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1810 | decky | 1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
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3 | * All rights reserved. |
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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 xen32 |
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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 | #include <arch.h> |
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36 | |||
37 | #include <arch/types.h> |
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38 | #include <typedefs.h> |
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1824 | decky | 39 | #include <align.h> |
1810 | decky | 40 | |
41 | #include <arch/pm.h> |
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42 | |||
1816 | decky | 43 | #include <arch/drivers/xconsole.h> |
1824 | decky | 44 | #include <arch/mm/page.h> |
1810 | decky | 45 | |
46 | #include <arch/context.h> |
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47 | |||
48 | #include <config.h> |
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49 | |||
50 | #include <arch/interrupt.h> |
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51 | #include <arch/asm.h> |
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52 | #include <genarch/acpi/acpi.h> |
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53 | |||
54 | #include <arch/bios/bios.h> |
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55 | |||
1813 | decky | 56 | #include <arch/boot/boot.h> |
1810 | decky | 57 | #include <arch/mm/memory_init.h> |
58 | #include <interrupt.h> |
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59 | #include <arch/debugger.h> |
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60 | #include <proc/thread.h> |
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61 | #include <syscall/syscall.h> |
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62 | #include <console/console.h> |
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63 | |||
1813 | decky | 64 | start_info_t start_info; |
1824 | decky | 65 | memzone_t meminfo; |
1813 | decky | 66 | |
1829 | decky | 67 | extern void xen_callback(void); |
68 | extern void xen_failsafe_callback(void); |
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69 | |||
1824 | decky | 70 | void arch_pre_main(void) |
71 | { |
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72 | xen_vm_assist(VMASST_CMD_ENABLE, VMASST_TYPE_WRITABLE_PAGETABLES); |
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73 | |||
74 | pte_t pte; |
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75 | memsetb((uintptr_t) &pte, sizeof(pte), 0); |
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76 | |||
77 | pte.present = 1; |
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78 | pte.writeable = 1; |
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79 | pte.frame_address = ADDR2PFN((uintptr_t) start_info.shared_info); |
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80 | xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG); |
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81 | |||
1832 | decky | 82 | pte.present = 1; |
83 | pte.writeable = 1; |
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84 | pte.frame_address = start_info.console_mfn; |
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85 | xen_update_va_mapping(&console_page, pte, UVMF_INVLPG); |
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86 | |||
1829 | decky | 87 | xen_set_callbacks(XEN_CS, xen_callback, XEN_CS, xen_failsafe_callback); |
88 | |||
1824 | decky | 89 | /* Create identity mapping */ |
90 | |||
91 | meminfo.start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames; |
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92 | meminfo.size = start_info.frames - meminfo.start; |
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93 | meminfo.reserved = 0; |
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94 | |||
95 | uintptr_t pa; |
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96 | index_t last_ptl0 = 0; |
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97 | for (pa = PFN2ADDR(meminfo.start); pa < PFN2ADDR(meminfo.start + meminfo.size); pa += FRAME_SIZE) { |
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98 | uintptr_t va = PA2KA(pa); |
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99 | |||
100 | if ((PTL0_INDEX(va) != last_ptl0) && (GET_PTL1_FLAGS(start_info.ptl0, PTL0_INDEX(va)) & PAGE_NOT_PRESENT)) { |
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101 | /* New page directory entry needed */ |
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102 | uintptr_t tpa = PFN2ADDR(meminfo.start + meminfo.reserved); |
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103 | uintptr_t tva = PA2KA(tpa); |
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104 | |||
105 | memsetb(tva, PAGE_SIZE, 0); |
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106 | |||
107 | pte_t *tptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(tva))); |
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108 | SET_FRAME_FLAGS(tptl3, PTL3_INDEX(tva), PAGE_PRESENT); |
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109 | SET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va), tpa); |
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110 | |||
111 | last_ptl0 = PTL0_INDEX(va); |
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112 | meminfo.reserved++; |
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113 | } |
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114 | |||
115 | pte_t *ptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va))); |
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116 | |||
117 | SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(va), pa); |
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118 | SET_FRAME_FLAGS(ptl3, PTL3_INDEX(va), PAGE_PRESENT | PAGE_WRITE); |
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119 | } |
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120 | } |
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121 | |||
1810 | decky | 122 | void arch_pre_mm_init(void) |
123 | { |
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1816 | decky | 124 | pm_init(); |
1810 | decky | 125 | |
126 | if (config.cpu_active == 1) { |
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127 | // bios_init(); |
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128 | |||
1829 | decky | 129 | exc_register(VECTOR_SYSCALL, "syscall", (iroutine) syscall); |
1810 | decky | 130 | |
131 | #ifdef CONFIG_SMP |
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1829 | decky | 132 | exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown", |
133 | (iroutine) tlb_shootdown_ipi); |
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1810 | decky | 134 | #endif /* CONFIG_SMP */ |
135 | } |
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136 | } |
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137 | |||
138 | void arch_post_mm_init(void) |
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139 | { |
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140 | if (config.cpu_active == 1) { |
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1816 | decky | 141 | /* video */ |
142 | xen_console_init(); |
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1810 | decky | 143 | /* Enable debugger */ |
144 | debugger_init(); |
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145 | /* Merge all memory zones to 1 big zone */ |
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146 | zone_merge_all(); |
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147 | } |
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148 | } |
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149 | |||
150 | void arch_pre_smp_init(void) |
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151 | { |
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152 | if (config.cpu_active == 1) { |
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153 | memory_print_map(); |
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154 | |||
155 | #ifdef CONFIG_SMP |
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156 | acpi_init(); |
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157 | #endif /* CONFIG_SMP */ |
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158 | } |
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159 | } |
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160 | |||
161 | void arch_post_smp_init(void) |
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162 | { |
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163 | } |
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164 | |||
165 | void calibrate_delay_loop(void) |
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166 | { |
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1816 | decky | 167 | // i8254_calibrate_delay_loop(); |
1810 | decky | 168 | if (config.cpu_active == 1) { |
169 | /* |
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170 | * This has to be done only on UP. |
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171 | * On SMP, i8254 is not used for time keeping and its interrupt pin remains masked. |
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172 | */ |
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1816 | decky | 173 | // i8254_normal_operation(); |
1810 | decky | 174 | } |
175 | } |
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176 | |||
177 | /** Set thread-local-storage pointer |
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178 | * |
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179 | * TLS pointer is set in GS register. That means, the GS contains |
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180 | * selector, and the descriptor->base is the correct address. |
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181 | */ |
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182 | unative_t sys_tls_set(unative_t addr) |
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183 | { |
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184 | THREAD->arch.tls = addr; |
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185 | set_tls_desc(addr); |
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186 | |||
187 | return 0; |
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188 | } |
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189 | |||
190 | /** Acquire console back for kernel |
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191 | * |
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192 | */ |
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193 | void arch_grab_console(void) |
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194 | { |
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195 | } |
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1816 | decky | 196 | |
1810 | decky | 197 | /** Return console to userspace |
198 | * |
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199 | */ |
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200 | void arch_release_console(void) |
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201 | { |
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202 | } |
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203 | |||
204 | /** @} |
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205 | */ |