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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 | /** @addtogroup mips32 |
29 | /** @addtogroup mips32 |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <arch.h> |
35 | #include <arch.h> |
36 | #include <arch/boot.h> |
36 | #include <arch/boot.h> |
37 | #include <arch/cp0.h> |
37 | #include <arch/cp0.h> |
38 | #include <arch/exception.h> |
38 | #include <arch/exception.h> |
39 | #include <mm/as.h> |
39 | #include <mm/as.h> |
40 | 40 | ||
41 | #include <userspace.h> |
41 | #include <userspace.h> |
42 | #include <arch/console.h> |
42 | #include <arch/console.h> |
43 | #include <memstr.h> |
43 | #include <memstr.h> |
44 | #include <proc/thread.h> |
44 | #include <proc/thread.h> |
45 | #include <proc/uarg.h> |
45 | #include <proc/uarg.h> |
46 | #include <print.h> |
46 | #include <print.h> |
47 | #include <syscall/syscall.h> |
47 | #include <syscall/syscall.h> |
48 | #include <sysinfo/sysinfo.h> |
48 | #include <sysinfo/sysinfo.h> |
49 | 49 | ||
50 | #include <arch/interrupt.h> |
50 | #include <arch/interrupt.h> |
51 | #include <arch/drivers/arc.h> |
51 | #include <arch/drivers/arc.h> |
52 | #include <console/chardev.h> |
52 | #include <console/chardev.h> |
53 | #include <arch/debugger.h> |
53 | #include <arch/debugger.h> |
54 | #include <genarch/fb/fb.h> |
54 | #include <genarch/fb/fb.h> |
55 | #include <genarch/fb/visuals.h> |
55 | #include <genarch/fb/visuals.h> |
56 | #include <macros.h> |
56 | #include <macros.h> |
57 | #include <ddi/device.h> |
57 | #include <ddi/device.h> |
58 | 58 | ||
59 | #include <arch/asm/regname.h> |
59 | #include <arch/asm/regname.h> |
60 | 60 | ||
61 | /* Size of the code jumping to the exception handler code |
61 | /* Size of the code jumping to the exception handler code |
62 | * - J+NOP |
62 | * - J+NOP |
63 | */ |
63 | */ |
64 | #define EXCEPTION_JUMP_SIZE 8 |
64 | #define EXCEPTION_JUMP_SIZE 8 |
65 | 65 | ||
66 | #define TLB_EXC ((char *) 0x80000000) |
66 | #define TLB_EXC ((char *) 0x80000000) |
67 | #define NORM_EXC ((char *) 0x80000180) |
67 | #define NORM_EXC ((char *) 0x80000180) |
68 | #define CACHE_EXC ((char *) 0x80000100) |
68 | #define CACHE_EXC ((char *) 0x80000100) |
69 | 69 | ||
70 | 70 | ||
71 | /* Why the linker moves the variable 64K away in assembler |
71 | /* Why the linker moves the variable 64K away in assembler |
72 | * when not in .text section ???????? |
72 | * when not in .text section ???????? |
73 | */ |
73 | */ |
74 | uintptr_t supervisor_sp __attribute__ ((section (".text"))); |
74 | uintptr_t supervisor_sp __attribute__ ((section (".text"))); |
75 | /* Stack pointer saved when entering user mode */ |
75 | /* Stack pointer saved when entering user mode */ |
76 | /* TODO: How do we do it on SMP system???? */ |
76 | /* TODO: How do we do it on SMP system???? */ |
77 | bootinfo_t bootinfo __attribute__ ((section (".text"))); |
77 | bootinfo_t bootinfo __attribute__ ((section (".text"))); |
78 | 78 | ||
79 | void arch_pre_main(void) |
79 | void arch_pre_main(void) |
80 | { |
80 | { |
81 | /* Setup usermode */ |
81 | /* Setup usermode */ |
82 | init.cnt = bootinfo.cnt; |
82 | init.cnt = bootinfo.cnt; |
83 | 83 | ||
84 | uint32_t i; |
84 | uint32_t i; |
85 | 85 | ||
86 | for (i = 0; i < bootinfo.cnt; i++) { |
86 | for (i = 0; i < bootinfo.cnt; i++) { |
87 | init.tasks[i].addr = bootinfo.tasks[i].addr; |
87 | init.tasks[i].addr = bootinfo.tasks[i].addr; |
88 | init.tasks[i].size = bootinfo.tasks[i].size; |
88 | init.tasks[i].size = bootinfo.tasks[i].size; |
89 | } |
89 | } |
90 | } |
90 | } |
91 | 91 | ||
92 | void arch_pre_mm_init(void) |
92 | void arch_pre_mm_init(void) |
93 | { |
93 | { |
94 | /* It is not assumed by default */ |
94 | /* It is not assumed by default */ |
95 | interrupts_disable(); |
95 | interrupts_disable(); |
96 | 96 | ||
97 | /* Initialize dispatch table */ |
97 | /* Initialize dispatch table */ |
98 | exception_init(); |
98 | exception_init(); |
99 | arc_init(); |
99 | arc_init(); |
100 | 100 | ||
101 | /* Copy the exception vectors to the right places */ |
101 | /* Copy the exception vectors to the right places */ |
102 | memcpy(TLB_EXC, (char *) tlb_refill_entry, EXCEPTION_JUMP_SIZE); |
102 | memcpy(TLB_EXC, (char *) tlb_refill_entry, EXCEPTION_JUMP_SIZE); |
103 | memcpy(NORM_EXC, (char *) exception_entry, EXCEPTION_JUMP_SIZE); |
103 | memcpy(NORM_EXC, (char *) exception_entry, EXCEPTION_JUMP_SIZE); |
104 | memcpy(CACHE_EXC, (char *) cache_error_entry, EXCEPTION_JUMP_SIZE); |
