/*
Exception test.
The following list outlines the tests performed
Execption test
- 0x100 reset - start addr after reset
- 0x200 bus error - unimplemented addr is accessed
- 0x300 data page fault - NOT tested here
- 0x400 instruction page fault - NOT tested here
- 0x500 tick timer - NOT tested here
- 0x600 alignment - write to unaligned addr
- 0x700 illegal instruction - use unimplemented inst. l.div
- 0x800 external interrupt - int triggered from wb slave
- 0x900 d-tlb miss - translation tests
- 0xA00 i-tlb miss - NOT tested here
- 0xB00 range - NOT tested here
- 0xC00 system call - NOT tested here
- 0xD00 floating point - NOT tested here
- 0xE00 trap - NOT tested here
- 0xF00 RESERVED
r11 - 1st exception counter incremented inside exception
r12 - 2nd exception counter incremented outside and rigth after
exception
... other register use to be documented...
Julius Baxter, julius@opencores.org
Tadej Markovic, tadej@opencores.org
*/
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2010 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
#include "spr-defs.h"
#include "board.h"
#include "or1200-defines.h"
/* =================================================== [ exceptions ] === */
.section .vectors, "ax"
/* ---[ 0x100: RESET exception ]----------------------------------------- */
.org 0x100
l.movhi r0, 0
/* Clear status register */
l.ori r1, r0, SPR_SR_SM
l.mtspr r0, r1, SPR_SR
/* Clear timer */
l.mtspr r0, r0, SPR_TTMR
/* Init the stack */
.global stack
l.movhi r1, hi(stack)
l.ori r1, r1, lo(stack)
l.addi r2, r0, -3
l.and r1, r1, r2
/* Jump to program initialisation code */
.global _start
l.movhi r4, hi(_start)
l.ori r4, r4, lo(_start)
l.jr r4
l.nop
/* ---[ 0x200: BUS error ]------------------------------------------------ */
.org 0x200
.global _bus_handler
_bus_handler:
l.mfspr r3,r0,SPR_EPCR_BASE /* Get EPC */
l.nop 2
l.mfspr r3,r0,SPR_EEAR_BASE /* Get EEA */
l.nop 2
l.addi r11,r11,1 /* Increment 1st exception counter */
l.sfeqi r30, 0xd /* Is this a data bus test, if so return with l.rfe */
l.bf 1f
l.movhi r5, 0 /* r5 should be the one causing the error on dbus */
/* Instruction bus error test return */
l.movhi r5, hi(0x44004800) /* Put "l.jr r9" instruction in r5 */
l.ori r5, r5, lo(0x44004800)
l.sw 0x0(r0), r5 /* Write "l.j r9" to address 0x0 in RAM */
l.movhi r5,0x1500 /* Put a "l.nop" instruction in r5 */
l.sw 0x4(r0),r5 /* Write l.nop instruction to RAM addr 0x4 */
l.mtspr r0,r0,SPR_ICBIR /* Invalidate line 0 of cache */
l.mtspr r0,r0,SPR_EPCR_BASE /* RFE to 0x0, which is l.jr r9 */
1: l.rfe
/* ---[ 0x600: ALIGN error ]------------------------------------------------ */
.org 0x600
.global _align_handler
_align_handler:
l.mfspr r3,r0,SPR_EPCR_BASE /* Get EPC */
l.nop 2
l.addi r11,r11,1 /* Increment 1st exception counter */
l.movhi r5,0 /* Clear the pointer register */
l.rfe
/* ---[ 0x700: ILLEGAL INSN exception ]------------------------------------- */
.org 0x700
.global _illinsn_handler
_illinsn_handler:
l.mfspr r3,r0,SPR_EPCR_BASE /* Get EPC */
l.nop 2
l.addi r11,r11,1 /* Increment 1st exception counter */
/* Delay slot test needs this instruction "fixed" */
