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.h>
#include <mm/as.h>
 
#include <userspace.h>
#include <arch/console.h>
#include <memstr.h>
#include <proc/thread.h>
#include <proc/uarg.h>
#include <print.h>
#include <syscall/syscall.h>
 
#include <arch/interrupt.h>
#include <arch/drivers/arc.h>
#include <console/chardev.h>
#include <arch/debugger.h>
#include <genarch/fb/fb.h>
 
#include <arch/asm/regname.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_main(void)
{
    /* Setup usermode */
    init.cnt = 4;
    init.tasks[0].addr = INIT_ADDRESS;
    init.tasks[0].size = INIT_SIZE;
    init.tasks[1].addr = INIT_ADDRESS + 0x100000;
    init.tasks[1].size = INIT_SIZE;
    init.tasks[2].addr = INIT_ADDRESS + 0x200000;
    init.tasks[2].size = INIT_SIZE;
    init.tasks[3].addr = INIT_ADDRESS + 0x300000;
    init.tasks[3].size = INIT_SIZE;
 
}
 
void arch_pre_mm_init(void)
{
    /* It is not assumed by default */
    interrupts_disable();
   
    /* Initialize dispatch table */
    exception_init();
    interrupt_init();
 
    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();
    debugger_init();
}
 
void arch_post_mm_init(void)
{
#ifdef CONFIG_FB
        fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer
#endif
}
 
void arch_pre_smp_init(void)
{
}
 
void arch_post_smp_init(void)
{
}
 
/* Stack pointer saved when entering user mode */
/* TODO: How do we do it on SMP system???? */
 
/* Why the linker moves the variable 64K away in assembler
 * when not in .text section ????????
 */
__address supervisor_sp __attribute__ ((section (".text")));
 
void userspace(uspace_arg_t *kernel_uarg)
{
    /* 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((__address) kernel_uarg->uspace_entry);
    userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE),
              (__address) kernel_uarg->uspace_uarg,
              (__address) kernel_uarg->uspace_entry);
    while (1)
        ;
}
 
/** Perform mips32 specific tasks needed before the new task is run. */
void before_task_runs_arch(void)
{
}
 
/** Perform mips32 specific tasks needed before the new thread is scheduled. */
void before_thread_runs_arch(void)
{
    supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
}
 
void after_thread_ran_arch(void)
{
}
 
/** Set thread-local-storage pointer
 *
 * We have it currently in K1, it is
 * possible to have it separately in the future.
 */
__native sys_tls_set(__native addr)
{
    return 0;
}
 

