URL
https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
Compare Revisions
- This comparison shows the changes necessary to convert path
/openrisc/tags/or1ksim/or1ksim-0.5.0rc1/testsuite/test-code-or1k/uos
- from Rev 346 to Rev 347
- ↔ Reverse comparison
Rev 346 → Rev 347
/Makefile.in
0,0 → 1,539
# Makefile.in generated by automake 1.11.1 from Makefile.am. |
# @configure_input@ |
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# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, |
# Inc. |
# This Makefile.in is free software; the Free Software Foundation |
# gives unlimited permission to copy and/or distribute it, |
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|
# This program is distributed in the hope that it will be useful, |
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@SET_MAKE@ |
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# Makefile.am for or1ksim uos test code |
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# Copyright (C) Marko Mlinar, 2001 |
# Copyright (C) Embecosm Limited, 2010 |
|
# Contributor Marko Mlinar |
# Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> |
|
# This file is part of OpenRISC 1000 Architectural Simulator. |
|
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/except-or32.S
0,0 → 1,377
/* except-or32.S Microkernel exception handler for Or1ksim |
|
Copyright (C) 2000 Damjan Lampret |
Copyright (C) 2010 Embecosm Limited |
|
Contributor Damjan Lampret <lampret@opencores.org> |
Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> |
|
This file is part of OpenRISC 1000 Architectural Simulator. |
|
This program is free software; you can redistribute it and/or modify it |
under the terms of the GNU General Public License as published by the Free |
Software Foundation; either version 3 of the License, or (at your option) |
any later version. |
|
This program 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 General Public License for |
more details. |
|
You should have received a copy of the GNU General Public License along |
with this program. If not, see <http: www.gnu.org/licenses/>. */ |
|
/* ---------------------------------------------------------------------------- |
This code is commented throughout for use with Doxygen. |
--------------------------------------------------------------------------*/ |
|
/* This file is part of test microkernel for OpenRISC 1000. */ |
|
#include "spr-defs.h" |
#include "board.h" |
|
#define MC_CSR (0x00) |
#define MC_POC (0x04) |
#define MC_BA_MASK (0x08) |
#define MC_CSC(i) (0x10 + (i) * 8) |
#define MC_TMS(i) (0x14 + (i) * 8) |
|
|
/* |
* Context is saved to area pointed by pointer in R3. Original |
* R3 is at memory location 0 and task's PC is at memory location 4. |
*/ |
#define SAVEREGS \ |
l.lwz r3,0(r3); \ |
l.sw 4(r3),r1; \ |
l.sw 8(r3),r2; \ |
l.lwz r2,0(r0); /* saving original r3*/ \ |
l.sw 12(r3),r2; \ |
l.sw 16(r3),r4; \ |
l.sw 20(r3),r5; \ |
l.sw 24(r3),r6; \ |
l.sw 28(r3),r7; \ |
l.sw 32(r3),r8; \ |
l.sw 36(r3),r9; \ |
l.sw 40(r3),r10; \ |
l.sw 44(r3),r11; \ |
l.sw 48(r3),r12; \ |
l.sw 52(r3),r13; \ |
l.sw 56(r3),r14; \ |
l.sw 60(r3),r15; \ |
l.sw 64(r3),r16; \ |
l.sw 68(r3),r17; \ |
l.sw 72(r3),r18; \ |
l.sw 76(r3),r19; \ |
l.sw 80(r3),r20; \ |
l.sw 84(r3),r21; \ |
l.sw 88(r3),r22; \ |
l.sw 92(r3),r23; \ |
l.sw 96(r3),r24; \ |
l.sw 100(r3),r25; \ |
l.sw 104(r3),r26; \ |