l.movhi r5,0x1500 /* Put a "l.nop" instruction in r5 */
l.sw 0x4(r0),r5 /* Write l.nop instruction to RAM addr 0x4 */
l.mtspr r0,r0,SPR_ICBIR /* Invalidate line 0 of cache */
l.mtspr r0,r0,SPR_EPCR_BASE /* Jump to 0, which is l.jr r9 */
l.rfe
/* ---[ 0x900: DTLB exception ]--------------------------------------------- */
.org 0x900
.global _dtlb_handler
/* Exception handler - DMMU TLB miss */
/* Assume 64-entry TLB cache */
_dtlb_handler:
l.mfspr r20, r0, SPR_EEAR_BASE
/* Find the entry/set for this address */
l.srli r21, r20, 13 /* r21 = VPN, shift by size 8192 = 2**13 */
l.andi r22, r21, 0x3f /* 64 entries = 6 bit mask, r22 = set number */
/* If page is in the 0xc0000000 space we map to 16MB part of
memory, ie 0x0 => 0x01000000, otherwise 1-1 mapping */
l.movhi r23, hi(0xc0000000)
l.ori r23, r23, lo(0xc0000000)
l.srli r23, r23, 13 /* Get page address, shift by page size, 13 bits */
l.movhi r24, hi(0xff << 11) /* Mask for top byte of VPN */
l.ori r24, r24, lo(0xff << 11)
l.and r24, r24, r21 /* Mask in only top byte of VPN */
l.sfeq r23, r24 /* Decide if it's in our special mapped region or not*/
/* First, Setup value for DTLBM (match) reg, is same for both cases */
l.movhi r24, hi(SPR_ITLBMR_VPN) /* VPN mask into r24 */
l.ori r24, r24, lo(SPR_ITLBMR_VPN)
l.and r25, r20, r24 /* AND address with VPN mask */
l.ori r25, r25, SPR_DTLBMR_V /* OR in valid bit */
l.mtspr r22, r25, SPR_DTLBMR_BASE(0) /* Write to DTLBR register */
l.bf _highmem_map
l.nop
_lomem_map:
/* Do 1:1 mapping for this request */
/* Setup value for translate register */
l.movhi r24, hi(SPR_ITLBTR_PPN) /* PPN mask into r24 */
l.ori r24, r24, lo(SPR_ITLBTR_PPN)
l.and r25, r20, r24 /* AND address with PPN mask */
l.ori r25, r25, DTLB_PR_NOLIMIT /* Set all execute enables, no lims. */
l.mtspr r22, r25, SPR_DTLBTR_BASE(0) /* Write to DTLTR register */
l.j _dtlb_done
l.addi r18, r18, 1 /* Incremement low-mapping counter */
_highmem_map:
/* Do top byte, 0xc0->0x01, mapping for this request */
/* Setup value for translate register */
l.movhi r24, hi(SPR_ITLBTR_PPN) /* PPN mask into r24 */
l.ori r24, r24, lo(SPR_ITLBTR_PPN)
l.and r25, r20, r24 /* AND address with PPN mask */
l.movhi r26, hi(0xff000000) /* Top byte address mask */
l.or r25, r26, r25 /* Set top byte to 0xff */
l.xor r25, r26, r25 /* Now clear top byte with XOR */
l.movhi r26, hi(0x01000000) /* Top address byte */
l.or r25, r26, r25 /* Set top address byte */
l.ori r25, r25, DTLB_PR_NOLIMIT /* Set all execute enables, no lims. */
l.mtspr r22, r25, SPR_DTLBTR_BASE(0) /* Write to DTLTR register */
l.addi r19, r19, 1 /* Incremement low-mapping counter */
_dtlb_done:
l.rfe
/* =================================================== [ text section ] === */
.section .text
/* =================================================== [ start ] === */
.global _start
_start:
/* Instruction cache enable */
/* Check if IC present and skip enabling otherwise */
l.mfspr r24,r0,SPR_UPR
l.andi r26,r24,SPR_UPR_ICP
l.sfeq r26,r0
l.bf .L8
l.nop
/* Disable IC */
l.mfspr r6,r0,SPR_SR
l.addi r5,r0,-1
l.xori r5,r5,SPR_SR_ICE
l.and r5,r6,r5
l.mtspr r0,r5,SPR_SR
