WebSVN – HelenOS – Diff – /tags/0.2.0.1/kernel/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/boot.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 <sysinfo/sysinfo.h>
 
#include <arch/interrupt.h>
#include <arch/drivers/arc.h>
#include <console/chardev.h>
#include <arch/debugger.h>
#include <genarch/fb/fb.h>
#include <debug.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)
 
bootinfo_t bootinfo;
 
void arch_pre_main(void)
{
    /* Setup usermode */
    init.cnt = bootinfo.cnt;
   
    __u32 i;
   
    for (i = 0; i < bootinfo.cnt; i++) {
        init.tasks[i].addr = bootinfo.tasks[i].addr;
        init.tasks[i].size = bootinfo.tasks[i].size;
    }
}
 
void arch_pre_mm_init(void)
{
    /* It is not assumed by default */
    interrupts_disable();
   
    /* Initialize dispatch table */
    exception_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);
 
    interrupt_init();
    /*
     * 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);
 
    console_init();
    debugger_init();
}
 
void arch_post_mm_init(void)
{
#ifdef CONFIG_FB
        fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer
#endif
        sysinfo_set_item_val("machine." STRING(MACHINE),NULL,1);
}
 
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 1965	Rev 1968
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/boot.h>	31	#include <arch/boot.h>
32	#include <arch/cp0.h>	32	#include <arch/cp0.h>
33	#include <arch/exception.h>	33	#include <arch/exception.h>
34	#include <arch/asm.h>	34	#include <arch/asm.h>
35	#include <mm/as.h>	35	#include <mm/as.h>
36		36
37	#include <userspace.h>	37	#include <userspace.h>
38	#include <arch/console.h>	38	#include <arch/console.h>
39	#include <memstr.h>	39	#include <memstr.h>
40	#include <proc/thread.h>	40	#include <proc/thread.h>
41	#include <proc/uarg.h>	41	#include <proc/uarg.h>
42	#include <print.h>	42	#include <print.h>
43	#include <syscall/syscall.h>	43	#include <syscall/syscall.h>
44	#include <sysinfo/sysinfo.h>	44	#include <sysinfo/sysinfo.h>
45		45
46	#include <arch/interrupt.h>	46	#include <arch/interrupt.h>
47	#include <arch/drivers/arc.h>	47	#include <arch/drivers/arc.h>
48	#include <console/chardev.h>	48	#include <console/chardev.h>
49	#include <arch/debugger.h>	49	#include <arch/debugger.h>
50	#include <genarch/fb/fb.h>	50	#include <genarch/fb/fb.h>
51	#include <debug.h>	51	#include <debug.h>
52		52
53	#include <arch/asm/regname.h>	53	#include <arch/asm/regname.h>
54		54
55	/* Size of the code jumping to the exception handler code	55	/* Size of the code jumping to the exception handler code
56	* - J+NOP	56	* - J+NOP
57	*/	57	*/
58	#define EXCEPTION_JUMP_SIZE 8	58	#define EXCEPTION_JUMP_SIZE 8
59		59
60	#define TLB_EXC ((char *) 0x80000000)	60	#define TLB_EXC ((char *) 0x80000000)
61	#define NORM_EXC ((char *) 0x80000180)	61	#define NORM_EXC ((char *) 0x80000180)
62	#define CACHE_EXC ((char *) 0x80000100)	62	#define CACHE_EXC ((char *) 0x80000100)
63		63
64	bootinfo_t bootinfo;	64	bootinfo_t bootinfo;
65		65
66	void arch_pre_main(void)	66	void arch_pre_main(void)
67	{	67	{
68	/* Setup usermode */	68	/* Setup usermode */
69	init.cnt = bootinfo.cnt;	69	init.cnt = bootinfo.cnt;
70		70
71	__u32 i;	71	__u32 i;
72		72
73	for (i = 0; i < bootinfo.cnt; i++) {	73	for (i = 0; i < bootinfo.cnt; i++) {
74	init.tasks[i].addr = bootinfo.tasks[i].addr;	74	init.tasks[i].addr = bootinfo.tasks[i].addr;
75	init.tasks[i].size = bootinfo.tasks[i].size;	75	init.tasks[i].size = bootinfo.tasks[i].size;
76	}	76	}
77	}	77	}
78		78
79	void arch_pre_mm_init(void)	79	void arch_pre_mm_init(void)
80	{	80	{
81	/* It is not assumed by default */	81	/* It is not assumed by default */
82	interrupts_disable();	82	interrupts_disable();
83		83
84	/* Initialize dispatch table */	84	/* Initialize dispatch table */
85	exception_init();	85	exception_init();
86	arc_init();	86	arc_init();
87		87
88	/* Copy the exception vectors to the right places */	88	/* Copy the exception vectors to the right places */
89	memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);	89	memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
90	memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);	90	memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
91	memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);	91	memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