l.sw 108(r3),r27; \ |
l.sw 112(r3),r28; \ |
l.sw 116(r3),r29; \ |
l.sw 120(r3),r30; \ |
l.sw 124(r3),r31; \ |
l.lwz r2,4(r0); /* saving original PC*/ \ |
l.sw 0(r3),r2; \ |
\ |
l.mfspr r2,r0,SPR_ESR_BASE; \ |
l.sw 128(r3),r2 /* saving SR */ |
|
/* |
* Pointer to context is in R3. All registers are loaded and execution is |
* transfered to the loaded context's task |
*/ |
#define LOADREGS_N_GO \ |
l.lwz r3,0(r3); \ |
l.lwz r2,0(r3); /* prepare PC*/ \ |
l.mtspr r0,r2,SPR_EPCR_BASE; \ |
\ |
l.lwz r2,128(r3); /* prepare SR*/ \ |
l.mtspr r0,r2,SPR_ESR_BASE; \ |
\ |
l.lwz r1,4(r3); \ |
l.lwz r2,8(r3); \ |
l.lwz r4,16(r3); \ |
l.lwz r5,20(r3); \ |
l.lwz r6,24(r3); \ |
l.lwz r7,28(r3); \ |
l.lwz r8,32(r3); \ |
l.lwz r9,36(r3); \ |
l.lwz r10,40(r3); \ |
l.lwz r11,44(r3); \ |
l.lwz r12,48(r3); \ |
l.lwz r13,52(r3); \ |
l.lwz r14,56(r3); \ |
l.lwz r15,60(r3); \ |
l.lwz r16,64(r3); \ |
l.lwz r17,68(r3); \ |
l.lwz r18,72(r3); \ |
l.lwz r19,76(r3); \ |
l.lwz r20,80(r3); \ |
l.lwz r21,84(r3); \ |
l.lwz r22,88(r3); \ |
l.lwz r23,92(r3); \ |
l.lwz r24,96(r3); \ |
l.lwz r25,100(r3); \ |
l.lwz r26,104(r3); \ |
l.lwz r27,108(r3); \ |
l.lwz r28,112(r3); \ |
l.lwz r29,116(r3); \ |
l.lwz r30,120(r3); \ |
l.lwz r31,124(r3); \ |
\ |
l.lwz r3,12(r3); /* prepare r3*/ \ |
\ |
l.rfe; /* Call task */ \ |
l.nop |
|
/* |
* All registers are loaded from save area. |
*/ |
#define LOADREGS \ |
l.lwz r3,0(r3); \ |
l.lwz r2,0(r3); /* prepare PC*/ \ |
l.mtspr r0,r2,SPR_EPCR_BASE; \ |
\ |
l.lwz r2,128(r3); /* prepare SR*/ \ |
l.mtspr r0,r2,SPR_ESR_BASE; \ |
\ |
l.lwz r1,4(r3); \ |
l.lwz r2,8(r3); \ |
l.lwz r4,16(r3); \ |
l.lwz r5,20(r3); \ |
l.lwz r6,24(r3); \ |
l.lwz r7,28(r3); \ |
l.lwz r8,32(r3); \ |
l.lwz r9,36(r3); \ |
l.lwz r10,40(r3); \ |
l.lwz r11,44(r3); \ |
l.lwz r12,48(r3); \ |
l.lwz r13,52(r3); \ |
l.lwz r14,56(r3); \ |
l.lwz r15,60(r3); \ |
l.lwz r16,64(r3); \ |
l.lwz r17,68(r3); \ |
l.lwz r18,72(r3); \ |
l.lwz r19,76(r3); \ |
l.lwz r20,80(r3); \ |
l.lwz r21,84(r3); \ |
l.lwz r22,88(r3); \ |
l.lwz r23,92(r3); \ |
l.lwz r24,96(r3); \ |
l.lwz r25,100(r3); \ |
l.lwz r26,104(r3); \ |
l.lwz r27,108(r3); \ |
l.lwz r28,112(r3); \ |
l.lwz r29,116(r3); \ |
l.lwz r30,120(r3); \ |
l.lwz r31,124(r3); \ |
\ |
l.lwz r3,12(r3); /* prepare r3*/ |
|
/* |
* Set new PC in saved context |
*/ |
#define SET_CONTEXTPC(AREA,SUBROUTINE,TMPREG) \ |
l.lwz AREA,0(AREA); \ |
l.movhi TMPREG,hi(SUBROUTINE); \ |
l.addi TMPREG,r0,lo(SUBROUTINE); \ |
l.sw 0(AREA),TMPREG; |
|
/* |
* Printf via or1ksim hook |
*/ |
#if KERNEL_OUTPUT |
#define PRINTF(REG,STR) \ |
l.movhi REG,hi(STR); \ |
l.addi REG,r0,lo(STR); \ |
l.nop NOP_PRINTF |
#else |
#define PRINTF(REG,STR) |
#endif |
|
/* |
* Reset Exception handler |
*/ |
.org 0x100 |
reset_vector: |
|
l.movhi r3,hi(MC_BASE_ADDR) |
l.ori r3,r3,lo(MC_BASE_ADDR) |
|
l.addi r4,r3,MC_CSC(0) |
l.movhi r5,hi(FLASH_BASE_ADDR) |
l.srai r5,r5,6 |
l.ori r5,r5,0x0025 |
l.sw 0(r4),r5 |
|
l.addi r4,r3,MC_TMS(0) |
l.movhi r5,hi(FLASH_TMS_VAL) |
l.ori r5,r5,lo(FLASH_TMS_VAL) |
l.sw 0(r4),r5 |
|
l.addi r4,r3,MC_BA_MASK |
l.addi r5,r0,MC_MASK_VAL |
l.sw 0(r4),r5 |
|
l.addi r4,r3,MC_CSR |
l.movhi r5,hi(MC_CSR_VAL) |
l.ori r5,r5,lo(MC_CSR_VAL) |
l.sw 0(r4),r5 |
|
l.addi r4,r3,MC_TMS(1) |
l.movhi r5,hi(SDRAM_TMS_VAL) |
l.ori r5,r5,lo(SDRAM_TMS_VAL) |
l.sw 0(r4),r5 |
|
l.addi r4,r3,MC_CSC(1) |
l.movhi r5,hi(SDRAM_BASE_ADDR) |
