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1 | jermar | 1 | /* |
319 | jermar | 2 | * Copyright (C) 2003-2004 Jakub Jermar |
1 | 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 | |||
575 | palkovsky | 29 | |
1 | jermar | 30 | #include <arch.h> |
31 | #include <arch/cp0.h> |
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32 | #include <arch/exception.h> |
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313 | palkovsky | 33 | #include <arch/asm.h> |
703 | jermar | 34 | #include <mm/as.h> |
575 | palkovsky | 35 | |
313 | palkovsky | 36 | #include <userspace.h> |
324 | palkovsky | 37 | #include <arch/console.h> |
326 | palkovsky | 38 | #include <memstr.h> |
391 | jermar | 39 | #include <proc/thread.h> |
1078 | jermar | 40 | #include <proc/uarg.h> |
330 | palkovsky | 41 | #include <print.h> |
1112 | palkovsky | 42 | #include <syscall/syscall.h> |
330 | palkovsky | 43 | |
575 | palkovsky | 44 | #include <arch/interrupt.h> |
45 | #include <arch/drivers/arc.h> |
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46 | #include <console/chardev.h> |
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614 | palkovsky | 47 | #include <arch/debugger.h> |
1396 | palkovsky | 48 | #include <genarch/fb/fb.h> |
575 | palkovsky | 49 | |
50 | #include <arch/asm/regname.h> |
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51 | |||
326 | palkovsky | 52 | /* Size of the code jumping to the exception handler code |
53 | * - J+NOP |
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54 | */ |
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55 | #define EXCEPTION_JUMP_SIZE 8 |
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56 | |||
57 | #define TLB_EXC ((char *) 0x80000000) |
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58 | #define NORM_EXC ((char *) 0x80000180) |
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59 | #define CACHE_EXC ((char *) 0x80000100) |
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60 | |||
1222 | decky | 61 | void arch_pre_main(void) |
62 | { |
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63 | /* Setup usermode */ |
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1354 | palkovsky | 64 | init.cnt = 3; |
1222 | decky | 65 | init.tasks[0].addr = INIT_ADDRESS; |
66 | init.tasks[0].size = INIT_SIZE; |
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1332 | palkovsky | 67 | init.tasks[1].addr = INIT_ADDRESS + 0x100000; |
68 | init.tasks[1].size = INIT_SIZE; |
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69 | init.tasks[2].addr = INIT_ADDRESS + 0x200000; |
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70 | init.tasks[2].size = INIT_SIZE; |
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1222 | decky | 71 | } |
72 | |||
26 | jermar | 73 | void arch_pre_mm_init(void) |
1 | jermar | 74 | { |
329 | palkovsky | 75 | /* It is not assumed by default */ |
413 | jermar | 76 | interrupts_disable(); |
575 | palkovsky | 77 | |
78 | /* Initialize dispatch table */ |
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590 | palkovsky | 79 | exception_init(); |
575 | palkovsky | 80 | interrupt_init(); |
329 | palkovsky | 81 | |
573 | palkovsky | 82 | arc_init(); |
332 | palkovsky | 83 | |
326 | palkovsky | 84 | /* Copy the exception vectors to the right places */ |
85 | memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE); |
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86 | memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE); |
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87 | memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE); |
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88 | |||
1 | jermar | 89 | /* |
90 | * Switch to BEV normal level so that exception vectors point to the kernel. |
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91 | * Clear the error level. |
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92 | */ |
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93 | cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit)); |
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125 | jermar | 94 | |
329 | palkovsky | 95 | /* |
96 | * Mask all interrupts |
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97 | */ |
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98 | cp0_mask_all_int(); |
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1 | jermar | 99 | /* |
100 | * Unmask hardware clock interrupt. |
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101 | */ |
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509 | jermar | 102 | cp0_unmask_int(TIMER_IRQ); |
125 | jermar | 103 | |
1 | jermar | 104 | /* |
105 | * Start hardware clock. |
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106 | */ |
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324 | palkovsky | 107 | cp0_compare_write(cp0_compare_value + cp0_count_read()); |
108 | |||
109 | console_init(); |
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614 | palkovsky | 110 | debugger_init(); |
1 | jermar | 111 | } |
23 | jermar | 112 | |
113 | void arch_post_mm_init(void) |
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114 | { |
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1396 | palkovsky | 115 | #ifdef CONFIG_FB |
116 | fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer |
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117 | #endif |
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23 | jermar | 118 | } |
32 | jermar | 119 | |
503 | jermar | 120 | void arch_pre_smp_init(void) |
32 | jermar | 121 | { |
122 | } |
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313 | palkovsky | 123 | |
503 | jermar | 124 | void arch_post_smp_init(void) |
125 | { |
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126 | } |
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127 | |||
794 | palkovsky | 128 | /* Stack pointer saved when entering user mode */ |
129 | /* TODO: How do we do it on SMP system???? */ |
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130 | |||
812 | jermar | 131 | /* Why the linker moves the variable 64K away in assembler |
794 | palkovsky | 132 | * when not in .text section ???????? |
133 | */ |
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134 | __address supervisor_sp __attribute__ ((section (".text"))); |
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135 | |||
1078 | jermar | 136 | void userspace(uspace_arg_t *kernel_uarg) |
313 | palkovsky | 137 | { |
138 | /* EXL=1, UM=1, IE=1 */ |
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139 | cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit | |
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140 | cp0_status_um_bit | |
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141 | cp0_status_ie_enabled_bit)); |
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1078 | jermar | 142 | cp0_epc_write((__address) kernel_uarg->uspace_entry); |
1122 | palkovsky | 143 | userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE), |
144 | (__address) kernel_uarg->uspace_uarg, |
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145 | (__address) kernel_uarg->uspace_entry); |
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313 | palkovsky | 146 | while (1) |
147 | ; |
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148 | } |
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149 | |||
1187 | jermar | 150 | /** Perform mips32 specific tasks needed before the new task is run. */ |
151 | void before_task_runs_arch(void) |
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152 | { |
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153 | } |
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154 | |||
155 | /** Perform mips32 specific tasks needed before the new thread is scheduled. */ |
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313 | palkovsky | 156 | void before_thread_runs_arch(void) |
157 | { |
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158 | supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
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159 | } |
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897 | jermar | 160 | |
161 | void after_thread_ran_arch(void) |
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162 | { |
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163 | } |
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1112 | palkovsky | 164 | |
1121 | jermar | 165 | /** Set thread-local-storage pointer |
1112 | palkovsky | 166 | * |
167 | * We have it currently in K1, it is |
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168 | * possible to have it separately in the future. |
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169 | */ |
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170 | __native sys_tls_set(__native addr) |
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171 | { |
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172 | return 0; |
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173 | } |