104 | memcpy(CACHE_EXC, (char *) cache_error_entry, EXCEPTION_JUMP_SIZE); |
105 | 105 | ||
106 | /* |
106 | /* |
107 | * Switch to BEV normal level so that exception vectors point to the kernel. |
107 | * Switch to BEV normal level so that exception vectors point to the kernel. |
108 | * Clear the error level. |
108 | * Clear the error level. |
109 | */ |
109 | */ |
110 | cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit)); |
110 | cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit)); |
111 | 111 | ||
112 | /* |
112 | /* |
113 | * Mask all interrupts |
113 | * Mask all interrupts |
114 | */ |
114 | */ |
115 | cp0_mask_all_int(); |
115 | cp0_mask_all_int(); |
116 | 116 | ||
117 | debugger_init(); |
117 | debugger_init(); |
118 | } |
118 | } |
119 | 119 | ||
120 | void arch_post_mm_init(void) |
120 | void arch_post_mm_init(void) |
121 | { |
121 | { |
122 | interrupt_init(); |
122 | interrupt_init(); |
123 | console_init(device_assign_devno()); |
123 | console_init(device_assign_devno()); |
124 | #ifdef CONFIG_FB |
124 | #ifdef CONFIG_FB |
125 | fb_init(0x12000000, 640, 480, 1920, VISUAL_RGB_8_8_8); // gxemul framebuffer |
125 | fb_init(0x12000000, 640, 480, 1920, VISUAL_RGB_8_8_8); // gxemul framebuffer |
126 | #endif |
126 | #endif |
127 | sysinfo_set_item_val("machine." STRING(MACHINE), NULL, 1); |
127 | sysinfo_set_item_val("machine." STRING(MACHINE), NULL, 1); |
128 | } |
128 | } |
129 | 129 | ||
130 | void arch_post_cpu_init(void) |
130 | void arch_post_cpu_init(void) |
131 | { |
131 | { |
132 | } |
132 | } |
133 | 133 | ||
134 | void arch_pre_smp_init(void) |
134 | void arch_pre_smp_init(void) |
135 | { |
135 | { |
136 | } |
136 | } |
137 | 137 | ||
138 | void arch_post_smp_init(void) |
138 | void arch_post_smp_init(void) |
139 | { |
139 | { |
140 | } |
140 | } |
141 | 141 | ||
142 | void userspace(uspace_arg_t *kernel_uarg) |
142 | void userspace(uspace_arg_t *kernel_uarg) |
143 | { |
143 | { |
144 | /* EXL=1, UM=1, IE=1 */ |
144 | /* EXL = 1, UM = 1, IE = 1 */ |
145 | cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit | |
145 | cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit | |
146 | cp0_status_um_bit | |
- | |
147 | cp0_status_ie_enabled_bit)); |
146 | cp0_status_um_bit | cp0_status_ie_enabled_bit)); |
148 | cp0_epc_write((uintptr_t) kernel_uarg->uspace_entry); |
147 | cp0_epc_write((uintptr_t) kernel_uarg->uspace_entry); |
149 | userspace_asm(((uintptr_t) kernel_uarg->uspace_stack+PAGE_SIZE), |
148 | userspace_asm(((uintptr_t) kernel_uarg->uspace_stack + PAGE_SIZE), |
150 | (uintptr_t) kernel_uarg->uspace_uarg, |
149 | (uintptr_t) kernel_uarg->uspace_uarg, |
151 | (uintptr_t) kernel_uarg->uspace_entry); |
150 | (uintptr_t) kernel_uarg->uspace_entry); |
- | 151 | ||
152 | while (1) |
152 | while (1); |
153 | ; |
- | |
154 | } |
153 | } |
155 | 154 | ||
156 | /** Perform mips32 specific tasks needed before the new task is run. */ |
155 | /** Perform mips32 specific tasks needed before the new task is run. */ |
157 | void before_task_runs_arch(void) |
156 | void before_task_runs_arch(void) |
158 | { |
157 | { |
159 | } |
158 | } |
160 | 159 | ||
161 | /** Perform mips32 specific tasks needed before the new thread is scheduled. */ |
160 | /** Perform mips32 specific tasks needed before the new thread is scheduled. */ |
162 | void before_thread_runs_arch(void) |
161 | void before_thread_runs_arch(void) |
163 | { |
162 | { |
164 | supervisor_sp = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
163 | supervisor_sp = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
165 | } |
164 | } |
166 | 165 | ||
167 | void after_thread_ran_arch(void) |
166 | void after_thread_ran_arch(void) |
168 | { |
167 | { |
169 | } |
168 | } |
170 | 169 | ||
171 | /** Set thread-local-storage pointer |
170 | /** Set thread-local-storage pointer |
172 | * |
171 | * |
173 | * We have it currently in K1, it is |
172 | * We have it currently in K1, it is |
174 | * possible to have it separately in the future. |
173 | * possible to have it separately in the future. |
175 | */ |
174 | */ |
176 | unative_t sys_tls_set(unative_t addr) |
175 | unative_t sys_tls_set(unative_t addr) |
177 | { |
176 | { |
178 | return 0; |
177 | return 0; |
179 | } |
178 | } |
180 | 179 | ||
181 | void arch_reboot(void) |
180 | void arch_reboot(void) |
182 | { |
181 | { |
- | 182 | if (!arc_reboot()) |
|
183 | ___halt(); |
183 | ___halt(); |
- | 184 | ||
184 | while (1); |
185 | while (1); |
185 | } |
186 | } |
186 | 187 | ||
187 | /** @} |
188 | /** @} |
188 | */ |
189 | */ |
189 | 190 |