Rev 1396	Rev 1432
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		29
30	#include <arch.h>	30	#include <arch.h>
31	#include <arch/cp0.h>	31	#include <arch/cp0.h>
32	#include <arch/exception.h>	32	#include <arch/exception.h>
33	#include <arch/asm.h>	33	#include <arch/asm.h>
34	#include <mm/as.h>	34	#include <mm/as.h>
35		35
36	#include <userspace.h>	36	#include <userspace.h>
37	#include <arch/console.h>	37	#include <arch/console.h>
38	#include <memstr.h>	38	#include <memstr.h>
39	#include <proc/thread.h>	39	#include <proc/thread.h>
40	#include <proc/uarg.h>	40	#include <proc/uarg.h>
41	#include <print.h>	41	#include <print.h>
42	#include <syscall/syscall.h>	42	#include <syscall/syscall.h>
43		43
44	#include <arch/interrupt.h>	44	#include <arch/interrupt.h>
45	#include <arch/drivers/arc.h>	45	#include <arch/drivers/arc.h>
46	#include <console/chardev.h>	46	#include <console/chardev.h>
47	#include <arch/debugger.h>	47	#include <arch/debugger.h>
48	#include <genarch/fb/fb.h>	48	#include <genarch/fb/fb.h>
49		49
50	#include <arch/asm/regname.h>	50	#include <arch/asm/regname.h>
51		51
52	/* Size of the code jumping to the exception handler code	52	/* Size of the code jumping to the exception handler code
53	* - J+NOP	53	* - J+NOP
54	*/	54	*/
55	#define EXCEPTION_JUMP_SIZE 8	55	#define EXCEPTION_JUMP_SIZE 8
56		56
57	#define TLB_EXC ((char *) 0x80000000)	57	#define TLB_EXC ((char *) 0x80000000)
58	#define NORM_EXC ((char *) 0x80000180)	58	#define NORM_EXC ((char *) 0x80000180)
59	#define CACHE_EXC ((char *) 0x80000100)	59	#define CACHE_EXC ((char *) 0x80000100)
60		60
61	void arch_pre_main(void)	61	void arch_pre_main(void)
62	{	62	{
63	/* Setup usermode */	63	/* Setup usermode */
64	init.cnt = 3;	64	init.cnt = 4;
65	init.tasks[0].addr = INIT_ADDRESS;	65	init.tasks[0].addr = INIT_ADDRESS;
66	init.tasks[0].size = INIT_SIZE;	66	init.tasks[0].size = INIT_SIZE;
67	init.tasks[1].addr = INIT_ADDRESS + 0x100000;	67	init.tasks[1].addr = INIT_ADDRESS + 0x100000;
68	init.tasks[1].size = INIT_SIZE;	68	init.tasks[1].size = INIT_SIZE;
69	init.tasks[2].addr = INIT_ADDRESS + 0x200000;	69	init.tasks[2].addr = INIT_ADDRESS + 0x200000;
70	init.tasks[2].size = INIT_SIZE;	70	init.tasks[2].size = INIT_SIZE;
-		71	init.tasks[3].addr = INIT_ADDRESS + 0x300000;
-		72	init.tasks[3].size = INIT_SIZE;
-		73
71	}	74	}
72		75
73	void arch_pre_mm_init(void)	76	void arch_pre_mm_init(void)
74	{	77	{
75	/* It is not assumed by default */	78	/* It is not assumed by default */
76	interrupts_disable();	79	interrupts_disable();
77		80
78	/* Initialize dispatch table */	81	/* Initialize dispatch table */
79	exception_init();	82	exception_init();
80	interrupt_init();	83	interrupt_init();
81		84
82	arc_init();	85	arc_init();
83		86
84	/* Copy the exception vectors to the right places */	87	/* Copy the exception vectors to the right places */
85	memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);	88	memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
86	memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);	89	memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
87	memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);	90	memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
88		91
89	/*	92	/*
90	* Switch to BEV normal level so that exception vectors point to the kernel.	93	* Switch to BEV normal level so that exception vectors point to the kernel.
91	* Clear the error level.	94	* Clear the error level.
92	*/	95	*/
93	cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit\|cp0_status_erl_error_bit));	96	cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit\|cp0_status_erl_error_bit));
94		97
95	/*	98	/*
96	* Mask all interrupts	99	* Mask all interrupts
97	*/	100	*/
98	cp0_mask_all_int();	101	cp0_mask_all_int();
99	/*	102	/*
100	* Unmask hardware clock interrupt.	103	* Unmask hardware clock interrupt.
101	*/	104	*/
102	cp0_unmask_int(TIMER_IRQ);	105	cp0_unmask_int(TIMER_IRQ);
103		106
104	/*	107	/*
105	* Start hardware clock.	108	* Start hardware clock.
106	*/	109	*/
107	cp0_compare_write(cp0_compare_value + cp0_count_read());	110	cp0_compare_write(cp0_compare_value + cp0_count_read());
108		111
109	console_init();	112	console_init();
110	debugger_init();	113	debugger_init();
111	}	114	}
112		115
113	void arch_post_mm_init(void)	116	void arch_post_mm_init(void)
114	{	117	{
115	#ifdef CONFIG_FB	118	#ifdef CONFIG_FB
116	fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer	119	fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer
117	#endif	120	#endif
118	}	121	}
119		122
120	void arch_pre_smp_init(void)	123	void arch_pre_smp_init(void)
121	{	124	{
122	}	125	}
123		126
124	void arch_post_smp_init(void)	127	void arch_post_smp_init(void)
125	{	128	{
126	}	129	}
127		130
128	/* Stack pointer saved when entering user mode */	131	/* Stack pointer saved when entering user mode */
129	/* TODO: How do we do it on SMP system???? */	132	/* TODO: How do we do it on SMP system???? */
130		133
131	/* Why the linker moves the variable 64K away in assembler	134	/* Why the linker moves the variable 64K away in assembler
132	* when not in .text section ????????	135	* when not in .text section ????????
133	*/	136	*/
134	__address supervisor_sp __attribute__ ((section (".text")));	137	__address supervisor_sp __attribute__ ((section (".text")));
135		138
136	void userspace(uspace_arg_t *kernel_uarg)	139	void userspace(uspace_arg_t *kernel_uarg)
137	{	140	{
138	/* EXL=1, UM=1, IE=1 */	141	/* EXL=1, UM=1, IE=1 */
139	cp0_status_write(cp0_status_read() \| (cp0_status_exl_exception_bit \|	142	cp0_status_write(cp0_status_read() \| (cp0_status_exl_exception_bit \|
140	cp0_status_um_bit \|	143	cp0_status_um_bit \|
141	cp0_status_ie_enabled_bit));	144	cp0_status_ie_enabled_bit));
142	cp0_epc_write((__address) kernel_uarg->uspace_entry);	145	cp0_epc_write((__address) kernel_uarg->uspace_entry);
143	userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE),	146	userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE),
144	(__address) kernel_uarg->uspace_uarg,	147	(__address) kernel_uarg->uspace_uarg,
145	(__address) kernel_uarg->uspace_entry);	148	(__address) kernel_uarg->uspace_entry);
146	while (1)	149	while (1)
147	;	150	;
148	}	151	}
149		152
150	/** Perform mips32 specific tasks needed before the new task is run. */	153	/** Perform mips32 specific tasks needed before the new task is run. */
151	void before_task_runs_arch(void)	154	void before_task_runs_arch(void)
152	{	155	{
153	}	156	}
154		157
155	/** Perform mips32 specific tasks needed before the new thread is scheduled. */	158	/** Perform mips32 specific tasks needed before the new thread is scheduled. */
156	void before_thread_runs_arch(void)	159	void before_thread_runs_arch(void)
157	{	160	{
158	supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];	161	supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
159	}	162	}
160		163
161	void after_thread_ran_arch(void)	164	void after_thread_ran_arch(void)
162	{	165	{
163	}	166	}
164		167
165	/** Set thread-local-storage pointer	168	/** Set thread-local-storage pointer
166	*	169	*
167	* We have it currently in K1, it is	170	* We have it currently in K1, it is
168	* possible to have it separately in the future.	171	* possible to have it separately in the future.
169	*/	172	*/
170	__native sys_tls_set(__native addr)	173	__native sys_tls_set(__native addr)
171	{	174	{
172	return 0;	175	return 0;
173	}	176	}
174		177

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/src/mips32.c – Rev 1396 → 1432