |
| .org 0x100 |
| cache_error_entry: |
| j cache_error_handler |
| nop |
| .org 0x180 |
| exception_entry: |
| exception_handler: |
| sub $29, STACK_SPACE |
| REGISTERS_STORE $29 |
| jal exception |
| nop |
| REGISTERS_LOAD $29 |
| add $29, STACK_SPACE |
| eret |
| tlb_refill_handler: |
| sub $29, STACK_SPACE |
| REGISTERS_STORE $29 |
| jal tlb_refill |
| nop |
| REGISTERS_LOAD $29 |
| add $29, STACK_SPACE |
| eret |
| cache_error_handler: |
| sub $29, STACK_SPACE |
| REGISTERS_STORE $29 |
| jal cache_error |
| nop |
| REGISTERS_LOAD $29 |
| add $29, STACK_SPACE |
| eret |
| /SPARTAN/trunk/arch/mips/src/fpu_context.c |
|---|
| 0,0 → 1,48 |
| /* |
| * Copyright (C) 2005 Jakub Vana |
| * 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 <fpu_context.h> |
| void fpu_context_save(fpu_context_t *fctx) |
| { |
| } |
| void fpu_context_restore(fpu_context_t *fctx) |
| { |
| } |
| void fpu_lazy_context_save(fpu_context_t *fctx) |
| { |
| } |
| void fpu_lazy_context_restore(fpu_context_t *fctx) |
| { |
| } |
| /SPARTAN/trunk/arch/mips/src/cache.c |
|---|
| 0,0 → 1,35 |
| /* |
| * Copyright (C) 2001-2004 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 <arch/cache.h> |
| #include <panic.h> |
| void cache_error(void) |
| { |
| panic("cache_error exception\n"); |
| } |
| /SPARTAN/trunk/arch/mips/src/panic.s |
|---|
| 0,0 → 1,42 |
| # |
| # Copyright (C) 2001-2004 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. |
| # |
| .text |
| .set noat |
| .set noreorder |
| .set nomacro |
| .global panic_printf |
| panic_printf: |
| jal printf |
| nop |
| j cpu_halt |
| nop |
| /SPARTAN/trunk/arch/mips/src/context.S |
|---|
| 0,0 → 1,52 |
| # |
| # Copyright (C) 2001-2004 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 <arch/asm/macro.h> |
| .text |
| .set noat |
| .set noreorder |
| .set nomacro |
| .global context_save |
| .global context_restore |
| context_save: |
| REGISTERS_STORE $4 |
| # context_save returns 1 |
| j $31 |
| li $2, 1 |
| context_restore: |
| REGISTERS_LOAD $4 |
| # context_restore returns 0 |
| j $31 |
| xor $2, $2 |