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2128 | jermar | 1 | /* |
2159 | kebrt | 2 | * Copyright (c) 2007 Michal Kebrt |
2128 | jermar | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup arm32 |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | |||
36 | #include <arch.h> |
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2159 | kebrt | 37 | #include <arch/boot.h> |
38 | #include <config.h> |
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2173 | kebrt | 39 | #include <arch/console.h> |
40 | #include <ddi/device.h> |
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2263 | kebrt | 41 | #include <genarch/fb/fb.h> |
42 | #include <genarch/fb/visuals.h> |
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43 | #include <ddi/irq.h> |
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2235 | stepan | 44 | |
2264 | kebrt | 45 | #include <arch/debug_print/print.h> |
2200 | jancik | 46 | #include <print.h> |
47 | #include <config.h> |
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2245 | stepan | 48 | #include <interrupt.h> |
2280 | jancik | 49 | #include <arch/regutils.h> |
50 | //#include <arch/drivers/init.h> |
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51 | #include <userspace.h> |
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2159 | kebrt | 52 | bootinfo_t bootinfo; |
53 | |||
2280 | jancik | 54 | //TODO: Remove include and move into exceptio.c |
55 | #include <arch/exception.h> |
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56 | |||
57 | #include <syscall/syscall.h> |
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58 | static void tmp_swi_exception(int exc_no, istate_t* istate) |
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59 | { |
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60 | ASSERT(exc_no == EXC_SWI); |
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61 | ASSERT(istate); |
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62 | // TODO: Alf ... remove aftet swi_exception is tested |
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63 | dprintf("\nSWI - istate dump input :\n"); |
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64 | dprintf(" r0:%X r1:%X r2:%X r3:%X\n", istate->r0, istate->r1, istate->r2, istate->r3); |
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65 | dprintf(" r4:%X r5:%X r6:%X r7:%X\n", istate->r4, istate->r5, istate->r6, istate->r7); |
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66 | dprintf(" r8:%X r8:%X r10:%X r11:%X\n", istate->r8, istate->r9, istate->r10, istate->r11); |
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67 | dprintf(" r12:%X r13:%X lr:%X spsr:%X\n", istate->r12, istate->sp, istate->lr, istate->spsr); |
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68 | dprintf(" prev_lr:%X prev_sp:%X\n", istate->r12, istate->prev_lr, istate->prev_sp); |
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69 | // call kernel to serve syscall |
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70 | istate->r0 = syscall_handler( |
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71 | istate->r0, |
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72 | istate->r1, |
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73 | istate->r2, |
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74 | istate->r3, |
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75 | istate->r4); |
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76 | |||
77 | // TODO: Alf ... remove aftet swi_exception is tested |
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78 | dprintf("\nSWI - Istate dump after :\n"); |
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79 | dprintf(" r0:%X r1:%X r2:%X r3:%X\n", istate->r0, istate->r1, istate->r2, istate->r3); |
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80 | dprintf(" r4:%X r5:%X r6:%X r7:%X\n", istate->r4, istate->r5, istate->r6, istate->r7); |
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81 | dprintf(" r8:%X r8:%X r10:%X r11:%X\n", istate->r8, istate->r9, istate->r10, istate->r11); |
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82 | dprintf(" r12:%X r13:%X lr:%X spsr:%X\n", istate->r12, istate->sp, istate->lr, istate->spsr); |
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83 | dprintf(" prev_lr:%X prev_sp:%X\n", istate->r12, istate->prev_lr, istate->prev_sp); |
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84 | } |
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85 | |||
86 | |||
2128 | jermar | 87 | void arch_pre_main(void) |
88 | { |
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2264 | kebrt | 89 | dprintf("arch_pre_main\n"); |
2159 | kebrt | 90 | int i; |
91 | |||
92 | init.cnt = bootinfo.cnt; |
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93 | |||
94 | for (i = 0; i < bootinfo.cnt; ++i) { |
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95 | init.tasks[i].addr = bootinfo.tasks[i].addr; |
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96 | init.tasks[i].size = bootinfo.tasks[i].size; |
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97 | } |
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98 | |||
2245 | stepan | 99 | /* TODO this code just setups irq testing bed */ |
2235 | stepan | 100 | setup_exception_stacks(); |
2128 | jermar | 101 | } |
102 | |||
103 | void arch_pre_mm_init(void) |
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104 | { |
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2264 | kebrt | 105 | dprintf("arch_pre_mm_init\n"); |
2245 | stepan | 106 | |
107 | /* It is not assumed by default */ |
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108 | interrupts_disable(); |
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109 | |||
2128 | jermar | 110 | } |
111 | |||
2280 | jancik | 112 | void prefetch_exception_generator(void); |
113 | |||
2128 | jermar | 114 | void arch_post_mm_init(void) |
115 | { |
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2264 | kebrt | 116 | dprintf("arch_post_mm_init start()\n"); |
2270 | jancik | 117 | /* Initialize dispatch table |
118 | Note: Have to be after page_init() */ |
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119 | exception_init(); |
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120 | |||
2280 | jancik | 121 | // drivers_init(); |
2263 | kebrt | 122 | interrupt_init(); |
2235 | stepan | 123 | |
2280 | jancik | 124 | // console_init(device_assign_devno()); |
2263 | kebrt | 125 | //fb_init(0x12000000, 640, 480, 1920, VISUAL_RGB_8_8_8); |
126 | |||
2280 | jancik | 127 | // interrupts_enable(); |
128 | // asm __volatile__ ("ldr pc, =0x70000000"); // prefetch exception |
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129 | //while(1); |
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130 | /* |
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131 | uspace_arg_t uspace; |
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132 | uspace.uspace_entry = (void*)prefetch_exception_generator; |
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133 | uspace.uspace_stack = (void*)0x6000000; |
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134 | uspace.uspace_uarg = &uspace; |
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135 | |||
136 | userspace(&uspace); |
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137 | */ |
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2264 | kebrt | 138 | dprintf("arch_post_mm_init end()\n"); |
2128 | jermar | 139 | } |
140 | |||
141 | void arch_post_cpu_init(void) |
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142 | { |
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143 | /* TODO */ |
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144 | } |
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145 | |||
146 | void arch_pre_smp_init(void) |
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147 | { |
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148 | /* TODO */ |