92		92
93	interrupt_init();	93	interrupt_init();
94	/*	94	/*
95	* Switch to BEV normal level so that exception vectors point to the kernel.	95	* Switch to BEV normal level so that exception vectors point to the kernel.
96	* Clear the error level.	96	* Clear the error level.
97	*/	97	*/
98	cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit\|cp0_status_erl_error_bit));	98	cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit\|cp0_status_erl_error_bit));
99		99
100	/*	100	/*
101	* Mask all interrupts	101	* Mask all interrupts
102	*/	102	*/
103	cp0_mask_all_int();	103	cp0_mask_all_int();
104		104
105	/*	105	/*
106	* Unmask hardware clock interrupt.	106	* Unmask hardware clock interrupt.
107	*/	107	*/
108	cp0_unmask_int(TIMER_IRQ);	108	cp0_unmask_int(TIMER_IRQ);
109		109
110	console_init();	110	console_init();
111	debugger_init();	111	debugger_init();
112	}	112	}
113		113
114	void arch_post_mm_init(void)	114	void arch_post_mm_init(void)
115	{	115	{
116	#ifdef CONFIG_FB	116	#ifdef CONFIG_FB
117	fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer	117	fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer
118	#endif	118	#endif
119	sysinfo_set_item_val("machine." STRING(MACHINE),NULL,1);	119	sysinfo_set_item_val("machine." STRING(MACHINE),NULL,1);
120	}	120	}
121		121
122	void arch_pre_smp_init(void)	122	void arch_pre_smp_init(void)
123	{	123	{
124	}	124	}
125		125
126	void arch_post_smp_init(void)	126	void arch_post_smp_init(void)
127	{	127	{
128	}	128	}
129		129
130	/* Stack pointer saved when entering user mode */	130	/* Stack pointer saved when entering user mode */
131	/* TODO: How do we do it on SMP system???? */	131	/* TODO: How do we do it on SMP system???? */
132		132
133	/* Why the linker moves the variable 64K away in assembler	133	/* Why the linker moves the variable 64K away in assembler
134	* when not in .text section ????????	134	* when not in .text section ????????
135	*/	135	*/
136	__address supervisor_sp __attribute__ ((section (".text")));	136	__address supervisor_sp __attribute__ ((section (".text")));
137		137
138	void userspace(uspace_arg_t *kernel_uarg)	138	void userspace(uspace_arg_t *kernel_uarg)
139	{	139	{
140	/* EXL=1, UM=1, IE=1 */	140	/* EXL=1, UM=1, IE=1 */
141	cp0_status_write(cp0_status_read() \| (cp0_status_exl_exception_bit \|	141	cp0_status_write(cp0_status_read() \| (cp0_status_exl_exception_bit \|
142	cp0_status_um_bit \|	142	cp0_status_um_bit \|
143	cp0_status_ie_enabled_bit));	143	cp0_status_ie_enabled_bit));
144	cp0_epc_write((__address) kernel_uarg->uspace_entry);	144	cp0_epc_write((__address) kernel_uarg->uspace_entry);
145	userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE),	145	userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE),
146	(__address) kernel_uarg->uspace_uarg,	146	(__address) kernel_uarg->uspace_uarg,
147	(__address) kernel_uarg->uspace_entry);	147	(__address) kernel_uarg->uspace_entry);
148	while (1)	148	while (1)
149	;	149	;
150	}	150	}
151		151
152	/** Perform mips32 specific tasks needed before the new task is run. */	152	/** Perform mips32 specific tasks needed before the new task is run. */
153	void before_task_runs_arch(void)	153	void before_task_runs_arch(void)
154	{	154	{
155	}	155	}
156		156
157	/** Perform mips32 specific tasks needed before the new thread is scheduled. */	157	/** Perform mips32 specific tasks needed before the new thread is scheduled. */
158	void before_thread_runs_arch(void)	158	void before_thread_runs_arch(void)
159	{	159	{
160	supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];	160	supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
161	}	161	}
162		162
163	void after_thread_ran_arch(void)	163	void after_thread_ran_arch(void)
164	{	164	{
165	}	165	}
166		166
167	/** Set thread-local-storage pointer	167	/** Set thread-local-storage pointer
168	*	168	*
169	* We have it currently in K1, it is	169	* We have it currently in K1, it is
170	* possible to have it separately in the future.	170	* possible to have it separately in the future.
171	*/	171	*/
172	__native sys_tls_set(__native addr)	172	__native sys_tls_set(__native addr)
173	{	173	{
174	return 0;	174	return 0;
175	}	175	}
176		176
177		177

Subversion Repositories HelenOS

(root)/tags/0.2.0.1/kernel/arch/mips32/src/mips32.c – Rev 1965 → 1968