/* Establish cache block size
If BS=0, 16;
If BS=1, 32;
r14 contain block size
*/
l.mfspr r24,r0,SPR_ICCFGR
l.andi r26,r24,SPR_ICCFGR_CBS
l.srli r28,r26,7
l.ori r30,r0,16
l.sll r14,r30,r28
/* Establish number of cache sets
r16 contains number of cache sets
r28 contains log(# of cache sets)
*/
l.andi r26,r24,SPR_ICCFGR_NCS
l.srli r28,r26,3
l.ori r30,r0,1
l.sll r16,r30,r28
/* Invalidate IC */
l.addi r6,r0,0
l.sll r5,r14,r28
.L7:
l.mtspr r0,r6,SPR_ICBIR
l.sfne r6,r5
l.bf .L7
l.add r6,r6,r14
/* Enable IC */
l.mfspr r6,r0,SPR_SR
l.ori r6,r6,SPR_SR_ICE
l.mtspr r0,r6,SPR_SR
l.nop
l.nop
l.nop
l.nop
l.nop
l.nop
l.nop
l.nop
.L8:
/* Data cache enable */
/* Check if DC present and skip enabling otherwise */
l.mfspr r24,r0,SPR_UPR
l.andi r26,r24,SPR_UPR_DCP
l.sfeq r26,r0
l.bf .L10
l.nop
/* Disable DC */
l.mfspr r6,r0,SPR_SR
l.addi r5,r0,-1
l.xori r5,r5,SPR_SR_DCE
l.and r5,r6,r5
l.mtspr r0,r5,SPR_SR
/* Establish cache block size
If BS=0, 16;
If BS=1, 32;
r14 contain block size
*/
l.mfspr r24,r0,SPR_DCCFGR
l.andi r26,r24,SPR_DCCFGR_CBS
l.srli r28,r26,7
l.ori r30,r0,16
l.sll r14,r30,r28
/* Establish number of cache sets
r16 contains number of cache sets
r28 contains log(# of cache sets)
*/
l.andi r26,r24,SPR_DCCFGR_NCS
l.srli r28,r26,3
l.ori r30,r0,1
l.sll r16,r30,r28
/* Invalidate DC */
l.addi r6,r0,0
l.sll r5,r14,r28
.L9:
l.mtspr r0,r6,SPR_DCBIR
l.sfne r6,r5
l.bf .L9
l.add r6,r6,r14
/* Enable DC */
l.mfspr r6,r0,SPR_SR
l.ori r6,r6,SPR_SR_DCE
l.mtspr r0,r6,SPR_SR
.L10:
// Kick off test
l.jal _main
l.nop
/* ========================================================= [ main ] === */
.global _main
.global _dmmu_invalidate
.global _dmmu_except1
_main:
l.nop
l.addi r3,r0,0
l.addi r5,r0,0
l.addi r11,r0,0 /* exception counter 1 */
l.addi r12,r0,0 /* exception counter 2 */
l.addi r13,r0,0
l.addi r18,r0,0 /* DMMU exception counter for low mem mapping */
l.addi r19,r0,0 /* DMMU exception counter for hi mem mapping */
l.sw 0x0(r0),r0 /* Initialize RAM */
l.sw 0x4(r0),r0 /* Initialize RAM */
l.sw 0x8(r0),r0 /* Initialize RAM */
l.sw 0xc(r0),r0 /* Initialize RAM */
l.sw 0x10(r0),r0 /* Initialize RAM */
l.sw 0x14(r0),r0 /* Initialize RAM */
l.sw 0x18(r0),r0 /* Initialize RAM */
l.sw 0x1c(r0),r0 /* Initialize RAM */
l.sw 0x20(r0),r0 /* Initialize RAM */
l.sw 0x24(r0),r0 /* Initialize RAM */
l.sw 0x28(r0),r0 /* Initialize RAM */
l.sw 0x2c(r0),r0 /* Initialize RAM */
l.sw 0x30(r0),r0 /* Initialize RAM */
l.sw 0x34(r0),r0 /* Initialize RAM */
l.sw 0x38(r0),r0 /* Initialize RAM */
l.sw 0x3c(r0),r0 /* Initialize RAM */
l.sw 0x40(r0),r0 /* Initialize RAM */
l.sw 0x44(r0),r0 /* Initialize RAM */
l.sw 0x48(r0),r0 /* Initialize RAM */
l.sw 0x4c(r0),r0 /* Initialize RAM */
l.j _align1
//l.j _dmmu_except1
l.nop
/* Exceptions followed by NOPs */
/* SW alignment exception */
_align1:
l.movhi r11,0
l.nop
/* Test l.sh */
l.ori r5,r0,0x1 /* Half-word access, offset 1 */
l.sh 0x0(r5),r0
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Half-word access, offset 3 */
l.sh 0x0(r5),r0
l.addi r12,r12,1 /* Increment 2nd exception counter */
/* Test l.lhz */
l.ori r5,r0,0x1 /* Half-word access, offset 1 */
