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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 | |||
1812 | decky | 29 | /** @addtogroup mips32 |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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33 | */ |
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575 | palkovsky | 34 | |
1 | jermar | 35 | #include <arch.h> |
1686 | decky | 36 | #include <arch/boot.h> |
1 | jermar | 37 | #include <arch/cp0.h> |
38 | #include <arch/exception.h> |
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313 | palkovsky | 39 | #include <arch/asm.h> |
703 | jermar | 40 | #include <mm/as.h> |
575 | palkovsky | 41 | |
313 | palkovsky | 42 | #include <userspace.h> |
324 | palkovsky | 43 | #include <arch/console.h> |
326 | palkovsky | 44 | #include <memstr.h> |
391 | jermar | 45 | #include <proc/thread.h> |
1078 | jermar | 46 | #include <proc/uarg.h> |
330 | palkovsky | 47 | #include <print.h> |
1112 | palkovsky | 48 | #include <syscall/syscall.h> |
1642 | vana | 49 | #include <sysinfo/sysinfo.h> |
330 | palkovsky | 50 | |
575 | palkovsky | 51 | #include <arch/interrupt.h> |
52 | #include <arch/drivers/arc.h> |
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53 | #include <console/chardev.h> |
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614 | palkovsky | 54 | #include <arch/debugger.h> |
1396 | palkovsky | 55 | #include <genarch/fb/fb.h> |
1812 | decky | 56 | #include <macros.h> |
575 | palkovsky | 57 | |
58 | #include <arch/asm/regname.h> |
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59 | |||
326 | palkovsky | 60 | /* Size of the code jumping to the exception handler code |
61 | * - J+NOP |
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62 | */ |
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63 | #define EXCEPTION_JUMP_SIZE 8 |
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64 | |||
65 | #define TLB_EXC ((char *) 0x80000000) |
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66 | #define NORM_EXC ((char *) 0x80000180) |
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67 | #define CACHE_EXC ((char *) 0x80000100) |
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68 | |||
1686 | decky | 69 | |
1742 | palkovsky | 70 | /* Why the linker moves the variable 64K away in assembler |
71 | * when not in .text section ???????? |
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72 | */ |
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1780 | jermar | 73 | uintptr_t supervisor_sp __attribute__ ((section (".text"))); |
1742 | palkovsky | 74 | /* Stack pointer saved when entering user mode */ |
75 | /* TODO: How do we do it on SMP system???? */ |
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76 | bootinfo_t bootinfo __attribute__ ((section (".text"))); |
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77 | |||
1222 | decky | 78 | void arch_pre_main(void) |
79 | { |
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80 | /* Setup usermode */ |
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1686 | decky | 81 | init.cnt = bootinfo.cnt; |
82 | |||
1780 | jermar | 83 | uint32_t i; |
1686 | decky | 84 | |
85 | for (i = 0; i < bootinfo.cnt; i++) { |
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86 | init.tasks[i].addr = bootinfo.tasks[i].addr; |
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87 | init.tasks[i].size = bootinfo.tasks[i].size; |
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88 | } |
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1222 | decky | 89 | } |
90 | |||
26 | jermar | 91 | void arch_pre_mm_init(void) |
1 | jermar | 92 | { |
329 | palkovsky | 93 | /* It is not assumed by default */ |
413 | jermar | 94 | interrupts_disable(); |
575 | palkovsky | 95 | |
96 | /* Initialize dispatch table */ |
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590 | palkovsky | 97 | exception_init(); |
573 | palkovsky | 98 | arc_init(); |
332 | palkovsky | 99 | |
326 | palkovsky | 100 | /* Copy the exception vectors to the right places */ |
101 | memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE); |
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102 | memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE); |
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103 | memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE); |
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104 | |||
1434 | palkovsky | 105 | interrupt_init(); |
1 | jermar | 106 | /* |
107 | * Switch to BEV normal level so that exception vectors point to the kernel. |
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108 | * Clear the error level. |
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109 | */ |
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110 | cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit)); |
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125 | jermar | 111 | |
329 | palkovsky | 112 | /* |
113 | * Mask all interrupts |
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114 | */ |
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115 | cp0_mask_all_int(); |
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1434 | palkovsky | 116 | |
1 | jermar | 117 | /* |
118 | * Unmask hardware clock interrupt. |
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119 | */ |
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509 | jermar | 120 | cp0_unmask_int(TIMER_IRQ); |
125 | jermar | 121 | |
324 | palkovsky | 122 | console_init(); |
614 | palkovsky | 123 | debugger_init(); |
1 | jermar | 124 | } |
23 | jermar | 125 | |
126 | void arch_post_mm_init(void) |
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127 | { |
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1396 | palkovsky | 128 | #ifdef CONFIG_FB |
1837 | jermar | 129 | fb_init(0x12000000, 640, 480, 24, 1920, false); // gxemul framebuffer |
1396 | palkovsky | 130 | #endif |
1742 | palkovsky | 131 | sysinfo_set_item_val("machine." STRING(MACHINE),NULL,1); |
23 | jermar | 132 | } |
32 | jermar | 133 | |
1901 | jermar | 134 | void arch_post_cpu_init(void) |
135 | { |
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136 | } |
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137 | |||
503 | jermar | 138 | void arch_pre_smp_init(void) |
32 | jermar | 139 | { |
140 | } |
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313 | palkovsky | 141 | |
503 | jermar | 142 | void arch_post_smp_init(void) |
143 | { |
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144 | } |
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145 | |||
1078 | jermar | 146 | void userspace(uspace_arg_t *kernel_uarg) |
313 | palkovsky | 147 | { |
148 | /* EXL=1, UM=1, IE=1 */ |
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149 | cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit | |
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150 | cp0_status_um_bit | |
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151 | cp0_status_ie_enabled_bit)); |
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1780 | jermar | 152 | cp0_epc_write((uintptr_t) kernel_uarg->uspace_entry); |
153 | userspace_asm(((uintptr_t) kernel_uarg->uspace_stack+PAGE_SIZE), |
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154 | (uintptr_t) kernel_uarg->uspace_uarg, |
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155 | (uintptr_t) kernel_uarg->uspace_entry); |
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313 | palkovsky | 156 | while (1) |
157 | ; |
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158 | } |
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159 | |||
1187 | jermar | 160 | /** Perform mips32 specific tasks needed before the new task is run. */ |
161 | void before_task_runs_arch(void) |
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162 | { |
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163 | } |
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164 | |||
165 | /** Perform mips32 specific tasks needed before the new thread is scheduled. */ |
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313 | palkovsky | 166 | void before_thread_runs_arch(void) |
167 | { |
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1780 | jermar | 168 | supervisor_sp = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
313 | palkovsky | 169 | } |
897 | jermar | 170 | |
171 | void after_thread_ran_arch(void) |
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172 | { |
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173 | } |
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1112 | palkovsky | 174 | |
1121 | jermar | 175 | /** Set thread-local-storage pointer |
1112 | palkovsky | 176 | * |
177 | * We have it currently in K1, it is |
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178 | * possible to have it separately in the future. |
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179 | */ |
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1780 | jermar | 180 | unative_t sys_tls_set(unative_t addr) |
1112 | palkovsky | 181 | { |
182 | return 0; |
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183 | } |
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1474 | palkovsky | 184 | |
1812 | decky | 185 | /** @} |
1702 | cejka | 186 | */ |