l.srai r5,r5,6 |
l.ori r5,r5,0x0411 |
l.sw 0(r4),r5 |
|
l.jr r9 |
l.nop |
|
/* Copy data section */ |
l.movhi r3,hi(_src_beg) |
l.ori r3,r3,lo(_src_beg) |
l.addi r4,r0,0x200 |
l.movhi r5,hi(_except_end) |
l.ori r5,r5,lo(_except_end) |
l.movhi r6,hi(_except_beg) |
l.ori r6,r6,lo(_except_beg) |
l.sub r5,r6,r5 |
1: |
l.lwz r6,0(r3) |
l.sw 0(r4),r6 |
l.addi r3,r3,4 |
l.addi r4,r4,4 |
l.addi r5,r5,-4 |
l.sfgtsi r5,0 |
l.bf 1b |
l.nop |
|
l.movhi r4,hi(_dst_beg) |
l.ori r4,r4,lo(_dst_beg) |
l.movhi r5,hi(_dst_end) |
l.ori r5,r5,lo(_dst_end) |
l.sub r5,r5,r4 |
l.sfeqi r5,0 |
l.bf 2f |
l.nop |
1: |
l.lwz r6,0(r3) |
l.sw 0(r4),r6 |
l.addi r3,r3,4 |
l.addi r4,r4,4 |
l.addi r5,r5,-4 |
l.sfgtsi r5,0 |
l.bf 1b |
l.nop |
|
2: |
|
|
l.movhi r2,hi(reset) |
l.ori r2,r2,lo(reset) |
l.jr r2 |
l.nop |
|
/* |
* Switch to a new context pointed by task_context |
*/ |
.global dispatch |
.align 4 |
dispatch: |
/* load user task GPRs and PC */ |
l.movhi r3,hi(task_context) |
l.addi r3,r0,lo(task_context) |
LOADREGS_N_GO |
|
.section .except, "ax" |
|
/* |
* Bus Error Exception handler |
*/ |
.org 0x0200 |
buserr: |
l.nop |
l.sw 0(r0),r3 /* Save r3 */ |
PRINTF(r3, buserr_str) |
hang: |
l.j hang |
l.nop |
|
buserr_str: |
.ascii "Bus error exception.\n\000" |
|
/* |
* External Interrupt Exception handler |
*/ |
.org 0x800 |
extint: |
l.nop |
l.sw 0(r0),r3 /* Save r3 */ |
PRINTF(r3,extint_str) |
l.mfspr r3,r0,SPR_EPCR_BASE /* Get EPCR */ |
l.sw 4(r0),r3 /* and save it */ |
|
/* now save user task context */ |
l.movhi r3,hi(task_context) |
l.addi r3,r0,lo(task_context) |
SAVEREGS |
|
/* set kernel context's PC to kernel's scheduler */ |
l.movhi r3,hi(kernel_context) |
l.addi r3,r0,lo(kernel_context) |
SET_CONTEXTPC(r3,int_main,r4) |
|
/* load kernel context */ |
l.movhi r3,hi(kernel_context) |
l.addi r3,r0,lo(kernel_context) |
LOADREGS |
|
l.movhi r3,hi(int_main) |
l.addi r3,r0,lo(int_main) |
l.jr r3 |
l.nop |
|
extint_str: |
.ascii "External interrupt exception.\n\000" |
|
/* |
* System Call Exception handler |
*/ |
.org 0x0c00 |
syscall: |
l.nop |
l.sw 0(r0),r3 /* Save r3 */ |
PRINTF(r3,syscall_str) |
l.mfspr r3,r0,SPR_EPCR_BASE /* Get EPCR */ |
l.addi r3,r3,4 /* increment because EPCR instruction was already executed */ |
l.sw 4(r0),r3 /* and save it */ |
|
/* now save user task context */ |
l.movhi r3,hi(task_context) |
l.addi r3,r0,lo(task_context) |
SAVEREGS |
|
/* set kernel context's PC to kernel's syscall entry */ |
l.movhi r3,hi(kernel_context) |
l.addi r3,r0,lo(kernel_context) |
SET_CONTEXTPC(r3,kernel_syscall,r4) |
|
/* load kernel context */ |
l.movhi r3,hi(kernel_context) |
l.addi r3,r0,lo(kernel_context) |
LOADREGS_N_GO |
|
syscall_str: |
.ascii "System call exception.\n\000" |
|
|
except-or32.S
Property changes :
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Added: svn:keywords
## -0,0 +1 ##
+Id
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Index: ipc.h
===================================================================
--- ipc.h (nonexistent)
+++ ipc.h (revision 347)
@@ -0,0 +1,53 @@
+/* ipc.h. Microkernel IPC header for Or1ksim
+
+ Copyright (C) 2000 Damjan Lampret
+ Copyright (C) 2010 Embecosm Limited
+
+ Contributor Damjan Lampret
+ Contributor Jeremy Bennett
+
+ This file is part of OpenRISC 1000 Architectural Simulator.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option)
+ any later version.