l.lhz r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Half-word access, offset 3 */
l.lhz r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
/* Test l.lhs */
l.ori r5,r0,0x1 /* Half-word access, offset 1 */
l.lhs r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Half-word access, offset 3 */
l.lhs r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
/* Test l.sw */
l.ori r5,r0,0x1 /* Word access, offset 1 */
l.sw 0x0(r5), r0
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x2 /* Word access, offset 2 */
l.sw 0x0(r5), r0
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Word access, offset 3 */
l.sw 0x0(r5), r0
l.addi r12,r12,1 /* Increment 2nd exception counter */
/* Test l.lwz */
l.ori r5,r0,0x1 /* Word access, offset 1 */
l.lwz r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x2 /* Word access, offset 2 */
l.lwz r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Word access, offset 3 */
l.lwz r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
#if OR1200_HAS_LWS==1
/* Test l.lws */
l.ori r5,r0,0x1 /* Word access, offset 1 */
l.lws r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x2 /* Word access, offset 2 */
l.lws r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Word access, offset 3 */
l.lws r3,0x0(r5)
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.nop
#endif
/* Now test them in delay slots */
l.ori r5,r0,0x1 /* Half-word access, offset 1 */
l.j 1f
l.sh 0x0(r5),r0
l.nop
1: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Half-word access, offset 3 */
l.j 2f
l.sh 0x0(r5),r0
l.nop
2: l.addi r12,r12,1 /* Increment 2nd exception counter */
/* Test l.lhz */
l.ori r5,r0,0x1 /* Half-word access, offset 1 */
l.j 3f
l.lhz r3,0x0(r5)
l.nop
3: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Half-word access, offset 3 */
l.j 4f
l.lhz r3,0x0(r5)
l.nop
4: l.addi r12,r12,1 /* Increment 2nd exception counter */
/* Test l.lhs */
l.ori r5,r0,0x1 /* Half-word access, offset 1 */
l.j 5f
l.lhs r3,0x0(r5)
l.nop
5: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Half-word access, offset 3 */
l.j 6f
l.lhs r3,0x0(r5)
l.nop
6: l.addi r12,r12,1 /* Increment 2nd exception counter */
/* Test l.sw */
l.ori r5,r0,0x1 /* Word access, offset 1 */
l.j 7f
l.sw 0x0(r5), r0
l.nop
7: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x2 /* Word access, offset 2 */
l.j 8f
l.sw 0x0(r5), r0
l.nop
8: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Word access, offset 3 */
l.j 9f
l.sh 0x0(r5), r0
l.nop
9: l.addi r12,r12,1 /* Increment 2nd exception counter */
/* Test l.lwz */
l.ori r5,r0,0x1 /* Word access, offset 1 */
l.j 10f
l.lwz r3,0x0(r5)
l.nop
10: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x2 /* Word access, offset 2 */
l.j 11f
l.lwz r3,0x0(r5)
l.nop
11: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Word access, offset 3 */
l.j 12f
l.lwz r3,0x0(r5)
l.nop
12: l.addi r12,r12,1 /* Increment 2nd exception counter */
#if OR1200_HAS_LWS==1
/* Test l.lws */
l.ori r5,r0,0x1 /* Word access, offset 1 */
l.j 13f
l.lws r3,0x0(r5)
l.nop
13: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x2 /* Word access, offset 2 */
