WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/mips32/src/mips32.c


/*
 * Copyright (C) 2003-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <arch.h>
#include <arch/cp0.h>
#include <arch/exception.h>
#include <arch/asm/regname.h>
#include <arch/asm.h>
#include <mm/vm.h>
#include <userspace.h>
#include <arch/console.h>
#include <memstr.h>
#include <arch/interrupt.h>
#include <arch/drivers/arc.h>
#include <arch/drivers/keyboard.h>
#include <proc/thread.h>
#include <print.h>
 
/* Size of the code jumping to the exception handler code
 * - J+NOP
 */
#define EXCEPTION_JUMP_SIZE    8
 
#define TLB_EXC ((char *) 0x80000000)
#define NORM_EXC ((char *) 0x80000180)
#define CACHE_EXC ((char *) 0x80000100)
 
void arch_pre_mm_init(void)
{
    /* It is not assumed by default */
    interrupts_disable();
 
    arc_init();
 
    /* Copy the exception vectors to the right places */
    memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
    memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
    memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
 
    /*
     * 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));
 
    /*
     * Mask all interrupts
     */
    cp0_mask_all_int();
    /*
     * Unmask hardware clock interrupt.
     */
    cp0_unmask_int(TIMER_IRQ);
 
    /*
     * Start hardware clock.
     */
    cp0_compare_write(cp0_compare_value + cp0_count_read());
 
    console_init();
    keyboard_init();
    arc_print_memory_map();
    arc_print_devices();
}
 
void arch_post_mm_init(void)
{
}
 
void arch_pre_smp_init(void)
{
}
 
void arch_post_smp_init(void)
{
}
 
void userspace(void)
{
    /* EXL=1, UM=1, IE=1 */
    cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
                          cp0_status_um_bit |
                          cp0_status_ie_enabled_bit));
   
    cp0_epc_write(UTEXT_ADDRESS);
    userspace_asm(USTACK_ADDRESS+PAGE_SIZE);
    while (1)
        ;
}
 
/* Stack pointer saved when entering user mode */
/* TODO: How do we do it on SMP system???? */
__address supervisor_sp;
 
void before_thread_runs_arch(void)
{
    supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
}
 

Rev 534	Rev 573
1	/*	1	/*
2	* Copyright (C) 2003-2004 Jakub Jermar	2	* Copyright (C) 2003-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <arch.h>	29	#include <arch.h>
30	#include <arch/cp0.h>	30	#include <arch/cp0.h>
31	#include <arch/exception.h>	31	#include <arch/exception.h>
32	#include <arch/asm/regname.h>	32	#include <arch/asm/regname.h>
33	#include <arch/asm.h>	33	#include <arch/asm.h>
34	#include <mm/vm.h>	34	#include <mm/vm.h>
35	#include <userspace.h>	35	#include <userspace.h>
36	#include <arch/console.h>	36	#include <arch/console.h>
37	#include <memstr.h>	37	#include <memstr.h>
38	#include <arch/interrupt.h>	38	#include <arch/interrupt.h>
39	#include <arch/drivers/arc.h>	39	#include <arch/drivers/arc.h>
40	#include <arch/drivers/keyboard.h>	40	#include <arch/drivers/keyboard.h>
41	#include <proc/thread.h>	41	#include <proc/thread.h>
42	#include <print.h>	42	#include <print.h>
43		43
44	/* Size of the code jumping to the exception handler code	44	/* Size of the code jumping to the exception handler code
45	* - J+NOP	45	* - J+NOP
46	*/	46	*/
47	#define EXCEPTION_JUMP_SIZE 8	47	#define EXCEPTION_JUMP_SIZE 8
48		48
49	#define TLB_EXC ((char *) 0x80000000)	49	#define TLB_EXC ((char *) 0x80000000)
50	#define NORM_EXC ((char *) 0x80000180)	50	#define NORM_EXC ((char *) 0x80000180)
51	#define CACHE_EXC ((char *) 0x80000100)	51	#define CACHE_EXC ((char *) 0x80000100)
52		52
53	void arch_pre_mm_init(void)	53	void arch_pre_mm_init(void)
54	{	54	{
55	/* It is not assumed by default */	55	/* It is not assumed by default */
56	interrupts_disable();	56	interrupts_disable();
57		57
58	init_arc();	58	arc_init();
59		59
60	/* Copy the exception vectors to the right places */	60	/* Copy the exception vectors to the right places */
61	memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);	61	memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
62	memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);	62	memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
63	memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);	63	memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
64		64
65	/*	65	/*
66	* Switch to BEV normal level so that exception vectors point to the kernel.	66	* Switch to BEV normal level so that exception vectors point to the kernel.
67	* Clear the error level.	67	* Clear the error level.
68	*/	68	*/
69	cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit\|cp0_status_erl_error_bit));	69	cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit\|cp0_status_erl_error_bit));
70		70
71	/*	71	/*
72	* Mask all interrupts	72	* Mask all interrupts
73	*/	73	*/
74	cp0_mask_all_int();	74	cp0_mask_all_int();
75	/*	75	/*
76	* Unmask hardware clock interrupt.	76	* Unmask hardware clock interrupt.
77	*/	77	*/
78	cp0_unmask_int(TIMER_IRQ);	78	cp0_unmask_int(TIMER_IRQ);
79		79
80	/*	80	/*
81	* Start hardware clock.	81	* Start hardware clock.
82	*/	82	*/
83	cp0_compare_write(cp0_compare_value + cp0_count_read());	83	cp0_compare_write(cp0_compare_value + cp0_count_read());
84		84
85	console_init();	85	console_init();
86	keyboard_init();	86	keyboard_init();
87	arc_print_memory_map();	87	arc_print_memory_map();
88	arc_print_devices();	88	arc_print_devices();
89	}	89	}
90		90
91	void arch_post_mm_init(void)	91	void arch_post_mm_init(void)
92	{	92	{
93	}	93	}
94		94
95	void arch_pre_smp_init(void)	95	void arch_pre_smp_init(void)
96	{	96	{
97	}	97	}
98		98
99	void arch_post_smp_init(void)	99	void arch_post_smp_init(void)
100	{	100	{
101	}	101	}
102		102
103	void userspace(void)	103	void userspace(void)
104	{	104	{
105	/* EXL=1, UM=1, IE=1 */	105	/* EXL=1, UM=1, IE=1 */
106	cp0_status_write(cp0_status_read() \| (cp0_status_exl_exception_bit \|	106	cp0_status_write(cp0_status_read() \| (cp0_status_exl_exception_bit \|
107	cp0_status_um_bit \|	107	cp0_status_um_bit \|
108	cp0_status_ie_enabled_bit));	108	cp0_status_ie_enabled_bit));
109		109
110	cp0_epc_write(UTEXT_ADDRESS);	110	cp0_epc_write(UTEXT_ADDRESS);
111	userspace_asm(USTACK_ADDRESS+PAGE_SIZE);	111	userspace_asm(USTACK_ADDRESS+PAGE_SIZE);
112	while (1)	112	while (1)
113	;	113	;
114	}	114	}
115		115
116	/* Stack pointer saved when entering user mode */	116	/* Stack pointer saved when entering user mode */
117	/* TODO: How do we do it on SMP system???? */	117	/* TODO: How do we do it on SMP system???? */
118	__address supervisor_sp;	118	__address supervisor_sp;
119		119
120	void before_thread_runs_arch(void)	120	void before_thread_runs_arch(void)
121	{	121	{
122	supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];	122	supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
123	}	123	}
124		124

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/src/mips32.c – Rev 534 → 573