+
+ This program 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 General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program. If not, see . */
+
+/* ----------------------------------------------------------------------------
+ This code is commented throughout for use with Doxygen.
+ --------------------------------------------------------------------------*/
+
+/* This file is part of test microkernel for OpenRISC 1000. */
+
+/* Operation completed sucessfully. */
+#define IPC_NOERR 0
+
+/* Can't send any messages due to lack of free MCBs. */
+#define IPC_EOUTOFMCBS 1
+
+/* Sending message: No such destination task.
+ Receiving message: No such origin task. */
+#define IPC_ENOTASK 2
+
+/* Message to big to be sent or receive buffer is to small for
+ receiving message. If receiving then try again with bigger buffer. */
+#define IPC_ETOOBIG 3
+
+/* No messages waiting to be received. */
+#define IPC_ENOMSGS 4
+
+/* Send message in buffer buf of size len to task desttask. */
+void uos_msgsnd(tid_t desttask, char *buf, int len);
+
+/* Receive message of max size len from task origintask and put it
+ into buffer buf. If origintask is zero then get the first message
+ from the message queue. */
+void uos_msgrcv(tid_t origintask, char *buf, int len);
ipc.h
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+native
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Added: svn:keywords
## -0,0 +1 ##
+Id
\ No newline at end of property
Index: task.c
===================================================================
--- task.c (nonexistent)
+++ task.c (revision 347)
@@ -0,0 +1,79 @@
+/* task.c. Microkernel task handler for Or1ksim
+
+ Copyright (C) 2000 Damjan Lampret
+ Copyright (C) 2010 Embecosm Limited
+
+ Contributor Damjan Lampret
+ Contributor Jeremy Bennett
+
+ This file is part of OpenRISC 1000 Architectural Simulator.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option)
+ any later version.
+
+ This program 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 General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program. If not, see . */
+
+/* ----------------------------------------------------------------------------
+ This code is commented throughout for use with Doxygen.
+ --------------------------------------------------------------------------*/
+
+/* This file is part of test microkernel for OpenRISC 1000. */
+
+#include "support.h"
+#include "uos.h"
+#include "ipc.h"
+#include "int.h"
+
+extern struct tcb tasks[MAX_TASKS+1];
+
+int task(int id)
+{
+ struct _msg {
+ char id;
+ unsigned long count;
+ } msg;
+
+ printf("Task %d started\n", id);
+
+ if(id == 1) {
+ msg.id = 1;
+ msg.count = 0;
+ uos_msgsnd(2, (char *)&msg, sizeof(msg));
+ }
+
+ for(;;) {
+ uos_msgrcv(0, (char *)&msg, sizeof(msg));
+
+ printf("Task %d: Got massage from task %d: 0x%.8x. "
+ "Sending message to task %d: 0x%.8x \n", id, msg.id,
+ (int)msg.count, (id == 3 ? 1 : (id + 1)),
+ (int)(msg.count + 1));
+ msg.id = id;
+
+ if((id == 1) && (msg.count > 15)) {
+ report(msg.count + 0xdeadde9c);
+ exit(0);
+
+
+ msg.count += 1;
+ uos_msgsnd((id == 3 ? 1 : (id + 1)), (char *)&msg, sizeof(msg));
+ }
+ }
+}
+
+/* Called by kernel_init to collect all tasks entries. */
+void tasks_entries()
+{
+ tasks[1].regs.pc = (unsigned long)task;
+ tasks[2].regs.pc = (unsigned long)task;
+ tasks[3].regs.pc = (unsigned long)task;
+}
+
task.c
Property changes :
Added: svn:eol-style
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+native
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Index: uos.c
===================================================================
--- uos.c (nonexistent)
+++ uos.c (revision 347)
@@ -0,0 +1,342 @@
+/* uos.c. Microkernel for Or1ksim
+
+ Copyright (C) 2000 Damjan Lampret
+ Copyright (C) 2010 Embecosm Limited
+
+ Contributor Damjan Lampret
+ Contributor Jeremy Bennett
+
+ This file is part of OpenRISC 1000 Architectural Simulator.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option)
+ any later version.
