Rev 2326 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2128 | jermar | 1 | /* |
2159 | kebrt | 2 | * Copyright (c) 2007 Michal Kebrt |
2128 | 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 | |||
29 | /** @addtogroup arm32 |
||
30 | * @{ |
||
31 | */ |
||
32 | /** @file |
||
33 | */ |
||
34 | |||
35 | |||
36 | #include <arch.h> |
||
2159 | kebrt | 37 | #include <arch/boot.h> |
38 | #include <config.h> |
||
2173 | kebrt | 39 | #include <arch/console.h> |
40 | #include <ddi/device.h> |
||
2263 | kebrt | 41 | #include <genarch/fb/fb.h> |
42 | #include <genarch/fb/visuals.h> |
||
43 | #include <ddi/irq.h> |
||
2326 | kebrt | 44 | #include <arch/debug/print.h> |
2200 | jancik | 45 | #include <print.h> |
46 | #include <config.h> |
||
2245 | stepan | 47 | #include <interrupt.h> |
2280 | jancik | 48 | #include <arch/regutils.h> |
2294 | kebrt | 49 | #include <arch/machine.h> |
2280 | jancik | 50 | #include <userspace.h> |
2289 | stepan | 51 | |
2159 | kebrt | 52 | bootinfo_t bootinfo; |
2289 | stepan | 53 | // // uintptr_t supervisor_sp /*__attribute__ ((section (".text")))*/; |
54 | extern uintptr_t supervisor_sp; |
||
2159 | kebrt | 55 | |
2329 | kebrt | 56 | |
2128 | jermar | 57 | void arch_pre_main(void) |
58 | { |
||
2159 | kebrt | 59 | int i; |
60 | |||
61 | init.cnt = bootinfo.cnt; |
||
62 | |||
63 | for (i = 0; i < bootinfo.cnt; ++i) { |
||
64 | init.tasks[i].addr = bootinfo.tasks[i].addr; |
||
65 | init.tasks[i].size = bootinfo.tasks[i].size; |
||
66 | } |
||
2300 | kebrt | 67 | |
2128 | jermar | 68 | } |
69 | |||
2329 | kebrt | 70 | |
2128 | jermar | 71 | void arch_pre_mm_init(void) |
72 | { |
||
2245 | stepan | 73 | /* It is not assumed by default */ |
74 | interrupts_disable(); |
||
2284 | stepan | 75 | |
76 | setup_exception_stacks(); |
||
2128 | jermar | 77 | } |
78 | |||
2280 | jancik | 79 | |
2128 | jermar | 80 | void arch_post_mm_init(void) |
81 | { |
||
2294 | kebrt | 82 | machine_hw_map_init(); |
2284 | stepan | 83 | |
84 | /* Initialize dispatch table */ |
||
2270 | jancik | 85 | exception_init(); |
86 | |||
2263 | kebrt | 87 | interrupt_init(); |
2235 | stepan | 88 | |
2284 | stepan | 89 | console_init(device_assign_devno()); |
2290 | kebrt | 90 | |
2284 | stepan | 91 | interrupts_enable(); |
2128 | jermar | 92 | } |
93 | |||
2329 | kebrt | 94 | |
2128 | jermar | 95 | void arch_post_cpu_init(void) |
96 | { |
||
97 | } |
||
98 | |||
2329 | kebrt | 99 | |
2128 | jermar | 100 | void arch_pre_smp_init(void) |
101 | { |
||
102 | /* TODO */ |
||
103 | } |
||
104 | |||
2329 | kebrt | 105 | |
2128 | jermar | 106 | void arch_post_smp_init(void) |
107 | { |
||
108 | /* TODO */ |
||
109 | } |
||
110 | |||
2329 | kebrt | 111 | |
2128 | jermar | 112 | /** Perform arm32 specific tasks needed before the new task is run. */ |
113 | void before_task_runs_arch(void) |
||
114 | { |
||
2329 | kebrt | 115 | tlb_invalidate_all(); |
2128 | jermar | 116 | } |
117 | |||
2329 | kebrt | 118 | |
2128 | jermar | 119 | /** Perform arm32 specific tasks needed before the new thread is scheduled. */ |
120 | void before_thread_runs_arch(void) |
||
121 | { |
||
2298 | stepan | 122 | supervisor_sp = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
2128 | jermar | 123 | } |
124 | |||
2329 | kebrt | 125 | |
2128 | jermar | 126 | void after_thread_ran_arch(void) |
127 | { |
||
128 | } |
||
129 | |||