l.j 14f
l.lws r3,0x0(r5)
l.nop
14: l.addi r12,r12,1 /* Increment 2nd exception counter */
l.ori r5,r0,0x3 /* Word access, offset 3 */
l.j 15f
l.lws r3,0x0(r5)
l.nop
15: l.addi r12,r12,1 /* Increment 2nd exception counter */
#endif
/* Check 1st and 2nd exception counters are equal */
l.sfeq r11,r12 /* Should be equal */
l.bf 17f
l.nop
l.nop 1
17: l.nop 2
l.nop
/* Illegal instruction exception */
_illegal1:
l.nop
l.nop
l.movhi r5, hi(0x44004800) /* Put "l.jr r9" instruction in r5 */
l.ori r5, r5, lo(0x44004800)
l.sw 0x0(r0), r5 /* Write "l.j r9" to address 0x0 in RAM */
l.movhi r5, 0xee00 /* Put an illegal instruction in r5 */
l.sw 0x4(r0), r5 /* Write illegal instruction to RAM addr 0x4 */
l.movhi r5, 0x1500 /* l.nop after illegal instruction */
l.sw 0x8(r0), r5 /* Write nop to RAM addr 0x8 */
l.mtspr r0,r0,SPR_ICBIR /* Invalidate line 0 of cache */
/* Jump to 0x4 - illegal opcode instruction */
l.ori r6, r0, 0x4
l.jalr r6 /* Jump to address 0x4, land on illegal insn */
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.nop /* Should return here */
l.nop
/* Test in delay slot */
l.movhi r5, 0xee00 /* Put an illegal instruction in r5 */
l.sw 0x4(r0), r5 /* Write illegal instruction to RAM addr 0x4 */
l.mtspr r0,r0,SPR_ICBIR /* Invalidate line 0 of cache */
l.jalr r0 /* Jump to address 0, will be a jump back but with an illegal
dslot instruction which will befixed by handler */
l.addi r12,r12,1 /* Increment 2nd exception counter */
l.nop /* Should return here */
/* Check 1st and 2nd exception counters are equal */
l.sfeq r11,r12 /* Should be equal */
l.bf 1f
l.nop
l.or r3, r12, r12
l.nop 2 /* Report expected exception count */
l.or r3, r11, r11
l.nop 2 /* Report actual exception count */
l.nop 1
1: l.nop
l.nop
_dbus1:
l.nop
l.movhi r12, 0 /* Reset exception counters */
l.movhi r11, 0
l.ori r30, r0, 0xd /* put 0xd in r30, indicate it's databus test */
/* Cause access error */
/* Load word */
l.movhi r5, 0xee00 /* Address to cause an error */
l.lwz r6, 0(r5)
l.addi r12, r12, 1 /* Incremement secondary exception counter */
/* Load half */
l.movhi r5, 0xee00 /* Address to cause an error */
l.lhz r6, 0(r5)
l.addi r12, r12, 1 /* Incremement secondary exception counter */
/* Load byte */
l.movhi r5, 0xee00 /* Address to cause an error */
l.lbz r6, 0(r5)
l.addi r12, r12, 1 /* Incremement secondary exception counter */
/* Store word */
l.movhi r5, 0xee00 /* Address to cause an error */
l.sw 0(r5), r6
l.addi r12, r12, 1 /* Incremement secondary exception counter */
/* Store half */
l.movhi r5, 0xee00 /* Address to cause an error */
l.sh 0(r5), r6
l.addi r12, r12, 1 /* Incremement secondary exception counter */
/* Store byte */
l.movhi r5, 0xee00 /* Address to cause an error */
l.sb 0(r5), r6
l.addi r12, r12, 1 /* Incremement secondary exception counter */
l.nop
/* Delay slot tests */
/* Load word */
l.movhi r5, 0xee00 /* Address to cause an error */
l.j 1f
l.lwz r6, 0(r5) /* Data bus error in delay slot */
l.nop
1: l.addi r12, r12, 1
/* Load half */
l.movhi r5, 0xee00 /* Address to cause an error */
l.j 2f
l.lhz r6, 0(r5) /* Data bus error in delay slot */
l.nop