+
+ This program 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 General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program. If not, see . */
+
+/* ----------------------------------------------------------------------------
+ This code is commented throughout for use with Doxygen.
+ --------------------------------------------------------------------------*/
+
+/* This file is part of test microkernel for OpenRISC 1000. */
+
+#include "support.h"
+#include "spr-defs.h"
+#include "uos.h"
+#include "ipc.h"
+#include "int.h"
+
+/* External functions prototypes */
+int tick_init(unsigned long period, void (* inf)(void));
+
+/* Pointers to contexts used by except_or32.S routines */
+unsigned long *task_context;
+unsigned long *kernel_context;
+
+/* TCBs for all tasks in the system */
+struct tcb tasks[MAX_TASKS+1];
+
+/* Stacks for the tasks (stacks[0] is kernel stack) */
+unsigned char stacks[MAX_TASKS+1][STACK_SIZE];
+
+/* MCBs for IPC messages */
+struct mcb msgs[MAX_MSGS];
+
+/* Pointer to linked list of free MCBs. */
+struct mcb *free_mcbs;
+
+/* TID of the current user task */
+tid_t curtask = 0;
+
+/* Statistics */
+int kernel_sched_cnt = 0;
+int kernel_syscall_cnt = 0;
+
+/* Timestamp via or1ksim (CPU cycle number). */
+unsigned long timestamp()
+{
+ register unsigned long cycles asm("r3");
+ asm("l.sys 201");
+ return cycles;
+}
+
+/* Standard function for filling memory with a constant byte. */
+void *memset(void *dst, int c, size_t size)
+{
+ char *tmp = dst;
+
+ for(;tmp && (tmp < (char *)dst + size); tmp++)
+ *(char *)tmp = (char)c;
+
+ return dst;
+}
+
+/* Traverse linked list of MCBs and show individual messages. */
+void kernel_show_mcbs(struct mcb *mcb)
+{
+ for(;mcb; mcb = mcb->next) {
+ printf("MCB len=%u origintask=%u ", mcb->length, mcb->origin);
+ printf("msg:%s\n", mcb->msg);
+ }
+}
+
+/* Show all contexts. */
+void kernel_show_contexts()
+{
+ int i;
+ tid_t t;
+
+ for(t = 1; t <= MAX_TASKS; t++) {
+ printf("\ntask TID=%d: PC=0x%x ", t, (unsigned)tasks[t].regs.pc & ~0x3);
+ printf("SP(r1)=0x%x ", (unsigned)tasks[t].regs.sp);
+ printf("SR[IEE]=%d\n", (unsigned)tasks[t].regs.sr & SPR_SR_IEE);
+ printf("SR[TEE]=%d\n", (unsigned)tasks[t].regs.sr & SPR_SR_TEE);
+ printf("SR[SM]=%d\n", (unsigned)tasks[t].regs.sr & SPR_SR_SM);
+ for(i = 1; i < GPRS; i++) {
+ if (i % 4 == 0)
+ printf("\n");
+ printf("r%d=0x%.8x ", i, (unsigned)tasks[t].regs.gprs[i]);
+ }
+ printf("\n");
+ kernel_show_mcbs(tasks[t].waiting_msgs);
+ }
+ printf("\n");
+}
+
+/* Simple round-robin scheduler that directly calls dispatcher. It is
+ called by low level external interrupt exception handler or by
+ kernel_syscall if KERNEL_SYSCALL_SCHED is defined. */
+void kernel_sched()
+{
+ if ((++curtask > MAX_TASKS) || !(tasks[curtask].regs.pc & ~0x3))
+ curtask = 1;
+ task_context = (unsigned long *)&tasks[curtask].regs;
+
+#if KERNEL_OUTPUT
+ printf("kernel_sched(): entry number %d, ", ++kernel_sched_cnt);
+ printf("dispatching task TID=%d, time %u cycles", curtask, timestamp());
+
+ kernel_show_contexts();
+#endif
+
+ dispatch();
+}
+
+/* System call uos_msgsnd. */
+void
+uos_msgsnd(tid_t desttask, char *buf, int len)
+{
+ asm("l.sys 1");
+ asm("l.nop");
+}
+
+/* System call uos_msgrcv. */
+void
+uos_msgrcv(tid_t origintask, char *buf, int len)
+{
+ asm("l.sys 2");
+ asm("l.nop");
+}
+
+/* Handles system call uos_msgsnd. */