2329 | kebrt | 130 | |
2280 | jancik | 131 | /** Struct to hold general purpose register values */ |
132 | typedef struct { |
||
133 | uint32_t r0; |
||
134 | uint32_t r1; |
||
135 | uint32_t r2; |
||
136 | uint32_t r3; |
||
137 | uint32_t r4; |
||
138 | uint32_t r5; |
||
139 | uint32_t r6; |
||
140 | uint32_t r7; |
||
141 | uint32_t r8; |
||
142 | uint32_t r9; |
||
143 | uint32_t r10; |
||
144 | uint32_t r11; |
||
145 | uint32_t r12; |
||
146 | uint32_t sp; |
||
147 | uint32_t lr; |
||
148 | uint32_t pc; |
||
149 | } ustate_t; |
||
150 | |||
151 | |||
2304 | kebrt | 152 | /** Changes processor mode and jumps to the address specified in the first parameter. |
153 | * |
||
2329 | kebrt | 154 | * @param kernel_uarg Userspace settings (entry point, stack, ...). |
2280 | jancik | 155 | */ |
156 | void userspace(uspace_arg_t *kernel_uarg) |
||
157 | { |
||
2304 | kebrt | 158 | dprintf("Userspace: .uspace_uarg(%X), .uspace_entry(%X), .uspace_stack(%X)\n", |
159 | (unsigned int)(kernel_uarg->uspace_uarg), kernel_uarg->uspace_entry, |
||
160 | kernel_uarg->uspace_stack); |
||
2298 | stepan | 161 | |
2304 | kebrt | 162 | volatile ustate_t ustate; |
2298 | stepan | 163 | |
2304 | kebrt | 164 | // set first parameter |
2280 | jancik | 165 | ustate.r0 = (uintptr_t) kernel_uarg->uspace_uarg; |
2298 | stepan | 166 | |
2304 | kebrt | 167 | // clear other registers |
2280 | jancik | 168 | ustate.r1 = ustate.r2 = ustate.r3 = ustate.r4 = |
2304 | kebrt | 169 | ustate.r5 = ustate.r6 = ustate.r7 = ustate.r8 = |
170 | ustate.r9 = ustate.r10 = ustate.r11 = ustate.r12 = 1; |
||
2298 | stepan | 171 | |
2304 | kebrt | 172 | ustate.lr = 3; |
173 | |||
2298 | stepan | 174 | //set user stack |
2318 | jancik | 175 | ustate.sp = ((uint32_t)kernel_uarg->uspace_stack) + |
176 | PAGE_SIZE - sizeof(void*); |
||
177 | //on the bottom of stack there is pointer to TLS |
||
178 | |||
2304 | kebrt | 179 | //set where uspace execution starts |
180 | ustate.pc = (uintptr_t) kernel_uarg->uspace_entry; |
||
2280 | jancik | 181 | |
2298 | stepan | 182 | //status register in user mode |
2280 | jancik | 183 | ipl_t cpsr = current_status_reg_read(); |
2304 | kebrt | 184 | cpsr &= ~STATUS_REG_MODE_MASK | USER_MODE; |
2298 | stepan | 185 | |
186 | ipl_t tmpsr = (cpsr & ~STATUS_REG_MODE_MASK) | SUPERVISOR_MODE; |
||
2280 | jancik | 187 | |
188 | asm __volatile__ ( |
||
2298 | stepan | 189 | // save pointer into ustate struct |
190 | "mov r0, %0 \n" |
||
191 | // save cspr |
||
192 | "mov r1, %1 \n" |
||
193 | // change mode into any exception mode |
||
194 | "msr cpsr_c, %2 \n" |
||
195 | // set saved cpsr |
||
196 | "msr spsr_c, r1 \n" |
||
197 | |||
198 | "mov sp, r0 \n" |
||
199 | // replace almost all registers |
||
200 | "ldmfd sp!, {r0-r12, sp, lr}^\n" |
||
201 | //jump to the usermode |
||
202 | "ldmfd sp!, {pc}^" |
||
2280 | jancik | 203 | : // no output |
204 | : "r"(&ustate), "r"(cpsr), "r"(tmpsr) // |
||
205 | : "r0","r1" |
||
206 | ); |
||
2298 | stepan | 207 | |
208 | while(1) ; |
||
2280 | jancik | 209 | } |
2300 | kebrt | 210 | |
211 | |||
212 | void cpu_halt(void) |
||
213 | { |
||
214 | machine_cpu_halt(); |
||
215 | } |
||
216 | |||
2128 | jermar | 217 | /** @} |
218 | */ |
||
2280 | jancik | 219 | |
220 | |||
221 | |||
222 | |||
223 | |||
224 | |||
225 | |||
226 | |||
227 | |||
228 | |||
229 | |||
230 | |||
231 | |||
232 |