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149 | } |
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150 | |||
151 | void arch_post_smp_init(void) |
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152 | { |
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153 | /* TODO */ |
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154 | } |
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155 | |||
156 | /** Perform arm32 specific tasks needed before the new task is run. */ |
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157 | void before_task_runs_arch(void) |
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158 | { |
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159 | /* TODO */ |
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160 | } |
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161 | |||
162 | /** Perform arm32 specific tasks needed before the new thread is scheduled. */ |
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163 | void before_thread_runs_arch(void) |
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164 | { |
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165 | /* TODO */ |
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166 | } |
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167 | |||
168 | void after_thread_ran_arch(void) |
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169 | { |
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170 | /* TODO */ |
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171 | } |
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172 | |||
2280 | jancik | 173 | /** Struct to hold general purpose register values */ |
174 | typedef struct { |
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175 | uint32_t r0; |
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176 | uint32_t r1; |
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177 | uint32_t r2; |
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178 | uint32_t r3; |
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179 | uint32_t r4; |
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180 | uint32_t r5; |
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181 | uint32_t r6; |
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182 | uint32_t r7; |
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183 | uint32_t r8; |
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184 | uint32_t r9; |
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185 | uint32_t r10; |
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186 | uint32_t r11; |
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187 | uint32_t r12; |
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188 | uint32_t sp; |
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189 | uint32_t lr; |
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190 | uint32_t pc; |
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191 | } ustate_t; |
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192 | |||
193 | |||
194 | void prefetch_exception_generator(void) { |
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195 | asm __volatile__ ( |
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196 | "ldr pc, =0x7000000" |
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197 | ); |
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198 | |||
199 | } |
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200 | |||
201 | /** Change processor mode and jump into addres specified in |
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202 | * kernel_uarg.uspace_entry |
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203 | * \param kernel_uarg information needed for correct setting of userspace |
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204 | */ |
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205 | void userspace(uspace_arg_t *kernel_uarg) |
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206 | { |
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207 | // WILL be changed .. after exception return .. eret will be done |
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208 | /* |
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209 | volatile ustate_t ustate; |
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210 | dprintf("userspce krnl_uard .uspace_uarg(%X), .uspace_entry(%X), .uspace_stack(%X)\n", |
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211 | (unsigned int)(kernel_uarg->uspace_uarg), |
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212 | kernel_uarg->uspace_entry, |
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213 | kernel_uarg->uspace_stack); |
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214 | // Step 1 ... prepare user space environmen |
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215 | // set first paramater |
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216 | ustate.r0 = (uintptr_t) kernel_uarg->uspace_uarg; |
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217 | // clear other registers |
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218 | ustate.r1 = ustate.r2 = ustate.r3 = ustate.r4 = |
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219 | ustate.r5 = ustate.r6 = ustate.r7 = ustate.r8 = |
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220 | ustate.r9 = ustate.r10 = ustate.r11 = ustate.r12 = 1; |
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221 | ustate.lr = 3; |
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222 | // set user stack |
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223 | ustate.sp = ((uint32_t)kernel_uarg->uspace_stack)+PAGE_SIZE; |
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224 | // set where uspace executin starts |
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225 | ustate.pc = (uintptr_t) kernel_uarg->uspace_entry; |
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226 | |||
227 | // status register in user mode |
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228 | ipl_t cpsr = current_status_reg_read(); |
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229 | cpsr &= ~STATUS_REG_MODE_MASK | USER_MODE; |
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230 | // |
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231 | ipl_t tmpsr = (cpsr & ~STATUS_REG_MODE_MASK) | ABORT_MODE; |
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232 | |||
233 | asm __volatile__ ( |
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234 | "mov r0, %0 \n" // save pointer into ustate struct |
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235 | "mov r1, %1 \n" // save cspr |
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236 | "msr cpsr_c, %2 \n" // change mode into any exception mode |
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237 | "msr spsr_c, r1 \n" // set saved cpsr ... as user mode |
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238 | "ldmfd r0, {r0-r12, sp, lr, pc}^\n" // jump into user mode |
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239 | : // no output |
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240 | : "r"(&ustate), "r"(cpsr), "r"(tmpsr) // |
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241 | : "r0","r1" |
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242 | ); |
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243 | |||
244 | while(1) |
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245 | ; |
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246 | */ |
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247 | |||
248 | } |
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2128 | jermar | 249 | /** @} |
250 | */ |
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2280 | jancik | 251 | |
252 | |||
253 | |||
254 | |||
255 | |||
256 | |||
257 | |||
258 | |||
259 | |||
260 | |||
261 | |||
262 | |||
263 | |||
264 |