+void kernel_msgsnd(tid_t tid)
+{
+ struct mcb *mcb;
+ struct mcb **dstmq;
+ struct tcb *task;
+
+ task = &tasks[tid];
+
+ /* Sanity checks. */
+
+ /* Does destination task exist? */
+ if (!task->regs.gprs[1] || (task->regs.gprs[1] > MAX_TASKS)) {
+ task->regs.gprs[9] = IPC_ENOTASK;
+ return;
+ }
+
+ /* Are there any free MCBs? */
+ if (!free_mcbs) {
+ task->regs.gprs[9] = IPC_EOUTOFMCBS;
+ return;
+ }
+
+ /* Is message too big to fit into MCB's message buffer? */
+ if (task->regs.gprs[3] > MAX_MSGLEN) {
+ task->regs.gprs[9] = IPC_ETOOBIG;
+ return;
+ }
+
+ /* OK, send the message. */
+
+ /* First, allocate MCB. */
+ mcb = free_mcbs;
+ free_mcbs = mcb->next;
+
+ /* Second, copy message to the MCB. */
+ memcpy(mcb->msg, (void *)task->regs.gprs[2], task->regs.gprs[3]);
+ mcb->origin = tid;
+ mcb->length = task->regs.gprs[3];
+ mcb->next = NULL;
+
+ /* Insert MCB into destination task's message queue at
+ the end. */
+ dstmq = &tasks[task->regs.gprs[1]].waiting_msgs;
+ for(;*dstmq;)
+ dstmq = &((*dstmq)->next);
+ *dstmq = mcb;
+
+ task->regs.gprs[9] = IPC_NOERR;
+ return;
+}
+
+/* Handles system call uos_msgrcv. */
+void kernel_msgrcv(tid_t tid)
+{
+ struct mcb *curmsg, **linkp;
+ struct tcb *task;
+
+ task = &tasks[tid];
+
+ /* Sanity checks. */
+
+ /* Does origin task exist? */
+ if (task->regs.gprs[1] > MAX_TASKS) {
+ task->regs.gprs[9] = IPC_ENOTASK;
+ return;
+ }
+
+ /* Are there any messages waiting for reception? */
+ if (!task->waiting_msgs) {
+ task->regs.gprs[9] = IPC_ENOMSGS;
+ return;
+ }
+
+ /* OK, receive the message. */
+
+ /* Search waiting messages for one coming from origintask. If
+ origintask is zero then grab the first message. */
+ curmsg = task->waiting_msgs;
+ linkp = &task->waiting_msgs;
+ for(;task->regs.gprs[1] && curmsg->next && curmsg->origin != task->regs.gprs[1];) {
+ linkp = &curmsg->next;
+ curmsg = curmsg->next;
+ }
+
+ /* Is receive buffer too small for receiving message? */
+ if (task->regs.gprs[3] < curmsg->length) {
+ task->regs.gprs[9] = IPC_ETOOBIG;
+ return;
+ }
+
+ /* Now copy the message from the MCB. */
+ memcpy((void *)task->regs.gprs[2], curmsg->msg, task->regs.gprs[3]);
+
+ /* Remove MCB from task's waiting queue and place it
+ back into free MCBs queue. */
+ *linkp = curmsg->next;
+ curmsg->next = free_mcbs;
+ free_mcbs = curmsg;
+
+ task->regs.gprs[9] = IPC_NOERR;
+ return;
+}
+
+/* Handles all uOS system calls. It is called by low level system call
+ exception handler. */
+void kernel_syscall()
+{
+ unsigned short syscall_num;
+
+#if KERNEL_OUTPUT
+ printf("kernel_syscall(): entry number %d, ", ++kernel_syscall_cnt);
+ printf("current TID=%d, time %u cycles", curtask, timestamp());
+
+ kernel_show_contexts();
+#endif
+ syscall_num = *(unsigned short *)((tasks[curtask].regs.pc & ~0x3) - 6);
+
+ switch(syscall_num) {
+ case IPC_MSGSND:
+ kernel_msgsnd(curtask);
+ break;
+ case IPC_MSGRCV:
+ kernel_msgrcv(curtask);
+ break;
+ default:
+ printf("kernel_syscall(): unknown syscall (%u)\n", syscall_num);
+ }
+
+#if KERNEL_SYSCALL_SCHED
+ kernel_sched();
+#endif
+ dispatch();
+}
+
+/* Called by reset exception handler to initialize the kernel and start
+ rolling first task. */
+void
+kernel_init()
+{
+ tid_t t;
+ int i;
+
+ printf("Initializing kernel:\n");
+
+ printf(" Clearing kernel structures...\n");
+ memset(tasks, 0, sizeof(tasks));
+ memset(stacks, 0, sizeof(stacks));
