Rev 1704 | Rev 1742 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1 | jermar | 1 | /* |
319 | jermar | 2 | * Copyright (C) 2003-2004 Jakub Jermar |
1 | jermar | 3 | * All rights reserved. |
4 | * |
||
5 | * Redistribution and use in source and binary forms, with or without |
||
6 | * modification, are permitted provided that the following conditions |
||
7 | * are met: |
||
8 | * |
||
9 | * - Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * - Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
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 |
||
15 | * derived from this software without specific prior written permission. |
||
16 | * |
||
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 |
||
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
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 |
||
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 |
||
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | */ |
||
28 | |||
1705 | cejka | 29 | /** @addtogroup mips32 |
1702 | cejka | 30 | * @{ |
31 | */ |
||
32 | /** @file |
||
33 | */ |
||
575 | palkovsky | 34 | |
1702 | cejka | 35 | |
1 | jermar | 36 | #include <arch.h> |
1686 | decky | 37 | #include <arch/boot.h> |
1 | jermar | 38 | #include <arch/cp0.h> |
39 | #include <arch/exception.h> |
||
313 | palkovsky | 40 | #include <arch/asm.h> |
703 | jermar | 41 | #include <mm/as.h> |
575 | palkovsky | 42 | |
313 | palkovsky | 43 | #include <userspace.h> |
324 | palkovsky | 44 | #include <arch/console.h> |
326 | palkovsky | 45 | #include <memstr.h> |
391 | jermar | 46 | #include <proc/thread.h> |
1078 | jermar | 47 | #include <proc/uarg.h> |
330 | palkovsky | 48 | #include <print.h> |
1112 | palkovsky | 49 | #include <syscall/syscall.h> |
1642 | vana | 50 | #include <sysinfo/sysinfo.h> |
330 | palkovsky | 51 | |
575 | palkovsky | 52 | #include <arch/interrupt.h> |
53 | #include <arch/drivers/arc.h> |
||
54 | #include <console/chardev.h> |
||
614 | palkovsky | 55 | #include <arch/debugger.h> |
1396 | palkovsky | 56 | #include <genarch/fb/fb.h> |
1642 | vana | 57 | #include <debug.h> |
575 | palkovsky | 58 | |
59 | #include <arch/asm/regname.h> |
||
60 | |||
326 | palkovsky | 61 | /* Size of the code jumping to the exception handler code |
62 | * - J+NOP |
||
63 | */ |
||
64 | #define EXCEPTION_JUMP_SIZE 8 |
||
65 | |||
66 | #define TLB_EXC ((char *) 0x80000000) |
||
67 | #define NORM_EXC ((char *) 0x80000180) |
||
68 | #define CACHE_EXC ((char *) 0x80000100) |
||
69 | |||
1686 | decky | 70 | bootinfo_t bootinfo; |
71 | |||
1222 | decky | 72 | void arch_pre_main(void) |
73 | { |
||
74 | /* Setup usermode */ |
||
1686 | decky | 75 | init.cnt = bootinfo.cnt; |
76 | |||
77 | __u32 i; |
||
78 | |||
79 | for (i = 0; i < bootinfo.cnt; i++) { |
||
80 | init.tasks[i].addr = bootinfo.tasks[i].addr; |
||
81 | init.tasks[i].size = bootinfo.tasks[i].size; |
||
82 | } |
||
1222 | decky | 83 | } |
84 | |||
26 | jermar | 85 | void arch_pre_mm_init(void) |
1 | jermar | 86 | { |
329 | palkovsky | 87 | /* It is not assumed by default */ |
413 | jermar | 88 | interrupts_disable(); |
575 | palkovsky | 89 | |
90 | /* Initialize dispatch table */ |
||
590 | palkovsky | 91 | exception_init(); |
573 | palkovsky | 92 | arc_init(); |
332 | palkovsky | 93 | |
326 | palkovsky | 94 | /* Copy the exception vectors to the right places */ |