2: l.addi r12, r12, 1
/* Load byte */
l.movhi r5, 0xee00 /* Address to cause an error */
l.j 3f
l.lbz r6, 0(r5) /* Data bus error in delay slot */
l.nop
3: l.addi r12, r12, 1
/* Store word */
l.movhi r5, 0xee00 /* Address to cause an error */
l.j 4f
l.sw 0(r5), r6 /* Data bus error in delay slot */
l.nop
4: l.addi r12, r12, 1
/* Store half */
l.movhi r5, 0xee00 /* Address to cause an error */
l.j 5f
l.sh 0(r5), r6 /* Data bus error in delay slot */
l.nop
5: l.addi r12, r12, 1
/* Store byte */
l.movhi r5, 0xee00 /* Address to cause an error */
l.j 6f
l.sb 0(r5), r6 /* Data bus error in delay slot */
l.nop
6: l.addi r12, r12, 1
/* Check 1st and 2nd exception counters are equal */
l.sfeq r11,r12 /* Should be equal */
l.bf 7f
l.nop
l.or r3, r12, r12
l.nop 2 /* Report expected exception count */
l.or r3, r11, r11
l.nop 2 /* Report actual exception count */
l.nop 1
7: l.nop
_ibus1:
/* TODO: do this it with cache enabled/disabled */
l.movhi r12, 0 /* Reset exception counters */
l.movhi r11, 0
l.movhi r30, 0x0 /* put 0x0 in r30,indicate it's instruction bus test*/
/* Cause access error */
l.movhi r5, 0xee00 /* Address to cause an error */
l.jalr r5 /* Jump and link to bad address */
l.nop
l.addi r12, r12, 1 /* Incremement secondary exception counter */
/* Check 1st and 2nd exception counters are equal */
l.sfeq r11,r12 /* Should be equal */
l.bf 1f
l.nop
l.or r3, r12, r12
l.nop 2 /* Report expected exception count */
l.or r3, r11, r11
l.nop 2 /* Report actual exception count */
l.nop 1
1: l.nop
l.nop
/* Data MMU exception - try case where we need to translate address as
we l.rfe to it */
// Check the DMMU is the in the design, otherwise don't compile in this
// test.
#ifndef OR1200_NO_DMMU
.extern lo_dmmu_en
_dmmu_except1:
/* Call DMMU invalidate function */
l.movhi r4, hi(_dmmu_invalidate)
l.ori r4, r4, lo(_dmmu_invalidate)
l.jalr r4
l.ori r3, r0, 64 /* Put number of entries in r3 */
l.movhi r5, hi(0x01000000)
/* Write a word to the place where we'll translate to */
l.movhi r7, hi(0xaabbccdd)
l.ori r7, r7, lo(0xaabbccdd)
l.sw 0(r5), r7 /* Shouldn't trigger MMU */
l.sfne r18, r0
l.bf _dmmu_test_error
l.nop
l.sfne r19, r0
l.bf _dmmu_test_error
l.nop
/* Now enable DMMU */
l.movhi r4, hi(lo_dmmu_en)
l.ori r4, r4, lo(lo_dmmu_en)
l.jalr r4
l.nop
/* Now start test. 0xc0000000 should go to 0x01000000 */
l.lwz r8, 0(r5) /* Should cause DMMU miss, lomem */
/* Check value was OK */
l.sfne r7, r8
l.bf _dmmu_test_error
l.nop
l.sfnei r18, 0x1 /* Check for lo mem mapping */
l.bf _dmmu_test_error
l.nop
l.sfne r19, r0 /* hi-mem counter should still be 0 */
l.bf _dmmu_test_error
l.nop
/* Test accesses to mapped area */
l.movhi r6, hi(0xc0000000)
l.lwz r8, 0(r6) /* Should cause DMMU miss, himem */
/* Check value was OK */
l.sfne r7, r8
l.bf _dmmu_test_error
l.nop
l.sfnei r18, 0x1 /* Check for lo mem mapping */
l.bf _dmmu_test_error
l.nop
l.sfnei r19, 0x1 /* hi-mem counter should still be 0 */
l.bf _dmmu_test_error
l.nop
/* Now start test. 0xc0000000 should go to 0x01000000 */
l.lwz r8, 0(r5) /* Should cause DMMU miss, lomem */
/* Check value was OK */
l.sfne r7, r8
l.bf _dmmu_test_error
l.nop