+ memset(msgs, 0, sizeof(msgs));
+
+ printf(" Initializing MCBs... %d MCB(s)\n", MAX_MSGS);
+ for(i = 0; i < (MAX_MSGS - 1); i++)
+ msgs[i].next = &msgs[i+1];
+ free_mcbs = &msgs[0];
+
+ printf(" Initializing TCBs... %d user task(s)\n", MAX_TASKS);
+
+ tasks_entries();
+
+ for(t = 0; t <= MAX_TASKS; t++) {
+ tasks[t].regs.sp = (unsigned long)stacks[t] + STACK_SIZE - 4;
+ /* Disable EXR for kernel context */
+ tasks[t].regs.sr |= (t == 0 ? SPR_SR_SM : SPR_SR_TEE | SPR_SR_IEE);
+ tasks[t].regs.gprs[1] = t;
+ }
+
+ /* First task runs in seprvisor mode */
+ tasks[1].regs.sr |= SPR_SR_SM;
+
+ /* TID=0 is reserved for kernel use */
+ kernel_context = (unsigned long *)&tasks[0].regs;
+
+ /* First task to be scheduled is task TID=1 */
+ task_context = (unsigned long *)&tasks[1].regs;
+
+ /* Initialize initrrupt controller */
+ int_init();
+
+ printf(" Exceptions will be enabled when first task is dispatched.\n");
+ printf("Kernel initalized. Starting first user task.\n");
+
+#if KERNEL_SYSCALL_SCHED
+ kernel_sched(); /* Lets schedule and dispatch our first task */
+#else
+ tick_init(TICK_PERIOD, kernel_sched);
+ kernel_sched(); /* Lets schedule and dispatch our first task */
+#endif
+ /* ... */ /* We never get here */
+}
+
+int main ()
+{
+ kernel_init();
+ return 0;
+}
uos.c
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Index: Makefile.am
===================================================================
--- Makefile.am (nonexistent)
+++ Makefile.am (revision 347)
@@ -0,0 +1,41 @@
+# Makefile.am for or1ksim uos test code
+
+# Copyright (C) Marko Mlinar, 2001
+# Copyright (C) Embecosm Limited, 2010
+
+# Contributor Marko Mlinar
+# Contributor Jeremy Bennett
+
+# This file is part of OpenRISC 1000 Architectural Simulator.
+
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 3 of the License, or (at your option)
+# any later version.
+
+# This program 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 General Public License for
+# more details.
+
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see . */
+
+# -----------------------------------------------------------------------------
+# This code is commented throughout for use with Doxygen.
+# -----------------------------------------------------------------------------
+
+
+# A test program to show that basic C functionality works
+check_PROGRAMS = uos
+
+uos_SOURCES = except-or32.S \
+ ipc.h \
+ task.c \
+ tick.c \
+ uos.h \
+ uos.c
+
+uos_LDFLAGS = -T$(srcdir)/../default.ld
+
+uos_LDADD = ../support/libsupport.la
Makefile.am
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Index: tick.c
===================================================================
--- tick.c (nonexistent)
+++ tick.c (revision 347)
@@ -0,0 +1,60 @@
+/* tick.c. Microkernel tick handler for Or1ksim
+
+ Copyright (C) 2000 Damjan Lampret
+ Copyright (C) 2010 Embecosm Limited
+
+ Contributor Damjan Lampret
+ Contributor Jeremy Bennett
+
+ This file is part of OpenRISC 1000 Architectural Simulator.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option)
+ any later version.
+
+ This program 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 General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program. If not, see . */
+
+/* ----------------------------------------------------------------------------
+ This code is commented throughout for use with Doxygen.