95 | memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE); |
||
96 | memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE); |
||
97 | memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE); |
||
98 | |||
1434 | palkovsky | 99 | interrupt_init(); |
1 | jermar | 100 | /* |
101 | * Switch to BEV normal level so that exception vectors point to the kernel. |
||
102 | * Clear the error level. |
||
103 | */ |
||
104 | cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit)); |
||
125 | jermar | 105 | |
329 | palkovsky | 106 | /* |
107 | * Mask all interrupts |
||
108 | */ |
||
109 | cp0_mask_all_int(); |
||
1434 | palkovsky | 110 | |
1 | jermar | 111 | /* |
112 | * Unmask hardware clock interrupt. |
||
113 | */ |
||
509 | jermar | 114 | cp0_unmask_int(TIMER_IRQ); |
125 | jermar | 115 | |
324 | palkovsky | 116 | console_init(); |
614 | palkovsky | 117 | debugger_init(); |
1 | jermar | 118 | } |
23 | jermar | 119 | |
120 | void arch_post_mm_init(void) |
||
121 | { |
||
1396 | palkovsky | 122 | #ifdef CONFIG_FB |
123 | fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer |
||
124 | #endif |
||
1642 | vana | 125 | sysinfo_set_item_val("machine." STRING(MACHINE),NULL,1); |
23 | jermar | 126 | } |
32 | jermar | 127 | |
503 | jermar | 128 | void arch_pre_smp_init(void) |
32 | jermar | 129 | { |
130 | } |
||
313 | palkovsky | 131 | |
503 | jermar | 132 | void arch_post_smp_init(void) |
133 | { |
||
134 | } |
||
135 | |||
794 | palkovsky | 136 | /* Stack pointer saved when entering user mode */ |
137 | /* TODO: How do we do it on SMP system???? */ |
||
138 | |||
812 | jermar | 139 | /* Why the linker moves the variable 64K away in assembler |
794 | palkovsky | 140 | * when not in .text section ???????? |
141 | */ |
||
142 | __address supervisor_sp __attribute__ ((section (".text"))); |
||
143 | |||
1078 | jermar | 144 | void userspace(uspace_arg_t *kernel_uarg) |
313 | palkovsky | 145 | { |
146 | /* EXL=1, UM=1, IE=1 */ |
||
147 | cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit | |
||
148 | cp0_status_um_bit | |
||
149 | cp0_status_ie_enabled_bit)); |
||
1078 | jermar | 150 | cp0_epc_write((__address) kernel_uarg->uspace_entry); |
1122 | palkovsky | 151 | userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE), |
152 | (__address) kernel_uarg->uspace_uarg, |
||
153 | (__address) kernel_uarg->uspace_entry); |
||
313 | palkovsky | 154 | while (1) |
155 | ; |
||
156 | } |
||
157 | |||
1187 | jermar | 158 | /** Perform mips32 specific tasks needed before the new task is run. */ |
159 | void before_task_runs_arch(void) |
||
160 | { |
||
161 | } |
||
162 | |||
163 | /** Perform mips32 specific tasks needed before the new thread is scheduled. */ |
||
313 | palkovsky | 164 | void before_thread_runs_arch(void) |
165 | { |
||
166 | supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
||
167 | } |
||
897 | jermar | 168 | |
169 | void after_thread_ran_arch(void) |
||
170 | { |
||
171 | } |
||
1112 | palkovsky | 172 | |
1121 | jermar | 173 | /** Set thread-local-storage pointer |
1112 | palkovsky | 174 | * |
175 | * We have it currently in K1, it is |
||
176 | * possible to have it separately in the future. |
||
177 | */ |
||
178 | __native sys_tls_set(__native addr) |
||
179 | { |
||
180 | return 0; |
||
181 | } |
||
1474 | palkovsky | 182 | |
1702 | cejka | 183 | |
184 | /** @} |
||
185 | */ |
||
186 |