l.sfnei r18, 0x2 /* Check for lo mem mapping increment */
l.bf _dmmu_test_error
l.nop
l.sfnei r19, 0x1 /* hi-mem counter should still be 1 */
l.bf _dmmu_test_error
l.nop
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 4(r6), r7 /* Should cause DMMU miss, himem */
l.sfnei r18, 0x2 /* Check for lo mem mapping */
l.bf _dmmu_test_error
l.nop
l.sfnei r19, 0x2 /* hi-mem counter should be 2 */
l.bf _dmmu_test_error
l.nop
l.lwz r8, 4(r5) /* Should cause DMMU miss, lomem */
/* Check value was OK */
l.sfne r7, r8
l.bf _dmmu_test_error
l.nop
l.sfnei r18, 0x3 /* Check for lo mem mapping increment */
l.bf _dmmu_test_error
l.nop
l.sfnei r19, 0x2 /* hi-mem counter should still be 2 */
l.bf _dmmu_test_error
l.nop
/* Fast DMMU exceptions should follow */
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 8(r6), r7 /* Should cause DMMU miss, himem */
l.lwz r8, 8(r5) /* Should cause DMMU miss, lomem */
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 0xc(r6), r7 /* Should cause DMMU miss, himem */
l.lwz r8, 0xc(r5) /* Should cause DMMU miss, lomem */
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 0x10(r6), r7 /* Should cause DMMU miss, himem */
l.lwz r8, 0x10(r5) /* Should cause DMMU miss, lomem */
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 0x14(r6), r7 /* Should cause DMMU miss, himem */
l.lwz r8, 0x14(r5) /* Should cause DMMU miss, lomem */
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 0x18(r6), r7 /* Should cause DMMU miss, himem */
l.lwz r8, 0x18(r5) /* Should cause DMMU miss, lomem */
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 0x1c(r6), r7 /* Should cause DMMU miss, himem */
l.lwz r8, 0x1c(r5) /* Should cause DMMU miss, lomem */
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 0x20(r6), r7 /* Should cause DMMU miss, himem */
l.lwz r8, 0x20(r5) /* Should cause DMMU miss, lomem */
l.addi r7, r7, 0x1111 /* Incremement value we're writing */
l.sw 0x24(r6), r7 /* Should cause DMMU miss, himem */
l.lwz r8, 0x24(r5) /* Should cause DMMU miss, lomem */
/* Should now be 11 lowmem DTLB misses and 10 for high memory space */
l.sfne r7, r8
l.bf _dmmu_test_error
l.nop
l.sfnei r18, 0xb /* Check for lo mem mapping increment to 11 */
l.bf _dmmu_test_error
l.nop
l.sfnei r19, 0xa /* hi-mem counter should be 10 */
l.bf _dmmu_test_error
l.nop
l.j _dmmu_test_ok
l.nop
_dmmu_test_error:
l.movhi r3, hi(0xeeeeeeed)
l.ori r3, r3, lo(0xeeeeeeed)
l.nop 2
l.nop 1
_dmmu_test_ok:
l.nop
#endif // #ifndef OR1200_NO_DMMU
/* End of tests - report and finish simulation */
l.movhi r3,hi(0xdeaddead)
l.ori r3,r3,lo(0xdeaddead)
l.nop 2
l.movhi r3,hi(0x8000000d)
l.ori r3,r3,lo(0x8000000d)
l.nop 2
l.addi r3,r0,0
l.jal exit
l.nop
/* DMMU invalidate function */
/* First parameter, r3, has number of DMMU entries (should be 64)*/
_dmmu_invalidate:
/* Setup the Data MMU's TLBS */
l.movhi r4, hi(SPR_DTLBMR_BASE(0))
l.ori r4, r4, lo(SPR_DTLBMR_BASE(0))
/* DTLB invalidate loop */
1:
l.mtspr r4, r0, 0x0
l.addi r4, r4, 0x1
l.sfeq r3, r0
l.bnf 1b
l.addi r3, r3, -1
l.jr r9
l.nop
Error running this command: diff -w -U 5 "" "/tmp/gwbVLq"
diff: : No such file or directory