+ --------------------------------------------------------------------------*/
+
+/* This file is part of test microkernel for OpenRISC 1000. */
+
+#include "spr-defs.h"
+#include "support.h"
+
+/* Tick timer period */
+unsigned long tick_period;
+
+/* Inform of tick interrupt */
+void (*tick_inf)();
+
+/* Tick interrupt routine */
+void tick_int()
+{
+ /* Call inf routine */
+ (*tick_inf)();
+
+ /* Set new counter period iand clear inet pending bit */
+ mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | (tick_period & SPR_TTMR_PERIOD));
+}
+
+/* Initialize routine */
+int tick_init(unsigned long period, void (* inf)())
+{
+ /* Save tick timer period and inform routine */
+ tick_period = period;
+ tick_inf = inf;
+
+ /* Set counter period, enable timer and interrupt */
+ mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | (period & SPR_TTMR_PERIOD));
+
+ return 0;
+}
tick.c
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Index: uos.h
===================================================================
--- uos.h (nonexistent)
+++ uos.h (revision 347)
@@ -0,0 +1,84 @@
+/* uos.h. Microkernel header for Or1ksim
+
+ Copyright (C) 2000 Damjan Lampret
+ Copyright (C) 2010 Embecosm Limited
+
+ Contributor Damjan Lampret
+ Contributor Jeremy Bennett
+
+ This file is part of OpenRISC 1000 Architectural Simulator.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option)
+ any later version.
+
+ This program 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 General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program. If not, see . */
+
+/* ----------------------------------------------------------------------------
+ This code is commented throughout for use with Doxygen.
+ --------------------------------------------------------------------------*/
+
+/* This file is part of test microkernel for OpenRISC 1000. */
+
+/* Length of the IPC message's useful data. */
+#define MAX_MSGLEN 100
+
+/* Number of user tasks in the system. */
+#define MAX_TASKS 8
+
+/* Number of IPC messages in the system. */
+#define MAX_MSGS 16
+
+/* Number of general purpose registers (not counting r0 and r1). */
+#define GPRS 30
+
+/* Size of kernel and user task stacks. Size for individual task. */
+#define STACK_SIZE 2048
+
+/* Define this if you want kernel debug output. Note that you must
+ assemble except_or32.S with KERNEL_OUTPUT defined in Makefile. This
+ definition is only for main uos.c. */
+#define KERNEL_OUTPUT 0
+
+/* Define this if you want task switch at every system call. */
+#define KERNEL_SYSCALL_SCHED 0
+
+/* System tick timer period */
+#define TICK_PERIOD 0x500
+
+/* Task ID type (if we would have processes then we would call it PID) */
+typedef int tid_t;
+
+/* System call numbers */
+#define IPC_MSGSND 1
+#define IPC_MSGRCV 2
+
+/* Message Control Block structure */
+struct mcb {
+ char msg[MAX_MSGLEN]; /* Message's data */
+ int length; /* Message's length */
+ tid_t origin; /* TID of message's origin task */
+ struct mcb *next; /* Next message in linked list */
+};
+
+/* Task Control Block structure */
+struct tcb {
+ struct regs {
+ unsigned long pc; /* Task's PC */
+ unsigned long sp; /* Task's stack (r1)*/
+ unsigned long gprs[GPRS]; /* Task's GPRs r2-r15 */
+ unsigned long sr; /* Task's supervision register */
+ } regs;
+ struct mcb *waiting_msgs; /* Waiting messages */
+};
+
+extern void dispatch();
+/* Called by kernel_init to collect all tasks entries. */
+extern void tasks_entries();
uos.h
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Index: README
===================================================================
--- README (nonexistent)
+++ README (revision 347)
@@ -0,0 +1,31 @@
+ Or1ksim Test Suite: uOS Micro OS
+ ================================
+
+This is the Micro OS (uOS) developed by Damjan Lampret. At present the code
+builds, but there is no suitable Or1ksim configuration.
+
+Jeremy Bennett
+19 April 2010
+
+
+ORIGINAL README
+===============
+
+This is the Micro OS (uOS) for testing operating system features of OpenRISC
+1000 architecture. Specifically non reentrant, preemptive multitasking
+microkernel. Purpose of this code is not to be a true operating system but
+merely a testbench for testing the architecture, or1ksim and software
+development tools (GCC, Binutils, ...).
+
+This test OS has all necessary exception handlers to handle exceptions. There
+are two tasks: one task generates data and passes that data via IPC to the
+second task. Second task outputs the data via or1ksim syscall to the
+simulator.
+
+Currently only OR32 is supported (exception handlers are written in
+assembly). Tools required to compile sources are the latest or32-coff-gcc,
+or32-coff-as and or32-coff-ld. Also make sure you undefine
+VIRTUAL_MACHINE_ONLY when compiling or1ksim.
+
+--
+10/Jun/2000, Damjan Lampret, lampret@opencores.org
README
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